From 2abdfe24402907e7e8c103bdd4166f26b74200c2 Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 24 Aug 2018 13:17:29 +0100
Subject: [PATCH 01/52] softfloat: Add scaling int-to-float routines

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814002653.12828-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 fpu/softfloat.c         | 188 +++++++++++++++++++++++++++++-----------
 include/fpu/softfloat.h |  56 ++++++++----
 2 files changed, 179 insertions(+), 65 deletions(-)

diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 7d63cffdeb..12f373cbad 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -1603,81 +1603,122 @@ FLOAT_TO_UINT(64, 64)
  * to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
  */
 
-static FloatParts int_to_float(int64_t a, float_status *status)
+static FloatParts int_to_float(int64_t a, int scale, float_status *status)
 {
-    FloatParts r = {};
+    FloatParts r = { .sign = false };
+
     if (a == 0) {
         r.cls = float_class_zero;
-        r.sign = false;
-    } else if (a == (1ULL << 63)) {
-        r.cls = float_class_normal;
-        r.sign = true;
-        r.frac = DECOMPOSED_IMPLICIT_BIT;
-        r.exp = 63;
     } else {
-        uint64_t f;
-        if (a < 0) {
-            f = -a;
-            r.sign = true;
-        } else {
-            f = a;
-            r.sign = false;
-        }
-        int shift = clz64(f) - 1;
+        uint64_t f = a;
+        int shift;
+
         r.cls = float_class_normal;
-        r.exp = (DECOMPOSED_BINARY_POINT - shift);
-        r.frac = f << shift;
+        if (a < 0) {
+            f = -f;
+            r.sign = true;
+        }
+        shift = clz64(f) - 1;
+        scale = MIN(MAX(scale, -0x10000), 0x10000);
+
+        r.exp = DECOMPOSED_BINARY_POINT - shift + scale;
+        r.frac = (shift < 0 ? DECOMPOSED_IMPLICIT_BIT : f << shift);
     }
 
     return r;
 }
 
+float16 int64_to_float16_scalbn(int64_t a, int scale, float_status *status)
+{
+    FloatParts pa = int_to_float(a, scale, status);
+    return float16_round_pack_canonical(pa, status);
+}
+
+float16 int32_to_float16_scalbn(int32_t a, int scale, float_status *status)
+{
+    return int64_to_float16_scalbn(a, scale, status);
+}
+
+float16 int16_to_float16_scalbn(int16_t a, int scale, float_status *status)
+{
+    return int64_to_float16_scalbn(a, scale, status);
+}
+
 float16 int64_to_float16(int64_t a, float_status *status)
 {
-    FloatParts pa = int_to_float(a, status);
-    return float16_round_pack_canonical(pa, status);
+    return int64_to_float16_scalbn(a, 0, status);
 }
 
 float16 int32_to_float16(int32_t a, float_status *status)
 {
-    return int64_to_float16(a, status);
+    return int64_to_float16_scalbn(a, 0, status);
 }
 
 float16 int16_to_float16(int16_t a, float_status *status)
 {
-    return int64_to_float16(a, status);
+    return int64_to_float16_scalbn(a, 0, status);
+}
+
+float32 int64_to_float32_scalbn(int64_t a, int scale, float_status *status)
+{
+    FloatParts pa = int_to_float(a, scale, status);
+    return float32_round_pack_canonical(pa, status);
+}
+
+float32 int32_to_float32_scalbn(int32_t a, int scale, float_status *status)
+{
+    return int64_to_float32_scalbn(a, scale, status);
+}
+
+float32 int16_to_float32_scalbn(int16_t a, int scale, float_status *status)
+{
+    return int64_to_float32_scalbn(a, scale, status);
 }
 
 float32 int64_to_float32(int64_t a, float_status *status)
 {
-    FloatParts pa = int_to_float(a, status);
-    return float32_round_pack_canonical(pa, status);
+    return int64_to_float32_scalbn(a, 0, status);
 }
 
 float32 int32_to_float32(int32_t a, float_status *status)
 {
-    return int64_to_float32(a, status);
+    return int64_to_float32_scalbn(a, 0, status);
 }
 
 float32 int16_to_float32(int16_t a, float_status *status)
 {
-    return int64_to_float32(a, status);
+    return int64_to_float32_scalbn(a, 0, status);
+}
+
+float64 int64_to_float64_scalbn(int64_t a, int scale, float_status *status)
+{
+    FloatParts pa = int_to_float(a, scale, status);
+    return float64_round_pack_canonical(pa, status);
+}
+
+float64 int32_to_float64_scalbn(int32_t a, int scale, float_status *status)
+{
+    return int64_to_float64_scalbn(a, scale, status);
+}
+
+float64 int16_to_float64_scalbn(int16_t a, int scale, float_status *status)
+{
+    return int64_to_float64_scalbn(a, scale, status);
 }
 
 float64 int64_to_float64(int64_t a, float_status *status)
 {
-    FloatParts pa = int_to_float(a, status);
-    return float64_round_pack_canonical(pa, status);
+    return int64_to_float64_scalbn(a, 0, status);
 }
 
 float64 int32_to_float64(int32_t a, float_status *status)
 {
-    return int64_to_float64(a, status);
+    return int64_to_float64_scalbn(a, 0, status);
 }
 
 float64 int16_to_float64(int16_t a, float_status *status)
 {
-    return int64_to_float64(a, status);
+    return int64_to_float64_scalbn(a, 0, status);
 }
 
 
@@ -1689,73 +1730,120 @@ float64 int16_to_float64(int16_t a, float_status *status)
  * IEC/IEEE Standard for Binary Floating-Point Arithmetic.
  */
 
-static FloatParts uint_to_float(uint64_t a, float_status *status)
+static FloatParts uint_to_float(uint64_t a, int scale, float_status *status)
 {
-    FloatParts r = { .sign = false};
+    FloatParts r = { .sign = false };
 
     if (a == 0) {
         r.cls = float_class_zero;
     } else {
-        int spare_bits = clz64(a) - 1;
+        scale = MIN(MAX(scale, -0x10000), 0x10000);
         r.cls = float_class_normal;
-        r.exp = DECOMPOSED_BINARY_POINT - spare_bits;
-        if (spare_bits < 0) {
-            shift64RightJamming(a, -spare_bits, &a);
+        if ((int64_t)a < 0) {
+            r.exp = DECOMPOSED_BINARY_POINT + 1 + scale;
+            shift64RightJamming(a, 1, &a);
             r.frac = a;
         } else {
-            r.frac = a << spare_bits;
+            int shift = clz64(a) - 1;
+            r.exp = DECOMPOSED_BINARY_POINT - shift + scale;
+            r.frac = a << shift;
         }
     }
 
     return r;
 }
 
+float16 uint64_to_float16_scalbn(uint64_t a, int scale, float_status *status)
+{
+    FloatParts pa = uint_to_float(a, scale, status);
+    return float16_round_pack_canonical(pa, status);
+}
+
+float16 uint32_to_float16_scalbn(uint32_t a, int scale, float_status *status)
+{
+    return uint64_to_float16_scalbn(a, scale, status);
+}
+
+float16 uint16_to_float16_scalbn(uint16_t a, int scale, float_status *status)
+{
+    return uint64_to_float16_scalbn(a, scale, status);
+}
+
 float16 uint64_to_float16(uint64_t a, float_status *status)
 {
-    FloatParts pa = uint_to_float(a, status);
-    return float16_round_pack_canonical(pa, status);
+    return uint64_to_float16_scalbn(a, 0, status);
 }
 
 float16 uint32_to_float16(uint32_t a, float_status *status)
 {
-    return uint64_to_float16(a, status);
+    return uint64_to_float16_scalbn(a, 0, status);
 }
 
 float16 uint16_to_float16(uint16_t a, float_status *status)
 {
-    return uint64_to_float16(a, status);
+    return uint64_to_float16_scalbn(a, 0, status);
+}
+
+float32 uint64_to_float32_scalbn(uint64_t a, int scale, float_status *status)
+{
+    FloatParts pa = uint_to_float(a, scale, status);
+    return float32_round_pack_canonical(pa, status);
+}
+
+float32 uint32_to_float32_scalbn(uint32_t a, int scale, float_status *status)
+{
+    return uint64_to_float32_scalbn(a, scale, status);
+}
+
+float32 uint16_to_float32_scalbn(uint16_t a, int scale, float_status *status)
+{
+    return uint64_to_float32_scalbn(a, scale, status);
 }
 
 float32 uint64_to_float32(uint64_t a, float_status *status)
 {
-    FloatParts pa = uint_to_float(a, status);
-    return float32_round_pack_canonical(pa, status);
+    return uint64_to_float32_scalbn(a, 0, status);
 }
 
 float32 uint32_to_float32(uint32_t a, float_status *status)
 {
-    return uint64_to_float32(a, status);
+    return uint64_to_float32_scalbn(a, 0, status);
 }
 
 float32 uint16_to_float32(uint16_t a, float_status *status)
 {
-    return uint64_to_float32(a, status);
+    return uint64_to_float32_scalbn(a, 0, status);
+}
+
+float64 uint64_to_float64_scalbn(uint64_t a, int scale, float_status *status)
+{
+    FloatParts pa = uint_to_float(a, scale, status);
+    return float64_round_pack_canonical(pa, status);
+}
+
+float64 uint32_to_float64_scalbn(uint32_t a, int scale, float_status *status)
+{
+    return uint64_to_float64_scalbn(a, scale, status);
+}
+
+float64 uint16_to_float64_scalbn(uint16_t a, int scale, float_status *status)
+{
+    return uint64_to_float64_scalbn(a, scale, status);
 }
 
 float64 uint64_to_float64(uint64_t a, float_status *status)
 {
-    FloatParts pa = uint_to_float(a, status);
-    return float64_round_pack_canonical(pa, status);
+    return uint64_to_float64_scalbn(a, 0, status);
 }
 
 float64 uint32_to_float64(uint32_t a, float_status *status)
 {
-    return uint64_to_float64(a, status);
+    return uint64_to_float64_scalbn(a, 0, status);
 }
 
 float64 uint16_to_float64(uint16_t a, float_status *status)
 {
-    return uint64_to_float64(a, status);
+    return uint64_to_float64_scalbn(a, 0, status);
 }
 
 /* Float Min/Max */
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 69f4dbc4db..038e375e71 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -190,22 +190,54 @@ enum {
 /*----------------------------------------------------------------------------
 | Software IEC/IEEE integer-to-floating-point conversion routines.
 *----------------------------------------------------------------------------*/
+
+float16 int16_to_float16_scalbn(int16_t a, int, float_status *status);
+float16 int32_to_float16_scalbn(int32_t a, int, float_status *status);
+float16 int64_to_float16_scalbn(int64_t a, int, float_status *status);
+float16 uint16_to_float16_scalbn(uint16_t a, int, float_status *status);
+float16 uint32_to_float16_scalbn(uint32_t a, int, float_status *status);
+float16 uint64_to_float16_scalbn(uint64_t a, int, float_status *status);
+
+float16 int16_to_float16(int16_t a, float_status *status);
+float16 int32_to_float16(int32_t a, float_status *status);
+float16 int64_to_float16(int64_t a, float_status *status);
+float16 uint16_to_float16(uint16_t a, float_status *status);
+float16 uint32_to_float16(uint32_t a, float_status *status);
+float16 uint64_to_float16(uint64_t a, float_status *status);
+
+float32 int16_to_float32_scalbn(int16_t, int, float_status *status);
+float32 int32_to_float32_scalbn(int32_t, int, float_status *status);
+float32 int64_to_float32_scalbn(int64_t, int, float_status *status);
+float32 uint16_to_float32_scalbn(uint16_t, int, float_status *status);
+float32 uint32_to_float32_scalbn(uint32_t, int, float_status *status);
+float32 uint64_to_float32_scalbn(uint64_t, int, float_status *status);
+
 float32 int16_to_float32(int16_t, float_status *status);
 float32 int32_to_float32(int32_t, float_status *status);
-float64 int16_to_float64(int16_t, float_status *status);
-float64 int32_to_float64(int32_t, float_status *status);
+float32 int64_to_float32(int64_t, float_status *status);
 float32 uint16_to_float32(uint16_t, float_status *status);
 float32 uint32_to_float32(uint32_t, float_status *status);
+float32 uint64_to_float32(uint64_t, float_status *status);
+
+float64 int16_to_float64_scalbn(int16_t, int, float_status *status);
+float64 int32_to_float64_scalbn(int32_t, int, float_status *status);
+float64 int64_to_float64_scalbn(int64_t, int, float_status *status);
+float64 uint16_to_float64_scalbn(uint16_t, int, float_status *status);
+float64 uint32_to_float64_scalbn(uint32_t, int, float_status *status);
+float64 uint64_to_float64_scalbn(uint64_t, int, float_status *status);
+
+float64 int16_to_float64(int16_t, float_status *status);
+float64 int32_to_float64(int32_t, float_status *status);
+float64 int64_to_float64(int64_t, float_status *status);
 float64 uint16_to_float64(uint16_t, float_status *status);
 float64 uint32_to_float64(uint32_t, float_status *status);
-floatx80 int32_to_floatx80(int32_t, float_status *status);
-float128 int32_to_float128(int32_t, float_status *status);
-float32 int64_to_float32(int64_t, float_status *status);
-float64 int64_to_float64(int64_t, float_status *status);
-floatx80 int64_to_floatx80(int64_t, float_status *status);
-float128 int64_to_float128(int64_t, float_status *status);
-float32 uint64_to_float32(uint64_t, float_status *status);
 float64 uint64_to_float64(uint64_t, float_status *status);
+
+floatx80 int32_to_floatx80(int32_t, float_status *status);
+floatx80 int64_to_floatx80(int64_t, float_status *status);
+
+float128 int32_to_float128(int32_t, float_status *status);
+float128 int64_to_float128(int64_t, float_status *status);
 float128 uint64_to_float128(uint64_t, float_status *status);
 
 /*----------------------------------------------------------------------------
@@ -227,12 +259,6 @@ int64_t float16_to_int64(float16, float_status *status);
 uint64_t float16_to_uint64(float16 a, float_status *status);
 int64_t float16_to_int64_round_to_zero(float16, float_status *status);
 uint64_t float16_to_uint64_round_to_zero(float16 a, float_status *status);
-float16 int16_to_float16(int16_t a, float_status *status);
-float16 int32_to_float16(int32_t a, float_status *status);
-float16 int64_to_float16(int64_t a, float_status *status);
-float16 uint16_to_float16(uint16_t a, float_status *status);
-float16 uint32_to_float16(uint32_t a, float_status *status);
-float16 uint64_to_float16(uint64_t a, float_status *status);
 
 /*----------------------------------------------------------------------------
 | Software half-precision operations.

From 2f6c74be593ec5219e54d7b4abd4e5a98d7f3efc Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 24 Aug 2018 13:17:30 +0100
Subject: [PATCH 02/52] softfloat: Add scaling float-to-int routines

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814002653.12828-3-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 fpu/softfloat.c         | 391 ++++++++++++++++++++++++++++++++--------
 include/fpu/softfloat.h |  85 ++++++---
 2 files changed, 379 insertions(+), 97 deletions(-)

diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 12f373cbad..59ca356d0e 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -1293,19 +1293,23 @@ float32 float64_to_float32(float64 a, float_status *s)
  * Arithmetic.
  */
 
-static FloatParts round_to_int(FloatParts a, int rounding_mode, float_status *s)
+static FloatParts round_to_int(FloatParts a, int rmode,
+                               int scale, float_status *s)
 {
-    if (is_nan(a.cls)) {
-        return return_nan(a, s);
-    }
-
     switch (a.cls) {
+    case float_class_qnan:
+    case float_class_snan:
+        return return_nan(a, s);
+
     case float_class_zero:
     case float_class_inf:
-    case float_class_qnan:
         /* already "integral" */
         break;
+
     case float_class_normal:
+        scale = MIN(MAX(scale, -0x10000), 0x10000);
+        a.exp += scale;
+
         if (a.exp >= DECOMPOSED_BINARY_POINT) {
             /* already integral */
             break;
@@ -1314,7 +1318,7 @@ static FloatParts round_to_int(FloatParts a, int rounding_mode, float_status *s)
             bool one;
             /* all fractional */
             s->float_exception_flags |= float_flag_inexact;
-            switch (rounding_mode) {
+            switch (rmode) {
             case float_round_nearest_even:
                 one = a.exp == -1 && a.frac > DECOMPOSED_IMPLICIT_BIT;
                 break;
@@ -1347,7 +1351,7 @@ static FloatParts round_to_int(FloatParts a, int rounding_mode, float_status *s)
             uint64_t rnd_mask = rnd_even_mask >> 1;
             uint64_t inc;
 
-            switch (rounding_mode) {
+            switch (rmode) {
             case float_round_nearest_even:
                 inc = ((a.frac & rnd_even_mask) != frac_lsbm1 ? frac_lsbm1 : 0);
                 break;
@@ -1387,28 +1391,28 @@ static FloatParts round_to_int(FloatParts a, int rounding_mode, float_status *s)
 float16 float16_round_to_int(float16 a, float_status *s)
 {
     FloatParts pa = float16_unpack_canonical(a, s);
-    FloatParts pr = round_to_int(pa, s->float_rounding_mode, s);
+    FloatParts pr = round_to_int(pa, s->float_rounding_mode, 0, s);
     return float16_round_pack_canonical(pr, s);
 }
 
 float32 float32_round_to_int(float32 a, float_status *s)
 {
     FloatParts pa = float32_unpack_canonical(a, s);
-    FloatParts pr = round_to_int(pa, s->float_rounding_mode, s);
+    FloatParts pr = round_to_int(pa, s->float_rounding_mode, 0, s);
     return float32_round_pack_canonical(pr, s);
 }
 
 float64 float64_round_to_int(float64 a, float_status *s)
 {
     FloatParts pa = float64_unpack_canonical(a, s);
-    FloatParts pr = round_to_int(pa, s->float_rounding_mode, s);
+    FloatParts pr = round_to_int(pa, s->float_rounding_mode, 0, s);
     return float64_round_pack_canonical(pr, s);
 }
 
 float64 float64_trunc_to_int(float64 a, float_status *s)
 {
     FloatParts pa = float64_unpack_canonical(a, s);
-    FloatParts pr = round_to_int(pa, float_round_to_zero, s);
+    FloatParts pr = round_to_int(pa, float_round_to_zero, 0, s);
     return float64_round_pack_canonical(pr, s);
 }
 
@@ -1423,13 +1427,13 @@ float64 float64_trunc_to_int(float64 a, float_status *s)
  * is returned.
 */
 
-static int64_t round_to_int_and_pack(FloatParts in, int rmode,
+static int64_t round_to_int_and_pack(FloatParts in, int rmode, int scale,
                                      int64_t min, int64_t max,
                                      float_status *s)
 {
     uint64_t r;
     int orig_flags = get_float_exception_flags(s);
-    FloatParts p = round_to_int(in, rmode, s);
+    FloatParts p = round_to_int(in, rmode, scale, s);
 
     switch (p.cls) {
     case float_class_snan:
@@ -1469,38 +1473,158 @@ static int64_t round_to_int_and_pack(FloatParts in, int rmode,
     }
 }
 
-#define FLOAT_TO_INT(fsz, isz)                                          \
-int ## isz ## _t float ## fsz ## _to_int ## isz(float ## fsz a,         \
-                                                float_status *s)        \
-{                                                                       \
-    FloatParts p = float ## fsz ## _unpack_canonical(a, s);             \
-    return round_to_int_and_pack(p, s->float_rounding_mode,             \
-                                 INT ## isz ## _MIN, INT ## isz ## _MAX,\
-                                 s);                                    \
-}                                                                       \
-                                                                        \
-int ## isz ## _t float ## fsz ## _to_int ## isz ## _round_to_zero       \
- (float ## fsz a, float_status *s)                                      \
-{                                                                       \
-    FloatParts p = float ## fsz ## _unpack_canonical(a, s);             \
-    return round_to_int_and_pack(p, float_round_to_zero,                \
-                                 INT ## isz ## _MIN, INT ## isz ## _MAX,\
-                                 s);                                    \
+int16_t float16_to_int16_scalbn(float16 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float16_unpack_canonical(a, s),
+                                 rmode, scale, INT16_MIN, INT16_MAX, s);
 }
 
-FLOAT_TO_INT(16, 16)
-FLOAT_TO_INT(16, 32)
-FLOAT_TO_INT(16, 64)
+int32_t float16_to_int32_scalbn(float16 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float16_unpack_canonical(a, s),
+                                 rmode, scale, INT32_MIN, INT32_MAX, s);
+}
 
-FLOAT_TO_INT(32, 16)
-FLOAT_TO_INT(32, 32)
-FLOAT_TO_INT(32, 64)
+int64_t float16_to_int64_scalbn(float16 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float16_unpack_canonical(a, s),
+                                 rmode, scale, INT64_MIN, INT64_MAX, s);
+}
 
-FLOAT_TO_INT(64, 16)
-FLOAT_TO_INT(64, 32)
-FLOAT_TO_INT(64, 64)
+int16_t float32_to_int16_scalbn(float32 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float32_unpack_canonical(a, s),
+                                 rmode, scale, INT16_MIN, INT16_MAX, s);
+}
 
-#undef FLOAT_TO_INT
+int32_t float32_to_int32_scalbn(float32 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float32_unpack_canonical(a, s),
+                                 rmode, scale, INT32_MIN, INT32_MAX, s);
+}
+
+int64_t float32_to_int64_scalbn(float32 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float32_unpack_canonical(a, s),
+                                 rmode, scale, INT64_MIN, INT64_MAX, s);
+}
+
+int16_t float64_to_int16_scalbn(float64 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float64_unpack_canonical(a, s),
+                                 rmode, scale, INT16_MIN, INT16_MAX, s);
+}
+
+int32_t float64_to_int32_scalbn(float64 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float64_unpack_canonical(a, s),
+                                 rmode, scale, INT32_MIN, INT32_MAX, s);
+}
+
+int64_t float64_to_int64_scalbn(float64 a, int rmode, int scale,
+                                float_status *s)
+{
+    return round_to_int_and_pack(float64_unpack_canonical(a, s),
+                                 rmode, scale, INT64_MIN, INT64_MAX, s);
+}
+
+int16_t float16_to_int16(float16 a, float_status *s)
+{
+    return float16_to_int16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int32_t float16_to_int32(float16 a, float_status *s)
+{
+    return float16_to_int32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int64_t float16_to_int64(float16 a, float_status *s)
+{
+    return float16_to_int64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int16_t float32_to_int16(float32 a, float_status *s)
+{
+    return float32_to_int16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int32_t float32_to_int32(float32 a, float_status *s)
+{
+    return float32_to_int32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int64_t float32_to_int64(float32 a, float_status *s)
+{
+    return float32_to_int64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int16_t float64_to_int16(float64 a, float_status *s)
+{
+    return float64_to_int16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int32_t float64_to_int32(float64 a, float_status *s)
+{
+    return float64_to_int32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int64_t float64_to_int64(float64 a, float_status *s)
+{
+    return float64_to_int64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+int16_t float16_to_int16_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_int16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int32_t float16_to_int32_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_int32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int64_t float16_to_int64_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_int64_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int16_t float32_to_int16_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_int16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int32_t float32_to_int32_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_int32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int64_t float32_to_int64_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_int64_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int16_t float64_to_int16_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_int16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int32_t float64_to_int32_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_int32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+int64_t float64_to_int64_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_int64_scalbn(a, float_round_to_zero, 0, s);
+}
 
 /*
  *  Returns the result of converting the floating-point value `a' to
@@ -1515,11 +1639,12 @@ FLOAT_TO_INT(64, 64)
  *  flag.
  */
 
-static uint64_t round_to_uint_and_pack(FloatParts in, int rmode, uint64_t max,
-                                       float_status *s)
+static uint64_t round_to_uint_and_pack(FloatParts in, int rmode, int scale,
+                                       uint64_t max, float_status *s)
 {
     int orig_flags = get_float_exception_flags(s);
-    FloatParts p = round_to_int(in, rmode, s);
+    FloatParts p = round_to_int(in, rmode, scale, s);
+    uint64_t r;
 
     switch (p.cls) {
     case float_class_snan:
@@ -1532,8 +1657,6 @@ static uint64_t round_to_uint_and_pack(FloatParts in, int rmode, uint64_t max,
     case float_class_zero:
         return 0;
     case float_class_normal:
-    {
-        uint64_t r;
         if (p.sign) {
             s->float_exception_flags = orig_flags | float_flag_invalid;
             return 0;
@@ -1555,45 +1678,165 @@ static uint64_t round_to_uint_and_pack(FloatParts in, int rmode, uint64_t max,
         if (r > max) {
             s->float_exception_flags = orig_flags | float_flag_invalid;
             return max;
-        } else {
-            return r;
         }
-    }
+        return r;
     default:
         g_assert_not_reached();
     }
 }
 
-#define FLOAT_TO_UINT(fsz, isz) \
-uint ## isz ## _t float ## fsz ## _to_uint ## isz(float ## fsz a,       \
-                                                  float_status *s)      \
-{                                                                       \
-    FloatParts p = float ## fsz ## _unpack_canonical(a, s);             \
-    return round_to_uint_and_pack(p, s->float_rounding_mode,            \
-                                 UINT ## isz ## _MAX, s);               \
-}                                                                       \
-                                                                        \
-uint ## isz ## _t float ## fsz ## _to_uint ## isz ## _round_to_zero     \
- (float ## fsz a, float_status *s)                                      \
-{                                                                       \
-    FloatParts p = float ## fsz ## _unpack_canonical(a, s);             \
-    return round_to_uint_and_pack(p, float_round_to_zero,               \
-                                  UINT ## isz ## _MAX, s);              \
+uint16_t float16_to_uint16_scalbn(float16 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float16_unpack_canonical(a, s),
+                                  rmode, scale, UINT16_MAX, s);
 }
 
-FLOAT_TO_UINT(16, 16)
-FLOAT_TO_UINT(16, 32)
-FLOAT_TO_UINT(16, 64)
+uint32_t float16_to_uint32_scalbn(float16 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float16_unpack_canonical(a, s),
+                                  rmode, scale, UINT32_MAX, s);
+}
 
-FLOAT_TO_UINT(32, 16)
-FLOAT_TO_UINT(32, 32)
-FLOAT_TO_UINT(32, 64)
+uint64_t float16_to_uint64_scalbn(float16 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float16_unpack_canonical(a, s),
+                                  rmode, scale, UINT64_MAX, s);
+}
 
-FLOAT_TO_UINT(64, 16)
-FLOAT_TO_UINT(64, 32)
-FLOAT_TO_UINT(64, 64)
+uint16_t float32_to_uint16_scalbn(float32 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float32_unpack_canonical(a, s),
+                                  rmode, scale, UINT16_MAX, s);
+}
 
-#undef FLOAT_TO_UINT
+uint32_t float32_to_uint32_scalbn(float32 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float32_unpack_canonical(a, s),
+                                  rmode, scale, UINT32_MAX, s);
+}
+
+uint64_t float32_to_uint64_scalbn(float32 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float32_unpack_canonical(a, s),
+                                  rmode, scale, UINT64_MAX, s);
+}
+
+uint16_t float64_to_uint16_scalbn(float64 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float64_unpack_canonical(a, s),
+                                  rmode, scale, UINT16_MAX, s);
+}
+
+uint32_t float64_to_uint32_scalbn(float64 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float64_unpack_canonical(a, s),
+                                  rmode, scale, UINT32_MAX, s);
+}
+
+uint64_t float64_to_uint64_scalbn(float64 a, int rmode, int scale,
+                                  float_status *s)
+{
+    return round_to_uint_and_pack(float64_unpack_canonical(a, s),
+                                  rmode, scale, UINT64_MAX, s);
+}
+
+uint16_t float16_to_uint16(float16 a, float_status *s)
+{
+    return float16_to_uint16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint32_t float16_to_uint32(float16 a, float_status *s)
+{
+    return float16_to_uint32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint64_t float16_to_uint64(float16 a, float_status *s)
+{
+    return float16_to_uint64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint16_t float32_to_uint16(float32 a, float_status *s)
+{
+    return float32_to_uint16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint32_t float32_to_uint32(float32 a, float_status *s)
+{
+    return float32_to_uint32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint64_t float32_to_uint64(float32 a, float_status *s)
+{
+    return float32_to_uint64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint16_t float64_to_uint16(float64 a, float_status *s)
+{
+    return float64_to_uint16_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint32_t float64_to_uint32(float64 a, float_status *s)
+{
+    return float64_to_uint32_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint64_t float64_to_uint64(float64 a, float_status *s)
+{
+    return float64_to_uint64_scalbn(a, s->float_rounding_mode, 0, s);
+}
+
+uint16_t float16_to_uint16_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_uint16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint32_t float16_to_uint32_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_uint32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint64_t float16_to_uint64_round_to_zero(float16 a, float_status *s)
+{
+    return float16_to_uint64_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint16_t float32_to_uint16_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_uint16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint32_t float32_to_uint32_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_uint32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint64_t float32_to_uint64_round_to_zero(float32 a, float_status *s)
+{
+    return float32_to_uint64_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint16_t float64_to_uint16_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_uint16_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint32_t float64_to_uint32_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_uint32_scalbn(a, float_round_to_zero, 0, s);
+}
+
+uint64_t float64_to_uint64_round_to_zero(float64 a, float_status *s)
+{
+    return float64_to_uint64_scalbn(a, float_round_to_zero, 0, s);
+}
 
 /*
  * Integer to float conversions
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 038e375e71..cc1b58b029 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -243,21 +243,34 @@ float128 uint64_to_float128(uint64_t, float_status *status);
 /*----------------------------------------------------------------------------
 | Software half-precision conversion routines.
 *----------------------------------------------------------------------------*/
+
 float16 float32_to_float16(float32, bool ieee, float_status *status);
 float32 float16_to_float32(float16, bool ieee, float_status *status);
 float16 float64_to_float16(float64 a, bool ieee, float_status *status);
 float64 float16_to_float64(float16 a, bool ieee, float_status *status);
+
+int16_t float16_to_int16_scalbn(float16, int, int, float_status *status);
+int32_t float16_to_int32_scalbn(float16, int, int, float_status *status);
+int64_t float16_to_int64_scalbn(float16, int, int, float_status *status);
+
 int16_t float16_to_int16(float16, float_status *status);
-uint16_t float16_to_uint16(float16 a, float_status *status);
-int16_t float16_to_int16_round_to_zero(float16, float_status *status);
-uint16_t float16_to_uint16_round_to_zero(float16 a, float_status *status);
 int32_t float16_to_int32(float16, float_status *status);
-uint32_t float16_to_uint32(float16 a, float_status *status);
-int32_t float16_to_int32_round_to_zero(float16, float_status *status);
-uint32_t float16_to_uint32_round_to_zero(float16 a, float_status *status);
 int64_t float16_to_int64(float16, float_status *status);
-uint64_t float16_to_uint64(float16 a, float_status *status);
+
+int16_t float16_to_int16_round_to_zero(float16, float_status *status);
+int32_t float16_to_int32_round_to_zero(float16, float_status *status);
 int64_t float16_to_int64_round_to_zero(float16, float_status *status);
+
+uint16_t float16_to_uint16_scalbn(float16 a, int, int, float_status *status);
+uint32_t float16_to_uint32_scalbn(float16 a, int, int, float_status *status);
+uint64_t float16_to_uint64_scalbn(float16 a, int, int, float_status *status);
+
+uint16_t float16_to_uint16(float16 a, float_status *status);
+uint32_t float16_to_uint32(float16 a, float_status *status);
+uint64_t float16_to_uint64(float16 a, float_status *status);
+
+uint16_t float16_to_uint16_round_to_zero(float16 a, float_status *status);
+uint32_t float16_to_uint32_round_to_zero(float16 a, float_status *status);
 uint64_t float16_to_uint64_round_to_zero(float16 a, float_status *status);
 
 /*----------------------------------------------------------------------------
@@ -347,18 +360,31 @@ float16 float16_default_nan(float_status *status);
 /*----------------------------------------------------------------------------
 | Software IEC/IEEE single-precision conversion routines.
 *----------------------------------------------------------------------------*/
+
+int16_t float32_to_int16_scalbn(float32, int, int, float_status *status);
+int32_t float32_to_int32_scalbn(float32, int, int, float_status *status);
+int64_t float32_to_int64_scalbn(float32, int, int, float_status *status);
+
 int16_t float32_to_int16(float32, float_status *status);
-uint16_t float32_to_uint16(float32, float_status *status);
-int16_t float32_to_int16_round_to_zero(float32, float_status *status);
-uint16_t float32_to_uint16_round_to_zero(float32, float_status *status);
 int32_t float32_to_int32(float32, float_status *status);
-int32_t float32_to_int32_round_to_zero(float32, float_status *status);
-uint32_t float32_to_uint32(float32, float_status *status);
-uint32_t float32_to_uint32_round_to_zero(float32, float_status *status);
 int64_t float32_to_int64(float32, float_status *status);
-uint64_t float32_to_uint64(float32, float_status *status);
-uint64_t float32_to_uint64_round_to_zero(float32, float_status *status);
+
+int16_t float32_to_int16_round_to_zero(float32, float_status *status);
+int32_t float32_to_int32_round_to_zero(float32, float_status *status);
 int64_t float32_to_int64_round_to_zero(float32, float_status *status);
+
+uint16_t float32_to_uint16_scalbn(float32, int, int, float_status *status);
+uint32_t float32_to_uint32_scalbn(float32, int, int, float_status *status);
+uint64_t float32_to_uint64_scalbn(float32, int, int, float_status *status);
+
+uint16_t float32_to_uint16(float32, float_status *status);
+uint32_t float32_to_uint32(float32, float_status *status);
+uint64_t float32_to_uint64(float32, float_status *status);
+
+uint16_t float32_to_uint16_round_to_zero(float32, float_status *status);
+uint32_t float32_to_uint32_round_to_zero(float32, float_status *status);
+uint64_t float32_to_uint64_round_to_zero(float32, float_status *status);
+
 float64 float32_to_float64(float32, float_status *status);
 floatx80 float32_to_floatx80(float32, float_status *status);
 float128 float32_to_float128(float32, float_status *status);
@@ -476,18 +502,31 @@ float32 float32_default_nan(float_status *status);
 /*----------------------------------------------------------------------------
 | Software IEC/IEEE double-precision conversion routines.
 *----------------------------------------------------------------------------*/
+
+int16_t float64_to_int16_scalbn(float64, int, int, float_status *status);
+int32_t float64_to_int32_scalbn(float64, int, int, float_status *status);
+int64_t float64_to_int64_scalbn(float64, int, int, float_status *status);
+
 int16_t float64_to_int16(float64, float_status *status);
-uint16_t float64_to_uint16(float64, float_status *status);
-int16_t float64_to_int16_round_to_zero(float64, float_status *status);
-uint16_t float64_to_uint16_round_to_zero(float64, float_status *status);
 int32_t float64_to_int32(float64, float_status *status);
-int32_t float64_to_int32_round_to_zero(float64, float_status *status);
-uint32_t float64_to_uint32(float64, float_status *status);
-uint32_t float64_to_uint32_round_to_zero(float64, float_status *status);
 int64_t float64_to_int64(float64, float_status *status);
+
+int16_t float64_to_int16_round_to_zero(float64, float_status *status);
+int32_t float64_to_int32_round_to_zero(float64, float_status *status);
 int64_t float64_to_int64_round_to_zero(float64, float_status *status);
-uint64_t float64_to_uint64(float64 a, float_status *status);
-uint64_t float64_to_uint64_round_to_zero(float64 a, float_status *status);
+
+uint16_t float64_to_uint16_scalbn(float64, int, int, float_status *status);
+uint32_t float64_to_uint32_scalbn(float64, int, int, float_status *status);
+uint64_t float64_to_uint64_scalbn(float64, int, int, float_status *status);
+
+uint16_t float64_to_uint16(float64, float_status *status);
+uint32_t float64_to_uint32(float64, float_status *status);
+uint64_t float64_to_uint64(float64, float_status *status);
+
+uint16_t float64_to_uint16_round_to_zero(float64, float_status *status);
+uint32_t float64_to_uint32_round_to_zero(float64, float_status *status);
+uint64_t float64_to_uint64_round_to_zero(float64, float_status *status);
+
 float32 float64_to_float32(float64, float_status *status);
 floatx80 float64_to_floatx80(float64, float_status *status);
 float128 float64_to_float128(float64, float_status *status);

From b9b903cf245e4df1199cc7b2b80381ef85a6b1ab Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 24 Aug 2018 13:17:30 +0100
Subject: [PATCH 03/52] target/arm: Use the int-to-float-scale softfloat
 routines

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814002653.12828-4-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 29 +++++------------------------
 1 file changed, 5 insertions(+), 24 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 1b0548084a..7dbdff7424 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11564,12 +11564,7 @@ float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
 #define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \
 float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t  x, uint32_t shift, \
                                      void *fpstp) \
-{ \
-    float_status *fpst = fpstp; \
-    float##fsz tmp; \
-    tmp = itype##_to_##float##fsz(x, fpst); \
-    return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
-}
+{ return itype##_to_##float##fsz##_scalbn(x, -shift, fpstp); }
 
 /* Notice that we want only input-denormal exception flags from the
  * scalbn operation: the other possible flags (overflow+inexact if
@@ -11622,38 +11617,24 @@ VFP_CONV_FIX_A64(uq, s, 32, 64, uint64)
 #undef VFP_CONV_FLOAT_FIX_ROUND
 #undef VFP_CONV_FIX_A64
 
-/* Conversion to/from f16 can overflow to infinity before/after scaling.
- * Therefore we convert to f64, scale, and then convert f64 to f16; or
- * vice versa for conversion to integer.
- *
- * For 16- and 32-bit integers, the conversion to f64 never rounds.
- * For 64-bit integers, any integer that would cause rounding will also
- * overflow to f16 infinity, so there is no double rounding problem.
- */
-
-static float16 do_postscale_fp16(float64 f, int shift, float_status *fpst)
-{
-    return float64_to_float16(float64_scalbn(f, -shift, fpst), true, fpst);
-}
-
 uint32_t HELPER(vfp_sltoh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return do_postscale_fp16(int32_to_float64(x, fpst), shift, fpst);
+    return int32_to_float16_scalbn(x, -shift, fpst);
 }
 
 uint32_t HELPER(vfp_ultoh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return do_postscale_fp16(uint32_to_float64(x, fpst), shift, fpst);
+    return uint32_to_float16_scalbn(x, -shift, fpst);
 }
 
 uint32_t HELPER(vfp_sqtoh)(uint64_t x, uint32_t shift, void *fpst)
 {
-    return do_postscale_fp16(int64_to_float64(x, fpst), shift, fpst);
+    return int64_to_float16_scalbn(x, -shift, fpst);
 }
 
 uint32_t HELPER(vfp_uqtoh)(uint64_t x, uint32_t shift, void *fpst)
 {
-    return do_postscale_fp16(uint64_to_float64(x, fpst), shift, fpst);
+    return uint64_to_float16_scalbn(x, -shift, fpst);
 }
 
 static float64 do_prescale_fp16(float16 f, int shift, float_status *fpst)

From 323cd490845acf663159ca26e35cb977ad9b85a2 Mon Sep 17 00:00:00 2001
From: Richard Henderson <richard.henderson@linaro.org>
Date: Fri, 24 Aug 2018 13:17:31 +0100
Subject: [PATCH 04/52] target/arm: Use the float-to-int-scale softfloat
 routines

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814002653.12828-5-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/helper.c | 101 ++++++++++++++++++++++----------------------
 1 file changed, 51 insertions(+), 50 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7dbdff7424..977f8b0018 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -11566,38 +11566,28 @@ float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t  x, uint32_t shift, \
                                      void *fpstp) \
 { return itype##_to_##float##fsz##_scalbn(x, -shift, fpstp); }
 
-/* Notice that we want only input-denormal exception flags from the
- * scalbn operation: the other possible flags (overflow+inexact if
- * we overflow to infinity, output-denormal) aren't correct for the
- * complete scale-and-convert operation.
- */
-#define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \
-uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \
-                                             uint32_t shift, \
-                                             void *fpstp) \
-{ \
-    float_status *fpst = fpstp; \
-    int old_exc_flags = get_float_exception_flags(fpst); \
-    float##fsz tmp; \
-    if (float##fsz##_is_any_nan(x)) { \
-        float_raise(float_flag_invalid, fpst); \
-        return 0; \
-    } \
-    tmp = float##fsz##_scalbn(x, shift, fpst); \
-    old_exc_flags |= get_float_exception_flags(fpst) \
-        & float_flag_input_denormal; \
-    set_float_exception_flags(old_exc_flags, fpst); \
-    return float##fsz##_to_##itype##round(tmp, fpst); \
+#define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, ROUND, suff)   \
+uint##isz##_t HELPER(vfp_to##name##p##suff)(float##fsz x, uint32_t shift, \
+                                            void *fpst)                   \
+{                                                                         \
+    if (unlikely(float##fsz##_is_any_nan(x))) {                           \
+        float_raise(float_flag_invalid, fpst);                            \
+        return 0;                                                         \
+    }                                                                     \
+    return float##fsz##_to_##itype##_scalbn(x, ROUND, shift, fpst);       \
 }
 
 #define VFP_CONV_FIX(name, p, fsz, isz, itype)                   \
 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype)                     \
-VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \
-VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
+VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype,               \
+                         float_round_to_zero, _round_to_zero)    \
+VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype,               \
+                         get_float_rounding_mode(fpst), )
 
 #define VFP_CONV_FIX_A64(name, p, fsz, isz, itype)               \
 VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype)                     \
-VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, )
+VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype,               \
+                         get_float_rounding_mode(fpst), )
 
 VFP_CONV_FIX(sh, d, 64, 64, int16)
 VFP_CONV_FIX(sl, d, 64, 64, int32)
@@ -11637,53 +11627,64 @@ uint32_t HELPER(vfp_uqtoh)(uint64_t x, uint32_t shift, void *fpst)
     return uint64_to_float16_scalbn(x, -shift, fpst);
 }
 
-static float64 do_prescale_fp16(float16 f, int shift, float_status *fpst)
-{
-    if (unlikely(float16_is_any_nan(f))) {
-        float_raise(float_flag_invalid, fpst);
-        return 0;
-    } else {
-        int old_exc_flags = get_float_exception_flags(fpst);
-        float64 ret;
-
-        ret = float16_to_float64(f, true, fpst);
-        ret = float64_scalbn(ret, shift, fpst);
-        old_exc_flags |= get_float_exception_flags(fpst)
-            & float_flag_input_denormal;
-        set_float_exception_flags(old_exc_flags, fpst);
-
-        return ret;
-    }
-}
-
 uint32_t HELPER(vfp_toshh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_int16(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_int16_scalbn(x, get_float_rounding_mode(fpst),
+                                   shift, fpst);
 }
 
 uint32_t HELPER(vfp_touhh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_uint16(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_uint16_scalbn(x, get_float_rounding_mode(fpst),
+                                    shift, fpst);
 }
 
 uint32_t HELPER(vfp_toslh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_int32(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_int32_scalbn(x, get_float_rounding_mode(fpst),
+                                   shift, fpst);
 }
 
 uint32_t HELPER(vfp_toulh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_uint32(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_uint32_scalbn(x, get_float_rounding_mode(fpst),
+                                    shift, fpst);
 }
 
 uint64_t HELPER(vfp_tosqh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_int64(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_int64_scalbn(x, get_float_rounding_mode(fpst),
+                                   shift, fpst);
 }
 
 uint64_t HELPER(vfp_touqh)(uint32_t x, uint32_t shift, void *fpst)
 {
-    return float64_to_uint64(do_prescale_fp16(x, shift, fpst), fpst);
+    if (unlikely(float16_is_any_nan(x))) {
+        float_raise(float_flag_invalid, fpst);
+        return 0;
+    }
+    return float16_to_uint64_scalbn(x, get_float_rounding_mode(fpst),
+                                    shift, fpst);
 }
 
 /* Set the current fp rounding mode and return the old one.

From 7210918cade19b7c6f14c4403aac0fd381c07b1d Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:31 +0100
Subject: [PATCH 05/52] hw/intc/arm_gic: Make per-cpu GICH memory regions 0x200
 bytes large

Reduce the size of the per-cpu GICH memory regions from 0x1000
to 0x200. The registers only cover 0x200 bytes, and the Cortex-A15
wants to map them at a spacing of 0x200 bytes apart. Having the
region be too large interferes with mapping them like that, so
reduce it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-3-peter.maydell@linaro.org
---
 hw/intc/arm_gic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c
index c1b35fc1ee..542b4b93ea 100644
--- a/hw/intc/arm_gic.c
+++ b/hw/intc/arm_gic.c
@@ -2084,7 +2084,7 @@ static void arm_gic_realize(DeviceState *dev, Error **errp)
         for (i = 0; i < s->num_cpu; i++) {
             memory_region_init_io(&s->vifaceiomem[i + 1], OBJECT(s),
                                   &gic_viface_ops, &s->backref[i],
-                                  "gic_viface", 0x1000);
+                                  "gic_viface", 0x200);
             sysbus_init_mmio(sbd, &s->vifaceiomem[i + 1]);
         }
     }

From 33383e9bbb5e5d083d491d84197c60ca8d4a9b4f Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:32 +0100
Subject: [PATCH 06/52] hw/arm/vexpress: Connect VIRQ and VFIQ

Connect the VIRQ and VFIQ lines from the GIC to the CPU;
these exist always for both CPU and GIC whether the
virtualization extensions are enabled or not, so we
can just unconditionally connect them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-4-peter.maydell@linaro.org
---
 hw/arm/vexpress.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index 5bfe2e4348..dc47ed84c2 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -251,6 +251,10 @@ static void init_cpus(const char *cpu_type, const char *privdev,
         sysbus_connect_irq(busdev, n, qdev_get_gpio_in(cpudev, ARM_CPU_IRQ));
         sysbus_connect_irq(busdev, n + smp_cpus,
                            qdev_get_gpio_in(cpudev, ARM_CPU_FIQ));
+        sysbus_connect_irq(busdev, n + 2 * smp_cpus,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_VIRQ));
+        sysbus_connect_irq(busdev, n + 3 * smp_cpus,
+                           qdev_get_gpio_in(cpudev, ARM_CPU_VFIQ));
     }
 }
 

From 582c8f75a23376d50e9be4f2fa1d21356b32b0c6 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:33 +0100
Subject: [PATCH 07/52] hw/arm/highbank: Connect VIRQ and VFIQ

Connect the VIRQ and VFIQ lines from the GIC to the CPU;
these exist always for both CPU and GIC whether the
virtualization extensions are enabled or not, so we
can just unconditionally connect them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-5-peter.maydell@linaro.org
---
 hw/arm/highbank.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index 6d42fce2c3..fb9efa02c3 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -243,6 +243,8 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
     int n;
     qemu_irq cpu_irq[4];
     qemu_irq cpu_fiq[4];
+    qemu_irq cpu_virq[4];
+    qemu_irq cpu_vfiq[4];
     MemoryRegion *sysram;
     MemoryRegion *dram;
     MemoryRegion *sysmem;
@@ -282,6 +284,8 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
         object_property_set_bool(cpuobj, true, "realized", &error_fatal);
         cpu_irq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_IRQ);
         cpu_fiq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_FIQ);
+        cpu_virq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_VIRQ);
+        cpu_vfiq[n] = qdev_get_gpio_in(DEVICE(cpu), ARM_CPU_VFIQ);
     }
 
     sysmem = get_system_memory();
@@ -329,6 +333,8 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id)
     for (n = 0; n < smp_cpus; n++) {
         sysbus_connect_irq(busdev, n, cpu_irq[n]);
         sysbus_connect_irq(busdev, n + smp_cpus, cpu_fiq[n]);
+        sysbus_connect_irq(busdev, n + 2 * smp_cpus, cpu_virq[n]);
+        sysbus_connect_irq(busdev, n + 3 * smp_cpus, cpu_vfiq[n]);
     }
 
     for (n = 0; n < 128; n++) {

From 256d3e21f22c2c285d8c170ea6488825cc7c7ae2 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:33 +0100
Subject: [PATCH 08/52] hw/arm/fsl-imx6ul: Connect VIRQ and VFIQ

Connect the VIRQ and VFIQ lines from the GIC to the CPU;
these exist always for both CPU and GIC whether the
virtualization extensions are enabled or not, so we
can just unconditionally connect them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-6-peter.maydell@linaro.org
---
 hw/arm/fsl-imx6ul.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/arm/fsl-imx6ul.c b/hw/arm/fsl-imx6ul.c
index 258f470623..4b56bfa8d1 100644
--- a/hw/arm/fsl-imx6ul.c
+++ b/hw/arm/fsl-imx6ul.c
@@ -207,6 +207,10 @@ static void fsl_imx6ul_realize(DeviceState *dev, Error **errp)
         irq = qdev_get_gpio_in(d, ARM_CPU_IRQ);
         sysbus_connect_irq(sbd, i, irq);
         sysbus_connect_irq(sbd, i + smp_cpus, qdev_get_gpio_in(d, ARM_CPU_FIQ));
+        sysbus_connect_irq(sbd, i + 2 * smp_cpus,
+                           qdev_get_gpio_in(d, ARM_CPU_VIRQ));
+        sysbus_connect_irq(sbd, i + 3 * smp_cpus,
+                           qdev_get_gpio_in(d, ARM_CPU_VFIQ));
     }
 
     /*

From b558e295211deecdc769835a0a400f8aa59c53fd Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:34 +0100
Subject: [PATCH 09/52] hw/arm/fsl-imx6ul: Connect VIRQ and VFIQ

Connect the VIRQ and VFIQ lines from the GIC to the CPU;
these exist always for both CPU and GIC whether the
virtualization extensions are enabled or not, so we
can just unconditionally connect them.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-7-peter.maydell@linaro.org
---
 hw/arm/fsl-imx7.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/arm/fsl-imx7.c b/hw/arm/fsl-imx7.c
index d5e26855a5..7663ad6861 100644
--- a/hw/arm/fsl-imx7.c
+++ b/hw/arm/fsl-imx7.c
@@ -209,6 +209,10 @@ static void fsl_imx7_realize(DeviceState *dev, Error **errp)
         sysbus_connect_irq(sbd, i, irq);
         irq = qdev_get_gpio_in(d, ARM_CPU_FIQ);
         sysbus_connect_irq(sbd, i + smp_cpus, irq);
+        irq = qdev_get_gpio_in(d, ARM_CPU_VIRQ);
+        sysbus_connect_irq(sbd, i + 2 * smp_cpus, irq);
+        irq = qdev_get_gpio_in(d, ARM_CPU_VFIQ);
+        sysbus_connect_irq(sbd, i + 3 * smp_cpus, irq);
     }
 
     /*

From ba3287d117066fef2ebfea9555197f94c950afc5 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:34 +0100
Subject: [PATCH 10/52] hw/cpu/a15mpcore: If CPU has EL2, enable it on the GIC
 and wire it up

For the A15MPCore internal peripheral object, we handle GIC
security extensions support by checking whether the CPUs
have EL3 enabled; if so then we enable it also on the GIC.
Handle the virtualization extensions in the same way: if the
CPU has EL2 then enable it on the GIC and wire up the
virtualization-specific memory regions and the maintenance
interrupt.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-8-peter.maydell@linaro.org
---
 hw/cpu/a15mpcore.c | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/hw/cpu/a15mpcore.c b/hw/cpu/a15mpcore.c
index 43c1079493..5649843cd8 100644
--- a/hw/cpu/a15mpcore.c
+++ b/hw/cpu/a15mpcore.c
@@ -53,6 +53,7 @@ static void a15mp_priv_realize(DeviceState *dev, Error **errp)
     int i;
     Error *err = NULL;
     bool has_el3;
+    bool has_el2 = false;
     Object *cpuobj;
 
     gicdev = DEVICE(&s->gic);
@@ -67,6 +68,10 @@ static void a15mp_priv_realize(DeviceState *dev, Error **errp)
         has_el3 = object_property_find(cpuobj, "has_el3", NULL) &&
             object_property_get_bool(cpuobj, "has_el3", &error_abort);
         qdev_prop_set_bit(gicdev, "has-security-extensions", has_el3);
+        /* Similarly for virtualization support */
+        has_el2 = object_property_find(cpuobj, "has_el2", NULL) &&
+            object_property_get_bool(cpuobj, "has_el2", &error_abort);
+        qdev_prop_set_bit(gicdev, "has-virtualization-extensions", has_el2);
     }
 
     object_property_set_bool(OBJECT(&s->gic), true, "realized", &err);
@@ -103,20 +108,40 @@ static void a15mp_priv_realize(DeviceState *dev, Error **errp)
                                   qdev_get_gpio_in(gicdev,
                                                    ppibase + timer_irq[irq]));
         }
+        if (has_el2) {
+            /* Connect the GIC maintenance interrupt to PPI ID 25 */
+            sysbus_connect_irq(SYS_BUS_DEVICE(gicdev), i + 4 * s->num_cpu,
+                               qdev_get_gpio_in(gicdev, ppibase + 25));
+        }
     }
 
     /* Memory map (addresses are offsets from PERIPHBASE):
      *  0x0000-0x0fff -- reserved
      *  0x1000-0x1fff -- GIC Distributor
      *  0x2000-0x3fff -- GIC CPU interface
-     *  0x4000-0x4fff -- GIC virtual interface control (not modelled)
-     *  0x5000-0x5fff -- GIC virtual interface control (not modelled)
-     *  0x6000-0x7fff -- GIC virtual CPU interface (not modelled)
+     *  0x4000-0x4fff -- GIC virtual interface control for this CPU
+     *  0x5000-0x51ff -- GIC virtual interface control for CPU 0
+     *  0x5200-0x53ff -- GIC virtual interface control for CPU 1
+     *  0x5400-0x55ff -- GIC virtual interface control for CPU 2
+     *  0x5600-0x57ff -- GIC virtual interface control for CPU 3
+     *  0x6000-0x7fff -- GIC virtual CPU interface
      */
     memory_region_add_subregion(&s->container, 0x1000,
                                 sysbus_mmio_get_region(busdev, 0));
     memory_region_add_subregion(&s->container, 0x2000,
                                 sysbus_mmio_get_region(busdev, 1));
+    if (has_el2) {
+        memory_region_add_subregion(&s->container, 0x4000,
+                                    sysbus_mmio_get_region(busdev, 2));
+        memory_region_add_subregion(&s->container, 0x6000,
+                                    sysbus_mmio_get_region(busdev, 3));
+        for (i = 0; i < s->num_cpu; i++) {
+            hwaddr base = 0x5000 + i * 0x200;
+            MemoryRegion *mr = sysbus_mmio_get_region(busdev,
+                                                      4 + s->num_cpu + i);
+            memory_region_add_subregion(&s->container, base, mr);
+        }
+    }
 }
 
 static Property a15mp_priv_properties[] = {

From 3921019abc87bb1ceefb71a9b829614eb98d5ba9 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:35 +0100
Subject: [PATCH 11/52] hw/arm/vexpress: Don't set info->secure_boot if CPU
 doesn't have EL3

Don't request that the arm_load_kernel() code should boot in secure
state if the CPU doesn't have a secure state. Currently this
doesn't make a difference because the boot.c code only examines
the secure_boot flag in code guarded by an ARM_FEATURE_EL3 check,
but upcoming changes for supporting booting into Hyp mode will
change that.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-9-peter.maydell@linaro.org
---
 hw/arm/vexpress.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index dc47ed84c2..3631f4de3a 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -705,8 +705,8 @@ static void vexpress_common_init(MachineState *machine)
     daughterboard->bootinfo.smp_bootreg_addr = map[VE_SYSREGS] + 0x30;
     daughterboard->bootinfo.gic_cpu_if_addr = daughterboard->gic_cpu_if_addr;
     daughterboard->bootinfo.modify_dtb = vexpress_modify_dtb;
-    /* Indicate that when booting Linux we should be in secure state */
-    daughterboard->bootinfo.secure_boot = true;
+    /* When booting Linux we should be in secure state if the CPU has one. */
+    daughterboard->bootinfo.secure_boot = vms->secure;
     arm_load_kernel(ARM_CPU(first_cpu), &daughterboard->bootinfo);
 }
 

From cac0d80809d9c323cb0ed06843804844c7e09f6b Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:35 +0100
Subject: [PATCH 12/52] hw/arm/vexpress: Add "virtualization" property
 controlling presence of EL2

Add a "virtualization" property to the vexpress-a15 board,
controlling presence of EL2. As with EL3, we default to
enabling it, but the user can disable it if they have an
older guest which can't cope with it being present.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180821132811.17675-10-peter.maydell@linaro.org
---
 hw/arm/vexpress.c | 56 ++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 53 insertions(+), 3 deletions(-)

diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c
index 3631f4de3a..c02d18ee61 100644
--- a/hw/arm/vexpress.c
+++ b/hw/arm/vexpress.c
@@ -172,6 +172,7 @@ typedef struct {
 typedef struct {
     MachineState parent;
     bool secure;
+    bool virt;
 } VexpressMachineState;
 
 #define TYPE_VEXPRESS_MACHINE   "vexpress"
@@ -203,7 +204,7 @@ struct VEDBoardInfo {
 };
 
 static void init_cpus(const char *cpu_type, const char *privdev,
-                      hwaddr periphbase, qemu_irq *pic, bool secure)
+                      hwaddr periphbase, qemu_irq *pic, bool secure, bool virt)
 {
     DeviceState *dev;
     SysBusDevice *busdev;
@@ -216,6 +217,11 @@ static void init_cpus(const char *cpu_type, const char *privdev,
         if (!secure) {
             object_property_set_bool(cpuobj, false, "has_el3", NULL);
         }
+        if (!virt) {
+            if (object_property_find(cpuobj, "has_el2", NULL)) {
+                object_property_set_bool(cpuobj, false, "has_el2", NULL);
+            }
+        }
 
         if (object_property_find(cpuobj, "reset-cbar", NULL)) {
             object_property_set_int(cpuobj, periphbase,
@@ -289,7 +295,8 @@ static void a9_daughterboard_init(const VexpressMachineState *vms,
     memory_region_add_subregion(sysmem, 0x60000000, ram);
 
     /* 0x1e000000 A9MPCore (SCU) private memory region */
-    init_cpus(cpu_type, TYPE_A9MPCORE_PRIV, 0x1e000000, pic, vms->secure);
+    init_cpus(cpu_type, TYPE_A9MPCORE_PRIV, 0x1e000000, pic,
+              vms->secure, vms->virt);
 
     /* Daughterboard peripherals : 0x10020000 .. 0x20000000 */
 
@@ -370,7 +377,8 @@ static void a15_daughterboard_init(const VexpressMachineState *vms,
     memory_region_add_subregion(sysmem, 0x80000000, ram);
 
     /* 0x2c000000 A15MPCore private memory region (GIC) */
-    init_cpus(cpu_type, TYPE_A15MPCORE_PRIV, 0x2c000000, pic, vms->secure);
+    init_cpus(cpu_type, TYPE_A15MPCORE_PRIV, 0x2c000000, pic, vms->secure,
+              vms->virt);
 
     /* A15 daughterboard peripherals: */
 
@@ -724,6 +732,20 @@ static void vexpress_set_secure(Object *obj, bool value, Error **errp)
     vms->secure = value;
 }
 
+static bool vexpress_get_virt(Object *obj, Error **errp)
+{
+    VexpressMachineState *vms = VEXPRESS_MACHINE(obj);
+
+    return vms->virt;
+}
+
+static void vexpress_set_virt(Object *obj, bool value, Error **errp)
+{
+    VexpressMachineState *vms = VEXPRESS_MACHINE(obj);
+
+    vms->virt = value;
+}
+
 static void vexpress_instance_init(Object *obj)
 {
     VexpressMachineState *vms = VEXPRESS_MACHINE(obj);
@@ -738,6 +760,32 @@ static void vexpress_instance_init(Object *obj)
                                     NULL);
 }
 
+static void vexpress_a15_instance_init(Object *obj)
+{
+    VexpressMachineState *vms = VEXPRESS_MACHINE(obj);
+
+    /*
+     * For the vexpress-a15, EL2 is by default enabled if EL3 is,
+     * but can also be specifically set to on or off.
+     */
+    vms->virt = true;
+    object_property_add_bool(obj, "virtualization", vexpress_get_virt,
+                             vexpress_set_virt, NULL);
+    object_property_set_description(obj, "virtualization",
+                                    "Set on/off to enable/disable the ARM "
+                                    "Virtualization Extensions "
+                                    "(defaults to same as 'secure')",
+                                    NULL);
+}
+
+static void vexpress_a9_instance_init(Object *obj)
+{
+    VexpressMachineState *vms = VEXPRESS_MACHINE(obj);
+
+    /* The A9 doesn't have the virt extensions */
+    vms->virt = false;
+}
+
 static void vexpress_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
@@ -784,12 +832,14 @@ static const TypeInfo vexpress_a9_info = {
     .name = TYPE_VEXPRESS_A9_MACHINE,
     .parent = TYPE_VEXPRESS_MACHINE,
     .class_init = vexpress_a9_class_init,
+    .instance_init = vexpress_a9_instance_init,
 };
 
 static const TypeInfo vexpress_a15_info = {
     .name = TYPE_VEXPRESS_A15_MACHINE,
     .parent = TYPE_VEXPRESS_MACHINE,
     .class_init = vexpress_a15_class_init,
+    .instance_init = vexpress_a15_instance_init,
 };
 
 static void vexpress_machine_init(void)

From 0e0456ab8895a5e85998904549e331d36c2692a5 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:36 +0100
Subject: [PATCH 13/52] target/arm: Implement RAZ/WI HACTLR2

The v8 AArch32 HACTLR2 register maps to bits [63:32] of ACTLR_EL2.
We implement ACTLR_EL2 as RAZ/WI, so make HACTLR2 also RAZ/WI.
(We put the regdef next to ACTLR_EL2 as a reminder in case we
ever make ACTLR_EL2 something other than RAZ/WI).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-2-peter.maydell@linaro.org
---
 target/arm/helper.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 977f8b0018..d816e72fc3 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -5459,6 +5459,16 @@ void register_cp_regs_for_features(ARMCPU *cpu)
             REGINFO_SENTINEL
         };
         define_arm_cp_regs(cpu, auxcr_reginfo);
+        if (arm_feature(env, ARM_FEATURE_V8)) {
+            /* HACTLR2 maps to ACTLR_EL2[63:32] and is not in ARMv7 */
+            ARMCPRegInfo hactlr2_reginfo = {
+                .name = "HACTLR2", .state = ARM_CP_STATE_AA32,
+                .cp = 15, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 3,
+                .access = PL2_RW, .type = ARM_CP_CONST,
+                .resetvalue = 0
+            };
+            define_one_arm_cp_reg(cpu, &hactlr2_reginfo);
+        }
     }
 
     if (arm_feature(env, ARM_FEATURE_CBAR)) {

From ce4afed8396aabaf87cd42fbe8a4c14f7a9d5c10 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:37 +0100
Subject: [PATCH 14/52] target/arm: Implement AArch32 HCR and HCR2

The AArch32 HCR and HCR2 registers alias HCR_EL2
bits [31:0] and [63:32]; implement them.

Since HCR2 exists in ARMv8 but not ARMv7, we need new
regdef arrays for "we have EL3, not EL2, we're ARMv8"
and "we have EL2, we're ARMv8" to hold the definitions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-3-peter.maydell@linaro.org
---
 target/arm/helper.c | 54 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 50 insertions(+), 4 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index d816e72fc3..f0f5fe66ff 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -3754,11 +3754,11 @@ static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = {
       .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0,
       .access = PL2_RW,
       .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
-    { .name = "HCR_EL2", .state = ARM_CP_STATE_AA64,
+    { .name = "HCR_EL2", .state = ARM_CP_STATE_BOTH,
       .type = ARM_CP_NO_RAW,
       .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
       .access = PL2_RW,
-      .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore },
+      .type = ARM_CP_CONST, .resetvalue = 0 },
     { .name = "ESR_EL2", .state = ARM_CP_STATE_BOTH,
       .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 0,
       .access = PL2_RW,
@@ -3857,6 +3857,15 @@ static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = {
     REGINFO_SENTINEL
 };
 
+/* Ditto, but for registers which exist in ARMv8 but not v7 */
+static const ARMCPRegInfo el3_no_el2_v8_cp_reginfo[] = {
+    { .name = "HCR2", .state = ARM_CP_STATE_AA32,
+      .cp = 15, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 4,
+      .access = PL2_RW,
+      .type = ARM_CP_CONST, .resetvalue = 0 },
+    REGINFO_SENTINEL
+};
+
 static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
 {
     ARMCPU *cpu = arm_env_get_cpu(env);
@@ -3883,10 +3892,26 @@ static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
      * HCR_PTW forbids certain page-table setups
      * HCR_DC Disables stage1 and enables stage2 translation
      */
-    if ((raw_read(env, ri) ^ value) & (HCR_VM | HCR_PTW | HCR_DC)) {
+    if ((env->cp15.hcr_el2 ^ value) & (HCR_VM | HCR_PTW | HCR_DC)) {
         tlb_flush(CPU(cpu));
     }
-    raw_write(env, ri, value);
+    env->cp15.hcr_el2 = value;
+}
+
+static void hcr_writehigh(CPUARMState *env, const ARMCPRegInfo *ri,
+                          uint64_t value)
+{
+    /* Handle HCR2 write, i.e. write to high half of HCR_EL2 */
+    value = deposit64(env->cp15.hcr_el2, 32, 32, value);
+    hcr_write(env, NULL, value);
+}
+
+static void hcr_writelow(CPUARMState *env, const ARMCPRegInfo *ri,
+                         uint64_t value)
+{
+    /* Handle HCR write, i.e. write to low half of HCR_EL2 */
+    value = deposit64(env->cp15.hcr_el2, 0, 32, value);
+    hcr_write(env, NULL, value);
 }
 
 static const ARMCPRegInfo el2_cp_reginfo[] = {
@@ -3894,6 +3919,11 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
       .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
       .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2),
       .writefn = hcr_write },
+    { .name = "HCR", .state = ARM_CP_STATE_AA32,
+      .type = ARM_CP_ALIAS,
+      .cp = 15, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0,
+      .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2),
+      .writefn = hcr_writelow },
     { .name = "ELR_EL2", .state = ARM_CP_STATE_AA64,
       .type = ARM_CP_ALIAS,
       .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1,
@@ -4128,6 +4158,16 @@ static const ARMCPRegInfo el2_cp_reginfo[] = {
     REGINFO_SENTINEL
 };
 
+static const ARMCPRegInfo el2_v8_cp_reginfo[] = {
+    { .name = "HCR2", .state = ARM_CP_STATE_AA32,
+      .type = ARM_CP_ALIAS,
+      .cp = 15, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 4,
+      .access = PL2_RW,
+      .fieldoffset = offsetofhigh32(CPUARMState, cp15.hcr_el2),
+      .writefn = hcr_writehigh },
+    REGINFO_SENTINEL
+};
+
 static CPAccessResult nsacr_access(CPUARMState *env, const ARMCPRegInfo *ri,
                                    bool isread)
 {
@@ -5179,6 +5219,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
         };
         define_arm_cp_regs(cpu, vpidr_regs);
         define_arm_cp_regs(cpu, el2_cp_reginfo);
+        if (arm_feature(env, ARM_FEATURE_V8)) {
+            define_arm_cp_regs(cpu, el2_v8_cp_reginfo);
+        }
         /* RVBAR_EL2 is only implemented if EL2 is the highest EL */
         if (!arm_feature(env, ARM_FEATURE_EL3)) {
             ARMCPRegInfo rvbar = {
@@ -5211,6 +5254,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
             };
             define_arm_cp_regs(cpu, vpidr_regs);
             define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo);
+            if (arm_feature(env, ARM_FEATURE_V8)) {
+                define_arm_cp_regs(cpu, el3_no_el2_v8_cp_reginfo);
+            }
         }
     }
     if (arm_feature(env, ARM_FEATURE_EL3)) {

From dea8378bb3e86f2c6bd05afb3927619f7c51bb47 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:37 +0100
Subject: [PATCH 15/52] target/arm: Factor out code for taking an AArch32
 exception

Factor out the code which changes the CPU state so as to
actually take an exception to AArch32. We're going to want
to use this for handling exception entry to Hyp mode.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-4-peter.maydell@linaro.org
---
 target/arm/helper.c | 64 +++++++++++++++++++++++++++++----------------
 1 file changed, 41 insertions(+), 23 deletions(-)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index f0f5fe66ff..48ec46ae34 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -8033,6 +8033,46 @@ void aarch64_sync_64_to_32(CPUARMState *env)
     env->regs[15] = env->pc;
 }
 
+static void take_aarch32_exception(CPUARMState *env, int new_mode,
+                                   uint32_t mask, uint32_t offset,
+                                   uint32_t newpc)
+{
+    /* Change the CPU state so as to actually take the exception. */
+    switch_mode(env, new_mode);
+    /*
+     * For exceptions taken to AArch32 we must clear the SS bit in both
+     * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
+     */
+    env->uncached_cpsr &= ~PSTATE_SS;
+    env->spsr = cpsr_read(env);
+    /* Clear IT bits.  */
+    env->condexec_bits = 0;
+    /* Switch to the new mode, and to the correct instruction set.  */
+    env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
+    /* Set new mode endianness */
+    env->uncached_cpsr &= ~CPSR_E;
+    if (env->cp15.sctlr_el[arm_current_el(env)] & SCTLR_EE) {
+        env->uncached_cpsr |= CPSR_E;
+    }
+    env->daif |= mask;
+
+    if (new_mode == ARM_CPU_MODE_HYP) {
+        env->thumb = (env->cp15.sctlr_el[2] & SCTLR_TE) != 0;
+        env->elr_el[2] = env->regs[15];
+    } else {
+        /*
+         * this is a lie, as there was no c1_sys on V4T/V5, but who cares
+         * and we should just guard the thumb mode on V4
+         */
+        if (arm_feature(env, ARM_FEATURE_V4T)) {
+            env->thumb =
+                (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_TE) != 0;
+        }
+        env->regs[14] = env->regs[15] + offset;
+    }
+    env->regs[15] = newpc;
+}
+
 static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
 {
     ARMCPU *cpu = ARM_CPU(cs);
@@ -8175,29 +8215,7 @@ static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
         env->cp15.scr_el3 &= ~SCR_NS;
     }
 
-    switch_mode (env, new_mode);
-    /* For exceptions taken to AArch32 we must clear the SS bit in both
-     * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now.
-     */
-    env->uncached_cpsr &= ~PSTATE_SS;
-    env->spsr = cpsr_read(env);
-    /* Clear IT bits.  */
-    env->condexec_bits = 0;
-    /* Switch to the new mode, and to the correct instruction set.  */
-    env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
-    /* Set new mode endianness */
-    env->uncached_cpsr &= ~CPSR_E;
-    if (env->cp15.sctlr_el[arm_current_el(env)] & SCTLR_EE) {
-        env->uncached_cpsr |= CPSR_E;
-    }
-    env->daif |= mask;
-    /* this is a lie, as the was no c1_sys on V4T/V5, but who cares
-     * and we should just guard the thumb mode on V4 */
-    if (arm_feature(env, ARM_FEATURE_V4T)) {
-        env->thumb = (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_TE) != 0;
-    }
-    env->regs[14] = env->regs[15] + offset;
-    env->regs[15] = addr;
+    take_aarch32_exception(env, new_mode, mask, offset, addr);
 }
 
 /* Handle exception entry to a target EL which is using AArch64 */

From b9bc21ff9f9bb2d841adf1dc7f6f8ddfb9ab8b5e Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:38 +0100
Subject: [PATCH 16/52] target/arm: Implement support for taking exceptions to
 Hyp mode

Implement the necessary support code for taking exceptions
to Hyp mode in AArch32.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-5-peter.maydell@linaro.org
---
 target/arm/helper.c | 82 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index 48ec46ae34..b0353921aa 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -8073,6 +8073,83 @@ static void take_aarch32_exception(CPUARMState *env, int new_mode,
     env->regs[15] = newpc;
 }
 
+static void arm_cpu_do_interrupt_aarch32_hyp(CPUState *cs)
+{
+    /*
+     * Handle exception entry to Hyp mode; this is sufficiently
+     * different to entry to other AArch32 modes that we handle it
+     * separately here.
+     *
+     * The vector table entry used is always the 0x14 Hyp mode entry point,
+     * unless this is an UNDEF/HVC/abort taken from Hyp to Hyp.
+     * The offset applied to the preferred return address is always zero
+     * (see DDI0487C.a section G1.12.3).
+     * PSTATE A/I/F masks are set based only on the SCR.EA/IRQ/FIQ values.
+     */
+    uint32_t addr, mask;
+    ARMCPU *cpu = ARM_CPU(cs);
+    CPUARMState *env = &cpu->env;
+
+    switch (cs->exception_index) {
+    case EXCP_UDEF:
+        addr = 0x04;
+        break;
+    case EXCP_SWI:
+        addr = 0x14;
+        break;
+    case EXCP_BKPT:
+        /* Fall through to prefetch abort.  */
+    case EXCP_PREFETCH_ABORT:
+        env->cp15.ifar_s = env->exception.vaddress;
+        qemu_log_mask(CPU_LOG_INT, "...with HIFAR 0x%x\n",
+                      (uint32_t)env->exception.vaddress);
+        addr = 0x0c;
+        break;
+    case EXCP_DATA_ABORT:
+        env->cp15.dfar_s = env->exception.vaddress;
+        qemu_log_mask(CPU_LOG_INT, "...with HDFAR 0x%x\n",
+                      (uint32_t)env->exception.vaddress);
+        addr = 0x10;
+        break;
+    case EXCP_IRQ:
+        addr = 0x18;
+        break;
+    case EXCP_FIQ:
+        addr = 0x1c;
+        break;
+    case EXCP_HVC:
+        addr = 0x08;
+        break;
+    case EXCP_HYP_TRAP:
+        addr = 0x14;
+    default:
+        cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index);
+    }
+
+    if (cs->exception_index != EXCP_IRQ && cs->exception_index != EXCP_FIQ) {
+        env->cp15.esr_el[2] = env->exception.syndrome;
+    }
+
+    if (arm_current_el(env) != 2 && addr < 0x14) {
+        addr = 0x14;
+    }
+
+    mask = 0;
+    if (!(env->cp15.scr_el3 & SCR_EA)) {
+        mask |= CPSR_A;
+    }
+    if (!(env->cp15.scr_el3 & SCR_IRQ)) {
+        mask |= CPSR_I;
+    }
+    if (!(env->cp15.scr_el3 & SCR_FIQ)) {
+        mask |= CPSR_F;
+    }
+
+    addr += env->cp15.hvbar;
+
+    take_aarch32_exception(env, ARM_CPU_MODE_HYP, mask, 0, addr);
+}
+
 static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
 {
     ARMCPU *cpu = ARM_CPU(cs);
@@ -8108,6 +8185,11 @@ static void arm_cpu_do_interrupt_aarch32(CPUState *cs)
         env->cp15.mdscr_el1 = deposit64(env->cp15.mdscr_el1, 2, 4, moe);
     }
 
+    if (env->exception.target_el == 2) {
+        arm_cpu_do_interrupt_aarch32_hyp(cs);
+        return;
+    }
+
     /* TODO: Vectored interrupt controller.  */
     switch (cs->exception_index) {
     case EXCP_UDEF:

From 829f9fd394ab082753308cbda165c13eaf8fae49 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:38 +0100
Subject: [PATCH 17/52] target/arm: Clear CPSR.IL and CPSR.J on 32-bit
 exception entry

On 32-bit exception entry, CPSR.J must always be set to 0
(see v7A Arm ARM DDI0406C.c B1.8.5). CPSR.IL must also
be cleared on 32-bit exception entry (see v8A Arm ARM
DDI0487C.a G1.10).

Clear these bits. (This fixes a bug which will never be noticed
by non-buggy guests.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-6-peter.maydell@linaro.org
---
 target/arm/helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/target/arm/helper.c b/target/arm/helper.c
index b0353921aa..088f452716 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -8054,6 +8054,8 @@ static void take_aarch32_exception(CPUARMState *env, int new_mode,
     if (env->cp15.sctlr_el[arm_current_el(env)] & SCTLR_EE) {
         env->uncached_cpsr |= CPSR_E;
     }
+    /* J and IL must always be cleared for exception entry */
+    env->uncached_cpsr &= ~(CPSR_IL | CPSR_J);
     env->daif |= mask;
 
     if (new_mode == ARM_CPU_MODE_HYP) {

From 299953b989878d8f9ea38c7ea2d6760d49c0325e Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:39 +0100
Subject: [PATCH 18/52] hw/arm/boot: AArch32 kernels should be started in Hyp
 mode if available

The kernel booting specification for an AArch32 kernel requires that
it is booted in Hyp mode if available; otherwise the kernel can't
enable KVM. We were incorrectly leaving the kernel in SVC mode.
If we're booting an AArch32 kernel in the Nonsecure state and Hyp
mode is available, start in it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Luc Michel <luc.michel@greensocs.com>
Message-id: 20180820153020.21478-7-peter.maydell@linaro.org
---
 hw/arm/boot.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index ca9467e583..20c71d7d96 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -736,6 +736,17 @@ static void do_cpu_reset(void *opaque)
                 }
             }
 
+            if (!env->aarch64 && !info->secure_boot &&
+                arm_feature(env, ARM_FEATURE_EL2)) {
+                /*
+                 * This is an AArch32 boot not to Secure state, and
+                 * we have Hyp mode available, so boot the kernel into
+                 * Hyp mode. This is not how the CPU comes out of reset,
+                 * so we need to manually put it there.
+                 */
+                cpsr_write(env, ARM_CPU_MODE_HYP, CPSR_M, CPSRWriteRaw);
+            }
+
             if (cs == first_cpu) {
                 AddressSpace *as = arm_boot_address_space(cpu, info);
 

From a1982f90a42b22f2858e7d8497ab7223cd49b65d Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:40 +0100
Subject: [PATCH 19/52] hw/misc/mps2-fpgaio: Implement 1Hz and 100Hz counters

The MPS2 FPGAIO block includes some simple free-running counters.
Implement these.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-2-peter.maydell@linaro.org
---
 hw/misc/mps2-fpgaio.c         | 53 ++++++++++++++++++++++++++++++++++-
 include/hw/misc/mps2-fpgaio.h |  4 +++
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/hw/misc/mps2-fpgaio.c b/hw/misc/mps2-fpgaio.c
index 7394a057d8..bbc28f641f 100644
--- a/hw/misc/mps2-fpgaio.c
+++ b/hw/misc/mps2-fpgaio.c
@@ -22,6 +22,7 @@
 #include "hw/sysbus.h"
 #include "hw/registerfields.h"
 #include "hw/misc/mps2-fpgaio.h"
+#include "qemu/timer.h"
 
 REG32(LED0, 0)
 REG32(BUTTON, 8)
@@ -32,10 +33,21 @@ REG32(PRESCALE, 0x1c)
 REG32(PSCNTR, 0x20)
 REG32(MISC, 0x4c)
 
+static uint32_t counter_from_tickoff(int64_t now, int64_t tick_offset, int frq)
+{
+    return muldiv64(now - tick_offset, frq, NANOSECONDS_PER_SECOND);
+}
+
+static int64_t tickoff_from_counter(int64_t now, uint32_t count, int frq)
+{
+    return now - muldiv64(count, NANOSECONDS_PER_SECOND, frq);
+}
+
 static uint64_t mps2_fpgaio_read(void *opaque, hwaddr offset, unsigned size)
 {
     MPS2FPGAIO *s = MPS2_FPGAIO(opaque);
     uint64_t r;
+    int64_t now;
 
     switch (offset) {
     case A_LED0:
@@ -54,10 +66,15 @@ static uint64_t mps2_fpgaio_read(void *opaque, hwaddr offset, unsigned size)
         r = s->misc;
         break;
     case A_CLK1HZ:
+        now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        r = counter_from_tickoff(now, s->clk1hz_tick_offset, 1);
+        break;
     case A_CLK100HZ:
+        now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        r = counter_from_tickoff(now, s->clk100hz_tick_offset, 100);
+        break;
     case A_COUNTER:
     case A_PSCNTR:
-        /* These are all upcounters of various frequencies. */
         qemu_log_mask(LOG_UNIMP, "MPS2 FPGAIO: counters unimplemented\n");
         r = 0;
         break;
@@ -76,6 +93,7 @@ static void mps2_fpgaio_write(void *opaque, hwaddr offset, uint64_t value,
                               unsigned size)
 {
     MPS2FPGAIO *s = MPS2_FPGAIO(opaque);
+    int64_t now;
 
     trace_mps2_fpgaio_write(offset, value, size);
 
@@ -100,6 +118,14 @@ static void mps2_fpgaio_write(void *opaque, hwaddr offset, uint64_t value,
                       "MPS2 FPGAIO: MISC control bits unimplemented\n");
         s->misc = value;
         break;
+    case A_CLK1HZ:
+        now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        s->clk1hz_tick_offset = tickoff_from_counter(now, value, 1);
+        break;
+    case A_CLK100HZ:
+        now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+        s->clk100hz_tick_offset = tickoff_from_counter(now, value, 100);
+        break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "MPS2 FPGAIO write: bad offset 0x%x\n", (int) offset);
@@ -116,11 +142,14 @@ static const MemoryRegionOps mps2_fpgaio_ops = {
 static void mps2_fpgaio_reset(DeviceState *dev)
 {
     MPS2FPGAIO *s = MPS2_FPGAIO(dev);
+    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 
     trace_mps2_fpgaio_reset();
     s->led0 = 0;
     s->prescale = 0;
     s->misc = 0;
+    s->clk1hz_tick_offset = tickoff_from_counter(now, 0, 1);
+    s->clk100hz_tick_offset = tickoff_from_counter(now, 0, 100);
 }
 
 static void mps2_fpgaio_init(Object *obj)
@@ -133,6 +162,24 @@ static void mps2_fpgaio_init(Object *obj)
     sysbus_init_mmio(sbd, &s->iomem);
 }
 
+static bool mps2_fpgaio_counters_needed(void *opaque)
+{
+    /* Currently vmstate.c insists all subsections have a 'needed' function */
+    return true;
+}
+
+static const VMStateDescription mps2_fpgaio_counters_vmstate = {
+    .name = "mps2-fpgaio/counters",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = mps2_fpgaio_counters_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT64(clk1hz_tick_offset, MPS2FPGAIO),
+        VMSTATE_INT64(clk100hz_tick_offset, MPS2FPGAIO),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription mps2_fpgaio_vmstate = {
     .name = "mps2-fpgaio",
     .version_id = 1,
@@ -142,6 +189,10 @@ static const VMStateDescription mps2_fpgaio_vmstate = {
         VMSTATE_UINT32(prescale, MPS2FPGAIO),
         VMSTATE_UINT32(misc, MPS2FPGAIO),
         VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription*[]) {
+        &mps2_fpgaio_counters_vmstate,
+        NULL
     }
 };
 
diff --git a/include/hw/misc/mps2-fpgaio.h b/include/hw/misc/mps2-fpgaio.h
index eedf17ebc6..ec057d38c7 100644
--- a/include/hw/misc/mps2-fpgaio.h
+++ b/include/hw/misc/mps2-fpgaio.h
@@ -38,6 +38,10 @@ typedef struct {
     uint32_t misc;
 
     uint32_t prescale_clk;
+
+    /* These hold the CLOCK_VIRTUAL ns tick when the CLK1HZ/CLK100HZ was zero */
+    int64_t clk1hz_tick_offset;
+    int64_t clk100hz_tick_offset;
 } MPS2FPGAIO;
 
 #endif

From 93739075d28ce81ae06237b48084f26a377cdcad Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:40 +0100
Subject: [PATCH 20/52] hw/misc/mps2-fpgaio: Implement PSCNTR and COUNTER

In the MPS2 FPGAIO, PSCNTR is a free-running downcounter with
a reload value configured via the PRESCALE register, and
COUNTER counts up by 1 every time PSCNTR reaches zero.
Implement these counters.

We can just increment the counters migration subsection's
version ID because we only added it in the previous commit,
so no released QEMU versions will be using it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-3-peter.maydell@linaro.org
---
 hw/misc/mps2-fpgaio.c         | 97 +++++++++++++++++++++++++++++++++--
 include/hw/misc/mps2-fpgaio.h |  6 +++
 2 files changed, 99 insertions(+), 4 deletions(-)

diff --git a/hw/misc/mps2-fpgaio.c b/hw/misc/mps2-fpgaio.c
index bbc28f641f..5cf10ebd66 100644
--- a/hw/misc/mps2-fpgaio.c
+++ b/hw/misc/mps2-fpgaio.c
@@ -43,6 +43,77 @@ static int64_t tickoff_from_counter(int64_t now, uint32_t count, int frq)
     return now - muldiv64(count, NANOSECONDS_PER_SECOND, frq);
 }
 
+static void resync_counter(MPS2FPGAIO *s)
+{
+    /*
+     * Update s->counter and s->pscntr to their true current values
+     * by calculating how many times PSCNTR has ticked since the
+     * last time we did a resync.
+     */
+    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    int64_t elapsed = now - s->pscntr_sync_ticks;
+
+    /*
+     * Round elapsed down to a whole number of PSCNTR ticks, so we don't
+     * lose time if we do multiple resyncs in a single tick.
+     */
+    uint64_t ticks = muldiv64(elapsed, s->prescale_clk, NANOSECONDS_PER_SECOND);
+
+    /*
+     * Work out what PSCNTR and COUNTER have moved to. We assume that
+     * PSCNTR reloads from PRESCALE one tick-period after it hits zero,
+     * and that COUNTER increments at the same moment.
+     */
+    if (ticks == 0) {
+        /* We haven't ticked since the last time we were asked */
+        return;
+    } else if (ticks < s->pscntr) {
+        /* We haven't yet reached zero, just reduce the PSCNTR */
+        s->pscntr -= ticks;
+    } else {
+        if (s->prescale == 0) {
+            /*
+             * If the reload value is zero then the PSCNTR will stick
+             * at zero once it reaches it, and so we will increment
+             * COUNTER every tick after that.
+             */
+            s->counter += ticks - s->pscntr;
+            s->pscntr = 0;
+        } else {
+            /*
+             * This is the complicated bit. This ASCII art diagram gives an
+             * example with PRESCALE==5 PSCNTR==7:
+             *
+             * ticks  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14
+             * PSCNTR 7  6  5  4  3  2  1  0  5  4  3  2  1  0  5
+             * cinc                           1                 2
+             * y            0  1  2  3  4  5  6  7  8  9 10 11 12
+             * x            0  1  2  3  4  5  0  1  2  3  4  5  0
+             *
+             * where x = y % (s->prescale + 1)
+             * and so PSCNTR = s->prescale - x
+             * and COUNTER is incremented by y / (s->prescale + 1)
+             *
+             * The case where PSCNTR < PRESCALE works out the same,
+             * though we must be careful to calculate y as 64-bit unsigned
+             * for all parts of the expression.
+             * y < 0 is not possible because that implies ticks < s->pscntr.
+             */
+            uint64_t y = ticks - s->pscntr + s->prescale;
+            s->pscntr = s->prescale - (y % (s->prescale + 1));
+            s->counter += y / (s->prescale + 1);
+        }
+    }
+
+    /*
+     * Only advance the sync time to the timestamp of the last PSCNTR tick,
+     * not all the way to 'now', so we don't lose time if we do multiple
+     * resyncs in a single tick.
+     */
+    s->pscntr_sync_ticks += muldiv64(ticks, NANOSECONDS_PER_SECOND,
+                                     s->prescale_clk);
+}
+
 static uint64_t mps2_fpgaio_read(void *opaque, hwaddr offset, unsigned size)
 {
     MPS2FPGAIO *s = MPS2_FPGAIO(opaque);
@@ -74,9 +145,12 @@ static uint64_t mps2_fpgaio_read(void *opaque, hwaddr offset, unsigned size)
         r = counter_from_tickoff(now, s->clk100hz_tick_offset, 100);
         break;
     case A_COUNTER:
+        resync_counter(s);
+        r = s->counter;
+        break;
     case A_PSCNTR:
-        qemu_log_mask(LOG_UNIMP, "MPS2 FPGAIO: counters unimplemented\n");
-        r = 0;
+        resync_counter(s);
+        r = s->pscntr;
         break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
@@ -107,6 +181,7 @@ static void mps2_fpgaio_write(void *opaque, hwaddr offset, uint64_t value,
         s->led0 = value & 0x3;
         break;
     case A_PRESCALE:
+        resync_counter(s);
         s->prescale = value;
         break;
     case A_MISC:
@@ -126,6 +201,14 @@ static void mps2_fpgaio_write(void *opaque, hwaddr offset, uint64_t value,
         now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
         s->clk100hz_tick_offset = tickoff_from_counter(now, value, 100);
         break;
+    case A_COUNTER:
+        resync_counter(s);
+        s->counter = value;
+        break;
+    case A_PSCNTR:
+        resync_counter(s);
+        s->pscntr = value;
+        break;
     default:
         qemu_log_mask(LOG_GUEST_ERROR,
                       "MPS2 FPGAIO write: bad offset 0x%x\n", (int) offset);
@@ -150,6 +233,9 @@ static void mps2_fpgaio_reset(DeviceState *dev)
     s->misc = 0;
     s->clk1hz_tick_offset = tickoff_from_counter(now, 0, 1);
     s->clk100hz_tick_offset = tickoff_from_counter(now, 0, 100);
+    s->counter = 0;
+    s->pscntr = 0;
+    s->pscntr_sync_ticks = now;
 }
 
 static void mps2_fpgaio_init(Object *obj)
@@ -170,12 +256,15 @@ static bool mps2_fpgaio_counters_needed(void *opaque)
 
 static const VMStateDescription mps2_fpgaio_counters_vmstate = {
     .name = "mps2-fpgaio/counters",
-    .version_id = 1,
-    .minimum_version_id = 1,
+    .version_id = 2,
+    .minimum_version_id = 2,
     .needed = mps2_fpgaio_counters_needed,
     .fields = (VMStateField[]) {
         VMSTATE_INT64(clk1hz_tick_offset, MPS2FPGAIO),
         VMSTATE_INT64(clk100hz_tick_offset, MPS2FPGAIO),
+        VMSTATE_UINT32(counter, MPS2FPGAIO),
+        VMSTATE_UINT32(pscntr, MPS2FPGAIO),
+        VMSTATE_INT64(pscntr_sync_ticks, MPS2FPGAIO),
         VMSTATE_END_OF_LIST()
     }
 };
diff --git a/include/hw/misc/mps2-fpgaio.h b/include/hw/misc/mps2-fpgaio.h
index ec057d38c7..69e265cd4b 100644
--- a/include/hw/misc/mps2-fpgaio.h
+++ b/include/hw/misc/mps2-fpgaio.h
@@ -37,6 +37,12 @@ typedef struct {
     uint32_t prescale;
     uint32_t misc;
 
+    /* QEMU_CLOCK_VIRTUAL time at which counter and pscntr were last synced */
+    int64_t pscntr_sync_ticks;
+    /* Values of COUNTER and PSCNTR at time pscntr_sync_ticks */
+    uint32_t counter;
+    uint32_t pscntr;
+
     uint32_t prescale_clk;
 
     /* These hold the CLOCK_VIRTUAL ns tick when the CLK1HZ/CLK100HZ was zero */

From 4f4c6206ca6eda478ec0377545ce26eb41090672 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:41 +0100
Subject: [PATCH 21/52] hw/timer/cmsdk-apb-dualtimer: Implement CMSDK dual
 timer module

The Arm Cortex-M System Design Kit includes a "dual-input timer module"
which combines two programmable down-counters. Implement a model
of this device.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-4-peter.maydell@linaro.org
---
 MAINTAINERS                            |   2 +
 default-configs/arm-softmmu.mak        |   1 +
 hw/timer/Makefile.objs                 |   1 +
 hw/timer/cmsdk-apb-dualtimer.c         | 515 +++++++++++++++++++++++++
 hw/timer/trace-events                  |   5 +
 include/hw/timer/cmsdk-apb-dualtimer.h |  72 ++++
 6 files changed, 596 insertions(+)
 create mode 100644 hw/timer/cmsdk-apb-dualtimer.c
 create mode 100644 include/hw/timer/cmsdk-apb-dualtimer.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 68bc92eef9..dc207e3fe7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -455,6 +455,8 @@ F: hw/timer/pl031.c
 F: include/hw/arm/primecell.h
 F: hw/timer/cmsdk-apb-timer.c
 F: include/hw/timer/cmsdk-apb-timer.h
+F: hw/timer/cmsdk-apb-dualtimer.c
+F: include/hw/timer/cmsdk-apb-dualtimer.h
 F: hw/char/cmsdk-apb-uart.c
 F: include/hw/char/cmsdk-apb-uart.h
 F: hw/watchdog/cmsdk-apb-watchdog.c
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index a92bc34fb2..c8137a5d3c 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -103,6 +103,7 @@ CONFIG_STM32F2XX_SPI=y
 CONFIG_STM32F205_SOC=y
 
 CONFIG_CMSDK_APB_TIMER=y
+CONFIG_CMSDK_APB_DUALTIMER=y
 CONFIG_CMSDK_APB_UART=y
 CONFIG_CMSDK_APB_WATCHDOG=y
 
diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs
index e16b2b913c..b32194d153 100644
--- a/hw/timer/Makefile.objs
+++ b/hw/timer/Makefile.objs
@@ -44,4 +44,5 @@ common-obj-$(CONFIG_ASPEED_SOC) += aspeed_timer.o
 
 common-obj-$(CONFIG_SUN4V_RTC) += sun4v-rtc.o
 common-obj-$(CONFIG_CMSDK_APB_TIMER) += cmsdk-apb-timer.o
+common-obj-$(CONFIG_CMSDK_APB_DUALTIMER) += cmsdk-apb-dualtimer.o
 common-obj-$(CONFIG_MSF2) += mss-timer.o
diff --git a/hw/timer/cmsdk-apb-dualtimer.c b/hw/timer/cmsdk-apb-dualtimer.c
new file mode 100644
index 0000000000..ccd49753b7
--- /dev/null
+++ b/hw/timer/cmsdk-apb-dualtimer.c
@@ -0,0 +1,515 @@
+/*
+ * ARM CMSDK APB dual-timer emulation
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "APB dual-input timer" which is part of the Cortex-M
+ * System Design Kit (CMSDK) and documented in the Cortex-M System
+ * Design Kit Technical Reference Manual (ARM DDI0479C):
+ * https://developer.arm.com/products/system-design/system-design-kits/cortex-m-system-design-kit
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "qemu/main-loop.h"
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "hw/timer/cmsdk-apb-dualtimer.h"
+
+REG32(TIMER1LOAD, 0x0)
+REG32(TIMER1VALUE, 0x4)
+REG32(TIMER1CONTROL, 0x8)
+    FIELD(CONTROL, ONESHOT, 0, 1)
+    FIELD(CONTROL, SIZE, 1, 1)
+    FIELD(CONTROL, PRESCALE, 2, 2)
+    FIELD(CONTROL, INTEN, 5, 1)
+    FIELD(CONTROL, MODE, 6, 1)
+    FIELD(CONTROL, ENABLE, 7, 1)
+#define R_CONTROL_VALID_MASK (R_CONTROL_ONESHOT_MASK | R_CONTROL_SIZE_MASK | \
+                              R_CONTROL_PRESCALE_MASK | R_CONTROL_INTEN_MASK | \
+                              R_CONTROL_MODE_MASK | R_CONTROL_ENABLE_MASK)
+REG32(TIMER1INTCLR, 0xc)
+REG32(TIMER1RIS, 0x10)
+REG32(TIMER1MIS, 0x14)
+REG32(TIMER1BGLOAD, 0x18)
+REG32(TIMER2LOAD, 0x20)
+REG32(TIMER2VALUE, 0x24)
+REG32(TIMER2CONTROL, 0x28)
+REG32(TIMER2INTCLR, 0x2c)
+REG32(TIMER2RIS, 0x30)
+REG32(TIMER2MIS, 0x34)
+REG32(TIMER2BGLOAD, 0x38)
+REG32(TIMERITCR, 0xf00)
+    FIELD(TIMERITCR, ENABLE, 0, 1)
+#define R_TIMERITCR_VALID_MASK R_TIMERITCR_ENABLE_MASK
+REG32(TIMERITOP, 0xf04)
+    FIELD(TIMERITOP, TIMINT1, 0, 1)
+    FIELD(TIMERITOP, TIMINT2, 1, 1)
+#define R_TIMERITOP_VALID_MASK (R_TIMERITOP_TIMINT1_MASK | \
+                                R_TIMERITOP_TIMINT2_MASK)
+REG32(PID4, 0xfd0)
+REG32(PID5, 0xfd4)
+REG32(PID6, 0xfd8)
+REG32(PID7, 0xfdc)
+REG32(PID0, 0xfe0)
+REG32(PID1, 0xfe4)
+REG32(PID2, 0xfe8)
+REG32(PID3, 0xfec)
+REG32(CID0, 0xff0)
+REG32(CID1, 0xff4)
+REG32(CID2, 0xff8)
+REG32(CID3, 0xffc)
+
+/* PID/CID values */
+static const int timer_id[] = {
+    0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
+    0x23, 0xb8, 0x1b, 0x00, /* PID0..PID3 */
+    0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
+};
+
+static bool cmsdk_dualtimermod_intstatus(CMSDKAPBDualTimerModule *m)
+{
+    /* Return masked interrupt status for the timer module */
+    return m->intstatus && (m->control & R_CONTROL_INTEN_MASK);
+}
+
+static void cmsdk_apb_dualtimer_update(CMSDKAPBDualTimer *s)
+{
+    bool timint1, timint2, timintc;
+
+    if (s->timeritcr) {
+        /* Integration test mode: outputs driven directly from TIMERITOP bits */
+        timint1 = s->timeritop & R_TIMERITOP_TIMINT1_MASK;
+        timint2 = s->timeritop & R_TIMERITOP_TIMINT2_MASK;
+    } else {
+        timint1 = cmsdk_dualtimermod_intstatus(&s->timermod[0]);
+        timint2 = cmsdk_dualtimermod_intstatus(&s->timermod[1]);
+    }
+
+    timintc = timint1 || timint2;
+
+    qemu_set_irq(s->timermod[0].timerint, timint1);
+    qemu_set_irq(s->timermod[1].timerint, timint2);
+    qemu_set_irq(s->timerintc, timintc);
+}
+
+static void cmsdk_dualtimermod_write_control(CMSDKAPBDualTimerModule *m,
+                                             uint32_t newctrl)
+{
+    /* Handle a write to the CONTROL register */
+    uint32_t changed;
+
+    newctrl &= R_CONTROL_VALID_MASK;
+
+    changed = m->control ^ newctrl;
+
+    if (changed & ~newctrl & R_CONTROL_ENABLE_MASK) {
+        /* ENABLE cleared, stop timer before any further changes */
+        ptimer_stop(m->timer);
+    }
+
+    if (changed & R_CONTROL_PRESCALE_MASK) {
+        int divisor;
+
+        switch (FIELD_EX32(newctrl, CONTROL, PRESCALE)) {
+        case 0:
+            divisor = 1;
+            break;
+        case 1:
+            divisor = 16;
+            break;
+        case 2:
+            divisor = 256;
+            break;
+        case 3:
+            /* UNDEFINED; complain, and arbitrarily treat like 2 */
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "CMSDK APB dual-timer: CONTROL.PRESCALE==0b11"
+                          " is undefined behaviour\n");
+            divisor = 256;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+        ptimer_set_freq(m->timer, m->parent->pclk_frq / divisor);
+    }
+
+    if (changed & R_CONTROL_MODE_MASK) {
+        uint32_t load;
+        if (newctrl & R_CONTROL_MODE_MASK) {
+            /* Periodic: the limit is the LOAD register value */
+            load = m->load;
+        } else {
+            /* Free-running: counter wraps around */
+            load = ptimer_get_limit(m->timer);
+            if (!(m->control & R_CONTROL_SIZE_MASK)) {
+                load = deposit32(m->load, 0, 16, load);
+            }
+            m->load = load;
+            load = 0xffffffff;
+        }
+        if (!(m->control & R_CONTROL_SIZE_MASK)) {
+            load &= 0xffff;
+        }
+        ptimer_set_limit(m->timer, load, 0);
+    }
+
+    if (changed & R_CONTROL_SIZE_MASK) {
+        /* Timer switched between 16 and 32 bit count */
+        uint32_t value, load;
+
+        value = ptimer_get_count(m->timer);
+        load = ptimer_get_limit(m->timer);
+        if (newctrl & R_CONTROL_SIZE_MASK) {
+            /* 16 -> 32, top half of VALUE is in struct field */
+            value = deposit32(m->value, 0, 16, value);
+        } else {
+            /* 32 -> 16: save top half to struct field and truncate */
+            m->value = value;
+            value &= 0xffff;
+        }
+
+        if (newctrl & R_CONTROL_MODE_MASK) {
+            /* Periodic, timer limit has LOAD value */
+            if (newctrl & R_CONTROL_SIZE_MASK) {
+                load = deposit32(m->load, 0, 16, load);
+            } else {
+                m->load = load;
+                load &= 0xffff;
+            }
+        } else {
+            /* Free-running, timer limit is set to give wraparound */
+            if (newctrl & R_CONTROL_SIZE_MASK) {
+                load = 0xffffffff;
+            } else {
+                load = 0xffff;
+            }
+        }
+        ptimer_set_count(m->timer, value);
+        ptimer_set_limit(m->timer, load, 0);
+    }
+
+    if (newctrl & R_CONTROL_ENABLE_MASK) {
+        /*
+         * ENABLE is set; start the timer after all other changes.
+         * We start it even if the ENABLE bit didn't actually change,
+         * in case the timer was an expired one-shot timer that has
+         * now been changed into a free-running or periodic timer.
+         */
+        ptimer_run(m->timer, !!(newctrl & R_CONTROL_ONESHOT_MASK));
+    }
+
+    m->control = newctrl;
+}
+
+static uint64_t cmsdk_apb_dualtimer_read(void *opaque, hwaddr offset,
+                                          unsigned size)
+{
+    CMSDKAPBDualTimer *s = CMSDK_APB_DUALTIMER(opaque);
+    uint64_t r;
+
+    if (offset >= A_TIMERITCR) {
+        switch (offset) {
+        case A_TIMERITCR:
+            r = s->timeritcr;
+            break;
+        case A_PID4 ... A_CID3:
+            r = timer_id[(offset - A_PID4) / 4];
+            break;
+        default:
+        bad_offset:
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "CMSDK APB dual-timer read: bad offset %x\n",
+                          (int) offset);
+            r = 0;
+            break;
+        }
+    } else {
+        int timer = offset >> 5;
+        CMSDKAPBDualTimerModule *m;
+
+        if (timer >= ARRAY_SIZE(s->timermod)) {
+            goto bad_offset;
+        }
+
+        m = &s->timermod[timer];
+
+        switch (offset & 0x1F) {
+        case A_TIMER1LOAD:
+        case A_TIMER1BGLOAD:
+            if (m->control & R_CONTROL_MODE_MASK) {
+                /*
+                 * Periodic: the ptimer limit is the LOAD register value, (or
+                 * just the low 16 bits of it if the timer is in 16-bit mode)
+                 */
+                r = ptimer_get_limit(m->timer);
+                if (!(m->control & R_CONTROL_SIZE_MASK)) {
+                    r = deposit32(m->load, 0, 16, r);
+                }
+            } else {
+                /* Free-running: LOAD register value is just in m->load */
+                r = m->load;
+            }
+            break;
+        case A_TIMER1VALUE:
+            r = ptimer_get_count(m->timer);
+            if (!(m->control & R_CONTROL_SIZE_MASK)) {
+                r = deposit32(m->value, 0, 16, r);
+            }
+            break;
+        case A_TIMER1CONTROL:
+            r = m->control;
+            break;
+        case A_TIMER1RIS:
+            r = m->intstatus;
+            break;
+        case A_TIMER1MIS:
+            r = cmsdk_dualtimermod_intstatus(m);
+            break;
+        default:
+            goto bad_offset;
+        }
+    }
+
+    trace_cmsdk_apb_dualtimer_read(offset, r, size);
+    return r;
+}
+
+static void cmsdk_apb_dualtimer_write(void *opaque, hwaddr offset,
+                                       uint64_t value, unsigned size)
+{
+    CMSDKAPBDualTimer *s = CMSDK_APB_DUALTIMER(opaque);
+
+    trace_cmsdk_apb_dualtimer_write(offset, value, size);
+
+    if (offset >= A_TIMERITCR) {
+        switch (offset) {
+        case A_TIMERITCR:
+            s->timeritcr = value & R_TIMERITCR_VALID_MASK;
+            cmsdk_apb_dualtimer_update(s);
+        case A_TIMERITOP:
+            s->timeritop = value & R_TIMERITOP_VALID_MASK;
+            cmsdk_apb_dualtimer_update(s);
+        default:
+        bad_offset:
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "CMSDK APB dual-timer write: bad offset %x\n",
+                          (int) offset);
+            break;
+        }
+    } else {
+        int timer = offset >> 5;
+        CMSDKAPBDualTimerModule *m;
+
+        if (timer >= ARRAY_SIZE(s->timermod)) {
+            goto bad_offset;
+        }
+
+        m = &s->timermod[timer];
+
+        switch (offset & 0x1F) {
+        case A_TIMER1LOAD:
+            /* Set the limit, and immediately reload the count from it */
+            m->load = value;
+            m->value = value;
+            if (!(m->control & R_CONTROL_SIZE_MASK)) {
+                value &= 0xffff;
+            }
+            if (!(m->control & R_CONTROL_MODE_MASK)) {
+                /*
+                 * In free-running mode this won't set the limit but will
+                 * still change the current count value.
+                 */
+                ptimer_set_count(m->timer, value);
+            } else {
+                if (!value) {
+                    ptimer_stop(m->timer);
+                }
+                ptimer_set_limit(m->timer, value, 1);
+                if (value && (m->control & R_CONTROL_ENABLE_MASK)) {
+                    /* Force possibly-expired oneshot timer to restart */
+                    ptimer_run(m->timer, 1);
+                }
+            }
+            break;
+        case A_TIMER1BGLOAD:
+            /* Set the limit, but not the current count */
+            m->load = value;
+            if (!(m->control & R_CONTROL_MODE_MASK)) {
+                /* In free-running mode there is no limit */
+                break;
+            }
+            if (!(m->control & R_CONTROL_SIZE_MASK)) {
+                value &= 0xffff;
+            }
+            ptimer_set_limit(m->timer, value, 0);
+            break;
+        case A_TIMER1CONTROL:
+            cmsdk_dualtimermod_write_control(m, value);
+            cmsdk_apb_dualtimer_update(s);
+            break;
+        case A_TIMER1INTCLR:
+            m->intstatus = 0;
+            cmsdk_apb_dualtimer_update(s);
+            break;
+        default:
+            goto bad_offset;
+        }
+    }
+}
+
+static const MemoryRegionOps cmsdk_apb_dualtimer_ops = {
+    .read = cmsdk_apb_dualtimer_read,
+    .write = cmsdk_apb_dualtimer_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    /* byte/halfword accesses are just zero-padded on reads and writes */
+    .impl.min_access_size = 4,
+    .impl.max_access_size = 4,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
+};
+
+static void cmsdk_dualtimermod_tick(void *opaque)
+{
+    CMSDKAPBDualTimerModule *m = opaque;
+
+    m->intstatus = 1;
+    cmsdk_apb_dualtimer_update(m->parent);
+}
+
+static void cmsdk_dualtimermod_reset(CMSDKAPBDualTimerModule *m)
+{
+    m->control = R_CONTROL_INTEN_MASK;
+    m->intstatus = 0;
+    m->load = 0;
+    m->value = 0xffffffff;
+    ptimer_stop(m->timer);
+    /*
+     * We start in free-running mode, with VALUE at 0xffffffff, and
+     * in 16-bit counter mode. This means that the ptimer count and
+     * limit must both be set to 0xffff, so we wrap at 16 bits.
+     */
+    ptimer_set_limit(m->timer, 0xffff, 1);
+    ptimer_set_freq(m->timer, m->parent->pclk_frq);
+}
+
+static void cmsdk_apb_dualtimer_reset(DeviceState *dev)
+{
+    CMSDKAPBDualTimer *s = CMSDK_APB_DUALTIMER(dev);
+    int i;
+
+    trace_cmsdk_apb_dualtimer_reset();
+
+    for (i = 0; i < ARRAY_SIZE(s->timermod); i++) {
+        cmsdk_dualtimermod_reset(&s->timermod[i]);
+    }
+    s->timeritcr = 0;
+    s->timeritop = 0;
+}
+
+static void cmsdk_apb_dualtimer_init(Object *obj)
+{
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    CMSDKAPBDualTimer *s = CMSDK_APB_DUALTIMER(obj);
+    int i;
+
+    memory_region_init_io(&s->iomem, obj, &cmsdk_apb_dualtimer_ops,
+                          s, "cmsdk-apb-dualtimer", 0x1000);
+    sysbus_init_mmio(sbd, &s->iomem);
+    sysbus_init_irq(sbd, &s->timerintc);
+
+    for (i = 0; i < ARRAY_SIZE(s->timermod); i++) {
+        sysbus_init_irq(sbd, &s->timermod[i].timerint);
+    }
+}
+
+static void cmsdk_apb_dualtimer_realize(DeviceState *dev, Error **errp)
+{
+    CMSDKAPBDualTimer *s = CMSDK_APB_DUALTIMER(dev);
+    int i;
+
+    if (s->pclk_frq == 0) {
+        error_setg(errp, "CMSDK APB timer: pclk-frq property must be set");
+        return;
+    }
+
+    for (i = 0; i < ARRAY_SIZE(s->timermod); i++) {
+        CMSDKAPBDualTimerModule *m = &s->timermod[i];
+        QEMUBH *bh = qemu_bh_new(cmsdk_dualtimermod_tick, m);
+
+        m->parent = s;
+        m->timer = ptimer_init(bh,
+                               PTIMER_POLICY_WRAP_AFTER_ONE_PERIOD |
+                               PTIMER_POLICY_TRIGGER_ONLY_ON_DECREMENT |
+                               PTIMER_POLICY_NO_IMMEDIATE_RELOAD |
+                               PTIMER_POLICY_NO_COUNTER_ROUND_DOWN);
+    }
+}
+
+static const VMStateDescription cmsdk_dualtimermod_vmstate = {
+    .name = "cmsdk-apb-dualtimer-module",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_PTIMER(timer, CMSDKAPBDualTimerModule),
+        VMSTATE_UINT32(load, CMSDKAPBDualTimerModule),
+        VMSTATE_UINT32(value, CMSDKAPBDualTimerModule),
+        VMSTATE_UINT32(control, CMSDKAPBDualTimerModule),
+        VMSTATE_UINT32(intstatus, CMSDKAPBDualTimerModule),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription cmsdk_apb_dualtimer_vmstate = {
+    .name = "cmsdk-apb-dualtimer",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_STRUCT_ARRAY(timermod, CMSDKAPBDualTimer,
+                             CMSDK_APB_DUALTIMER_NUM_MODULES,
+                             1, cmsdk_dualtimermod_vmstate,
+                             CMSDKAPBDualTimerModule),
+        VMSTATE_UINT32(timeritcr, CMSDKAPBDualTimer),
+        VMSTATE_UINT32(timeritop, CMSDKAPBDualTimer),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property cmsdk_apb_dualtimer_properties[] = {
+    DEFINE_PROP_UINT32("pclk-frq", CMSDKAPBDualTimer, pclk_frq, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void cmsdk_apb_dualtimer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = cmsdk_apb_dualtimer_realize;
+    dc->vmsd = &cmsdk_apb_dualtimer_vmstate;
+    dc->reset = cmsdk_apb_dualtimer_reset;
+    dc->props = cmsdk_apb_dualtimer_properties;
+}
+
+static const TypeInfo cmsdk_apb_dualtimer_info = {
+    .name = TYPE_CMSDK_APB_DUALTIMER,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(CMSDKAPBDualTimer),
+    .instance_init = cmsdk_apb_dualtimer_init,
+    .class_init = cmsdk_apb_dualtimer_class_init,
+};
+
+static void cmsdk_apb_dualtimer_register_types(void)
+{
+    type_register_static(&cmsdk_apb_dualtimer_info);
+}
+
+type_init(cmsdk_apb_dualtimer_register_types);
diff --git a/hw/timer/trace-events b/hw/timer/trace-events
index e6e042fddb..fa4213df5b 100644
--- a/hw/timer/trace-events
+++ b/hw/timer/trace-events
@@ -61,5 +61,10 @@ cmsdk_apb_timer_read(uint64_t offset, uint64_t data, unsigned size) "CMSDK APB t
 cmsdk_apb_timer_write(uint64_t offset, uint64_t data, unsigned size) "CMSDK APB timer write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
 cmsdk_apb_timer_reset(void) "CMSDK APB timer: reset"
 
+# hw/timer/cmsdk_apb_dualtimer.c
+cmsdk_apb_dualtimer_read(uint64_t offset, uint64_t data, unsigned size) "CMSDK APB dualtimer read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+cmsdk_apb_dualtimer_write(uint64_t offset, uint64_t data, unsigned size) "CMSDK APB dualtimer write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+cmsdk_apb_dualtimer_reset(void) "CMSDK APB dualtimer: reset"
+
 # hw/timer/xlnx-zynqmp-rtc.c
 xlnx_zynqmp_rtc_gettime(int year, int month, int day, int hour, int min, int sec) "Get time from host: %d-%d-%d %2d:%02d:%02d"
diff --git a/include/hw/timer/cmsdk-apb-dualtimer.h b/include/hw/timer/cmsdk-apb-dualtimer.h
new file mode 100644
index 0000000000..9843a9dbb1
--- /dev/null
+++ b/include/hw/timer/cmsdk-apb-dualtimer.h
@@ -0,0 +1,72 @@
+/*
+ * ARM CMSDK APB dual-timer emulation
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "APB dual-input timer" which is part of the Cortex-M
+ * System Design Kit (CMSDK) and documented in the Cortex-M System
+ * Design Kit Technical Reference Manual (ARM DDI0479C):
+ * https://developer.arm.com/products/system-design/system-design-kits/cortex-m-system-design-kit
+ *
+ * QEMU interface:
+ *  + QOM property "pclk-frq": frequency at which the timer is clocked
+ *  + sysbus MMIO region 0: the register bank
+ *  + sysbus IRQ 0: combined timer interrupt TIMINTC
+ *  + sysbus IRO 1: timer block 1 interrupt TIMINT1
+ *  + sysbus IRQ 2: timer block 2 interrupt TIMINT2
+ */
+
+#ifndef CMSDK_APB_DUALTIMER_H
+#define CMSDK_APB_DUALTIMER_H
+
+#include "hw/sysbus.h"
+#include "hw/ptimer.h"
+
+#define TYPE_CMSDK_APB_DUALTIMER "cmsdk-apb-dualtimer"
+#define CMSDK_APB_DUALTIMER(obj) OBJECT_CHECK(CMSDKAPBDualTimer, (obj), \
+                                              TYPE_CMSDK_APB_DUALTIMER)
+
+typedef struct CMSDKAPBDualTimer CMSDKAPBDualTimer;
+
+/* One of the two identical timer modules in the dual-timer module */
+typedef struct CMSDKAPBDualTimerModule {
+    CMSDKAPBDualTimer *parent;
+    struct ptimer_state *timer;
+    qemu_irq timerint;
+    /*
+     * We must track the guest LOAD and VALUE register state by hand
+     * rather than leaving this state only in the ptimer limit/count,
+     * because if CONTROL.SIZE is 0 then only the low 16 bits of the
+     * counter actually counts, but the high half is still guest
+     * accessible.
+     */
+    uint32_t load;
+    uint32_t value;
+    uint32_t control;
+    uint32_t intstatus;
+} CMSDKAPBDualTimerModule;
+
+#define CMSDK_APB_DUALTIMER_NUM_MODULES 2
+
+struct CMSDKAPBDualTimer {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    MemoryRegion iomem;
+    qemu_irq timerintc;
+    uint32_t pclk_frq;
+
+    CMSDKAPBDualTimerModule timermod[CMSDK_APB_DUALTIMER_NUM_MODULES];
+    uint32_t timeritcr;
+    uint32_t timeritop;
+};
+
+#endif

From 017d069d20866ed50f3422ade69d6cb60ea7522b Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:41 +0100
Subject: [PATCH 22/52] hw/arm/iotkit: Wire up the dualtimer
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Now we have a model of the CMSDK dual timer, we can wire it
up in the IoTKit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-5-peter.maydell@linaro.org
---
 hw/arm/iotkit.c         | 8 +++++---
 include/hw/arm/iotkit.h | 3 ++-
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
index 8cadc8b160..130d013909 100644
--- a/hw/arm/iotkit.c
+++ b/hw/arm/iotkit.c
@@ -139,7 +139,7 @@ static void iotkit_init(Object *obj)
     sysbus_init_child_obj(obj, "timer1", &s->timer1, sizeof(s->timer1),
                           TYPE_CMSDK_APB_TIMER);
     sysbus_init_child_obj(obj, "dualtimer", &s->dualtimer, sizeof(s->dualtimer),
-                          TYPE_UNIMPLEMENTED_DEVICE);
+                          TYPE_CMSDK_APB_DUALTIMER);
     object_initialize_child(obj, "ppc-irq-orgate", &s->ppc_irq_orgate,
                             sizeof(s->ppc_irq_orgate), TYPE_OR_IRQ,
                             &error_abort, NULL);
@@ -390,13 +390,15 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    qdev_prop_set_string(DEVICE(&s->dualtimer), "name", "Dual timer");
-    qdev_prop_set_uint64(DEVICE(&s->dualtimer), "size", 0x1000);
+
+    qdev_prop_set_uint32(DEVICE(&s->dualtimer), "pclk-frq", s->mainclk_frq);
     object_property_set_bool(OBJECT(&s->dualtimer), true, "realized", &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->dualtimer), 0,
+                       qdev_get_gpio_in(DEVICE(&s->armv7m), 5));
     mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dualtimer), 0);
     object_property_set_link(OBJECT(&s->apb_ppc0), OBJECT(mr), "port[2]", &err);
     if (err) {
diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
index 2cddde55dd..3e6d806e35 100644
--- a/include/hw/arm/iotkit.h
+++ b/include/hw/arm/iotkit.h
@@ -56,6 +56,7 @@
 #include "hw/misc/tz-ppc.h"
 #include "hw/misc/tz-mpc.h"
 #include "hw/timer/cmsdk-apb-timer.h"
+#include "hw/timer/cmsdk-apb-dualtimer.h"
 #include "hw/misc/unimp.h"
 #include "hw/or-irq.h"
 #include "hw/core/split-irq.h"
@@ -87,7 +88,7 @@ typedef struct IoTKit {
     SplitIRQ mpc_irq_splitter[IOTS_NUM_EXP_MPC + IOTS_NUM_MPC];
     qemu_or_irq mpc_irq_orgate;
 
-    UnimplementedDeviceState dualtimer;
+    CMSDKAPBDualTimer dualtimer;
     UnimplementedDeviceState s32ktimer;
 
     MemoryRegion container;

From 595c786b53b2cb515c2d5c1c7f2cc8c9d1721a80 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:42 +0100
Subject: [PATCH 23/52] hw/arm/mps2: Wire up dual-timer in mps2-an385 and
 mps2-an511
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The MPS2 FPGA images for the Cortex-M3 (mps2-an385 and mps2-511)
both include a CMSDK dual-timer module. Wire this up.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-6-peter.maydell@linaro.org
---
 hw/arm/mps2.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 0a0ae867d9..564624629d 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -34,6 +34,7 @@
 #include "hw/misc/unimp.h"
 #include "hw/char/cmsdk-apb-uart.h"
 #include "hw/timer/cmsdk-apb-timer.h"
+#include "hw/timer/cmsdk-apb-dualtimer.h"
 #include "hw/misc/mps2-scc.h"
 #include "hw/devices.h"
 #include "net/net.h"
@@ -64,6 +65,7 @@ typedef struct {
     MemoryRegion blockram_m3;
     MemoryRegion sram;
     MPS2SCC scc;
+    CMSDKAPBDualTimer dualtimer;
 } MPS2MachineState;
 
 #define TYPE_MPS2_MACHINE "mps2"
@@ -297,6 +299,15 @@ static void mps2_common_init(MachineState *machine)
     cmsdk_apb_timer_create(0x40000000, qdev_get_gpio_in(armv7m, 8), SYSCLK_FRQ);
     cmsdk_apb_timer_create(0x40001000, qdev_get_gpio_in(armv7m, 9), SYSCLK_FRQ);
 
+    sysbus_init_child_obj(OBJECT(mms), "dualtimer", &mms->dualtimer,
+                          sizeof(mms->dualtimer), TYPE_CMSDK_APB_DUALTIMER);
+    qdev_prop_set_uint32(DEVICE(&mms->dualtimer), "pclk-frq", SYSCLK_FRQ);
+    object_property_set_bool(OBJECT(&mms->dualtimer), true, "realized",
+                             &error_fatal);
+    sysbus_connect_irq(SYS_BUS_DEVICE(&mms->dualtimer), 0,
+                       qdev_get_gpio_in(armv7m, 10));
+    sysbus_mmio_map(SYS_BUS_DEVICE(&mms->dualtimer), 0, 0x40002000);
+
     object_initialize(&mms->scc, sizeof(mms->scc), TYPE_MPS2_SCC);
     sccdev = DEVICE(&mms->scc);
     qdev_set_parent_bus(sccdev, sysbus_get_default());

From d61e4e1ff721ff8ab611f8a81442f8af192c0961 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:42 +0100
Subject: [PATCH 24/52] hw/arm/iotkit: Wire up the watchdogs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The IoTKit includes three different instances of the
CMSDK APB watchdog; create and wire them up.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-7-peter.maydell@linaro.org
---
 hw/arm/iotkit.c         | 58 ++++++++++++++++++++++++++++++++++++++---
 include/hw/arm/iotkit.h |  6 +++++
 2 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
index 130d013909..5cedfa0357 100644
--- a/hw/arm/iotkit.c
+++ b/hw/arm/iotkit.c
@@ -19,6 +19,9 @@
 #include "hw/misc/unimp.h"
 #include "hw/arm/arm.h"
 
+/* Clock frequency in HZ of the 32KHz "slow clock" */
+#define S32KCLK (32 * 1000)
+
 /* Create an alias region of @size bytes starting at @base
  * which mirrors the memory starting at @orig.
  */
@@ -140,6 +143,15 @@ static void iotkit_init(Object *obj)
                           TYPE_CMSDK_APB_TIMER);
     sysbus_init_child_obj(obj, "dualtimer", &s->dualtimer, sizeof(s->dualtimer),
                           TYPE_CMSDK_APB_DUALTIMER);
+    sysbus_init_child_obj(obj, "s32kwatchdog", &s->s32kwatchdog,
+                          sizeof(s->s32kwatchdog), TYPE_CMSDK_APB_WATCHDOG);
+    sysbus_init_child_obj(obj, "nswatchdog", &s->nswatchdog,
+                          sizeof(s->nswatchdog), TYPE_CMSDK_APB_WATCHDOG);
+    sysbus_init_child_obj(obj, "swatchdog", &s->swatchdog,
+                          sizeof(s->swatchdog), TYPE_CMSDK_APB_WATCHDOG);
+    object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate,
+                            sizeof(s->nmi_orgate), TYPE_OR_IRQ,
+                            &error_abort, NULL);
     object_initialize_child(obj, "ppc-irq-orgate", &s->ppc_irq_orgate,
                             sizeof(s->ppc_irq_orgate), TYPE_OR_IRQ,
                             &error_abort, NULL);
@@ -510,12 +522,52 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("SYSINFO", 0x40020000, 0x1000);
 
     create_unimplemented_device("SYSCONTROL", 0x50021000, 0x1000);
-    create_unimplemented_device("S32KWATCHDOG", 0x5002e000, 0x1000);
+
+    /* This OR gate wires together outputs from the secure watchdogs to NMI */
+    object_property_set_int(OBJECT(&s->nmi_orgate), 2, "num-lines", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    object_property_set_bool(OBJECT(&s->nmi_orgate), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    qdev_connect_gpio_out(DEVICE(&s->nmi_orgate), 0,
+                          qdev_get_gpio_in_named(DEVICE(&s->armv7m), "NMI", 0));
+
+    qdev_prop_set_uint32(DEVICE(&s->s32kwatchdog), "wdogclk-frq", S32KCLK);
+    object_property_set_bool(OBJECT(&s->s32kwatchdog), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->s32kwatchdog), 0,
+                       qdev_get_gpio_in(DEVICE(&s->nmi_orgate), 0));
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->s32kwatchdog), 0, 0x5002e000);
 
     /* 0x40080000 .. 0x4008ffff : IoTKit second Base peripheral region */
 
-    create_unimplemented_device("NS watchdog", 0x40081000, 0x1000);
-    create_unimplemented_device("S watchdog", 0x50081000, 0x1000);
+    qdev_prop_set_uint32(DEVICE(&s->nswatchdog), "wdogclk-frq", s->mainclk_frq);
+    object_property_set_bool(OBJECT(&s->nswatchdog), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->nswatchdog), 0,
+                       qdev_get_gpio_in(DEVICE(&s->armv7m), 1));
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->nswatchdog), 0, 0x40081000);
+
+    qdev_prop_set_uint32(DEVICE(&s->swatchdog), "wdogclk-frq", s->mainclk_frq);
+    object_property_set_bool(OBJECT(&s->swatchdog), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->swatchdog), 0,
+                       qdev_get_gpio_in(DEVICE(&s->nmi_orgate), 1));
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->swatchdog), 0, 0x50081000);
 
     for (i = 0; i < ARRAY_SIZE(s->ppc_irq_splitter); i++) {
         Object *splitter = OBJECT(&s->ppc_irq_splitter[i]);
diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
index 3e6d806e35..776d049708 100644
--- a/include/hw/arm/iotkit.h
+++ b/include/hw/arm/iotkit.h
@@ -57,6 +57,7 @@
 #include "hw/misc/tz-mpc.h"
 #include "hw/timer/cmsdk-apb-timer.h"
 #include "hw/timer/cmsdk-apb-dualtimer.h"
+#include "hw/watchdog/cmsdk-apb-watchdog.h"
 #include "hw/misc/unimp.h"
 #include "hw/or-irq.h"
 #include "hw/core/split-irq.h"
@@ -87,10 +88,15 @@ typedef struct IoTKit {
     SplitIRQ ppc_irq_splitter[NUM_PPCS];
     SplitIRQ mpc_irq_splitter[IOTS_NUM_EXP_MPC + IOTS_NUM_MPC];
     qemu_or_irq mpc_irq_orgate;
+    qemu_or_irq nmi_orgate;
 
     CMSDKAPBDualTimer dualtimer;
     UnimplementedDeviceState s32ktimer;
 
+    CMSDKAPBWatchdog s32kwatchdog;
+    CMSDKAPBWatchdog nswatchdog;
+    CMSDKAPBWatchdog swatchdog;
+
     MemoryRegion container;
     MemoryRegion alias1;
     MemoryRegion alias2;

From e2d203baba7bf202a64ee321c2754fe918ab909e Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:42 +0100
Subject: [PATCH 25/52] hw/arm/iotkit: Wire up the S32KTIMER
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The IoTKit has a CMSDK timer device that runs on the S32KCLK.
Create this and wire it up.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-8-peter.maydell@linaro.org
---
 hw/arm/iotkit.c         | 9 +++++----
 include/hw/arm/iotkit.h | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
index 5cedfa0357..cb0ec456f3 100644
--- a/hw/arm/iotkit.c
+++ b/hw/arm/iotkit.c
@@ -141,6 +141,8 @@ static void iotkit_init(Object *obj)
                           TYPE_CMSDK_APB_TIMER);
     sysbus_init_child_obj(obj, "timer1", &s->timer1, sizeof(s->timer1),
                           TYPE_CMSDK_APB_TIMER);
+    sysbus_init_child_obj(obj, "s32ktimer", &s->s32ktimer, sizeof(s->s32ktimer),
+                          TYPE_CMSDK_APB_TIMER);
     sysbus_init_child_obj(obj, "dualtimer", &s->dualtimer, sizeof(s->dualtimer),
                           TYPE_CMSDK_APB_DUALTIMER);
     sysbus_init_child_obj(obj, "s32kwatchdog", &s->s32kwatchdog,
@@ -166,8 +168,6 @@ static void iotkit_init(Object *obj)
                                 TYPE_SPLIT_IRQ, &error_abort, NULL);
         g_free(name);
     }
-    sysbus_init_child_obj(obj, "s32ktimer", &s->s32ktimer, sizeof(s->s32ktimer),
-                          TYPE_UNIMPLEMENTED_DEVICE);
 }
 
 static void iotkit_exp_irq(void *opaque, int n, int level)
@@ -476,13 +476,14 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
     /* Devices behind APB PPC1:
      *   0x4002f000: S32K timer
      */
-    qdev_prop_set_string(DEVICE(&s->s32ktimer), "name", "S32KTIMER");
-    qdev_prop_set_uint64(DEVICE(&s->s32ktimer), "size", 0x1000);
+    qdev_prop_set_uint32(DEVICE(&s->s32ktimer), "pclk-frq", S32KCLK);
     object_property_set_bool(OBJECT(&s->s32ktimer), true, "realized", &err);
     if (err) {
         error_propagate(errp, err);
         return;
     }
+    sysbus_connect_irq(SYS_BUS_DEVICE(&s->s32ktimer), 0,
+                       qdev_get_gpio_in(DEVICE(&s->armv7m), 2));
     mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->s32ktimer), 0);
     object_property_set_link(OBJECT(&s->apb_ppc1), OBJECT(mr), "port[0]", &err);
     if (err) {
diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
index 776d049708..0f5c510170 100644
--- a/include/hw/arm/iotkit.h
+++ b/include/hw/arm/iotkit.h
@@ -83,6 +83,7 @@ typedef struct IoTKit {
     TZMPC mpc;
     CMSDKAPBTIMER timer0;
     CMSDKAPBTIMER timer1;
+    CMSDKAPBTIMER s32ktimer;
     qemu_or_irq ppc_irq_orgate;
     SplitIRQ sec_resp_splitter;
     SplitIRQ ppc_irq_splitter[NUM_PPCS];
@@ -91,7 +92,6 @@ typedef struct IoTKit {
     qemu_or_irq nmi_orgate;
 
     CMSDKAPBDualTimer dualtimer;
-    UnimplementedDeviceState s32ktimer;
 
     CMSDKAPBWatchdog s32kwatchdog;
     CMSDKAPBWatchdog nswatchdog;

From 75750e4d43c9c62d26d2b218a1e8c2f8efdf16c4 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:42 +0100
Subject: [PATCH 26/52] hw/misc/iotkit-sysctl: Implement IoTKit system control
 element

The Arm IoTKit includes a system control element which
provides a block of read-only ID registers and a block
of read-write control registers. Implement a minimal
version of this.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-9-peter.maydell@linaro.org
---
 MAINTAINERS                     |   2 +
 default-configs/arm-softmmu.mak |   1 +
 hw/misc/Makefile.objs           |   1 +
 hw/misc/iotkit-sysctl.c         | 261 ++++++++++++++++++++++++++++++++
 hw/misc/trace-events            |   7 +
 include/hw/misc/iotkit-sysctl.h |  49 ++++++
 6 files changed, 321 insertions(+)
 create mode 100644 hw/misc/iotkit-sysctl.c
 create mode 100644 include/hw/misc/iotkit-sysctl.h

diff --git a/MAINTAINERS b/MAINTAINERS
index dc207e3fe7..c0c3012c16 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -539,6 +539,8 @@ F: hw/misc/mps2-*.c
 F: include/hw/misc/mps2-*.h
 F: hw/arm/iotkit.c
 F: include/hw/arm/iotkit.h
+F: hw/misc/iotkit-sysctl.c
+F: include/hw/misc/iotkit-sysctl.h
 
 Musicpal
 M: Jan Kiszka <jan.kiszka@web.de>
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index c8137a5d3c..79aac7702a 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -114,6 +114,7 @@ CONFIG_TZ_MPC=y
 CONFIG_TZ_PPC=y
 CONFIG_IOTKIT=y
 CONFIG_IOTKIT_SECCTL=y
+CONFIG_IOTKIT_SYSCTL=y
 
 CONFIG_VERSATILE=y
 CONFIG_VERSATILE_PCI=y
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index 22714b0851..ac1f3bc030 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -66,6 +66,7 @@ obj-$(CONFIG_MPS2_SCC) += mps2-scc.o
 obj-$(CONFIG_TZ_MPC) += tz-mpc.o
 obj-$(CONFIG_TZ_PPC) += tz-ppc.o
 obj-$(CONFIG_IOTKIT_SECCTL) += iotkit-secctl.o
+obj-$(CONFIG_IOTKIT_SYSCTL) += iotkit-sysctl.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
 obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
diff --git a/hw/misc/iotkit-sysctl.c b/hw/misc/iotkit-sysctl.c
new file mode 100644
index 0000000000..a21d8bd678
--- /dev/null
+++ b/hw/misc/iotkit-sysctl.c
@@ -0,0 +1,261 @@
+/*
+ * ARM IoTKit system control element
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "system control element" which is part of the
+ * Arm IoTKit and documented in
+ * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
+ * Specifically, it implements the "system control register" blocks.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "hw/misc/iotkit-sysctl.h"
+
+REG32(SECDBGSTAT, 0x0)
+REG32(SECDBGSET, 0x4)
+REG32(SECDBGCLR, 0x8)
+REG32(RESET_SYNDROME, 0x100)
+REG32(RESET_MASK, 0x104)
+REG32(SWRESET, 0x108)
+    FIELD(SWRESET, SWRESETREQ, 9, 1)
+REG32(GRETREG, 0x10c)
+REG32(INITSVRTOR0, 0x110)
+REG32(CPUWAIT, 0x118)
+REG32(BUSWAIT, 0x11c)
+REG32(WICCTRL, 0x120)
+REG32(PID4, 0xfd0)
+REG32(PID5, 0xfd4)
+REG32(PID6, 0xfd8)
+REG32(PID7, 0xfdc)
+REG32(PID0, 0xfe0)
+REG32(PID1, 0xfe4)
+REG32(PID2, 0xfe8)
+REG32(PID3, 0xfec)
+REG32(CID0, 0xff0)
+REG32(CID1, 0xff4)
+REG32(CID2, 0xff8)
+REG32(CID3, 0xffc)
+
+/* PID/CID values */
+static const int sysctl_id[] = {
+    0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
+    0x54, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
+    0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
+};
+
+static uint64_t iotkit_sysctl_read(void *opaque, hwaddr offset,
+                                    unsigned size)
+{
+    IoTKitSysCtl *s = IOTKIT_SYSCTL(opaque);
+    uint64_t r;
+
+    switch (offset) {
+    case A_SECDBGSTAT:
+        r = s->secure_debug;
+        break;
+    case A_RESET_SYNDROME:
+        r = s->reset_syndrome;
+        break;
+    case A_RESET_MASK:
+        r = s->reset_mask;
+        break;
+    case A_GRETREG:
+        r = s->gretreg;
+        break;
+    case A_INITSVRTOR0:
+        r = s->initsvrtor0;
+        break;
+    case A_CPUWAIT:
+        r = s->cpuwait;
+        break;
+    case A_BUSWAIT:
+        /* In IoTKit BUSWAIT is reserved, R/O, zero */
+        r = 0;
+        break;
+    case A_WICCTRL:
+        r = s->wicctrl;
+        break;
+    case A_PID4 ... A_CID3:
+        r = sysctl_id[(offset - A_PID4) / 4];
+        break;
+    case A_SECDBGSET:
+    case A_SECDBGCLR:
+    case A_SWRESET:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "IoTKit SysCtl read: read of WO offset %x\n",
+                      (int)offset);
+        r = 0;
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "IoTKit SysCtl read: bad offset %x\n", (int)offset);
+        r = 0;
+        break;
+    }
+    trace_iotkit_sysctl_read(offset, r, size);
+    return r;
+}
+
+static void iotkit_sysctl_write(void *opaque, hwaddr offset,
+                                 uint64_t value, unsigned size)
+{
+    IoTKitSysCtl *s = IOTKIT_SYSCTL(opaque);
+
+    trace_iotkit_sysctl_write(offset, value, size);
+
+    /*
+     * Most of the state here has to do with control of reset and
+     * similar kinds of power up -- for instance the guest can ask
+     * what the reason for the last reset was, or forbid reset for
+     * some causes (like the non-secure watchdog). Most of this is
+     * not relevant to QEMU, which doesn't really model anything other
+     * than a full power-on reset.
+     * We just model the registers as reads-as-written.
+     */
+
+    switch (offset) {
+    case A_RESET_SYNDROME:
+        qemu_log_mask(LOG_UNIMP,
+                      "IoTKit SysCtl RESET_SYNDROME unimplemented\n");
+        s->reset_syndrome = value;
+        break;
+    case A_RESET_MASK:
+        qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl RESET_MASK unimplemented\n");
+        s->reset_mask = value;
+        break;
+    case A_GRETREG:
+        /*
+         * General retention register, which is only reset by a power-on
+         * reset. Technically this implementation is complete, since
+         * QEMU only supports power-on resets...
+         */
+        s->gretreg = value;
+        break;
+    case A_INITSVRTOR0:
+        qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl INITSVRTOR0 unimplemented\n");
+        s->initsvrtor0 = value;
+        break;
+    case A_CPUWAIT:
+        qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl CPUWAIT unimplemented\n");
+        s->cpuwait = value;
+        break;
+    case A_WICCTRL:
+        qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl WICCTRL unimplemented\n");
+        s->wicctrl = value;
+        break;
+    case A_SECDBGSET:
+        /* write-1-to-set */
+        qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl SECDBGSET unimplemented\n");
+        s->secure_debug |= value;
+        break;
+    case A_SECDBGCLR:
+        /* write-1-to-clear */
+        s->secure_debug &= ~value;
+        break;
+    case A_SWRESET:
+        /* One w/o bit to request a reset; all other bits reserved */
+        if (value & R_SWRESET_SWRESETREQ_MASK) {
+            qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
+        }
+        break;
+    case A_BUSWAIT:        /* In IoTKit BUSWAIT is reserved, R/O, zero */
+    case A_SECDBGSTAT:
+    case A_PID4 ... A_CID3:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "IoTKit SysCtl write: write of RO offset %x\n",
+                      (int)offset);
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "IoTKit SysCtl write: bad offset %x\n", (int)offset);
+        break;
+    }
+}
+
+static const MemoryRegionOps iotkit_sysctl_ops = {
+    .read = iotkit_sysctl_read,
+    .write = iotkit_sysctl_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    /* byte/halfword accesses are just zero-padded on reads and writes */
+    .impl.min_access_size = 4,
+    .impl.max_access_size = 4,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
+};
+
+static void iotkit_sysctl_reset(DeviceState *dev)
+{
+    IoTKitSysCtl *s = IOTKIT_SYSCTL(dev);
+
+    trace_iotkit_sysctl_reset();
+    s->secure_debug = 0;
+    s->reset_syndrome = 1;
+    s->reset_mask = 0;
+    s->gretreg = 0;
+    s->initsvrtor0 = 0x10000000;
+    s->cpuwait = 0;
+    s->wicctrl = 0;
+}
+
+static void iotkit_sysctl_init(Object *obj)
+{
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    IoTKitSysCtl *s = IOTKIT_SYSCTL(obj);
+
+    memory_region_init_io(&s->iomem, obj, &iotkit_sysctl_ops,
+                          s, "iotkit-sysctl", 0x1000);
+    sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static const VMStateDescription iotkit_sysctl_vmstate = {
+    .name = "iotkit-sysctl",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(secure_debug, IoTKitSysCtl),
+        VMSTATE_UINT32(reset_syndrome, IoTKitSysCtl),
+        VMSTATE_UINT32(reset_mask, IoTKitSysCtl),
+        VMSTATE_UINT32(gretreg, IoTKitSysCtl),
+        VMSTATE_UINT32(initsvrtor0, IoTKitSysCtl),
+        VMSTATE_UINT32(cpuwait, IoTKitSysCtl),
+        VMSTATE_UINT32(wicctrl, IoTKitSysCtl),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static void iotkit_sysctl_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->vmsd = &iotkit_sysctl_vmstate;
+    dc->reset = iotkit_sysctl_reset;
+}
+
+static const TypeInfo iotkit_sysctl_info = {
+    .name = TYPE_IOTKIT_SYSCTL,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(IoTKitSysCtl),
+    .instance_init = iotkit_sysctl_init,
+    .class_init = iotkit_sysctl_class_init,
+};
+
+static void iotkit_sysctl_register_types(void)
+{
+    type_register_static(&iotkit_sysctl_info);
+}
+
+type_init(iotkit_sysctl_register_types);
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 1341508b33..7faf759283 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -116,3 +116,10 @@ ccm_freq(uint32_t freq) "freq = %d\n"
 ccm_clock_freq(uint32_t clock, uint32_t freq) "(Clock = %d) = %d\n"
 ccm_read_reg(const char *reg_name, uint32_t value) "reg[%s] <= 0x%" PRIx32 "\n"
 ccm_write_reg(const char *reg_name, uint32_t value) "reg[%s] => 0x%" PRIx32 "\n"
+
+# hw/misc/iotkit-sysctl.c
+iotkit_sysinfo_read(uint64_t offset, uint64_t data, unsigned size) "IoTKit SysInfo read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+iotkit_sysinfo_write(uint64_t offset, uint64_t data, unsigned size) "IoTKit SysInfo write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+iotkit_sysctl_read(uint64_t offset, uint64_t data, unsigned size) "IoTKit SysCtl read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+iotkit_sysctl_write(uint64_t offset, uint64_t data, unsigned size) "IoTKit SysCtl write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
+iotkit_sysctl_reset(void) "IoTKit SysCtl: reset"
diff --git a/include/hw/misc/iotkit-sysctl.h b/include/hw/misc/iotkit-sysctl.h
new file mode 100644
index 0000000000..e36613cb5e
--- /dev/null
+++ b/include/hw/misc/iotkit-sysctl.h
@@ -0,0 +1,49 @@
+/*
+ * ARM IoTKit system control element
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "system control element" which is part of the
+ * Arm IoTKit and documented in
+ * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
+ * Specifically, it implements the "system information block" and
+ * "system control register" blocks.
+ *
+ * QEMU interface:
+ *  + sysbus MMIO region 0: the system information register bank
+ *  + sysbus MMIO region 1: the system control register bank
+ */
+
+#ifndef HW_MISC_IOTKIT_SYSCTL_H
+#define HW_MISC_IOTKIT_SYSCTL_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_IOTKIT_SYSCTL "iotkit-sysctl"
+#define IOTKIT_SYSCTL(obj) OBJECT_CHECK(IoTKitSysCtl, (obj), \
+                                        TYPE_IOTKIT_SYSCTL)
+
+typedef struct IoTKitSysCtl {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    MemoryRegion iomem;
+
+    uint32_t secure_debug;
+    uint32_t reset_syndrome;
+    uint32_t reset_mask;
+    uint32_t gretreg;
+    uint32_t initsvrtor0;
+    uint32_t cpuwait;
+    uint32_t wicctrl;
+} IoTKitSysCtl;
+
+#endif

From c667a25b324d086c7ea8002dbedeb10929d3b9da Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:43 +0100
Subject: [PATCH 27/52] hw/misc/iotkit-sysinfo: Implement IoTKit system
 information block
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Implement the IoTKit system control element's system information
block; this is just a pair of read-only version/config registers,
plus the usual PID/CID ID registers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-10-peter.maydell@linaro.org
---
 MAINTAINERS                      |   2 +
 default-configs/arm-softmmu.mak  |   1 +
 hw/misc/Makefile.objs            |   1 +
 hw/misc/iotkit-sysinfo.c         | 128 +++++++++++++++++++++++++++++++
 include/hw/misc/iotkit-sysinfo.h |  37 +++++++++
 5 files changed, 169 insertions(+)
 create mode 100644 hw/misc/iotkit-sysinfo.c
 create mode 100644 include/hw/misc/iotkit-sysinfo.h

diff --git a/MAINTAINERS b/MAINTAINERS
index c0c3012c16..17345de524 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -541,6 +541,8 @@ F: hw/arm/iotkit.c
 F: include/hw/arm/iotkit.h
 F: hw/misc/iotkit-sysctl.c
 F: include/hw/misc/iotkit-sysctl.h
+F: hw/misc/iotkit-sysinfo.c
+F: include/hw/misc/iotkit-sysinfo.h
 
 Musicpal
 M: Jan Kiszka <jan.kiszka@web.de>
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 79aac7702a..ebbdcb29f3 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -115,6 +115,7 @@ CONFIG_TZ_PPC=y
 CONFIG_IOTKIT=y
 CONFIG_IOTKIT_SECCTL=y
 CONFIG_IOTKIT_SYSCTL=y
+CONFIG_IOTKIT_SYSINFO=y
 
 CONFIG_VERSATILE=y
 CONFIG_VERSATILE_PCI=y
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index ac1f3bc030..af2b503824 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -67,6 +67,7 @@ obj-$(CONFIG_TZ_MPC) += tz-mpc.o
 obj-$(CONFIG_TZ_PPC) += tz-ppc.o
 obj-$(CONFIG_IOTKIT_SECCTL) += iotkit-secctl.o
 obj-$(CONFIG_IOTKIT_SYSCTL) += iotkit-sysctl.o
+obj-$(CONFIG_IOTKIT_SYSINFO) += iotkit-sysinfo.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
 obj-$(CONFIG_HYPERV_TESTDEV) += hyperv_testdev.o
diff --git a/hw/misc/iotkit-sysinfo.c b/hw/misc/iotkit-sysinfo.c
new file mode 100644
index 0000000000..78955bc45f
--- /dev/null
+++ b/hw/misc/iotkit-sysinfo.c
@@ -0,0 +1,128 @@
+/*
+ * ARM IoTKit system information block
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "system information block" which is part of the
+ * Arm IoTKit and documented in
+ * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
+ * It consists of 2 read-only version/config registers, plus the
+ * usual ID registers.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "qapi/error.h"
+#include "sysemu/sysemu.h"
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "hw/misc/iotkit-sysinfo.h"
+
+REG32(SYS_VERSION, 0x0)
+REG32(SYS_CONFIG, 0x4)
+REG32(PID4, 0xfd0)
+REG32(PID5, 0xfd4)
+REG32(PID6, 0xfd8)
+REG32(PID7, 0xfdc)
+REG32(PID0, 0xfe0)
+REG32(PID1, 0xfe4)
+REG32(PID2, 0xfe8)
+REG32(PID3, 0xfec)
+REG32(CID0, 0xff0)
+REG32(CID1, 0xff4)
+REG32(CID2, 0xff8)
+REG32(CID3, 0xffc)
+
+/* PID/CID values */
+static const int sysinfo_id[] = {
+    0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
+    0x58, 0xb8, 0x0b, 0x00, /* PID0..PID3 */
+    0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
+};
+
+static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
+                                    unsigned size)
+{
+    uint64_t r;
+
+    switch (offset) {
+    case A_SYS_VERSION:
+        r = 0x41743;
+        break;
+
+    case A_SYS_CONFIG:
+        r = 0x31;
+        break;
+    case A_PID4 ... A_CID3:
+        r = sysinfo_id[(offset - A_PID4) / 4];
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "IoTKit SysInfo read: bad offset %x\n", (int)offset);
+        r = 0;
+        break;
+    }
+    trace_iotkit_sysinfo_read(offset, r, size);
+    return r;
+}
+
+static void iotkit_sysinfo_write(void *opaque, hwaddr offset,
+                                 uint64_t value, unsigned size)
+{
+    trace_iotkit_sysinfo_write(offset, value, size);
+
+    qemu_log_mask(LOG_GUEST_ERROR,
+                  "IoTKit SysInfo: write to RO offset 0x%x\n", (int)offset);
+}
+
+static const MemoryRegionOps iotkit_sysinfo_ops = {
+    .read = iotkit_sysinfo_read,
+    .write = iotkit_sysinfo_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    /* byte/halfword accesses are just zero-padded on reads and writes */
+    .impl.min_access_size = 4,
+    .impl.max_access_size = 4,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
+};
+
+static void iotkit_sysinfo_init(Object *obj)
+{
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    IoTKitSysInfo *s = IOTKIT_SYSINFO(obj);
+
+    memory_region_init_io(&s->iomem, obj, &iotkit_sysinfo_ops,
+                          s, "iotkit-sysinfo", 0x1000);
+    sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static void iotkit_sysinfo_class_init(ObjectClass *klass, void *data)
+{
+    /*
+     * This device has no guest-modifiable state and so it
+     * does not need a reset function or VMState.
+     */
+}
+
+static const TypeInfo iotkit_sysinfo_info = {
+    .name = TYPE_IOTKIT_SYSINFO,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(IoTKitSysInfo),
+    .instance_init = iotkit_sysinfo_init,
+    .class_init = iotkit_sysinfo_class_init,
+};
+
+static void iotkit_sysinfo_register_types(void)
+{
+    type_register_static(&iotkit_sysinfo_info);
+}
+
+type_init(iotkit_sysinfo_register_types);
diff --git a/include/hw/misc/iotkit-sysinfo.h b/include/hw/misc/iotkit-sysinfo.h
new file mode 100644
index 0000000000..7b2e1a5e48
--- /dev/null
+++ b/include/hw/misc/iotkit-sysinfo.h
@@ -0,0 +1,37 @@
+/*
+ * ARM IoTKit system information block
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 or
+ *  (at your option) any later version.
+ */
+
+/*
+ * This is a model of the "system information block" which is part of the
+ * Arm IoTKit and documented in
+ * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html
+ * QEMU interface:
+ *  + sysbus MMIO region 0: the system information register bank
+ */
+
+#ifndef HW_MISC_IOTKIT_SYSINFO_H
+#define HW_MISC_IOTKIT_SYSINFO_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_IOTKIT_SYSINFO "iotkit-sysinfo"
+#define IOTKIT_SYSINFO(obj) OBJECT_CHECK(IoTKitSysInfo, (obj), \
+                                        TYPE_IOTKIT_SYSINFO)
+
+typedef struct IoTKitSysInfo {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    MemoryRegion iomem;
+} IoTKitSysInfo;
+
+#endif

From 06e65af39b451c6abe863986a9c60d69bde7718d Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:43 +0100
Subject: [PATCH 28/52] hw/misc/iotkit: Wire up the sysctl and sysinfo register
 blocks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Wire up the system control element's register banks
(sysctl and sysinfo).

This is the last of the previously completely unimplemented
components in the IoTKit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180820141116.9118-11-peter.maydell@linaro.org
---
 hw/arm/iotkit.c         | 26 ++++++++++++++++++--------
 include/hw/arm/iotkit.h |  6 +++++-
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
index cb0ec456f3..f8276b5425 100644
--- a/hw/arm/iotkit.c
+++ b/hw/arm/iotkit.c
@@ -16,7 +16,6 @@
 #include "hw/sysbus.h"
 #include "hw/registerfields.h"
 #include "hw/arm/iotkit.h"
-#include "hw/misc/unimp.h"
 #include "hw/arm/arm.h"
 
 /* Clock frequency in HZ of the 32KHz "slow clock" */
@@ -151,6 +150,10 @@ static void iotkit_init(Object *obj)
                           sizeof(s->nswatchdog), TYPE_CMSDK_APB_WATCHDOG);
     sysbus_init_child_obj(obj, "swatchdog", &s->swatchdog,
                           sizeof(s->swatchdog), TYPE_CMSDK_APB_WATCHDOG);
+    sysbus_init_child_obj(obj, "iotkit-sysctl", &s->sysctl,
+                          sizeof(s->sysctl), TYPE_IOTKIT_SYSCTL);
+    sysbus_init_child_obj(obj, "iotkit-sysinfo", &s->sysinfo,
+                          sizeof(s->sysinfo), TYPE_IOTKIT_SYSINFO);
     object_initialize_child(obj, "nmi-orgate", &s->nmi_orgate,
                             sizeof(s->nmi_orgate), TYPE_OR_IRQ,
                             &error_abort, NULL);
@@ -516,13 +519,20 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
                           qdev_get_gpio_in_named(dev_apb_ppc1,
                                                  "cfg_sec_resp", 0));
 
-    /* Using create_unimplemented_device() maps the stub into the
-     * system address space rather than into our container, but the
-     * overall effect to the guest is the same.
-     */
-    create_unimplemented_device("SYSINFO", 0x40020000, 0x1000);
-
-    create_unimplemented_device("SYSCONTROL", 0x50021000, 0x1000);
+    object_property_set_bool(OBJECT(&s->sysinfo), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    /* System information registers */
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->sysinfo), 0, 0x40020000);
+    /* System control registers */
+    object_property_set_bool(OBJECT(&s->sysctl), true, "realized", &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->sysctl), 0, 0x50021000);
 
     /* This OR gate wires together outputs from the secure watchdogs to NMI */
     object_property_set_int(OBJECT(&s->nmi_orgate), 2, "num-lines", &err);
diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
index 0f5c510170..426dc326a0 100644
--- a/include/hw/arm/iotkit.h
+++ b/include/hw/arm/iotkit.h
@@ -58,7 +58,8 @@
 #include "hw/timer/cmsdk-apb-timer.h"
 #include "hw/timer/cmsdk-apb-dualtimer.h"
 #include "hw/watchdog/cmsdk-apb-watchdog.h"
-#include "hw/misc/unimp.h"
+#include "hw/misc/iotkit-sysctl.h"
+#include "hw/misc/iotkit-sysinfo.h"
 #include "hw/or-irq.h"
 #include "hw/core/split-irq.h"
 
@@ -97,6 +98,9 @@ typedef struct IoTKit {
     CMSDKAPBWatchdog nswatchdog;
     CMSDKAPBWatchdog swatchdog;
 
+    IoTKitSysCtl sysctl;
+    IoTKitSysCtl sysinfo;
+
     MemoryRegion container;
     MemoryRegion alias1;
     MemoryRegion alias2;

From 211e701d669e85f0e33ff6c4404a77519198f35e Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:43 +0100
Subject: [PATCH 29/52] hw/misc/tz-msc: Model TrustZone Master Security
 Controller

Implement a model of the TrustZone Master Securtiy Controller,
as documented in the Arm CoreLink SIE-200 System IP for
Embedded TRM  (DDI0571G):
  https://developer.arm.com/products/architecture/m-profile/docs/ddi0571/g

The MSC is intended to sit in front of a device which can
be a bus master (eg a DMA controller) and programmably gate
its transactions. This allows a bus-mastering device to be
controlled by non-secure code but still restricted from
making accesses to addresses which are secure-only.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-12-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 MAINTAINERS                     |   2 +
 default-configs/arm-softmmu.mak |   1 +
 hw/misc/Makefile.objs           |   1 +
 hw/misc/trace-events            |   9 +
 hw/misc/tz-msc.c                | 308 ++++++++++++++++++++++++++++++++
 include/hw/misc/tz-msc.h        |  79 ++++++++
 6 files changed, 400 insertions(+)
 create mode 100644 hw/misc/tz-msc.c
 create mode 100644 include/hw/misc/tz-msc.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 17345de524..abbaccc475 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -465,6 +465,8 @@ F: hw/misc/tz-ppc.c
 F: include/hw/misc/tz-ppc.h
 F: hw/misc/tz-mpc.c
 F: include/hw/misc/tz-mpc.h
+F: hw/misc/tz-msc.c
+F: include/hw/misc/tz-msc.h
 
 ARM cores
 M: Peter Maydell <peter.maydell@linaro.org>
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index ebbdcb29f3..0483d548d9 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -111,6 +111,7 @@ CONFIG_MPS2_FPGAIO=y
 CONFIG_MPS2_SCC=y
 
 CONFIG_TZ_MPC=y
+CONFIG_TZ_MSC=y
 CONFIG_TZ_PPC=y
 CONFIG_IOTKIT=y
 CONFIG_IOTKIT_SECCTL=y
diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index af2b503824..6d50b03cfd 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -64,6 +64,7 @@ obj-$(CONFIG_MPS2_FPGAIO) += mps2-fpgaio.o
 obj-$(CONFIG_MPS2_SCC) += mps2-scc.o
 
 obj-$(CONFIG_TZ_MPC) += tz-mpc.o
+obj-$(CONFIG_TZ_MSC) += tz-msc.o
 obj-$(CONFIG_TZ_PPC) += tz-ppc.o
 obj-$(CONFIG_IOTKIT_SECCTL) += iotkit-secctl.o
 obj-$(CONFIG_IOTKIT_SYSCTL) += iotkit-sysctl.o
diff --git a/hw/misc/trace-events b/hw/misc/trace-events
index 7faf759283..52466c77c4 100644
--- a/hw/misc/trace-events
+++ b/hw/misc/trace-events
@@ -92,6 +92,15 @@ tz_mpc_mem_blocked_write(uint64_t addr, uint64_t data, unsigned size, bool secur
 tz_mpc_translate(uint64_t addr, int flags, const char *idx, const char *res) "TZ MPC translate: addr 0x%" PRIx64 " flags 0x%x iommu_idx %s: %s"
 tz_mpc_iommu_notify(uint64_t addr) "TZ MPC iommu: notifying UNMAP/MAP for 0x%" PRIx64
 
+# hw/misc/tz-msc.c
+tz_msc_reset(void) "TZ MSC: reset"
+tz_msc_cfg_nonsec(int level) "TZ MSC: cfg_nonsec = %d"
+tz_msc_cfg_sec_resp(int level) "TZ MSC: cfg_sec_resp = %d"
+tz_msc_irq_enable(int level) "TZ MSC: int_enable = %d"
+tz_msc_irq_clear(int level) "TZ MSC: int_clear = %d"
+tz_msc_update_irq(int level) "TZ MSC: setting irq line to %d"
+tz_msc_access_blocked(uint64_t offset) "TZ MSC: offset 0x%" PRIx64 " access blocked"
+
 # hw/misc/tz-ppc.c
 tz_ppc_reset(void) "TZ PPC: reset"
 tz_ppc_cfg_nonsec(int n, int level) "TZ PPC: cfg_nonsec[%d] = %d"
diff --git a/hw/misc/tz-msc.c b/hw/misc/tz-msc.c
new file mode 100644
index 0000000000..9e352044ea
--- /dev/null
+++ b/hw/misc/tz-msc.c
@@ -0,0 +1,308 @@
+/*
+ * ARM TrustZone master security controller emulation
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "trace.h"
+#include "hw/sysbus.h"
+#include "hw/registerfields.h"
+#include "hw/misc/tz-msc.h"
+
+static void tz_msc_update_irq(TZMSC *s)
+{
+    bool level = s->irq_status;
+
+    trace_tz_msc_update_irq(level);
+    qemu_set_irq(s->irq, level);
+}
+
+static void tz_msc_cfg_nonsec(void *opaque, int n, int level)
+{
+    TZMSC *s = TZ_MSC(opaque);
+
+    trace_tz_msc_cfg_nonsec(level);
+    s->cfg_nonsec = level;
+}
+
+static void tz_msc_cfg_sec_resp(void *opaque, int n, int level)
+{
+    TZMSC *s = TZ_MSC(opaque);
+
+    trace_tz_msc_cfg_sec_resp(level);
+    s->cfg_sec_resp = level;
+}
+
+static void tz_msc_irq_clear(void *opaque, int n, int level)
+{
+    TZMSC *s = TZ_MSC(opaque);
+
+    trace_tz_msc_irq_clear(level);
+
+    s->irq_clear = level;
+    if (level) {
+        s->irq_status = false;
+        tz_msc_update_irq(s);
+    }
+}
+
+/* The MSC may either block a transaction by aborting it, block a
+ * transaction by making it RAZ/WI, allow it through with
+ * MemTxAttrs indicating a secure transaction, or allow it with
+ * MemTxAttrs indicating a non-secure transaction.
+ */
+typedef enum MSCAction {
+    MSCBlockAbort,
+    MSCBlockRAZWI,
+    MSCAllowSecure,
+    MSCAllowNonSecure,
+} MSCAction;
+
+static MSCAction tz_msc_check(TZMSC *s, hwaddr addr)
+{
+    /*
+     * Check whether to allow an access from the bus master, returning
+     * an MSCAction indicating the required behaviour. If the transaction
+     * is blocked, the caller must check cfg_sec_resp to determine
+     * whether to abort or RAZ/WI the transaction.
+     */
+    IDAUInterfaceClass *iic = IDAU_INTERFACE_GET_CLASS(s->idau);
+    IDAUInterface *ii = IDAU_INTERFACE(s->idau);
+    bool idau_exempt = false, idau_ns = true, idau_nsc = true;
+    int idau_region = IREGION_NOTVALID;
+
+    iic->check(ii, addr, &idau_region, &idau_exempt, &idau_ns, &idau_nsc);
+
+    if (idau_exempt) {
+        /*
+         * Uncheck region -- OK, transaction type depends on
+         * whether bus master is configured as Secure or NonSecure
+         */
+        return s->cfg_nonsec ? MSCAllowNonSecure : MSCAllowSecure;
+    }
+
+    if (idau_ns) {
+        /* NonSecure region -- always forward as NS transaction */
+        return MSCAllowNonSecure;
+    }
+
+    if (!s->cfg_nonsec) {
+        /* Access to Secure region by Secure bus master: OK */
+        return MSCAllowSecure;
+    }
+
+    /* Attempted access to Secure region by NS bus master: block */
+    trace_tz_msc_access_blocked(addr);
+    if (!s->cfg_sec_resp) {
+        return MSCBlockRAZWI;
+    }
+
+    /*
+     * The TRM isn't clear on behaviour if irq_clear is high when a
+     * transaction is blocked. We assume that the MSC behaves like the
+     * PPC, where holding irq_clear high suppresses the interrupt.
+     */
+    if (!s->irq_clear) {
+        s->irq_status = true;
+        tz_msc_update_irq(s);
+    }
+    return MSCBlockAbort;
+}
+
+static MemTxResult tz_msc_read(void *opaque, hwaddr addr, uint64_t *pdata,
+                               unsigned size, MemTxAttrs attrs)
+{
+    TZMSC *s = opaque;
+    AddressSpace *as = &s->downstream_as;
+    uint64_t data;
+    MemTxResult res;
+
+    switch (tz_msc_check(s, addr)) {
+    case MSCBlockAbort:
+        return MEMTX_ERROR;
+    case MSCBlockRAZWI:
+        *pdata = 0;
+        return MEMTX_OK;
+    case MSCAllowSecure:
+        attrs.secure = 1;
+        attrs.unspecified = 0;
+        break;
+    case MSCAllowNonSecure:
+        attrs.secure = 0;
+        attrs.unspecified = 0;
+        break;
+    }
+
+    switch (size) {
+    case 1:
+        data = address_space_ldub(as, addr, attrs, &res);
+        break;
+    case 2:
+        data = address_space_lduw_le(as, addr, attrs, &res);
+        break;
+    case 4:
+        data = address_space_ldl_le(as, addr, attrs, &res);
+        break;
+    case 8:
+        data = address_space_ldq_le(as, addr, attrs, &res);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    *pdata = data;
+    return res;
+}
+
+static MemTxResult tz_msc_write(void *opaque, hwaddr addr, uint64_t val,
+                                unsigned size, MemTxAttrs attrs)
+{
+    TZMSC *s = opaque;
+    AddressSpace *as = &s->downstream_as;
+    MemTxResult res;
+
+    switch (tz_msc_check(s, addr)) {
+    case MSCBlockAbort:
+        return MEMTX_ERROR;
+    case MSCBlockRAZWI:
+        return MEMTX_OK;
+    case MSCAllowSecure:
+        attrs.secure = 1;
+        attrs.unspecified = 0;
+        break;
+    case MSCAllowNonSecure:
+        attrs.secure = 0;
+        attrs.unspecified = 0;
+        break;
+    }
+
+    switch (size) {
+    case 1:
+        address_space_stb(as, addr, val, attrs, &res);
+        break;
+    case 2:
+        address_space_stw_le(as, addr, val, attrs, &res);
+        break;
+    case 4:
+        address_space_stl_le(as, addr, val, attrs, &res);
+        break;
+    case 8:
+        address_space_stq_le(as, addr, val, attrs, &res);
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    return res;
+}
+
+static const MemoryRegionOps tz_msc_ops = {
+    .read_with_attrs = tz_msc_read,
+    .write_with_attrs = tz_msc_write,
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void tz_msc_reset(DeviceState *dev)
+{
+    TZMSC *s = TZ_MSC(dev);
+
+    trace_tz_msc_reset();
+    s->cfg_sec_resp = false;
+    s->cfg_nonsec = false;
+    s->irq_clear = 0;
+    s->irq_status = 0;
+}
+
+static void tz_msc_init(Object *obj)
+{
+    DeviceState *dev = DEVICE(obj);
+    TZMSC *s = TZ_MSC(obj);
+
+    qdev_init_gpio_in_named(dev, tz_msc_cfg_nonsec, "cfg_nonsec", 1);
+    qdev_init_gpio_in_named(dev, tz_msc_cfg_sec_resp, "cfg_sec_resp", 1);
+    qdev_init_gpio_in_named(dev, tz_msc_irq_clear, "irq_clear", 1);
+    qdev_init_gpio_out_named(dev, &s->irq, "irq", 1);
+}
+
+static void tz_msc_realize(DeviceState *dev, Error **errp)
+{
+    Object *obj = OBJECT(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+    TZMSC *s = TZ_MSC(dev);
+    const char *name = "tz-msc-downstream";
+    uint64_t size;
+
+    /*
+     * We can't create the upstream end of the port until realize,
+     * as we don't know the size of the MR used as the downstream until then.
+     * We insist on having a downstream, to avoid complicating the
+     * code with handling the "don't know how big this is" case. It's easy
+     * enough for the user to create an unimplemented_device as downstream
+     * if they have nothing else to plug into this.
+     */
+    if (!s->downstream) {
+        error_setg(errp, "MSC 'downstream' link not set");
+        return;
+    }
+    if (!s->idau) {
+        error_setg(errp, "MSC 'idau' link not set");
+        return;
+    }
+
+    size = memory_region_size(s->downstream);
+    address_space_init(&s->downstream_as, s->downstream, name);
+    memory_region_init_io(&s->upstream, obj, &tz_msc_ops, s, name, size);
+    sysbus_init_mmio(sbd, &s->upstream);
+}
+
+static const VMStateDescription tz_msc_vmstate = {
+    .name = "tz-msc",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(cfg_nonsec, TZMSC),
+        VMSTATE_BOOL(cfg_sec_resp, TZMSC),
+        VMSTATE_BOOL(irq_clear, TZMSC),
+        VMSTATE_BOOL(irq_status, TZMSC),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static Property tz_msc_properties[] = {
+    DEFINE_PROP_LINK("downstream", TZMSC, downstream,
+                     TYPE_MEMORY_REGION, MemoryRegion *),
+    DEFINE_PROP_LINK("idau", TZMSC, idau,
+                     TYPE_IDAU_INTERFACE, IDAUInterface *),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void tz_msc_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = tz_msc_realize;
+    dc->vmsd = &tz_msc_vmstate;
+    dc->reset = tz_msc_reset;
+    dc->props = tz_msc_properties;
+}
+
+static const TypeInfo tz_msc_info = {
+    .name = TYPE_TZ_MSC,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(TZMSC),
+    .instance_init = tz_msc_init,
+    .class_init = tz_msc_class_init,
+};
+
+static void tz_msc_register_types(void)
+{
+    type_register_static(&tz_msc_info);
+}
+
+type_init(tz_msc_register_types);
diff --git a/include/hw/misc/tz-msc.h b/include/hw/misc/tz-msc.h
new file mode 100644
index 0000000000..116b96ae9b
--- /dev/null
+++ b/include/hw/misc/tz-msc.h
@@ -0,0 +1,79 @@
+/*
+ * ARM TrustZone master security controller emulation
+ *
+ * Copyright (c) 2018 Linaro Limited
+ * Written by Peter Maydell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+/*
+ * This is a model of the TrustZone master security controller (MSC).
+ * It is documented in the ARM CoreLink SIE-200 System IP for Embedded TRM
+ * (DDI 0571G):
+ * https://developer.arm.com/products/architecture/m-profile/docs/ddi0571/g
+ *
+ * The MSC sits in front of a device which can be a bus master (such as
+ * a DMA controller) and allows secure software to configure it to either
+ * pass through or reject transactions made by that bus master.
+ * Rejected transactions may be configured to either be aborted, or to
+ * behave as RAZ/WI. An interrupt can be signalled for a rejected transaction.
+ *
+ * The MSC has no register interface -- it is configured purely by a
+ * collection of input signals from other hardware in the system. Typically
+ * they are either hardwired or exposed in an ad-hoc register interface by
+ * the SoC that uses the MSC.
+ *
+ * We don't currently implement the irq_enable GPIO input, because on
+ * the MPS2 FPGA images it is always tied high, which is awkward to
+ * implement in QEMU.
+ *
+ * QEMU interface:
+ * + Named GPIO input "cfg_nonsec": set to 1 if the bus master should be
+ *   treated as nonsecure, or 0 for secure
+ * + Named GPIO input "cfg_sec_resp": set to 1 if a rejected transaction should
+ *   result in a transaction error, or 0 for the transaction to RAZ/WI
+ * + Named GPIO input "irq_clear": set to 1 to clear a pending interrupt
+ * + Named GPIO output "irq": set for a transaction-failed interrupt
+ * + Property "downstream": MemoryRegion defining where bus master transactions
+ *   are made if they are not blocked
+ * + Property "idau": an object implementing IDAUInterface, which defines which
+ *   addresses should be treated as secure and which as non-secure.
+ *   This need not be the same IDAU as the one used by the CPU.
+ * + sysbus MMIO region 0: MemoryRegion defining the upstream end of the MSC;
+ *   this should be passed to the bus master device as the region it should
+ *   make memory transactions to
+ */
+
+#ifndef TZ_MSC_H
+#define TZ_MSC_H
+
+#include "hw/sysbus.h"
+#include "target/arm/idau.h"
+
+#define TYPE_TZ_MSC "tz-msc"
+#define TZ_MSC(obj) OBJECT_CHECK(TZMSC, (obj), TYPE_TZ_MSC)
+
+typedef struct TZMSC {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+
+    /* State: these just track the values of our input signals */
+    bool cfg_nonsec;
+    bool cfg_sec_resp;
+    bool irq_clear;
+    /* State: are we asserting irq ? */
+    bool irq_status;
+
+    qemu_irq irq;
+    MemoryRegion *downstream;
+    AddressSpace downstream_as;
+    MemoryRegion upstream;
+    IDAUInterface *idau;
+} TZMSC;
+
+#endif

From 81a75deb1a2363a7f920e8982af4dc8c8d98a0ed Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:44 +0100
Subject: [PATCH 30/52] hw/misc/iotkit-secctl: Wire up registers for
 controlling MSCs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The IoTKit does not have any Master Security Contollers itself,
but it does provide registers in the secure privilege control
block which allow control of MSCs in the external system.
Add support for these registers.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-13-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/misc/iotkit-secctl.c         | 73 +++++++++++++++++++++++++++++----
 include/hw/misc/iotkit-secctl.h | 14 +++++++
 2 files changed, 79 insertions(+), 8 deletions(-)

diff --git a/hw/misc/iotkit-secctl.c b/hw/misc/iotkit-secctl.c
index de4fd8e36d..2222b3e147 100644
--- a/hw/misc/iotkit-secctl.c
+++ b/hw/misc/iotkit-secctl.c
@@ -190,12 +190,13 @@ static MemTxResult iotkit_secctl_s_read(void *opaque, hwaddr addr,
         r = s->apbexp[offset_to_ppc_idx(offset)].sp;
         break;
     case A_SECMSCINTSTAT:
+        r = s->secmscintstat;
+        break;
     case A_SECMSCINTEN:
+        r = s->secmscinten;
+        break;
     case A_NSMSCEXP:
-        qemu_log_mask(LOG_UNIMP,
-                      "IoTKit SecCtl S block read: "
-                      "unimplemented offset 0x%x\n", offset);
-        r = 0;
+        r = s->nsmscexp;
         break;
     case A_PID4:
     case A_PID5:
@@ -291,6 +292,23 @@ static void iotkit_secctl_ppc_update_irq_enable(IoTKitSecCtlPPC *ppc)
     qemu_set_irq(ppc->irq_enable, extract32(value, ppc->irq_bit_offset, 1));
 }
 
+static void iotkit_secctl_update_mscexp_irqs(qemu_irq *msc_irqs, uint32_t value)
+{
+    int i;
+
+    for (i = 0; i < IOTS_NUM_EXP_MSC; i++) {
+        qemu_set_irq(msc_irqs[i], extract32(value, i + 16, 1));
+    }
+}
+
+static void iotkit_secctl_update_msc_irq(IoTKitSecCtl *s)
+{
+    /* Update the combined MSC IRQ, based on S_MSCEXP_STATUS and S_MSCEXP_EN */
+    bool level = s->secmscintstat & s->secmscinten;
+
+    qemu_set_irq(s->msc_irq, level);
+}
+
 static MemTxResult iotkit_secctl_s_write(void *opaque, hwaddr addr,
                                          uint64_t value,
                                          unsigned size, MemTxAttrs attrs)
@@ -370,10 +388,15 @@ static MemTxResult iotkit_secctl_s_write(void *opaque, hwaddr addr,
         iotkit_secctl_ppc_sp_write(ppc, value);
         break;
     case A_SECMSCINTCLR:
+        iotkit_secctl_update_mscexp_irqs(s->mscexp_clear, value);
+        break;
     case A_SECMSCINTEN:
-        qemu_log_mask(LOG_UNIMP,
-                      "IoTKit SecCtl S block write: "
-                      "unimplemented offset 0x%x\n", offset);
+        s->secmscinten = value;
+        iotkit_secctl_update_msc_irq(s);
+        break;
+    case A_NSMSCEXP:
+        s->nsmscexp = value;
+        iotkit_secctl_update_mscexp_irqs(s->mscexp_ns, value);
         break;
     case A_SECMPCINTSTATUS:
     case A_SECPPCINTSTAT:
@@ -381,7 +404,6 @@ static MemTxResult iotkit_secctl_s_write(void *opaque, hwaddr addr,
     case A_BRGINTSTAT:
     case A_AHBNSPPC0:
     case A_AHBSPPPC0:
-    case A_NSMSCEXP:
     case A_PID4:
     case A_PID5:
     case A_PID6:
@@ -588,6 +610,14 @@ static void iotkit_secctl_mpcexp_status(void *opaque, int n, int level)
     s->mpcintstatus = deposit32(s->mpcintstatus, n + 16, 1, !!level);
 }
 
+static void iotkit_secctl_mscexp_status(void *opaque, int n, int level)
+{
+    IoTKitSecCtl *s = IOTKIT_SECCTL(opaque);
+
+    s->secmscintstat = deposit32(s->secmscintstat, n + 16, 1, !!level);
+    iotkit_secctl_update_msc_irq(s);
+}
+
 static void iotkit_secctl_ppc_irqstatus(void *opaque, int n, int level)
 {
     IoTKitSecCtlPPC *ppc = opaque;
@@ -660,6 +690,14 @@ static void iotkit_secctl_init(Object *obj)
     qdev_init_gpio_in_named(dev, iotkit_secctl_mpcexp_status,
                             "mpcexp_status", IOTS_NUM_EXP_MPC);
 
+    qdev_init_gpio_in_named(dev, iotkit_secctl_mscexp_status,
+                            "mscexp_status", IOTS_NUM_EXP_MSC);
+    qdev_init_gpio_out_named(dev, s->mscexp_clear, "mscexp_clear",
+                             IOTS_NUM_EXP_MSC);
+    qdev_init_gpio_out_named(dev, s->mscexp_ns, "mscexp_ns",
+                             IOTS_NUM_EXP_MSC);
+    qdev_init_gpio_out_named(dev, &s->msc_irq, "msc_irq", 1);
+
     memory_region_init_io(&s->s_regs, obj, &iotkit_secctl_s_ops,
                           s, "iotkit-secctl-s-regs", 0x1000);
     memory_region_init_io(&s->ns_regs, obj, &iotkit_secctl_ns_ops,
@@ -690,6 +728,24 @@ static const VMStateDescription iotkit_secctl_mpcintstatus_vmstate = {
     }
 };
 
+static bool needed_always(void *opaque)
+{
+    return true;
+}
+
+static const VMStateDescription iotkit_secctl_msc_vmstate = {
+    .name = "iotkit-secctl/msc",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = needed_always,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(secmscintstat, IoTKitSecCtl),
+        VMSTATE_UINT32(secmscinten, IoTKitSecCtl),
+        VMSTATE_UINT32(nsmscexp, IoTKitSecCtl),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription iotkit_secctl_vmstate = {
     .name = "iotkit-secctl",
     .version_id = 1,
@@ -710,6 +766,7 @@ static const VMStateDescription iotkit_secctl_vmstate = {
     },
     .subsections = (const VMStateDescription*[]) {
         &iotkit_secctl_mpcintstatus_vmstate,
+        &iotkit_secctl_msc_vmstate,
         NULL
     },
 };
diff --git a/include/hw/misc/iotkit-secctl.h b/include/hw/misc/iotkit-secctl.h
index 082c14c925..1a193b306f 100644
--- a/include/hw/misc/iotkit-secctl.h
+++ b/include/hw/misc/iotkit-secctl.h
@@ -19,6 +19,7 @@
  *  + named GPIO output "sec_resp_cfg" indicating whether blocked accesses
  *    should RAZ/WI or bus error
  *  + named GPIO output "nsc_cfg" whose value tracks the NSCCFG register value
+ *  + named GPIO output "msc_irq" for the combined IRQ line from the MSCs
  * Controlling the 2 APB PPCs in the IoTKit:
  *  + named GPIO outputs apb_ppc0_nonsec[0..2] and apb_ppc1_nonsec
  *  + named GPIO outputs apb_ppc0_ap[0..2] and apb_ppc1_ap
@@ -44,6 +45,11 @@
  * Controlling each of the 16 expansion MPCs which a system using the IoTKit
  * might provide:
  *  + named GPIO inputs mpcexp_status[0..15]
+ * Controlling each of the 16 expansion MSCs which a system using the IoTKit
+ * might provide:
+ *  + named GPIO inputs mscexp_status[0..15]
+ *  + named GPIO outputs mscexp_clear[0..15]
+ *  + named GPIO outputs mscexp_ns[0..15]
  */
 
 #ifndef IOTKIT_SECCTL_H
@@ -62,6 +68,7 @@
 #define IOTS_NUM_AHB_EXP_PPC 4
 #define IOTS_NUM_EXP_MPC 16
 #define IOTS_NUM_MPC 1
+#define IOTS_NUM_EXP_MSC 16
 
 typedef struct IoTKitSecCtl IoTKitSecCtl;
 
@@ -103,6 +110,13 @@ struct IoTKitSecCtl {
     uint32_t brginten;
     uint32_t mpcintstatus;
 
+    uint32_t secmscintstat;
+    uint32_t secmscinten;
+    uint32_t nsmscexp;
+    qemu_irq mscexp_clear[IOTS_NUM_EXP_MSC];
+    qemu_irq mscexp_ns[IOTS_NUM_EXP_MSC];
+    qemu_irq msc_irq;
+
     IoTKitSecCtlPPC apb[IOTS_NUM_APB_PPC];
     IoTKitSecCtlPPC apbexp[IOTS_NUM_APB_EXP_PPC];
     IoTKitSecCtlPPC ahbexp[IOTS_NUM_APB_EXP_PPC];

From 132b475a73574d8c6a7fa678716f2eead1002939 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:44 +0100
Subject: [PATCH 31/52] hw/arm/iotkit: Wire up the lines for MSCs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The IoTKit doesn't have any MSCs itself but it does need
some wiring to connect the external signals from MSCs
in the outer board model up to the registers and the
NVIC IRQ line.

We also need to expose a MemoryRegion corresponding to
the AHB bus, so that MSCs in the outer board model can
use that as their downstream port. (In the FPGA this is
the "AHB Slave Expansion" ports shown in the block
diagram in the AN505 documentation.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-14-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/arm/iotkit.c         | 15 +++++++++++++++
 include/hw/arm/iotkit.h |  8 ++++++++
 2 files changed, 23 insertions(+)

diff --git a/hw/arm/iotkit.c b/hw/arm/iotkit.c
index f8276b5425..8742200fb4 100644
--- a/hw/arm/iotkit.c
+++ b/hw/arm/iotkit.c
@@ -667,6 +667,21 @@ static void iotkit_realize(DeviceState *dev, Error **errp)
 
     iotkit_forward_sec_resp_cfg(s);
 
+    /* Forward the MSC related signals */
+    qdev_pass_gpios(dev_secctl, dev, "mscexp_status");
+    qdev_pass_gpios(dev_secctl, dev, "mscexp_clear");
+    qdev_pass_gpios(dev_secctl, dev, "mscexp_ns");
+    qdev_connect_gpio_out_named(dev_secctl, "msc_irq", 0,
+                                qdev_get_gpio_in(DEVICE(&s->armv7m), 11));
+
+    /*
+     * Expose our container region to the board model; this corresponds
+     * to the AHB Slave Expansion ports which allow bus master devices
+     * (eg DMA controllers) in the board model to make transactions into
+     * devices in the IoTKit.
+     */
+    sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->container);
+
     system_clock_scale = NANOSECONDS_PER_SECOND / s->mainclk_frq;
 }
 
diff --git a/include/hw/arm/iotkit.h b/include/hw/arm/iotkit.h
index 426dc326a0..3a8ee63908 100644
--- a/include/hw/arm/iotkit.h
+++ b/include/hw/arm/iotkit.h
@@ -28,6 +28,9 @@
  *  + QOM property "EXP_NUMIRQ" sets the number of expansion interrupts
  *  + Named GPIO inputs "EXP_IRQ" 0..n are the expansion interrupts, which
  *    are wired to the NVIC lines 32 .. n+32
+ *  + sysbus MMIO region 0 is the "AHB Slave Expansion" which allows
+ *    bus master devices in the board model to make transactions into
+ *    all the devices and memory areas in the IoTKit
  * Controlling up to 4 AHB expansion PPBs which a system using the IoTKit
  * might provide:
  *  + named GPIO outputs apb_ppcexp{0,1,2,3}_nonsec[0..15]
@@ -45,6 +48,11 @@
  * Controlling each of the 16 expansion MPCs which a system using the IoTKit
  * might provide:
  *  + named GPIO inputs mpcexp_status[0..15]
+ * Controlling each of the 16 expansion MSCs which a system using the IoTKit
+ * might provide:
+ *  + named GPIO inputs mscexp_status[0..15]
+ *  + named GPIO outputs mscexp_clear[0..15]
+ *  + named GPIO outputs mscexp_ns[0..15]
  */
 
 #ifndef IOTKIT_H

From 28e56f05fc688917cf35c39c0ba97afb7f1ab0f3 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:44 +0100
Subject: [PATCH 32/52] hw/arm/mps2-tz: Create PL081s and MSCs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The AN505 FPGA image includes four PL081 DMA controllers, each
of which is gated by a Master Security Controller that allows
the guest to prevent a non-secure DMA controller from accessing
memory that is used by secure guest code. Create and wire
up these devices.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-15-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/arm/mps2-tz.c | 100 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 93 insertions(+), 7 deletions(-)

diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index dc0f34abe5..d810e51a1b 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -45,7 +45,9 @@
 #include "hw/misc/mps2-scc.h"
 #include "hw/misc/mps2-fpgaio.h"
 #include "hw/misc/tz-mpc.h"
+#include "hw/misc/tz-msc.h"
 #include "hw/arm/iotkit.h"
+#include "hw/dma/pl080.h"
 #include "hw/devices.h"
 #include "net/net.h"
 #include "hw/core/split-irq.h"
@@ -75,8 +77,9 @@ typedef struct {
     UnimplementedDeviceState i2c[4];
     UnimplementedDeviceState i2s_audio;
     UnimplementedDeviceState gpio[4];
-    UnimplementedDeviceState dma[4];
     UnimplementedDeviceState gfx;
+    PL080State dma[4];
+    TZMSC msc[4];
     CMSDKAPBUART uart[5];
     SplitIRQ sec_resp_splitter;
     qemu_or_irq uart_irq_orgate;
@@ -263,6 +266,64 @@ static MemoryRegion *make_mpc(MPS2TZMachineState *mms, void *opaque,
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(mpc), 0);
 }
 
+static MemoryRegion *make_dma(MPS2TZMachineState *mms, void *opaque,
+                              const char *name, hwaddr size)
+{
+    PL080State *dma = opaque;
+    int i = dma - &mms->dma[0];
+    SysBusDevice *s;
+    char *mscname = g_strdup_printf("%s-msc", name);
+    TZMSC *msc = &mms->msc[i];
+    DeviceState *iotkitdev = DEVICE(&mms->iotkit);
+    MemoryRegion *msc_upstream;
+    MemoryRegion *msc_downstream;
+
+    /*
+     * Each DMA device is a PL081 whose transaction master interface
+     * is guarded by a Master Security Controller. The downstream end of
+     * the MSC connects to the IoTKit AHB Slave Expansion port, so the
+     * DMA devices can see all devices and memory that the CPU does.
+     */
+    sysbus_init_child_obj(OBJECT(mms), mscname, msc, sizeof(*msc), TYPE_TZ_MSC);
+    msc_downstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(&mms->iotkit), 0);
+    object_property_set_link(OBJECT(msc), OBJECT(msc_downstream),
+                             "downstream", &error_fatal);
+    object_property_set_link(OBJECT(msc), OBJECT(mms),
+                             "idau", &error_fatal);
+    object_property_set_bool(OBJECT(msc), true, "realized", &error_fatal);
+
+    qdev_connect_gpio_out_named(DEVICE(msc), "irq", 0,
+                                qdev_get_gpio_in_named(iotkitdev,
+                                                       "mscexp_status", i));
+    qdev_connect_gpio_out_named(iotkitdev, "mscexp_clear", i,
+                                qdev_get_gpio_in_named(DEVICE(msc),
+                                                       "irq_clear", 0));
+    qdev_connect_gpio_out_named(iotkitdev, "mscexp_ns", i,
+                                qdev_get_gpio_in_named(DEVICE(msc),
+                                                       "cfg_nonsec", 0));
+    qdev_connect_gpio_out(DEVICE(&mms->sec_resp_splitter),
+                          ARRAY_SIZE(mms->ppc) + i,
+                          qdev_get_gpio_in_named(DEVICE(msc),
+                                                 "cfg_sec_resp", 0));
+    msc_upstream = sysbus_mmio_get_region(SYS_BUS_DEVICE(msc), 0);
+
+    sysbus_init_child_obj(OBJECT(mms), name, dma, sizeof(*dma), TYPE_PL081);
+    object_property_set_link(OBJECT(dma), OBJECT(msc_upstream),
+                             "downstream", &error_fatal);
+    object_property_set_bool(OBJECT(dma), true, "realized", &error_fatal);
+
+    s = SYS_BUS_DEVICE(dma);
+    /* Wire up DMACINTR, DMACINTERR, DMACINTTC */
+    sysbus_connect_irq(s, 0, qdev_get_gpio_in_named(iotkitdev,
+                                                    "EXP_IRQ", 58 + i * 3));
+    sysbus_connect_irq(s, 1, qdev_get_gpio_in_named(iotkitdev,
+                                                    "EXP_IRQ", 56 + i * 3));
+    sysbus_connect_irq(s, 2, qdev_get_gpio_in_named(iotkitdev,
+                                                    "EXP_IRQ", 57 + i * 3));
+
+    return sysbus_mmio_get_region(s, 0);
+}
+
 static void mps2tz_common_init(MachineState *machine)
 {
     MPS2TZMachineState *mms = MPS2TZ_MACHINE(machine);
@@ -289,13 +350,14 @@ static void mps2tz_common_init(MachineState *machine)
                              &error_fatal);
 
     /* The sec_resp_cfg output from the IoTKit must be split into multiple
-     * lines, one for each of the PPCs we create here.
+     * lines, one for each of the PPCs we create here, plus one per MSC.
      */
     object_initialize(&mms->sec_resp_splitter, sizeof(mms->sec_resp_splitter),
                       TYPE_SPLIT_IRQ);
     object_property_add_child(OBJECT(machine), "sec-resp-splitter",
                               OBJECT(&mms->sec_resp_splitter), &error_abort);
-    object_property_set_int(OBJECT(&mms->sec_resp_splitter), 5,
+    object_property_set_int(OBJECT(&mms->sec_resp_splitter),
+                            ARRAY_SIZE(mms->ppc) + ARRAY_SIZE(mms->msc),
                             "num-lines", &error_fatal);
     object_property_set_bool(OBJECT(&mms->sec_resp_splitter), true,
                              "realized", &error_fatal);
@@ -396,10 +458,10 @@ static void mps2tz_common_init(MachineState *machine)
         }, {
             .name = "ahb_ppcexp1",
             .ports = {
-                { "dma0", make_unimp_dev, &mms->dma[0], 0x40110000, 0x1000 },
-                { "dma1", make_unimp_dev, &mms->dma[1], 0x40111000, 0x1000 },
-                { "dma2", make_unimp_dev, &mms->dma[2], 0x40112000, 0x1000 },
-                { "dma3", make_unimp_dev, &mms->dma[3], 0x40113000, 0x1000 },
+                { "dma0", make_dma, &mms->dma[0], 0x40110000, 0x1000 },
+                { "dma1", make_dma, &mms->dma[1], 0x40111000, 0x1000 },
+                { "dma2", make_dma, &mms->dma[2], 0x40112000, 0x1000 },
+                { "dma3", make_dma, &mms->dma[3], 0x40113000, 0x1000 },
             },
         },
     };
@@ -480,12 +542,32 @@ static void mps2tz_common_init(MachineState *machine)
     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, 0x400000);
 }
 
+static void mps2_tz_idau_check(IDAUInterface *ii, uint32_t address,
+                               int *iregion, bool *exempt, bool *ns, bool *nsc)
+{
+    /*
+     * The MPS2 TZ FPGA images have IDAUs in them which are connected to
+     * the Master Security Controllers. Thes have the same logic as
+     * is used by the IoTKit for the IDAU connected to the CPU, except
+     * that MSCs don't care about the NSC attribute.
+     */
+    int region = extract32(address, 28, 4);
+
+    *ns = !(region & 1);
+    *nsc = false;
+    /* 0xe0000000..0xe00fffff and 0xf0000000..0xf00fffff are exempt */
+    *exempt = (address & 0xeff00000) == 0xe0000000;
+    *iregion = region;
+}
+
 static void mps2tz_class_init(ObjectClass *oc, void *data)
 {
     MachineClass *mc = MACHINE_CLASS(oc);
+    IDAUInterfaceClass *iic = IDAU_INTERFACE_CLASS(oc);
 
     mc->init = mps2tz_common_init;
     mc->max_cpus = 1;
+    iic->check = mps2_tz_idau_check;
 }
 
 static void mps2tz_an505_class_init(ObjectClass *oc, void *data)
@@ -506,6 +588,10 @@ static const TypeInfo mps2tz_info = {
     .instance_size = sizeof(MPS2TZMachineState),
     .class_size = sizeof(MPS2TZMachineClass),
     .class_init = mps2tz_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_IDAU_INTERFACE },
+        { }
+    },
 };
 
 static const TypeInfo mps2tz_an505_info = {

From 1d52866f5a53feef036c2e8f9b3a6a30209d48a7 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:44 +0100
Subject: [PATCH 33/52] hw/ssi/pl022: Allow use as embedded-struct device
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Create a new include file for the pl022's device struct,
type macros, etc, so that it can be instantiated using
the "embedded struct" coding style.

While we're adding the new file to MAINTAINERS, add
also the .c file, which was missing an entry.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-16-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 MAINTAINERS            |  2 ++
 hw/ssi/pl022.c         | 26 +--------------------
 include/hw/ssi/pl022.h | 51 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 54 insertions(+), 25 deletions(-)
 create mode 100644 include/hw/ssi/pl022.h

diff --git a/MAINTAINERS b/MAINTAINERS
index abbaccc475..53a8b931bb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -451,6 +451,8 @@ F: hw/gpio/pl061.c
 F: hw/input/pl050.c
 F: hw/intc/pl190.c
 F: hw/sd/pl181.c
+F: hw/ssi/pl022.c
+F: include/hw/ssi/pl022.h
 F: hw/timer/pl031.c
 F: include/hw/arm/primecell.h
 F: hw/timer/cmsdk-apb-timer.c
diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index c1368018ee..379d309398 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -9,6 +9,7 @@
 
 #include "qemu/osdep.h"
 #include "hw/sysbus.h"
+#include "hw/ssi/pl022.h"
 #include "hw/ssi/ssi.h"
 #include "qemu/log.h"
 
@@ -41,31 +42,6 @@ do { fprintf(stderr, "pl022: error: " fmt , ## __VA_ARGS__);} while (0)
 #define PL022_INT_RX  0x04
 #define PL022_INT_TX  0x08
 
-#define TYPE_PL022 "pl022"
-#define PL022(obj) OBJECT_CHECK(PL022State, (obj), TYPE_PL022)
-
-typedef struct PL022State {
-    SysBusDevice parent_obj;
-
-    MemoryRegion iomem;
-    uint32_t cr0;
-    uint32_t cr1;
-    uint32_t bitmask;
-    uint32_t sr;
-    uint32_t cpsr;
-    uint32_t is;
-    uint32_t im;
-    /* The FIFO head points to the next empty entry.  */
-    int tx_fifo_head;
-    int rx_fifo_head;
-    int tx_fifo_len;
-    int rx_fifo_len;
-    uint16_t tx_fifo[8];
-    uint16_t rx_fifo[8];
-    qemu_irq irq;
-    SSIBus *ssi;
-} PL022State;
-
 static const unsigned char pl022_id[8] =
   { 0x22, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
 
diff --git a/include/hw/ssi/pl022.h b/include/hw/ssi/pl022.h
new file mode 100644
index 0000000000..a080519366
--- /dev/null
+++ b/include/hw/ssi/pl022.h
@@ -0,0 +1,51 @@
+/*
+ * ARM PrimeCell PL022 Synchronous Serial Port
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or
+ * (at your option) any later version.
+ */
+
+/* This is a model of the Arm PrimeCell PL022 synchronous serial port.
+ * The PL022 TRM is:
+ * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0194h/DDI0194H_ssp_pl022_trm.pdf
+ *
+ * QEMU interface:
+ * + sysbus IRQ: SSPINTR combined interrupt line
+ * + sysbus MMIO region 0: MemoryRegion for the device's registers
+ */
+
+#ifndef HW_SSI_PL022_H
+#define HW_SSI_PL022_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_PL022 "pl022"
+#define PL022(obj) OBJECT_CHECK(PL022State, (obj), TYPE_PL022)
+
+typedef struct PL022State {
+    SysBusDevice parent_obj;
+
+    MemoryRegion iomem;
+    uint32_t cr0;
+    uint32_t cr1;
+    uint32_t bitmask;
+    uint32_t sr;
+    uint32_t cpsr;
+    uint32_t is;
+    uint32_t im;
+    /* The FIFO head points to the next empty entry.  */
+    int tx_fifo_head;
+    int rx_fifo_head;
+    int tx_fifo_len;
+    int rx_fifo_len;
+    uint16_t tx_fifo[8];
+    uint16_t rx_fifo[8];
+    qemu_irq irq;
+    SSIBus *ssi;
+} PL022State;
+
+#endif

From 66d9aa790fa9d5c251dcbd5b8ff1db79e04dc06d Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:45 +0100
Subject: [PATCH 34/52] hw/ssi/pl022: Set up reset function in class init
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Currently the PL022 calls pl022_reset() from its class init
function. Make it register a DeviceState reset method instead,
so that we reset the device on system reset.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-17-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/ssi/pl022.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index 379d309398..0b5f90b857 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -203,8 +203,10 @@ static void pl022_write(void *opaque, hwaddr offset,
     }
 }
 
-static void pl022_reset(PL022State *s)
+static void pl022_reset(DeviceState *dev)
 {
+    PL022State *s = PL022(dev);
+
     s->rx_fifo_len = 0;
     s->tx_fifo_len = 0;
     s->im = 0;
@@ -277,7 +279,6 @@ static int pl022_init(SysBusDevice *sbd)
     sysbus_init_mmio(sbd, &s->iomem);
     sysbus_init_irq(sbd, &s->irq);
     s->ssi = ssi_create_bus(dev, "ssi");
-    pl022_reset(s);
     vmstate_register(dev, -1, &vmstate_pl022, s);
     return 0;
 }
@@ -285,8 +286,10 @@ static int pl022_init(SysBusDevice *sbd)
 static void pl022_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
 
     sdc->init = pl022_init;
+    dc->reset = pl022_reset;
 }
 
 static const TypeInfo pl022_info = {

From 275ff67f40b60592d5c4e709ead1fe3e41b2ece5 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:45 +0100
Subject: [PATCH 35/52] hw/ssi/pl022: Don't directly call vmstate_register()

Use the DeviceState vmsd pointer rather than calling vmstate_register()
directly.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-18-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/ssi/pl022.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index 0b5f90b857..c998953706 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -279,7 +279,6 @@ static int pl022_init(SysBusDevice *sbd)
     sysbus_init_mmio(sbd, &s->iomem);
     sysbus_init_irq(sbd, &s->irq);
     s->ssi = ssi_create_bus(dev, "ssi");
-    vmstate_register(dev, -1, &vmstate_pl022, s);
     return 0;
 }
 
@@ -290,6 +289,7 @@ static void pl022_class_init(ObjectClass *klass, void *data)
 
     sdc->init = pl022_init;
     dc->reset = pl022_reset;
+    dc->vmsd = &vmstate_pl022;
 }
 
 static const TypeInfo pl022_info = {

From 13391a563fc4048736d259b685676b02dd0ba52d Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:45 +0100
Subject: [PATCH 36/52] hw/ssi/pl022: Use DeviceState::realize rather than
 SysBusDevice::init
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Move from the legacy SysBusDevice::init method to using
DeviceState::realize.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180820141116.9118-19-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/ssi/pl022.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index c998953706..3ac57f4c96 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -270,26 +270,24 @@ static const VMStateDescription vmstate_pl022 = {
     }
 };
 
-static int pl022_init(SysBusDevice *sbd)
+static void pl022_realize(DeviceState *dev, Error **errp)
 {
-    DeviceState *dev = DEVICE(sbd);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     PL022State *s = PL022(dev);
 
     memory_region_init_io(&s->iomem, OBJECT(s), &pl022_ops, s, "pl022", 0x1000);
     sysbus_init_mmio(sbd, &s->iomem);
     sysbus_init_irq(sbd, &s->irq);
     s->ssi = ssi_create_bus(dev, "ssi");
-    return 0;
 }
 
 static void pl022_class_init(ObjectClass *klass, void *data)
 {
-    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    sdc->init = pl022_init;
     dc->reset = pl022_reset;
     dc->vmsd = &vmstate_pl022;
+    dc->realize = pl022_realize;
 }
 
 static const TypeInfo pl022_info = {

From 139d941e5a61d29c895ab422031eb7fd8797e059 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:46 +0100
Subject: [PATCH 37/52] hw/ssi/pl022: Correct wrong value for PL022_INT_RT

The PL022 interrupt registers have bits allocated as:
 0: ROR (receive overrun)
 1: RT (receive timeout)
 2: RX (receive FIFO half full or less)
 3: TX (transmit FIFO half full or less)

A cut and paste error meant we had the wrong value for
the PL022_INT_RT constant. This bug doesn't affect device
behaviour, because we don't implement the receive timeout
feature and so never set that interrupt bit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-20-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/ssi/pl022.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index 3ac57f4c96..d310671d18 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -38,7 +38,7 @@ do { fprintf(stderr, "pl022: error: " fmt , ## __VA_ARGS__);} while (0)
 #define PL022_SR_BSY  0x10
 
 #define PL022_INT_ROR 0x01
-#define PL022_INT_RT  0x04
+#define PL022_INT_RT  0x02
 #define PL022_INT_RX  0x04
 #define PL022_INT_TX  0x08
 

From 7d3912f54e74a16dc69c1e427396ebef58ff4976 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:46 +0100
Subject: [PATCH 38/52] hw/ssi/pl022: Correct wrong DMACR and ICR handling

In the PL022, register offset 0x20 is the ICR, a write-only
interrupt-clear register.  Register offset 0x24 is DMACR, the DMA
control register.  We were incorrectly implementing (a stub version
of) DMACR at 0x20, and not implementing anything at 0x24.  Fix this
bug.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-21-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/ssi/pl022.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/hw/ssi/pl022.c b/hw/ssi/pl022.c
index d310671d18..e58247554c 100644
--- a/hw/ssi/pl022.c
+++ b/hw/ssi/pl022.c
@@ -146,7 +146,7 @@ static uint64_t pl022_read(void *opaque, hwaddr offset,
         return s->is;
     case 0x1c: /* MIS */
         return s->im & s->is;
-    case 0x20: /* DMACR */
+    case 0x24: /* DMACR */
         /* Not implemented.  */
         return 0;
     default:
@@ -192,7 +192,15 @@ static void pl022_write(void *opaque, hwaddr offset,
         s->im = value;
         pl022_update(s);
         break;
-    case 0x20: /* DMACR */
+    case 0x20: /* ICR */
+        /*
+         * write-1-to-clear: bit 0 clears ROR, bit 1 clears RT;
+         * RX and TX interrupts cannot be cleared this way.
+         */
+        value &= PL022_INT_ROR | PL022_INT_RT;
+        s->is &= ~value;
+        break;
+    case 0x24: /* DMACR */
         if (value) {
             qemu_log_mask(LOG_UNIMP, "pl022: DMA not implemented\n");
         }

From 0d49759b97cb8b62079921c631179ebd6b716a27 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:47 +0100
Subject: [PATCH 39/52] hw/arm/mps2-tz: Instantiate SPI controllers

The SPI controllers in the MPS2 AN505 board are PL022s.
We have a model of the PL022, so create these devices.

We don't currently model the LCD controller that sits behind
one of the PL022s; the others are intended to control devices
that sit on the FPGA's general purpose SPI connector or
"shield" expansion connectors.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-22-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/arm/mps2-tz.c | 38 ++++++++++++++++++++++++++++++++------
 1 file changed, 32 insertions(+), 6 deletions(-)

diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index d810e51a1b..cedf605e20 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -48,6 +48,7 @@
 #include "hw/misc/tz-msc.h"
 #include "hw/arm/iotkit.h"
 #include "hw/dma/pl080.h"
+#include "hw/ssi/pl022.h"
 #include "hw/devices.h"
 #include "net/net.h"
 #include "hw/core/split-irq.h"
@@ -73,7 +74,7 @@ typedef struct {
     MPS2FPGAIO fpgaio;
     TZPPC ppc[5];
     TZMPC ssram_mpc[3];
-    UnimplementedDeviceState spi[5];
+    PL022State spi[5];
     UnimplementedDeviceState i2c[4];
     UnimplementedDeviceState i2s_audio;
     UnimplementedDeviceState gpio[4];
@@ -324,6 +325,31 @@ static MemoryRegion *make_dma(MPS2TZMachineState *mms, void *opaque,
     return sysbus_mmio_get_region(s, 0);
 }
 
+static MemoryRegion *make_spi(MPS2TZMachineState *mms, void *opaque,
+                              const char *name, hwaddr size)
+{
+    /*
+     * The AN505 has five PL022 SPI controllers.
+     * One of these should have the LCD controller behind it; the others
+     * are connected only to the FPGA's "general purpose SPI connector"
+     * or "shield" expansion connectors.
+     * Note that if we do implement devices behind SPI, the chip select
+     * lines are set via the "MISC" register in the MPS2 FPGAIO device.
+     */
+    PL022State *spi = opaque;
+    int i = spi - &mms->spi[0];
+    DeviceState *iotkitdev = DEVICE(&mms->iotkit);
+    SysBusDevice *s;
+
+    sysbus_init_child_obj(OBJECT(mms), name, spi, sizeof(mms->spi[0]),
+                          TYPE_PL022);
+    object_property_set_bool(OBJECT(spi), true, "realized", &error_fatal);
+    s = SYS_BUS_DEVICE(spi);
+    sysbus_connect_irq(s, 0,
+                       qdev_get_gpio_in_named(iotkitdev, "EXP_IRQ", 51 + i));
+    return sysbus_mmio_get_region(s, 0);
+}
+
 static void mps2tz_common_init(MachineState *machine)
 {
     MPS2TZMachineState *mms = MPS2TZ_MACHINE(machine);
@@ -422,11 +448,11 @@ static void mps2tz_common_init(MachineState *machine)
         }, {
             .name = "apb_ppcexp1",
             .ports = {
-                { "spi0", make_unimp_dev, &mms->spi[0], 0x40205000, 0x1000 },
-                { "spi1", make_unimp_dev, &mms->spi[1], 0x40206000, 0x1000 },
-                { "spi2", make_unimp_dev, &mms->spi[2], 0x40209000, 0x1000 },
-                { "spi3", make_unimp_dev, &mms->spi[3], 0x4020a000, 0x1000 },
-                { "spi4", make_unimp_dev, &mms->spi[4], 0x4020b000, 0x1000 },
+                { "spi0", make_spi, &mms->spi[0], 0x40205000, 0x1000 },
+                { "spi1", make_spi, &mms->spi[1], 0x40206000, 0x1000 },
+                { "spi2", make_spi, &mms->spi[2], 0x40209000, 0x1000 },
+                { "spi3", make_spi, &mms->spi[3], 0x4020a000, 0x1000 },
+                { "spi4", make_spi, &mms->spi[4], 0x4020b000, 0x1000 },
                 { "uart0", make_uart, &mms->uart[0], 0x40200000, 0x1000 },
                 { "uart1", make_uart, &mms->uart[1], 0x40201000, 0x1000 },
                 { "uart2", make_uart, &mms->uart[2], 0x40202000, 0x1000 },

From cb159db944b290a4704603baa8b96facde634521 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:47 +0100
Subject: [PATCH 40/52] hw/arm/mps2-tz: Fix MPS2 SCC config register values

Some of the config register values we were setting for the MPS2 SCC
weren't correct:
 * the SCC_AID bits [23:20] specify the FPGA build target board revision,
   and the SCC_CFG4 register specifies the actual board revision, so
   these should have matching values. Claim to be board revision C,
   consistently -- we had the revision in the wrong part of SCC_AID.
 * SCC_ID bits [15:4] should be 0x505, not decimal 505

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180820141116.9118-23-peter.maydell@linaro.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 hw/arm/mps2-tz.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index cedf605e20..6dd02ae47e 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -192,7 +192,7 @@ static MemoryRegion *make_scc(MPS2TZMachineState *mms, void *opaque,
     sccdev = DEVICE(scc);
     qdev_set_parent_bus(sccdev, sysbus_get_default());
     qdev_prop_set_uint32(sccdev, "scc-cfg4", 0x2);
-    qdev_prop_set_uint32(sccdev, "scc-aid", 0x02000008);
+    qdev_prop_set_uint32(sccdev, "scc-aid", 0x00200008);
     qdev_prop_set_uint32(sccdev, "scc-id", mmc->scc_id);
     object_property_set_bool(OBJECT(scc), true, "realized", &error_fatal);
     return sysbus_mmio_get_region(SYS_BUS_DEVICE(sccdev), 0);
@@ -604,7 +604,7 @@ static void mps2tz_an505_class_init(ObjectClass *oc, void *data)
     mc->desc = "ARM MPS2 with AN505 FPGA image for Cortex-M33";
     mmc->fpga_type = FPGA_AN505;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m33");
-    mmc->scc_id = 0x41040000 | (505 << 4);
+    mmc->scc_id = 0x41045050;
 }
 
 static const TypeInfo mps2tz_info = {

From d00584b7cfab3e38f8264bebfcb6fdb02c887ade Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:47 +0100
Subject: [PATCH 41/52] target/arm: Untabify translate.c

Untabify the arm translate.c. This affects only some lines,
mostly comments, in the iwMMXt code. We've never touched
that code in years, so it's not going to get fixed up
by our "change when touched" process, and a bulk change
is not going to be too disruptive.

This commit was produced using Emacs "untabify"; it is
a whitespace-only change.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180821165215.29069-2-peter.maydell@linaro.org
---
 target/arm/translate.c | 122 ++++++++++++++++++++---------------------
 1 file changed, 61 insertions(+), 61 deletions(-)

diff --git a/target/arm/translate.c b/target/arm/translate.c
index bcfc29c5a6..c6a5d2ac44 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -1627,7 +1627,7 @@ static inline void gen_mov_vreg_F0(int dp, int reg)
         tcg_gen_st_f32(cpu_F0s, cpu_env, vfp_reg_offset(dp, reg));
 }
 
-#define ARM_CP_RW_BIT	(1 << 20)
+#define ARM_CP_RW_BIT   (1 << 20)
 
 static inline void iwmmxt_load_reg(TCGv_i64 var, int reg)
 {
@@ -1861,12 +1861,12 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
             wrd = insn & 0xf;
             rdlo = (insn >> 12) & 0xf;
             rdhi = (insn >> 16) & 0xf;
-            if (insn & ARM_CP_RW_BIT) {			/* TMRRC */
+            if (insn & ARM_CP_RW_BIT) {                         /* TMRRC */
                 iwmmxt_load_reg(cpu_V0, wrd);
                 tcg_gen_extrl_i64_i32(cpu_R[rdlo], cpu_V0);
                 tcg_gen_shri_i64(cpu_V0, cpu_V0, 32);
                 tcg_gen_extrl_i64_i32(cpu_R[rdhi], cpu_V0);
-            } else {					/* TMCRR */
+            } else {                                    /* TMCRR */
                 tcg_gen_concat_i32_i64(cpu_V0, cpu_R[rdlo], cpu_R[rdhi]);
                 iwmmxt_store_reg(cpu_V0, wrd);
                 gen_op_iwmmxt_set_mup();
@@ -1881,25 +1881,25 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
             return 1;
         }
         if (insn & ARM_CP_RW_BIT) {
-            if ((insn >> 28) == 0xf) {			/* WLDRW wCx */
+            if ((insn >> 28) == 0xf) {                  /* WLDRW wCx */
                 tmp = tcg_temp_new_i32();
                 gen_aa32_ld32u(s, tmp, addr, get_mem_index(s));
                 iwmmxt_store_creg(wrd, tmp);
             } else {
                 i = 1;
                 if (insn & (1 << 8)) {
-                    if (insn & (1 << 22)) {		/* WLDRD */
+                    if (insn & (1 << 22)) {             /* WLDRD */
                         gen_aa32_ld64(s, cpu_M0, addr, get_mem_index(s));
                         i = 0;
-                    } else {				/* WLDRW wRd */
+                    } else {                            /* WLDRW wRd */
                         tmp = tcg_temp_new_i32();
                         gen_aa32_ld32u(s, tmp, addr, get_mem_index(s));
                     }
                 } else {
                     tmp = tcg_temp_new_i32();
-                    if (insn & (1 << 22)) {		/* WLDRH */
+                    if (insn & (1 << 22)) {             /* WLDRH */
                         gen_aa32_ld16u(s, tmp, addr, get_mem_index(s));
-                    } else {				/* WLDRB */
+                    } else {                            /* WLDRB */
                         gen_aa32_ld8u(s, tmp, addr, get_mem_index(s));
                     }
                 }
@@ -1910,24 +1910,24 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
                 gen_op_iwmmxt_movq_wRn_M0(wrd);
             }
         } else {
-            if ((insn >> 28) == 0xf) {			/* WSTRW wCx */
+            if ((insn >> 28) == 0xf) {                  /* WSTRW wCx */
                 tmp = iwmmxt_load_creg(wrd);
                 gen_aa32_st32(s, tmp, addr, get_mem_index(s));
             } else {
                 gen_op_iwmmxt_movq_M0_wRn(wrd);
                 tmp = tcg_temp_new_i32();
                 if (insn & (1 << 8)) {
-                    if (insn & (1 << 22)) {		/* WSTRD */
+                    if (insn & (1 << 22)) {             /* WSTRD */
                         gen_aa32_st64(s, cpu_M0, addr, get_mem_index(s));
-                    } else {				/* WSTRW wRd */
+                    } else {                            /* WSTRW wRd */
                         tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                         gen_aa32_st32(s, tmp, addr, get_mem_index(s));
                     }
                 } else {
-                    if (insn & (1 << 22)) {		/* WSTRH */
+                    if (insn & (1 << 22)) {             /* WSTRH */
                         tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                         gen_aa32_st16(s, tmp, addr, get_mem_index(s));
-                    } else {				/* WSTRB */
+                    } else {                            /* WSTRB */
                         tcg_gen_extrl_i64_i32(tmp, cpu_M0);
                         gen_aa32_st8(s, tmp, addr, get_mem_index(s));
                     }
@@ -1943,7 +1943,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         return 1;
 
     switch (((insn >> 12) & 0xf00) | ((insn >> 4) & 0xff)) {
-    case 0x000:						/* WOR */
+    case 0x000:                                                 /* WOR */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 0) & 0xf;
         rd1 = (insn >> 16) & 0xf;
@@ -1954,7 +1954,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x011:						/* TMCR */
+    case 0x011:                                                 /* TMCR */
         if (insn & 0xf)
             return 1;
         rd = (insn >> 12) & 0xf;
@@ -1985,7 +1985,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
             return 1;
         }
         break;
-    case 0x100:						/* WXOR */
+    case 0x100:                                                 /* WXOR */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 0) & 0xf;
         rd1 = (insn >> 16) & 0xf;
@@ -1996,7 +1996,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x111:						/* TMRC */
+    case 0x111:                                                 /* TMRC */
         if (insn & 0xf)
             return 1;
         rd = (insn >> 12) & 0xf;
@@ -2004,7 +2004,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         tmp = iwmmxt_load_creg(wrd);
         store_reg(s, rd, tmp);
         break;
-    case 0x300:						/* WANDN */
+    case 0x300:                                                 /* WANDN */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 0) & 0xf;
         rd1 = (insn >> 16) & 0xf;
@@ -2016,7 +2016,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x200:						/* WAND */
+    case 0x200:                                                 /* WAND */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 0) & 0xf;
         rd1 = (insn >> 16) & 0xf;
@@ -2027,7 +2027,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x810: case 0xa10:				/* WMADD */
+    case 0x810: case 0xa10:                             /* WMADD */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 0) & 0xf;
         rd1 = (insn >> 16) & 0xf;
@@ -2039,7 +2039,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x10e: case 0x50e: case 0x90e: case 0xd0e:	/* WUNPCKIL */
+    case 0x10e: case 0x50e: case 0x90e: case 0xd0e:     /* WUNPCKIL */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2061,7 +2061,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x10c: case 0x50c: case 0x90c: case 0xd0c:	/* WUNPCKIH */
+    case 0x10c: case 0x50c: case 0x90c: case 0xd0c:     /* WUNPCKIH */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2083,7 +2083,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x012: case 0x112: case 0x412: case 0x512:	/* WSAD */
+    case 0x012: case 0x112: case 0x412: case 0x512:     /* WSAD */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2097,7 +2097,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x010: case 0x110: case 0x210: case 0x310:	/* WMUL */
+    case 0x010: case 0x110: case 0x210: case 0x310:     /* WMUL */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2116,7 +2116,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x410: case 0x510: case 0x610: case 0x710:	/* WMAC */
+    case 0x410: case 0x510: case 0x610: case 0x710:     /* WMAC */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2132,7 +2132,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x006: case 0x406: case 0x806: case 0xc06:	/* WCMPEQ */
+    case 0x006: case 0x406: case 0x806: case 0xc06:     /* WCMPEQ */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2154,7 +2154,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x800: case 0x900: case 0xc00: case 0xd00:	/* WAVG2 */
+    case 0x800: case 0x900: case 0xc00: case 0xd00:     /* WAVG2 */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2174,7 +2174,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x802: case 0x902: case 0xa02: case 0xb02:	/* WALIGNR */
+    case 0x802: case 0x902: case 0xa02: case 0xb02:     /* WALIGNR */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         rd1 = (insn >> 0) & 0xf;
@@ -2187,7 +2187,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x601: case 0x605: case 0x609: case 0x60d:	/* TINSR */
+    case 0x601: case 0x605: case 0x609: case 0x60d:     /* TINSR */
         if (((insn >> 6) & 3) == 3)
             return 1;
         rd = (insn >> 12) & 0xf;
@@ -2218,7 +2218,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x107: case 0x507: case 0x907: case 0xd07:	/* TEXTRM */
+    case 0x107: case 0x507: case 0x907: case 0xd07:     /* TEXTRM */
         rd = (insn >> 12) & 0xf;
         wrd = (insn >> 16) & 0xf;
         if (rd == 15 || ((insn >> 22) & 3) == 3)
@@ -2251,7 +2251,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         }
         store_reg(s, rd, tmp);
         break;
-    case 0x117: case 0x517: case 0x917: case 0xd17:	/* TEXTRC */
+    case 0x117: case 0x517: case 0x917: case 0xd17:     /* TEXTRC */
         if ((insn & 0x000ff008) != 0x0003f000 || ((insn >> 22) & 3) == 3)
             return 1;
         tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
@@ -2270,7 +2270,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_set_nzcv(tmp);
         tcg_temp_free_i32(tmp);
         break;
-    case 0x401: case 0x405: case 0x409: case 0x40d:	/* TBCST */
+    case 0x401: case 0x405: case 0x409: case 0x40d:     /* TBCST */
         if (((insn >> 6) & 3) == 3)
             return 1;
         rd = (insn >> 12) & 0xf;
@@ -2291,7 +2291,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x113: case 0x513: case 0x913: case 0xd13:	/* TANDC */
+    case 0x113: case 0x513: case 0x913: case 0xd13:     /* TANDC */
         if ((insn & 0x000ff00f) != 0x0003f000 || ((insn >> 22) & 3) == 3)
             return 1;
         tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
@@ -2319,7 +2319,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         tcg_temp_free_i32(tmp2);
         tcg_temp_free_i32(tmp);
         break;
-    case 0x01c: case 0x41c: case 0x81c: case 0xc1c:	/* WACC */
+    case 0x01c: case 0x41c: case 0x81c: case 0xc1c:     /* WACC */
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         gen_op_iwmmxt_movq_M0_wRn(rd0);
@@ -2339,7 +2339,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x115: case 0x515: case 0x915: case 0xd15:	/* TORC */
+    case 0x115: case 0x515: case 0x915: case 0xd15:     /* TORC */
         if ((insn & 0x000ff00f) != 0x0003f000 || ((insn >> 22) & 3) == 3)
             return 1;
         tmp = iwmmxt_load_creg(ARM_IWMMXT_wCASF);
@@ -2367,7 +2367,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         tcg_temp_free_i32(tmp2);
         tcg_temp_free_i32(tmp);
         break;
-    case 0x103: case 0x503: case 0x903: case 0xd03:	/* TMOVMSK */
+    case 0x103: case 0x503: case 0x903: case 0xd03:     /* TMOVMSK */
         rd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
         if ((insn & 0xf) != 0 || ((insn >> 22) & 3) == 3)
@@ -2387,7 +2387,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         }
         store_reg(s, rd, tmp);
         break;
-    case 0x106: case 0x306: case 0x506: case 0x706:	/* WCMPGT */
+    case 0x106: case 0x306: case 0x506: case 0x706:     /* WCMPGT */
     case 0x906: case 0xb06: case 0xd06: case 0xf06:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2419,7 +2419,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x00e: case 0x20e: case 0x40e: case 0x60e:	/* WUNPCKEL */
+    case 0x00e: case 0x20e: case 0x40e: case 0x60e:     /* WUNPCKEL */
     case 0x80e: case 0xa0e: case 0xc0e: case 0xe0e:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2450,7 +2450,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x00c: case 0x20c: case 0x40c: case 0x60c:	/* WUNPCKEH */
+    case 0x00c: case 0x20c: case 0x40c: case 0x60c:     /* WUNPCKEH */
     case 0x80c: case 0xa0c: case 0xc0c: case 0xe0c:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2481,7 +2481,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x204: case 0x604: case 0xa04: case 0xe04:	/* WSRL */
+    case 0x204: case 0x604: case 0xa04: case 0xe04:     /* WSRL */
     case 0x214: case 0x614: case 0xa14: case 0xe14:
         if (((insn >> 22) & 3) == 0)
             return 1;
@@ -2509,7 +2509,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x004: case 0x404: case 0x804: case 0xc04:	/* WSRA */
+    case 0x004: case 0x404: case 0x804: case 0xc04:     /* WSRA */
     case 0x014: case 0x414: case 0x814: case 0xc14:
         if (((insn >> 22) & 3) == 0)
             return 1;
@@ -2537,7 +2537,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x104: case 0x504: case 0x904: case 0xd04:	/* WSLL */
+    case 0x104: case 0x504: case 0x904: case 0xd04:     /* WSLL */
     case 0x114: case 0x514: case 0x914: case 0xd14:
         if (((insn >> 22) & 3) == 0)
             return 1;
@@ -2565,7 +2565,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x304: case 0x704: case 0xb04: case 0xf04:	/* WROR */
+    case 0x304: case 0x704: case 0xb04: case 0xf04:     /* WROR */
     case 0x314: case 0x714: case 0xb14: case 0xf14:
         if (((insn >> 22) & 3) == 0)
             return 1;
@@ -2601,7 +2601,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x116: case 0x316: case 0x516: case 0x716:	/* WMIN */
+    case 0x116: case 0x316: case 0x516: case 0x716:     /* WMIN */
     case 0x916: case 0xb16: case 0xd16: case 0xf16:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2632,7 +2632,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x016: case 0x216: case 0x416: case 0x616:	/* WMAX */
+    case 0x016: case 0x216: case 0x416: case 0x616:     /* WMAX */
     case 0x816: case 0xa16: case 0xc16: case 0xe16:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2663,7 +2663,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x002: case 0x102: case 0x202: case 0x302:	/* WALIGNI */
+    case 0x002: case 0x102: case 0x202: case 0x302:     /* WALIGNI */
     case 0x402: case 0x502: case 0x602: case 0x702:
         wrd = (insn >> 12) & 0xf;
         rd0 = (insn >> 16) & 0xf;
@@ -2676,7 +2676,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_movq_wRn_M0(wrd);
         gen_op_iwmmxt_set_mup();
         break;
-    case 0x01a: case 0x11a: case 0x21a: case 0x31a:	/* WSUB */
+    case 0x01a: case 0x11a: case 0x21a: case 0x31a:     /* WSUB */
     case 0x41a: case 0x51a: case 0x61a: case 0x71a:
     case 0x81a: case 0x91a: case 0xa1a: case 0xb1a:
     case 0xc1a: case 0xd1a: case 0xe1a: case 0xf1a:
@@ -2719,7 +2719,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x01e: case 0x11e: case 0x21e: case 0x31e:	/* WSHUFH */
+    case 0x01e: case 0x11e: case 0x21e: case 0x31e:     /* WSHUFH */
     case 0x41e: case 0x51e: case 0x61e: case 0x71e:
     case 0x81e: case 0x91e: case 0xa1e: case 0xb1e:
     case 0xc1e: case 0xd1e: case 0xe1e: case 0xf1e:
@@ -2733,7 +2733,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x018: case 0x118: case 0x218: case 0x318:	/* WADD */
+    case 0x018: case 0x118: case 0x218: case 0x318:     /* WADD */
     case 0x418: case 0x518: case 0x618: case 0x718:
     case 0x818: case 0x918: case 0xa18: case 0xb18:
     case 0xc18: case 0xd18: case 0xe18: case 0xf18:
@@ -2776,7 +2776,7 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         gen_op_iwmmxt_set_mup();
         gen_op_iwmmxt_set_cup();
         break;
-    case 0x008: case 0x108: case 0x208: case 0x308:	/* WPACK */
+    case 0x008: case 0x108: case 0x208: case 0x308:     /* WPACK */
     case 0x408: case 0x508: case 0x608: case 0x708:
     case 0x808: case 0x908: case 0xa08: case 0xb08:
     case 0xc08: case 0xd08: case 0xe08: case 0xf08:
@@ -2823,13 +2823,13 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
         tmp = load_reg(s, rd0);
         tmp2 = load_reg(s, rd1);
         switch ((insn >> 16) & 0xf) {
-        case 0x0:					/* TMIA */
+        case 0x0:                                       /* TMIA */
             gen_helper_iwmmxt_muladdsl(cpu_M0, cpu_M0, tmp, tmp2);
             break;
-        case 0x8:					/* TMIAPH */
+        case 0x8:                                       /* TMIAPH */
             gen_helper_iwmmxt_muladdsw(cpu_M0, cpu_M0, tmp, tmp2);
             break;
-        case 0xc: case 0xd: case 0xe: case 0xf:		/* TMIAxy */
+        case 0xc: case 0xd: case 0xe: case 0xf:                 /* TMIAxy */
             if (insn & (1 << 16))
                 tcg_gen_shri_i32(tmp, tmp, 16);
             if (insn & (1 << 17))
@@ -2872,16 +2872,16 @@ static int disas_dsp_insn(DisasContext *s, uint32_t insn)
         tmp = load_reg(s, rd0);
         tmp2 = load_reg(s, rd1);
         switch ((insn >> 16) & 0xf) {
-        case 0x0:					/* MIA */
+        case 0x0:                                       /* MIA */
             gen_helper_iwmmxt_muladdsl(cpu_M0, cpu_M0, tmp, tmp2);
             break;
-        case 0x8:					/* MIAPH */
+        case 0x8:                                       /* MIAPH */
             gen_helper_iwmmxt_muladdsw(cpu_M0, cpu_M0, tmp, tmp2);
             break;
-        case 0xc:					/* MIABB */
-        case 0xd:					/* MIABT */
-        case 0xe:					/* MIATB */
-        case 0xf:					/* MIATT */
+        case 0xc:                                       /* MIABB */
+        case 0xd:                                       /* MIABT */
+        case 0xe:                                       /* MIATB */
+        case 0xf:                                       /* MIATT */
             if (insn & (1 << 16))
                 tcg_gen_shri_i32(tmp, tmp, 16);
             if (insn & (1 << 17))
@@ -2907,13 +2907,13 @@ static int disas_dsp_insn(DisasContext *s, uint32_t insn)
         if (acc != 0)
             return 1;
 
-        if (insn & ARM_CP_RW_BIT) {			/* MRA */
+        if (insn & ARM_CP_RW_BIT) {                     /* MRA */
             iwmmxt_load_reg(cpu_V0, acc);
             tcg_gen_extrl_i64_i32(cpu_R[rdlo], cpu_V0);
             tcg_gen_shri_i64(cpu_V0, cpu_V0, 32);
             tcg_gen_extrl_i64_i32(cpu_R[rdhi], cpu_V0);
             tcg_gen_andi_i32(cpu_R[rdhi], cpu_R[rdhi], (1 << (40 - 32)) - 1);
-        } else {					/* MAR */
+        } else {                                        /* MAR */
             tcg_gen_concat_i32_i64(cpu_V0, cpu_R[rdlo], cpu_R[rdhi]);
             iwmmxt_store_reg(cpu_V0, acc);
         }

From 67aed15551f9814712d5ac25a155919b34fbd627 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:48 +0100
Subject: [PATCH 42/52] target/arm: Untabify iwmmxt_helper.c

Untabify the arm iwmmxt_helper.c.  This affects only the iwMMXt code.
We've never touched that code in years, so it's not going to get
fixed up by our "change when touched" process, and a bulk change is
not going to be too disruptive.

This commit was produced using Emacs "untabify" (plus one
by-hand removal of a space to fix a checkpatch nit); it is
a whitespace-only change.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180821165215.29069-3-peter.maydell@linaro.org
---
 target/arm/iwmmxt_helper.c | 234 ++++++++++++++++++-------------------
 1 file changed, 117 insertions(+), 117 deletions(-)

diff --git a/target/arm/iwmmxt_helper.c b/target/arm/iwmmxt_helper.c
index f6a4fc5b7f..24244d012c 100644
--- a/target/arm/iwmmxt_helper.c
+++ b/target/arm/iwmmxt_helper.c
@@ -27,30 +27,30 @@
 /* iwMMXt macros extracted from GNU gdb.  */
 
 /* Set the SIMD wCASF flags for 8, 16, 32 or 64-bit operations.  */
-#define SIMD8_SET( v, n, b)	((v != 0) << ((((b) + 1) * 4) + (n)))
-#define SIMD16_SET(v, n, h)	((v != 0) << ((((h) + 1) * 8) + (n)))
-#define SIMD32_SET(v, n, w)	((v != 0) << ((((w) + 1) * 16) + (n)))
-#define SIMD64_SET(v, n)	((v != 0) << (32 + (n)))
+#define SIMD8_SET(v, n, b)      ((v != 0) << ((((b) + 1) * 4) + (n)))
+#define SIMD16_SET(v, n, h)     ((v != 0) << ((((h) + 1) * 8) + (n)))
+#define SIMD32_SET(v, n, w)     ((v != 0) << ((((w) + 1) * 16) + (n)))
+#define SIMD64_SET(v, n)        ((v != 0) << (32 + (n)))
 /* Flags to pass as "n" above.  */
-#define SIMD_NBIT	-1
-#define SIMD_ZBIT	-2
-#define SIMD_CBIT	-3
-#define SIMD_VBIT	-4
+#define SIMD_NBIT       -1
+#define SIMD_ZBIT       -2
+#define SIMD_CBIT       -3
+#define SIMD_VBIT       -4
 /* Various status bit macros.  */
-#define NBIT8(x)	((x) & 0x80)
-#define NBIT16(x)	((x) & 0x8000)
-#define NBIT32(x)	((x) & 0x80000000)
-#define NBIT64(x)	((x) & 0x8000000000000000ULL)
-#define ZBIT8(x)	(((x) & 0xff) == 0)
-#define ZBIT16(x)	(((x) & 0xffff) == 0)
-#define ZBIT32(x)	(((x) & 0xffffffff) == 0)
-#define ZBIT64(x)	(x == 0)
+#define NBIT8(x)        ((x) & 0x80)
+#define NBIT16(x)       ((x) & 0x8000)
+#define NBIT32(x)       ((x) & 0x80000000)
+#define NBIT64(x)       ((x) & 0x8000000000000000ULL)
+#define ZBIT8(x)        (((x) & 0xff) == 0)
+#define ZBIT16(x)       (((x) & 0xffff) == 0)
+#define ZBIT32(x)       (((x) & 0xffffffff) == 0)
+#define ZBIT64(x)       (x == 0)
 /* Sign extension macros.  */
-#define EXTEND8H(a)	((uint16_t) (int8_t) (a))
-#define EXTEND8(a)	((uint32_t) (int8_t) (a))
-#define EXTEND16(a)	((uint32_t) (int16_t) (a))
-#define EXTEND16S(a)	((int32_t) (int16_t) (a))
-#define EXTEND32(a)	((uint64_t) (int32_t) (a))
+#define EXTEND8H(a)     ((uint16_t) (int8_t) (a))
+#define EXTEND8(a)      ((uint32_t) (int8_t) (a))
+#define EXTEND16(a)     ((uint32_t) (int16_t) (a))
+#define EXTEND16S(a)    ((int32_t) (int16_t) (a))
+#define EXTEND32(a)     ((uint64_t) (int32_t) (a))
 
 uint64_t HELPER(iwmmxt_maddsq)(uint64_t a, uint64_t b)
 {
@@ -159,141 +159,141 @@ uint64_t HELPER(iwmmxt_macuw)(uint64_t a, uint64_t b)
 #define NZBIT64(x) \
     SIMD64_SET(NBIT64(x), SIMD_NBIT) | \
     SIMD64_SET(ZBIT64(x), SIMD_ZBIT)
-#define IWMMXT_OP_UNPACK(S, SH0, SH1, SH2, SH3)			\
+#define IWMMXT_OP_UNPACK(S, SH0, SH1, SH2, SH3)                         \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, b)))(CPUARMState *env, \
                                                  uint64_t a, uint64_t b) \
-{								\
-    a =							        \
-        (((a >> SH0) & 0xff) << 0) | (((b >> SH0) & 0xff) << 8) |	\
-        (((a >> SH1) & 0xff) << 16) | (((b >> SH1) & 0xff) << 24) |	\
-        (((a >> SH2) & 0xff) << 32) | (((b >> SH2) & 0xff) << 40) |	\
-        (((a >> SH3) & 0xff) << 48) | (((b >> SH3) & 0xff) << 56);	\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT8(a >> 0, 0) | NZBIT8(a >> 8, 1) |		        \
-        NZBIT8(a >> 16, 2) | NZBIT8(a >> 24, 3) |		\
-        NZBIT8(a >> 32, 4) | NZBIT8(a >> 40, 5) |		\
-        NZBIT8(a >> 48, 6) | NZBIT8(a >> 56, 7);		\
+{                                                               \
+    a =                                                                 \
+        (((a >> SH0) & 0xff) << 0) | (((b >> SH0) & 0xff) << 8) |       \
+        (((a >> SH1) & 0xff) << 16) | (((b >> SH1) & 0xff) << 24) |     \
+        (((a >> SH2) & 0xff) << 32) | (((b >> SH2) & 0xff) << 40) |     \
+        (((a >> SH3) & 0xff) << 48) | (((b >> SH3) & 0xff) << 56);      \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT8(a >> 0, 0) | NZBIT8(a >> 8, 1) |                         \
+        NZBIT8(a >> 16, 2) | NZBIT8(a >> 24, 3) |               \
+        NZBIT8(a >> 32, 4) | NZBIT8(a >> 40, 5) |               \
+        NZBIT8(a >> 48, 6) | NZBIT8(a >> 56, 7);                \
     return a;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, w)))(CPUARMState *env, \
                                         uint64_t a, uint64_t b) \
-{								\
-    a =							        \
-        (((a >> SH0) & 0xffff) << 0) |				\
-        (((b >> SH0) & 0xffff) << 16) |			        \
-        (((a >> SH2) & 0xffff) << 32) |			        \
-        (((b >> SH2) & 0xffff) << 48);				\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT8(a >> 0, 0) | NZBIT8(a >> 16, 1) |		\
-        NZBIT8(a >> 32, 2) | NZBIT8(a >> 48, 3);		\
+{                                                               \
+    a =                                                                 \
+        (((a >> SH0) & 0xffff) << 0) |                          \
+        (((b >> SH0) & 0xffff) << 16) |                                 \
+        (((a >> SH2) & 0xffff) << 32) |                                 \
+        (((b >> SH2) & 0xffff) << 48);                          \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT8(a >> 0, 0) | NZBIT8(a >> 16, 1) |                \
+        NZBIT8(a >> 32, 2) | NZBIT8(a >> 48, 3);                \
     return a;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, l)))(CPUARMState *env, \
                                         uint64_t a, uint64_t b) \
-{								\
-    a =							        \
-        (((a >> SH0) & 0xffffffff) << 0) |			\
-        (((b >> SH0) & 0xffffffff) << 32);			\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT32(a >> 0, 0) | NZBIT32(a >> 32, 1);		\
+{                                                               \
+    a =                                                                 \
+        (((a >> SH0) & 0xffffffff) << 0) |                      \
+        (((b >> SH0) & 0xffffffff) << 32);                      \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT32(a >> 0, 0) | NZBIT32(a >> 32, 1);               \
     return a;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, ub)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x =							        \
-        (((x >> SH0) & 0xff) << 0) |				\
-        (((x >> SH1) & 0xff) << 16) |				\
-        (((x >> SH2) & 0xff) << 32) |				\
-        (((x >> SH3) & 0xff) << 48);				\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT16(x >> 0, 0) | NZBIT16(x >> 16, 1) |		\
-        NZBIT16(x >> 32, 2) | NZBIT16(x >> 48, 3);		\
+{                                                               \
+    x =                                                                 \
+        (((x >> SH0) & 0xff) << 0) |                            \
+        (((x >> SH1) & 0xff) << 16) |                           \
+        (((x >> SH2) & 0xff) << 32) |                           \
+        (((x >> SH3) & 0xff) << 48);                            \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT16(x >> 0, 0) | NZBIT16(x >> 16, 1) |              \
+        NZBIT16(x >> 32, 2) | NZBIT16(x >> 48, 3);              \
     return x;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, uw)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x =							        \
-        (((x >> SH0) & 0xffff) << 0) |				\
-        (((x >> SH2) & 0xffff) << 32);				\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT32(x >> 0, 0) | NZBIT32(x >> 32, 1);		\
+{                                                               \
+    x =                                                                 \
+        (((x >> SH0) & 0xffff) << 0) |                          \
+        (((x >> SH2) & 0xffff) << 32);                          \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT32(x >> 0, 0) | NZBIT32(x >> 32, 1);               \
     return x;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, ul)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x = (((x >> SH0) & 0xffffffff) << 0);			\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] = NZBIT64(x >> 0);	\
+{                                                               \
+    x = (((x >> SH0) & 0xffffffff) << 0);                       \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] = NZBIT64(x >> 0);      \
     return x;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, sb)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x =							        \
-        ((uint64_t) EXTEND8H((x >> SH0) & 0xff) << 0) |	        \
-        ((uint64_t) EXTEND8H((x >> SH1) & 0xff) << 16) |	\
-        ((uint64_t) EXTEND8H((x >> SH2) & 0xff) << 32) |	\
-        ((uint64_t) EXTEND8H((x >> SH3) & 0xff) << 48);	        \
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT16(x >> 0, 0) | NZBIT16(x >> 16, 1) |		\
-        NZBIT16(x >> 32, 2) | NZBIT16(x >> 48, 3);		\
+{                                                               \
+    x =                                                                 \
+        ((uint64_t) EXTEND8H((x >> SH0) & 0xff) << 0) |                 \
+        ((uint64_t) EXTEND8H((x >> SH1) & 0xff) << 16) |        \
+        ((uint64_t) EXTEND8H((x >> SH2) & 0xff) << 32) |        \
+        ((uint64_t) EXTEND8H((x >> SH3) & 0xff) << 48);                 \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT16(x >> 0, 0) | NZBIT16(x >> 16, 1) |              \
+        NZBIT16(x >> 32, 2) | NZBIT16(x >> 48, 3);              \
     return x;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, sw)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x =							        \
-        ((uint64_t) EXTEND16((x >> SH0) & 0xffff) << 0) |	\
-        ((uint64_t) EXTEND16((x >> SH2) & 0xffff) << 32);	\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT32(x >> 0, 0) | NZBIT32(x >> 32, 1);		\
+{                                                               \
+    x =                                                                 \
+        ((uint64_t) EXTEND16((x >> SH0) & 0xffff) << 0) |       \
+        ((uint64_t) EXTEND16((x >> SH2) & 0xffff) << 32);       \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT32(x >> 0, 0) | NZBIT32(x >> 32, 1);               \
     return x;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_unpack, glue(S, sl)))(CPUARMState *env, \
                                                   uint64_t x)   \
-{								\
-    x = EXTEND32((x >> SH0) & 0xffffffff);			\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] = NZBIT64(x >> 0);	\
+{                                                               \
+    x = EXTEND32((x >> SH0) & 0xffffffff);                      \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] = NZBIT64(x >> 0);      \
     return x;                                                   \
 }
 IWMMXT_OP_UNPACK(l, 0, 8, 16, 24)
 IWMMXT_OP_UNPACK(h, 32, 40, 48, 56)
 
-#define IWMMXT_OP_CMP(SUFF, Tb, Tw, Tl, O)			\
+#define IWMMXT_OP_CMP(SUFF, Tb, Tw, Tl, O)                      \
 uint64_t HELPER(glue(iwmmxt_, glue(SUFF, b)))(CPUARMState *env,    \
                                         uint64_t a, uint64_t b) \
-{								\
-    a =							        \
-        CMP(0, Tb, O, 0xff) | CMP(8, Tb, O, 0xff) |		\
-        CMP(16, Tb, O, 0xff) | CMP(24, Tb, O, 0xff) |		\
-        CMP(32, Tb, O, 0xff) | CMP(40, Tb, O, 0xff) |		\
-        CMP(48, Tb, O, 0xff) | CMP(56, Tb, O, 0xff);		\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT8(a >> 0, 0) | NZBIT8(a >> 8, 1) |		        \
-        NZBIT8(a >> 16, 2) | NZBIT8(a >> 24, 3) |		\
-        NZBIT8(a >> 32, 4) | NZBIT8(a >> 40, 5) |		\
-        NZBIT8(a >> 48, 6) | NZBIT8(a >> 56, 7);		\
+{                                                               \
+    a =                                                                 \
+        CMP(0, Tb, O, 0xff) | CMP(8, Tb, O, 0xff) |             \
+        CMP(16, Tb, O, 0xff) | CMP(24, Tb, O, 0xff) |           \
+        CMP(32, Tb, O, 0xff) | CMP(40, Tb, O, 0xff) |           \
+        CMP(48, Tb, O, 0xff) | CMP(56, Tb, O, 0xff);            \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT8(a >> 0, 0) | NZBIT8(a >> 8, 1) |                         \
+        NZBIT8(a >> 16, 2) | NZBIT8(a >> 24, 3) |               \
+        NZBIT8(a >> 32, 4) | NZBIT8(a >> 40, 5) |               \
+        NZBIT8(a >> 48, 6) | NZBIT8(a >> 56, 7);                \
     return a;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_, glue(SUFF, w)))(CPUARMState *env,    \
                                         uint64_t a, uint64_t b) \
-{								\
-    a = CMP(0, Tw, O, 0xffff) | CMP(16, Tw, O, 0xffff) |	\
-        CMP(32, Tw, O, 0xffff) | CMP(48, Tw, O, 0xffff);	\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT16(a >> 0, 0) | NZBIT16(a >> 16, 1) |		\
-        NZBIT16(a >> 32, 2) | NZBIT16(a >> 48, 3);		\
+{                                                               \
+    a = CMP(0, Tw, O, 0xffff) | CMP(16, Tw, O, 0xffff) |        \
+        CMP(32, Tw, O, 0xffff) | CMP(48, Tw, O, 0xffff);        \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT16(a >> 0, 0) | NZBIT16(a >> 16, 1) |              \
+        NZBIT16(a >> 32, 2) | NZBIT16(a >> 48, 3);              \
     return a;                                                   \
-}								\
+}                                                               \
 uint64_t HELPER(glue(iwmmxt_, glue(SUFF, l)))(CPUARMState *env,    \
                                         uint64_t a, uint64_t b) \
-{								\
-    a = CMP(0, Tl, O, 0xffffffff) |				\
-        CMP(32, Tl, O, 0xffffffff);				\
-    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =			\
-        NZBIT32(a >> 0, 0) | NZBIT32(a >> 32, 1);		\
+{                                                               \
+    a = CMP(0, Tl, O, 0xffffffff) |                             \
+        CMP(32, Tl, O, 0xffffffff);                             \
+    env->iwmmxt.cregs[ARM_IWMMXT_wCASF] =                       \
+        NZBIT32(a >> 0, 0) | NZBIT32(a >> 32, 1);               \
     return a;                                                   \
 }
 #define CMP(SHR, TYPE, OPER, MASK) ((((TYPE) ((a >> SHR) & MASK) OPER \

From 6e0fafe2ef02378c696e7cf84ef41511e3b3b81a Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:48 +0100
Subject: [PATCH 43/52] target/arm: Remove a handful of stray tabs

Following the bulk conversion of the iwMMXt code, there are
just a handful of hard coded tabs in target/arm; fix them.
This is a whitespace-only patch.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20180821165215.29069-4-peter.maydell@linaro.org
---
 target/arm/arm-semi.c |  2 +-
 target/arm/cpu.h      | 16 ++++++++--------
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/target/arm/arm-semi.c b/target/arm/arm-semi.c
index 7cac8734c7..b2b22d231e 100644
--- a/target/arm/arm-semi.c
+++ b/target/arm/arm-semi.c
@@ -136,7 +136,7 @@ static void arm_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
 #ifdef CONFIG_USER_ONLY
         ts->swi_errno = err;
 #else
-	syscall_err = err;
+        syscall_err = err;
 #endif
         reg0 = ret;
     } else {
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 62c36b4150..65c0fa0a65 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1320,14 +1320,14 @@ enum arm_cpu_mode {
 #define ARM_VFP_FPINST2 10
 
 /* iwMMXt coprocessor control registers.  */
-#define ARM_IWMMXT_wCID		0
-#define ARM_IWMMXT_wCon		1
-#define ARM_IWMMXT_wCSSF	2
-#define ARM_IWMMXT_wCASF	3
-#define ARM_IWMMXT_wCGR0	8
-#define ARM_IWMMXT_wCGR1	9
-#define ARM_IWMMXT_wCGR2	10
-#define ARM_IWMMXT_wCGR3	11
+#define ARM_IWMMXT_wCID  0
+#define ARM_IWMMXT_wCon  1
+#define ARM_IWMMXT_wCSSF 2
+#define ARM_IWMMXT_wCASF 3
+#define ARM_IWMMXT_wCGR0 8
+#define ARM_IWMMXT_wCGR1 9
+#define ARM_IWMMXT_wCGR2 10
+#define ARM_IWMMXT_wCGR3 11
 
 /* V7M CCR bits */
 FIELD(V7M_CCR, NONBASETHRDENA, 0, 1)

From a02755ece0c0652480ed9d9f2f0355fdc3632fdb Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:48 +0100
Subject: [PATCH 44/52] hw/misc/bcm2835_fb: Move config fields to their own
 struct

The handling of framebuffer properties in the bcm2835_property code
is a bit clumsy, because for each of the many fb related properties
we try to track the value we're about to set and whether we're going
to be setting a value, and then we hand all the new values off
to the framebuffer via a function which takes them all as separate
arguments. It would be simpler if the property code could easily
copy all the framebuffer's current settings, update them with
the new specified values and then ask the framebuffer to switch
to the new set.

As the first part of this refactoring, pull all the fb config
settings fields in BCM2835FBState out into their own struct.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-2-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 114 +++++++++++++++++---------------
 hw/misc/bcm2835_property.c      |  28 ++++----
 include/hw/display/bcm2835_fb.h |  26 ++++++--
 3 files changed, 94 insertions(+), 74 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 3355f4c131..0ffad49ab8 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -52,7 +52,7 @@ static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
     int bpp = surface_bits_per_pixel(surface);
 
     while (width--) {
-        switch (s->bpp) {
+        switch (s->config.bpp) {
         case 8:
             /* lookup palette starting at video ram base
              * TODO: cache translation, rather than doing this each time!
@@ -91,7 +91,7 @@ static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
             break;
         }
 
-        if (s->pixo == 0) {
+        if (s->config.pixo == 0) {
             /* swap to BGR pixel format */
             uint8_t tmp = r;
             r = b;
@@ -135,12 +135,12 @@ static void fb_update_display(void *opaque)
     int src_width = 0;
     int dest_width = 0;
 
-    if (s->lock || !s->xres) {
+    if (s->lock || !s->config.xres) {
         return;
     }
 
-    src_width = s->xres * (s->bpp >> 3);
-    dest_width = s->xres;
+    src_width = s->config.xres * (s->config.bpp >> 3);
+    dest_width = s->config.xres;
 
     switch (surface_bits_per_pixel(surface)) {
     case 0:
@@ -165,16 +165,18 @@ static void fb_update_display(void *opaque)
     }
 
     if (s->invalidate) {
-        framebuffer_update_memory_section(&s->fbsection, s->dma_mr, s->base,
-                                          s->yres, src_width);
+        framebuffer_update_memory_section(&s->fbsection, s->dma_mr,
+                                          s->config.base,
+                                          s->config.yres, src_width);
     }
 
-    framebuffer_update_display(surface, &s->fbsection, s->xres, s->yres,
+    framebuffer_update_display(surface, &s->fbsection,
+                               s->config.xres, s->config.yres,
                                src_width, dest_width, 0, s->invalidate,
                                draw_line_src16, s, &first, &last);
 
     if (first >= 0) {
-        dpy_gfx_update(s->con, 0, first, s->xres, last - first + 1);
+        dpy_gfx_update(s->con, 0, first, s->config.xres, last - first + 1);
     }
 
     s->invalidate = false;
@@ -186,28 +188,28 @@ static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
 
     s->lock = true;
 
-    s->xres = ldl_le_phys(&s->dma_as, value);
-    s->yres = ldl_le_phys(&s->dma_as, value + 4);
-    s->xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
-    s->yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
-    s->bpp = ldl_le_phys(&s->dma_as, value + 20);
-    s->xoffset = ldl_le_phys(&s->dma_as, value + 24);
-    s->yoffset = ldl_le_phys(&s->dma_as, value + 28);
+    s->config.xres = ldl_le_phys(&s->dma_as, value);
+    s->config.yres = ldl_le_phys(&s->dma_as, value + 4);
+    s->config.xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
+    s->config.yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
+    s->config.bpp = ldl_le_phys(&s->dma_as, value + 20);
+    s->config.xoffset = ldl_le_phys(&s->dma_as, value + 24);
+    s->config.yoffset = ldl_le_phys(&s->dma_as, value + 28);
 
-    s->base = s->vcram_base | (value & 0xc0000000);
-    s->base += BCM2835_FB_OFFSET;
+    s->config.base = s->vcram_base | (value & 0xc0000000);
+    s->config.base += BCM2835_FB_OFFSET;
 
     /* TODO - Manage properly virtual resolution */
 
-    s->pitch = s->xres * (s->bpp >> 3);
-    s->size = s->yres * s->pitch;
+    s->pitch = s->config.xres * (s->config.bpp >> 3);
+    s->size = s->config.yres * s->pitch;
 
     stl_le_phys(&s->dma_as, value + 16, s->pitch);
-    stl_le_phys(&s->dma_as, value + 32, s->base);
+    stl_le_phys(&s->dma_as, value + 32, s->config.base);
     stl_le_phys(&s->dma_as, value + 36, s->size);
 
     s->invalidate = true;
-    qemu_console_resize(s->con, s->xres, s->yres);
+    qemu_console_resize(s->con, s->config.xres, s->config.yres);
     s->lock = false;
 }
 
@@ -219,34 +221,34 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,
 
     /* TODO: input validation! */
     if (xres) {
-        s->xres = *xres;
+        s->config.xres = *xres;
     }
     if (yres) {
-        s->yres = *yres;
+        s->config.yres = *yres;
     }
     if (xoffset) {
-        s->xoffset = *xoffset;
+        s->config.xoffset = *xoffset;
     }
     if (yoffset) {
-        s->yoffset = *yoffset;
+        s->config.yoffset = *yoffset;
     }
     if (bpp) {
-        s->bpp = *bpp;
+        s->config.bpp = *bpp;
     }
     if (pixo) {
-        s->pixo = *pixo;
+        s->config.pixo = *pixo;
     }
     if (alpha) {
-        s->alpha = *alpha;
+        s->config.alpha = *alpha;
     }
 
     /* TODO - Manage properly virtual resolution */
 
-    s->pitch = s->xres * (s->bpp >> 3);
-    s->size = s->yres * s->pitch;
+    s->pitch = s->config.xres * (s->config.bpp >> 3);
+    s->size = s->config.yres * s->pitch;
 
     s->invalidate = true;
-    qemu_console_resize(s->con, s->xres, s->yres);
+    qemu_console_resize(s->con, s->config.xres, s->config.yres);
     s->lock = false;
 }
 
@@ -312,18 +314,18 @@ static const VMStateDescription vmstate_bcm2835_fb = {
         VMSTATE_BOOL(lock, BCM2835FBState),
         VMSTATE_BOOL(invalidate, BCM2835FBState),
         VMSTATE_BOOL(pending, BCM2835FBState),
-        VMSTATE_UINT32(xres, BCM2835FBState),
-        VMSTATE_UINT32(yres, BCM2835FBState),
-        VMSTATE_UINT32(xres_virtual, BCM2835FBState),
-        VMSTATE_UINT32(yres_virtual, BCM2835FBState),
-        VMSTATE_UINT32(xoffset, BCM2835FBState),
-        VMSTATE_UINT32(yoffset, BCM2835FBState),
-        VMSTATE_UINT32(bpp, BCM2835FBState),
-        VMSTATE_UINT32(base, BCM2835FBState),
+        VMSTATE_UINT32(config.xres, BCM2835FBState),
+        VMSTATE_UINT32(config.yres, BCM2835FBState),
+        VMSTATE_UINT32(config.xres_virtual, BCM2835FBState),
+        VMSTATE_UINT32(config.yres_virtual, BCM2835FBState),
+        VMSTATE_UINT32(config.xoffset, BCM2835FBState),
+        VMSTATE_UINT32(config.yoffset, BCM2835FBState),
+        VMSTATE_UINT32(config.bpp, BCM2835FBState),
+        VMSTATE_UINT32(config.base, BCM2835FBState),
         VMSTATE_UINT32(pitch, BCM2835FBState),
         VMSTATE_UINT32(size, BCM2835FBState),
-        VMSTATE_UINT32(pixo, BCM2835FBState),
-        VMSTATE_UINT32(alpha, BCM2835FBState),
+        VMSTATE_UINT32(config.pixo, BCM2835FBState),
+        VMSTATE_UINT32(config.alpha, BCM2835FBState),
         VMSTATE_END_OF_LIST()
     }
 };
@@ -349,13 +351,13 @@ static void bcm2835_fb_reset(DeviceState *dev)
 
     s->pending = false;
 
-    s->xres_virtual = s->xres;
-    s->yres_virtual = s->yres;
-    s->xoffset = 0;
-    s->yoffset = 0;
-    s->base = s->vcram_base + BCM2835_FB_OFFSET;
-    s->pitch = s->xres * (s->bpp >> 3);
-    s->size = s->yres * s->pitch;
+    s->config.xres_virtual = s->config.xres;
+    s->config.yres_virtual = s->config.yres;
+    s->config.xoffset = 0;
+    s->config.yoffset = 0;
+    s->config.base = s->vcram_base + BCM2835_FB_OFFSET;
+    s->pitch = s->config.xres * (s->config.bpp >> 3);
+    s->size = s->config.yres * s->pitch;
 
     s->invalidate = true;
     s->lock = false;
@@ -385,18 +387,20 @@ static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
     bcm2835_fb_reset(dev);
 
     s->con = graphic_console_init(dev, 0, &vgafb_ops, s);
-    qemu_console_resize(s->con, s->xres, s->yres);
+    qemu_console_resize(s->con, s->config.xres, s->config.yres);
 }
 
 static Property bcm2835_fb_props[] = {
     DEFINE_PROP_UINT32("vcram-base", BCM2835FBState, vcram_base, 0),/*required*/
     DEFINE_PROP_UINT32("vcram-size", BCM2835FBState, vcram_size,
                        DEFAULT_VCRAM_SIZE),
-    DEFINE_PROP_UINT32("xres", BCM2835FBState, xres, 640),
-    DEFINE_PROP_UINT32("yres", BCM2835FBState, yres, 480),
-    DEFINE_PROP_UINT32("bpp", BCM2835FBState, bpp, 16),
-    DEFINE_PROP_UINT32("pixo", BCM2835FBState, pixo, 1), /* 1=RGB, 0=BGR */
-    DEFINE_PROP_UINT32("alpha", BCM2835FBState, alpha, 2), /* alpha ignored */
+    DEFINE_PROP_UINT32("xres", BCM2835FBState, config.xres, 640),
+    DEFINE_PROP_UINT32("yres", BCM2835FBState, config.yres, 480),
+    DEFINE_PROP_UINT32("bpp", BCM2835FBState, config.bpp, 16),
+    DEFINE_PROP_UINT32("pixo",
+                       BCM2835FBState, config.pixo, 1), /* 1=RGB, 0=BGR */
+    DEFINE_PROP_UINT32("alpha",
+                       BCM2835FBState, config.alpha, 2), /* alpha ignored */
     DEFINE_PROP_END_OF_LIST()
 };
 
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index 70eaafd325..c79f358702 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -141,10 +141,10 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         /* Frame buffer */
 
         case 0x00040001: /* Allocate buffer */
-            stl_le_phys(&s->dma_as, value + 12, s->fbdev->base);
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
-            tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
+            stl_le_phys(&s->dma_as, value + 12, s->fbdev->config.base);
+            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
+            tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.yres;
+            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
             stl_le_phys(&s->dma_as, value + 16,
                         tmp_xres * tmp_yres * tmp_bpp / 8);
             resplen = 8;
@@ -157,8 +157,8 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00040003: /* Get display width/height */
         case 0x00040004:
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
-            tmp_yres = newyres != NULL ? *newyres : s->fbdev->yres;
+            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
+            tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.yres;
             stl_le_phys(&s->dma_as, value + 12, tmp_xres);
             stl_le_phys(&s->dma_as, value + 16, tmp_yres);
             resplen = 8;
@@ -176,7 +176,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             resplen = 8;
             break;
         case 0x00040005: /* Get depth */
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
+            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
             stl_le_phys(&s->dma_as, value + 12, tmp_bpp);
             resplen = 4;
             break;
@@ -189,7 +189,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             resplen = 4;
             break;
         case 0x00040006: /* Get pixel order */
-            tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->pixo;
+            tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->config.pixo;
             stl_le_phys(&s->dma_as, value + 12, tmp_pixo);
             resplen = 4;
             break;
@@ -202,7 +202,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             resplen = 4;
             break;
         case 0x00040007: /* Get alpha */
-            tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->alpha;
+            tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->config.alpha;
             stl_le_phys(&s->dma_as, value + 12, tmp_alpha);
             resplen = 4;
             break;
@@ -215,14 +215,16 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             resplen = 4;
             break;
         case 0x00040008: /* Get pitch */
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->xres;
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->bpp;
+            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
+            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
             stl_le_phys(&s->dma_as, value + 12, tmp_xres * tmp_bpp / 8);
             resplen = 4;
             break;
         case 0x00040009: /* Get virtual offset */
-            tmp_xoffset = newxoffset != NULL ? *newxoffset : s->fbdev->xoffset;
-            tmp_yoffset = newyoffset != NULL ? *newyoffset : s->fbdev->yoffset;
+            tmp_xoffset = newxoffset != NULL ?
+                *newxoffset : s->fbdev->config.xoffset;
+            tmp_yoffset = newyoffset != NULL ?
+                *newyoffset : s->fbdev->config.yoffset;
             stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
             stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
             resplen = 8;
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index ae0a3807f2..8485825ba5 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -17,6 +17,20 @@
 #define TYPE_BCM2835_FB "bcm2835-fb"
 #define BCM2835_FB(obj) OBJECT_CHECK(BCM2835FBState, (obj), TYPE_BCM2835_FB)
 
+/*
+ * Configuration information about the fb which the guest can program
+ * via the mailbox property interface.
+ */
+typedef struct {
+    uint32_t xres, yres;
+    uint32_t xres_virtual, yres_virtual;
+    uint32_t xoffset, yoffset;
+    uint32_t bpp;
+    uint32_t base;
+    uint32_t pixo;
+    uint32_t alpha;
+} BCM2835FBConfig;
+
 typedef struct {
     /*< private >*/
     SysBusDevice busdev;
@@ -31,12 +45,12 @@ typedef struct {
     qemu_irq mbox_irq;
 
     bool lock, invalidate, pending;
-    uint32_t xres, yres;
-    uint32_t xres_virtual, yres_virtual;
-    uint32_t xoffset, yoffset;
-    uint32_t bpp;
-    uint32_t base, pitch, size;
-    uint32_t pixo, alpha;
+
+    BCM2835FBConfig config;
+
+    /* These are just cached values calculated from the config settings */
+    uint32_t size;
+    uint32_t pitch;
 } BCM2835FBState;
 
 void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,

From 193100b571755023690787bcb1ebc91fcc03ed50 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:48 +0100
Subject: [PATCH 45/52] hw/misc/bcm2835_property: Track fb settings using
 BCM2835FBConfig

Refactor the fb property setting code so that rather than
using a set of pointers to local variables to track
whether a config value has been updated in the current
mbox and if so what its new value is, we just copy
all the current settings of the fb at the start, and
then update that copy as we go along, before asking
the fb to switch to it at the end.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-3-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 27 ++---------
 hw/misc/bcm2835_property.c      | 80 ++++++++++++++-------------------
 include/hw/display/bcm2835_fb.h |  4 +-
 3 files changed, 37 insertions(+), 74 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 0ffad49ab8..8155de5d0b 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -213,34 +213,13 @@ static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
     s->lock = false;
 }
 
-void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,
-                            uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp,
-                            uint32_t *pixo, uint32_t *alpha)
+void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
 {
     s->lock = true;
 
     /* TODO: input validation! */
-    if (xres) {
-        s->config.xres = *xres;
-    }
-    if (yres) {
-        s->config.yres = *yres;
-    }
-    if (xoffset) {
-        s->config.xoffset = *xoffset;
-    }
-    if (yoffset) {
-        s->config.yoffset = *yoffset;
-    }
-    if (bpp) {
-        s->config.bpp = *bpp;
-    }
-    if (pixo) {
-        s->config.pixo = *pixo;
-    }
-    if (alpha) {
-        s->config.alpha = *alpha;
-    }
+
+    s->config = *newconfig;
 
     /* TODO - Manage properly virtual resolution */
 
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index c79f358702..df0645d1b8 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -21,11 +21,14 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
     uint32_t tmp;
     int n;
     uint32_t offset, length, color;
-    uint32_t xres, yres, xoffset, yoffset, bpp, pixo, alpha;
-    uint32_t tmp_xres, tmp_yres, tmp_xoffset, tmp_yoffset;
-    uint32_t tmp_bpp, tmp_pixo, tmp_alpha;
-    uint32_t *newxres = NULL, *newyres = NULL, *newxoffset = NULL,
-        *newyoffset = NULL, *newbpp = NULL, *newpixo = NULL, *newalpha = NULL;
+
+    /*
+     * Copy the current state of the framebuffer config; we will update
+     * this copy as we process tags and then ask the framebuffer to use
+     * it at the end.
+     */
+    BCM2835FBConfig fbconfig = s->fbdev->config;
+    bool fbconfig_updated = false;
 
     value &= ~0xf;
 
@@ -141,12 +144,9 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         /* Frame buffer */
 
         case 0x00040001: /* Allocate buffer */
-            stl_le_phys(&s->dma_as, value + 12, s->fbdev->config.base);
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
-            tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.yres;
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
             stl_le_phys(&s->dma_as, value + 16,
-                        tmp_xres * tmp_yres * tmp_bpp / 8);
+                        fbconfig.xres * fbconfig.yres * fbconfig.bpp / 8);
             resplen = 8;
             break;
         case 0x00048001: /* Release buffer */
@@ -157,10 +157,8 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00040003: /* Get display width/height */
         case 0x00040004:
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
-            tmp_yres = newyres != NULL ? *newyres : s->fbdev->config.yres;
-            stl_le_phys(&s->dma_as, value + 12, tmp_xres);
-            stl_le_phys(&s->dma_as, value + 16, tmp_yres);
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
             resplen = 8;
             break;
         case 0x00044003: /* Test display width/height */
@@ -169,74 +167,64 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00048003: /* Set display width/height */
         case 0x00048004:
-            xres = ldl_le_phys(&s->dma_as, value + 12);
-            newxres = &xres;
-            yres = ldl_le_phys(&s->dma_as, value + 16);
-            newyres = &yres;
+            fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
+            fbconfig_updated = true;
             resplen = 8;
             break;
         case 0x00040005: /* Get depth */
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
-            stl_le_phys(&s->dma_as, value + 12, tmp_bpp);
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
             resplen = 4;
             break;
         case 0x00044005: /* Test depth */
             resplen = 4;
             break;
         case 0x00048005: /* Set depth */
-            bpp = ldl_le_phys(&s->dma_as, value + 12);
-            newbpp = &bpp;
+            fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig_updated = true;
             resplen = 4;
             break;
         case 0x00040006: /* Get pixel order */
-            tmp_pixo = newpixo != NULL ? *newpixo : s->fbdev->config.pixo;
-            stl_le_phys(&s->dma_as, value + 12, tmp_pixo);
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
             resplen = 4;
             break;
         case 0x00044006: /* Test pixel order */
             resplen = 4;
             break;
         case 0x00048006: /* Set pixel order */
-            pixo = ldl_le_phys(&s->dma_as, value + 12);
-            newpixo = &pixo;
+            fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig_updated = true;
             resplen = 4;
             break;
         case 0x00040007: /* Get alpha */
-            tmp_alpha = newalpha != NULL ? *newalpha : s->fbdev->config.alpha;
-            stl_le_phys(&s->dma_as, value + 12, tmp_alpha);
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
             resplen = 4;
             break;
         case 0x00044007: /* Test pixel alpha */
             resplen = 4;
             break;
         case 0x00048007: /* Set alpha */
-            alpha = ldl_le_phys(&s->dma_as, value + 12);
-            newalpha = &alpha;
+            fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig_updated = true;
             resplen = 4;
             break;
         case 0x00040008: /* Get pitch */
-            tmp_xres = newxres != NULL ? *newxres : s->fbdev->config.xres;
-            tmp_bpp = newbpp != NULL ? *newbpp : s->fbdev->config.bpp;
-            stl_le_phys(&s->dma_as, value + 12, tmp_xres * tmp_bpp / 8);
+            stl_le_phys(&s->dma_as, value + 12,
+                        fbconfig.xres * fbconfig.bpp / 8);
             resplen = 4;
             break;
         case 0x00040009: /* Get virtual offset */
-            tmp_xoffset = newxoffset != NULL ?
-                *newxoffset : s->fbdev->config.xoffset;
-            tmp_yoffset = newyoffset != NULL ?
-                *newyoffset : s->fbdev->config.yoffset;
-            stl_le_phys(&s->dma_as, value + 12, tmp_xoffset);
-            stl_le_phys(&s->dma_as, value + 16, tmp_yoffset);
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
             resplen = 8;
             break;
         case 0x00044009: /* Test virtual offset */
             resplen = 8;
             break;
         case 0x00048009: /* Set virtual offset */
-            xoffset = ldl_le_phys(&s->dma_as, value + 12);
-            newxoffset = &xoffset;
-            yoffset = ldl_le_phys(&s->dma_as, value + 16);
-            newyoffset = &yoffset;
+            fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
+            fbconfig_updated = true;
             resplen = 8;
             break;
         case 0x0004000a: /* Get/Test/Set overscan */
@@ -287,10 +275,8 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
     }
 
     /* Reconfigure framebuffer if required */
-    if (newxres || newyres || newxoffset || newyoffset || newbpp || newpixo
-        || newalpha) {
-        bcm2835_fb_reconfigure(s->fbdev, newxres, newyres, newxoffset,
-                               newyoffset, newbpp, newpixo, newalpha);
+    if (fbconfig_updated) {
+        bcm2835_fb_reconfigure(s->fbdev, &fbconfig);
     }
 
     /* Buffer response code */
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index 8485825ba5..b965698d28 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -53,8 +53,6 @@ typedef struct {
     uint32_t pitch;
 } BCM2835FBState;
 
-void bcm2835_fb_reconfigure(BCM2835FBState *s, uint32_t *xres, uint32_t *yres,
-                            uint32_t *xoffset, uint32_t *yoffset, uint32_t *bpp,
-                            uint32_t *pixo, uint32_t *alpha);
+void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
 
 #endif

From ea662f7cc8685622f393cdb7f7b7d243797a8af5 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:49 +0100
Subject: [PATCH 46/52] hw/display/bcm2835_fb: Drop unused size and pitch
 fields

The BCM2835FBState struct has a 'pitch' field which is a
cached copy of xres * (bpp >> 3), and a 'size' field which is
a cached copy of pitch * yres. However we don't actually do
anything with these fields; delete them. We retain the
now-unused slots in the VMState struct for migration
compatibility.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-4-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 19 ++++++++-----------
 include/hw/display/bcm2835_fb.h |  4 ----
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 8155de5d0b..9faabf0d0b 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -184,6 +184,9 @@ static void fb_update_display(void *opaque)
 
 static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
 {
+    uint32_t pitch;
+    uint32_t size;
+
     value &= ~0xf;
 
     s->lock = true;
@@ -201,12 +204,12 @@ static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
 
     /* TODO - Manage properly virtual resolution */
 
-    s->pitch = s->config.xres * (s->config.bpp >> 3);
-    s->size = s->config.yres * s->pitch;
+    pitch = s->config.xres * (s->config.bpp >> 3);
+    size = s->config.yres * pitch;
 
-    stl_le_phys(&s->dma_as, value + 16, s->pitch);
+    stl_le_phys(&s->dma_as, value + 16, pitch);
     stl_le_phys(&s->dma_as, value + 32, s->config.base);
-    stl_le_phys(&s->dma_as, value + 36, s->size);
+    stl_le_phys(&s->dma_as, value + 36, size);
 
     s->invalidate = true;
     qemu_console_resize(s->con, s->config.xres, s->config.yres);
@@ -223,9 +226,6 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
 
     /* TODO - Manage properly virtual resolution */
 
-    s->pitch = s->config.xres * (s->config.bpp >> 3);
-    s->size = s->config.yres * s->pitch;
-
     s->invalidate = true;
     qemu_console_resize(s->con, s->config.xres, s->config.yres);
     s->lock = false;
@@ -301,8 +301,7 @@ static const VMStateDescription vmstate_bcm2835_fb = {
         VMSTATE_UINT32(config.yoffset, BCM2835FBState),
         VMSTATE_UINT32(config.bpp, BCM2835FBState),
         VMSTATE_UINT32(config.base, BCM2835FBState),
-        VMSTATE_UINT32(pitch, BCM2835FBState),
-        VMSTATE_UINT32(size, BCM2835FBState),
+        VMSTATE_UNUSED(8), /* Was pitch and size */
         VMSTATE_UINT32(config.pixo, BCM2835FBState),
         VMSTATE_UINT32(config.alpha, BCM2835FBState),
         VMSTATE_END_OF_LIST()
@@ -335,8 +334,6 @@ static void bcm2835_fb_reset(DeviceState *dev)
     s->config.xoffset = 0;
     s->config.yoffset = 0;
     s->config.base = s->vcram_base + BCM2835_FB_OFFSET;
-    s->pitch = s->config.xres * (s->config.bpp >> 3);
-    s->size = s->config.yres * s->pitch;
 
     s->invalidate = true;
     s->lock = false;
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index b965698d28..69cbf2d1fd 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -47,10 +47,6 @@ typedef struct {
     bool lock, invalidate, pending;
 
     BCM2835FBConfig config;
-
-    /* These are just cached values calculated from the config settings */
-    uint32_t size;
-    uint32_t pitch;
 } BCM2835FBState;
 
 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);

From 9e2938a0fdb6d85d79c9d97b1fe4e626925be9b5 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:49 +0100
Subject: [PATCH 47/52] hw/display/bcm2835_fb: Reset resolution, etc correctly

The bcm2835_fb's initial resolution and other parameters are set
via QOM properties. We should reset to those initial values on
device reset, which means we need to save the QOM property
values somewhere that they are not overwritten by guest
changes to the framebuffer configuration.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-5-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 27 +++++++++++++++------------
 include/hw/display/bcm2835_fb.h |  1 +
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 9faabf0d0b..d95686c74c 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -329,11 +329,7 @@ static void bcm2835_fb_reset(DeviceState *dev)
 
     s->pending = false;
 
-    s->config.xres_virtual = s->config.xres;
-    s->config.yres_virtual = s->config.yres;
-    s->config.xoffset = 0;
-    s->config.yoffset = 0;
-    s->config.base = s->vcram_base + BCM2835_FB_OFFSET;
+    s->config = s->initial_config;
 
     s->invalidate = true;
     s->lock = false;
@@ -357,6 +353,13 @@ static void bcm2835_fb_realize(DeviceState *dev, Error **errp)
         return;
     }
 
+    /* Fill in the parts of initial_config that are not set by QOM properties */
+    s->initial_config.xres_virtual = s->initial_config.xres;
+    s->initial_config.yres_virtual = s->initial_config.yres;
+    s->initial_config.xoffset = 0;
+    s->initial_config.yoffset = 0;
+    s->initial_config.base = s->vcram_base + BCM2835_FB_OFFSET;
+
     s->dma_mr = MEMORY_REGION(obj);
     address_space_init(&s->dma_as, s->dma_mr, NULL);
 
@@ -370,13 +373,13 @@ static Property bcm2835_fb_props[] = {
     DEFINE_PROP_UINT32("vcram-base", BCM2835FBState, vcram_base, 0),/*required*/
     DEFINE_PROP_UINT32("vcram-size", BCM2835FBState, vcram_size,
                        DEFAULT_VCRAM_SIZE),
-    DEFINE_PROP_UINT32("xres", BCM2835FBState, config.xres, 640),
-    DEFINE_PROP_UINT32("yres", BCM2835FBState, config.yres, 480),
-    DEFINE_PROP_UINT32("bpp", BCM2835FBState, config.bpp, 16),
-    DEFINE_PROP_UINT32("pixo",
-                       BCM2835FBState, config.pixo, 1), /* 1=RGB, 0=BGR */
-    DEFINE_PROP_UINT32("alpha",
-                       BCM2835FBState, config.alpha, 2), /* alpha ignored */
+    DEFINE_PROP_UINT32("xres", BCM2835FBState, initial_config.xres, 640),
+    DEFINE_PROP_UINT32("yres", BCM2835FBState, initial_config.yres, 480),
+    DEFINE_PROP_UINT32("bpp", BCM2835FBState, initial_config.bpp, 16),
+    DEFINE_PROP_UINT32("pixo", BCM2835FBState,
+                       initial_config.pixo, 1), /* 1=RGB, 0=BGR */
+    DEFINE_PROP_UINT32("alpha", BCM2835FBState,
+                       initial_config.alpha, 2), /* alpha ignored */
     DEFINE_PROP_END_OF_LIST()
 };
 
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index 69cbf2d1fd..374de54612 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -47,6 +47,7 @@ typedef struct {
     bool lock, invalidate, pending;
 
     BCM2835FBConfig config;
+    BCM2835FBConfig initial_config;
 } BCM2835FBState;
 
 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);

From 9a1f03f4ee207d58674fc76aecff546551c9da76 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:49 +0100
Subject: [PATCH 48/52] hw/display/bcm2835_fb: Abstract out calculation of
 pitch, size

Abstract out the calculation of the pitch and size of the
framebuffer into functions that operate on the BCM2835FBConfig
struct -- these are about to get a little more complicated
when we add support for virtual and physical sizes differing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-6-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         |  6 +++---
 hw/misc/bcm2835_property.c      |  4 ++--
 include/hw/display/bcm2835_fb.h | 22 ++++++++++++++++++++++
 3 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index d95686c74c..a6c0a0cc94 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -139,7 +139,7 @@ static void fb_update_display(void *opaque)
         return;
     }
 
-    src_width = s->config.xres * (s->config.bpp >> 3);
+    src_width = bcm2835_fb_get_pitch(&s->config);
     dest_width = s->config.xres;
 
     switch (surface_bits_per_pixel(surface)) {
@@ -204,8 +204,8 @@ static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
 
     /* TODO - Manage properly virtual resolution */
 
-    pitch = s->config.xres * (s->config.bpp >> 3);
-    size = s->config.yres * pitch;
+    pitch = bcm2835_fb_get_pitch(&s->config);
+    size = bcm2835_fb_get_size(&s->config);
 
     stl_le_phys(&s->dma_as, value + 16, pitch);
     stl_le_phys(&s->dma_as, value + 32, s->config.base);
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index df0645d1b8..c8c4979bd2 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -146,7 +146,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         case 0x00040001: /* Allocate buffer */
             stl_le_phys(&s->dma_as, value + 12, fbconfig.base);
             stl_le_phys(&s->dma_as, value + 16,
-                        fbconfig.xres * fbconfig.yres * fbconfig.bpp / 8);
+                        bcm2835_fb_get_size(&fbconfig));
             resplen = 8;
             break;
         case 0x00048001: /* Release buffer */
@@ -210,7 +210,7 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00040008: /* Get pitch */
             stl_le_phys(&s->dma_as, value + 12,
-                        fbconfig.xres * fbconfig.bpp / 8);
+                        bcm2835_fb_get_pitch(&fbconfig));
             resplen = 4;
             break;
         case 0x00040009: /* Get virtual offset */
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index 374de54612..95bcec7fe3 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -52,4 +52,26 @@ typedef struct {
 
 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
 
+/**
+ * bcm2835_fb_get_pitch: return number of bytes per line of the framebuffer
+ * @config: configuration info for the framebuffer
+ *
+ * Return the number of bytes per line of the framebuffer, ie the number
+ * that must be added to a pixel address to get the address of the pixel
+ * directly below it on screen.
+ */
+static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
+{
+    return config->xres * (config->bpp >> 3);
+}
+
+/**
+ * bcm2835_fb_get_size: return total size of framebuffer in bytes
+ * @config: configuration info for the framebuffer
+ */
+static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
+{
+    return config->yres * bcm2835_fb_get_pitch(config);
+}
+
 #endif

From 01f18af98b04dc3f47c37a150ae342fafd7337df Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:49 +0100
Subject: [PATCH 49/52] hw/display/bcm2835_fb: Fix handling of virtual
 framebuffer

The raspi framebuffir in bcm2835_fb supports the definition
of a virtual "viewport", which is smaller than the full
physical framebuffer size and at an adjustable offset within
it. Only the viewport area is sent to the screen. This allows
the guest to do things like double buffering, or scrolling
by adjusting the viewport origin. Currently QEMU doesn't
implement this at all.

Add support for this feature:
 * the property mailbox code needs to distinguish the
   virtual width/height from the physical width/height
 * the framebuffer code needs to do something with the
   virtual width/height/origin information

Note that the wiki documentation on the semantics of the
virtual and physical height and width has it the wrong way
around -- the virtual size is the size of the allocated
buffer, and the physical size is the size of the display,
so the virtual size is always the same as or larger than
the physical.

If the viewport size is set smaller than the physical
screen size, we ignore the viewport settings completely
and just display the physical screen area.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-7-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 28 ++++++++++++++++++++++------
 hw/misc/bcm2835_property.c      | 21 +++++++++++++++------
 include/hw/display/bcm2835_fb.h |  6 ++++--
 3 files changed, 41 insertions(+), 14 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index a6c0a0cc94..76a10072b4 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -126,6 +126,18 @@ static void draw_line_src16(void *opaque, uint8_t *dst, const uint8_t *src,
     }
 }
 
+static bool fb_use_offsets(BCM2835FBConfig *config)
+{
+    /*
+     * Return true if we should use the viewport offsets.
+     * Experimentally, the hardware seems to do this only if the
+     * viewport size is larger than the physical screen. (It doesn't
+     * prevent the guest setting this silly viewport setting, though...)
+     */
+    return config->xres_virtual > config->xres &&
+        config->yres_virtual > config->yres;
+}
+
 static void fb_update_display(void *opaque)
 {
     BCM2835FBState *s = opaque;
@@ -134,12 +146,18 @@ static void fb_update_display(void *opaque)
     int last = 0;
     int src_width = 0;
     int dest_width = 0;
+    uint32_t xoff = 0, yoff = 0;
 
     if (s->lock || !s->config.xres) {
         return;
     }
 
     src_width = bcm2835_fb_get_pitch(&s->config);
+    if (fb_use_offsets(&s->config)) {
+        xoff = s->config.xoffset;
+        yoff = s->config.yoffset;
+    }
+
     dest_width = s->config.xres;
 
     switch (surface_bits_per_pixel(surface)) {
@@ -165,8 +183,9 @@ static void fb_update_display(void *opaque)
     }
 
     if (s->invalidate) {
+        hwaddr base = s->config.base + xoff + yoff * src_width;
         framebuffer_update_memory_section(&s->fbsection, s->dma_mr,
-                                          s->config.base,
+                                          base,
                                           s->config.yres, src_width);
     }
 
@@ -176,7 +195,8 @@ static void fb_update_display(void *opaque)
                                draw_line_src16, s, &first, &last);
 
     if (first >= 0) {
-        dpy_gfx_update(s->con, 0, first, s->config.xres, last - first + 1);
+        dpy_gfx_update(s->con, 0, first, s->config.xres,
+                       last - first + 1);
     }
 
     s->invalidate = false;
@@ -202,8 +222,6 @@ static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
     s->config.base = s->vcram_base | (value & 0xc0000000);
     s->config.base += BCM2835_FB_OFFSET;
 
-    /* TODO - Manage properly virtual resolution */
-
     pitch = bcm2835_fb_get_pitch(&s->config);
     size = bcm2835_fb_get_size(&s->config);
 
@@ -224,8 +242,6 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
 
     s->config = *newconfig;
 
-    /* TODO - Manage properly virtual resolution */
-
     s->invalidate = true;
     qemu_console_resize(s->con, s->config.xres, s->config.yres);
     s->lock = false;
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index c8c4979bd2..e3ab677891 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -155,23 +155,32 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         case 0x00040002: /* Blank screen */
             resplen = 4;
             break;
-        case 0x00040003: /* Get display width/height */
-        case 0x00040004:
+        case 0x00040003: /* Get physical display width/height */
             stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
             stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
             resplen = 8;
             break;
-        case 0x00044003: /* Test display width/height */
-        case 0x00044004:
+        case 0x00040004: /* Get virtual display width/height */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
             resplen = 8;
             break;
-        case 0x00048003: /* Set display width/height */
-        case 0x00048004:
+        case 0x00044003: /* Test physical display width/height */
+        case 0x00044004: /* Test virtual display width/height */
+            resplen = 8;
+            break;
+        case 0x00048003: /* Set physical display width/height */
             fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
             fbconfig_updated = true;
             resplen = 8;
             break;
+        case 0x00048004: /* Set virtual display width/height */
+            fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
+            fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
+            fbconfig_updated = true;
+            resplen = 8;
+            break;
         case 0x00040005: /* Get depth */
             stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
             resplen = 4;
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index 95bcec7fe3..d992c60c12 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -62,7 +62,8 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig);
  */
 static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
 {
-    return config->xres * (config->bpp >> 3);
+    uint32_t xres = MAX(config->xres, config->xres_virtual);
+    return xres * (config->bpp >> 3);
 }
 
 /**
@@ -71,7 +72,8 @@ static inline uint32_t bcm2835_fb_get_pitch(BCM2835FBConfig *config)
  */
 static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
 {
-    return config->yres * bcm2835_fb_get_pitch(config);
+    uint32_t yres = MAX(config->yres, config->yres_virtual);
+    return yres * bcm2835_fb_get_pitch(config);
 }
 
 #endif

From f8add62c0c8826ca0fa90e6e3a80b810f63fe1dd Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:50 +0100
Subject: [PATCH 50/52] hw/display/bcm2835_fb: Validate config settings

Validate the config settings that the guest tries to set.

The wiki page documentation is not really accurate here:
generally rather than failing requests to set bad parameters,
the hardware will just clip them to something sensible.

Validate the most important parameters: sizes and
the viewport offsets. This prevents the framebuffer
code from trying to read out-of-range memory.

In the property handling code, we validate the new parameters every
time we encounter a tag that sets them. This means we validate the
config multiple times if the request includes multiple config-setting
tags, but the code would require significant restructuring to do a
validation only once but still return the clipped settings for
get-parameter tags and the buffer allocation tag.

Validation of settings made via the older bcm2835_fb_mbox_push()
function will be done in the next commit.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-8-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c         | 48 +++++++++++++++++++++++++++--
 hw/misc/bcm2835_property.c      | 54 ++++++++++++++++-----------------
 include/hw/display/bcm2835_fb.h |  8 +++++
 3 files changed, 81 insertions(+), 29 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 76a10072b4..3edb8b5cfc 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -34,6 +34,13 @@
 #define DEFAULT_VCRAM_SIZE 0x4000000
 #define BCM2835_FB_OFFSET  0x00100000
 
+/* Maximum permitted framebuffer size; experimentally determined on an rpi2 */
+#define XRES_MAX 3840
+#define YRES_MAX 2560
+/* Framebuffer size used if guest requests zero size */
+#define XRES_SMALL 592
+#define YRES_SMALL 488
+
 static void fb_invalidate_display(void *opaque)
 {
     BCM2835FBState *s = BCM2835_FB(opaque);
@@ -202,6 +209,45 @@ static void fb_update_display(void *opaque)
     s->invalidate = false;
 }
 
+void bcm2835_fb_validate_config(BCM2835FBConfig *config)
+{
+    /*
+     * Validate the config, and clip any bogus values into range,
+     * as the hardware does. Note that fb_update_display() relies on
+     * this happening to prevent it from performing out-of-range
+     * accesses on redraw.
+     */
+    config->xres = MIN(config->xres, XRES_MAX);
+    config->xres_virtual = MIN(config->xres_virtual, XRES_MAX);
+    config->yres = MIN(config->yres, YRES_MAX);
+    config->yres_virtual = MIN(config->yres_virtual, YRES_MAX);
+
+    /*
+     * These are not minima: a 40x40 framebuffer will be accepted.
+     * They're only used as defaults if the guest asks for zero size.
+     */
+    if (config->xres == 0) {
+        config->xres = XRES_SMALL;
+    }
+    if (config->yres == 0) {
+        config->yres = YRES_SMALL;
+    }
+    if (config->xres_virtual == 0) {
+        config->xres_virtual = config->xres;
+    }
+    if (config->yres_virtual == 0) {
+        config->yres_virtual = config->yres;
+    }
+
+    if (fb_use_offsets(config)) {
+        /* Clip the offsets so the viewport is within the physical screen */
+        config->xoffset = MIN(config->xoffset,
+                              config->xres_virtual - config->xres);
+        config->yoffset = MIN(config->yoffset,
+                              config->yres_virtual - config->yres);
+    }
+}
+
 static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
 {
     uint32_t pitch;
@@ -238,8 +284,6 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
 {
     s->lock = true;
 
-    /* TODO: input validation! */
-
     s->config = *newconfig;
 
     s->invalidate = true;
diff --git a/hw/misc/bcm2835_property.c b/hw/misc/bcm2835_property.c
index e3ab677891..145427ae0f 100644
--- a/hw/misc/bcm2835_property.c
+++ b/hw/misc/bcm2835_property.c
@@ -155,16 +155,6 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         case 0x00040002: /* Blank screen */
             resplen = 4;
             break;
-        case 0x00040003: /* Get physical display width/height */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
-            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
-            resplen = 8;
-            break;
-        case 0x00040004: /* Get virtual display width/height */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
-            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
-            resplen = 8;
-            break;
         case 0x00044003: /* Test physical display width/height */
         case 0x00044004: /* Test virtual display width/height */
             resplen = 8;
@@ -172,29 +162,35 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
         case 0x00048003: /* Set physical display width/height */
             fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12);
             fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
+            /* fall through */
+        case 0x00040003: /* Get physical display width/height */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres);
             resplen = 8;
             break;
         case 0x00048004: /* Set virtual display width/height */
             fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12);
             fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
+            /* fall through */
+        case 0x00040004: /* Get virtual display width/height */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual);
             resplen = 8;
             break;
-        case 0x00040005: /* Get depth */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
-            resplen = 4;
-            break;
         case 0x00044005: /* Test depth */
             resplen = 4;
             break;
         case 0x00048005: /* Set depth */
             fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            resplen = 4;
-            break;
-        case 0x00040006: /* Get pixel order */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
+            /* fall through */
+        case 0x00040005: /* Get depth */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp);
             resplen = 4;
             break;
         case 0x00044006: /* Test pixel order */
@@ -202,11 +198,11 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00048006: /* Set pixel order */
             fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
-            resplen = 4;
-            break;
-        case 0x00040007: /* Get alpha */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
+            /* fall through */
+        case 0x00040006: /* Get pixel order */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo);
             resplen = 4;
             break;
         case 0x00044007: /* Test pixel alpha */
@@ -214,7 +210,11 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
             break;
         case 0x00048007: /* Set alpha */
             fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
+            /* fall through */
+        case 0x00040007: /* Get alpha */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha);
             resplen = 4;
             break;
         case 0x00040008: /* Get pitch */
@@ -222,18 +222,18 @@ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value)
                         bcm2835_fb_get_pitch(&fbconfig));
             resplen = 4;
             break;
-        case 0x00040009: /* Get virtual offset */
-            stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
-            stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
-            resplen = 8;
-            break;
         case 0x00044009: /* Test virtual offset */
             resplen = 8;
             break;
         case 0x00048009: /* Set virtual offset */
             fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12);
             fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16);
+            bcm2835_fb_validate_config(&fbconfig);
             fbconfig_updated = true;
+            /* fall through */
+        case 0x00040009: /* Get virtual offset */
+            stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset);
+            stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset);
             resplen = 8;
             break;
         case 0x0004000a: /* Get/Test/Set overscan */
diff --git a/include/hw/display/bcm2835_fb.h b/include/hw/display/bcm2835_fb.h
index d992c60c12..228988ba05 100644
--- a/include/hw/display/bcm2835_fb.h
+++ b/include/hw/display/bcm2835_fb.h
@@ -76,4 +76,12 @@ static inline uint32_t bcm2835_fb_get_size(BCM2835FBConfig *config)
     return yres * bcm2835_fb_get_pitch(config);
 }
 
+/**
+ * bcm2835_fb_validate_config: check provided config
+ *
+ * Validates the configuration information provided by the guest and
+ * adjusts it if necessary.
+ */
+void bcm2835_fb_validate_config(BCM2835FBConfig *config);
+
 #endif

From cfb7ba983857e40e88bd3219aaab908862581ac0 Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:50 +0100
Subject: [PATCH 51/52] hw/display/bcm2835_fb: Validate bcm2835_fb_mbox_push()
 config

Refactor bcm2835_fb_mbox_push() to work by calling
bcm2835_fb_validate_config() and bcm2835_fb_reconfigure(),
so that config set this way is also validated.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180814144436.679-9-peter.maydell@linaro.org
---
 hw/display/bcm2835_fb.c | 63 ++++++++++++++++++++---------------------
 1 file changed, 31 insertions(+), 32 deletions(-)

diff --git a/hw/display/bcm2835_fb.c b/hw/display/bcm2835_fb.c
index 3edb8b5cfc..d534d00a65 100644
--- a/hw/display/bcm2835_fb.c
+++ b/hw/display/bcm2835_fb.c
@@ -248,38 +248,6 @@ void bcm2835_fb_validate_config(BCM2835FBConfig *config)
     }
 }
 
-static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
-{
-    uint32_t pitch;
-    uint32_t size;
-
-    value &= ~0xf;
-
-    s->lock = true;
-
-    s->config.xres = ldl_le_phys(&s->dma_as, value);
-    s->config.yres = ldl_le_phys(&s->dma_as, value + 4);
-    s->config.xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
-    s->config.yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
-    s->config.bpp = ldl_le_phys(&s->dma_as, value + 20);
-    s->config.xoffset = ldl_le_phys(&s->dma_as, value + 24);
-    s->config.yoffset = ldl_le_phys(&s->dma_as, value + 28);
-
-    s->config.base = s->vcram_base | (value & 0xc0000000);
-    s->config.base += BCM2835_FB_OFFSET;
-
-    pitch = bcm2835_fb_get_pitch(&s->config);
-    size = bcm2835_fb_get_size(&s->config);
-
-    stl_le_phys(&s->dma_as, value + 16, pitch);
-    stl_le_phys(&s->dma_as, value + 32, s->config.base);
-    stl_le_phys(&s->dma_as, value + 36, size);
-
-    s->invalidate = true;
-    qemu_console_resize(s->con, s->config.xres, s->config.yres);
-    s->lock = false;
-}
-
 void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
 {
     s->lock = true;
@@ -291,6 +259,37 @@ void bcm2835_fb_reconfigure(BCM2835FBState *s, BCM2835FBConfig *newconfig)
     s->lock = false;
 }
 
+static void bcm2835_fb_mbox_push(BCM2835FBState *s, uint32_t value)
+{
+    uint32_t pitch;
+    uint32_t size;
+    BCM2835FBConfig newconf;
+
+    value &= ~0xf;
+
+    newconf.xres = ldl_le_phys(&s->dma_as, value);
+    newconf.yres = ldl_le_phys(&s->dma_as, value + 4);
+    newconf.xres_virtual = ldl_le_phys(&s->dma_as, value + 8);
+    newconf.yres_virtual = ldl_le_phys(&s->dma_as, value + 12);
+    newconf.bpp = ldl_le_phys(&s->dma_as, value + 20);
+    newconf.xoffset = ldl_le_phys(&s->dma_as, value + 24);
+    newconf.yoffset = ldl_le_phys(&s->dma_as, value + 28);
+
+    newconf.base = s->vcram_base | (value & 0xc0000000);
+    newconf.base += BCM2835_FB_OFFSET;
+
+    bcm2835_fb_validate_config(&newconf);
+
+    pitch = bcm2835_fb_get_pitch(&newconf);
+    size = bcm2835_fb_get_size(&newconf);
+
+    stl_le_phys(&s->dma_as, value + 16, pitch);
+    stl_le_phys(&s->dma_as, value + 32, newconf.base);
+    stl_le_phys(&s->dma_as, value + 36, size);
+
+    bcm2835_fb_reconfigure(s, &newconf);
+}
+
 static uint64_t bcm2835_fb_read(void *opaque, hwaddr offset, unsigned size)
 {
     BCM2835FBState *s = opaque;

From 239cb6feb298a31faa40b7e97ced107bf9c2f2bf Mon Sep 17 00:00:00 2001
From: Peter Maydell <peter.maydell@linaro.org>
Date: Fri, 24 Aug 2018 13:17:50 +0100
Subject: [PATCH 52/52] hw/arm/mps2: Fix ID register errors on AN511 and AN385

Fix MPS2 SCC config register values for the mps2-an511
and mps2-an385 boards:
 * the SCC_AID bits [23:20] specify the FPGA build target board revision,
   and the SCC_CFG4 register specifies the actual board revision, so
   these should have matching values. Claim to be board revision C,
   consistently -- we had the revision in the wrong part of SCC_AID.
 * SCC_ID bits [15:4] should be the board number in hex, not decimal

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180823175225.22612-1-peter.maydell@linaro.org
---
 hw/arm/mps2.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
index 564624629d..e3d698ba6c 100644
--- a/hw/arm/mps2.c
+++ b/hw/arm/mps2.c
@@ -312,7 +312,7 @@ static void mps2_common_init(MachineState *machine)
     sccdev = DEVICE(&mms->scc);
     qdev_set_parent_bus(sccdev, sysbus_get_default());
     qdev_prop_set_uint32(sccdev, "scc-cfg4", 0x2);
-    qdev_prop_set_uint32(sccdev, "scc-aid", 0x02000008);
+    qdev_prop_set_uint32(sccdev, "scc-aid", 0x00200008);
     qdev_prop_set_uint32(sccdev, "scc-id", mmc->scc_id);
     object_property_set_bool(OBJECT(&mms->scc), true, "realized",
                              &error_fatal);
@@ -347,7 +347,7 @@ static void mps2_an385_class_init(ObjectClass *oc, void *data)
     mc->desc = "ARM MPS2 with AN385 FPGA image for Cortex-M3";
     mmc->fpga_type = FPGA_AN385;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
-    mmc->scc_id = 0x41040000 | (385 << 4);
+    mmc->scc_id = 0x41043850;
 }
 
 static void mps2_an511_class_init(ObjectClass *oc, void *data)
@@ -358,7 +358,7 @@ static void mps2_an511_class_init(ObjectClass *oc, void *data)
     mc->desc = "ARM MPS2 with AN511 DesignStart FPGA image for Cortex-M3";
     mmc->fpga_type = FPGA_AN511;
     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
-    mmc->scc_id = 0x4104000 | (511 << 4);
+    mmc->scc_id = 0x41045110;
 }
 
 static const TypeInfo mps2_info = {