target/ppc: Remove pp_check() and reuse ppc_hash32_pp_prot()

The ppc_hash32_pp_prot() function in mmu-hash32.c is the same as
pp_check() in mmu_common.c, merge these to remove duplicated code.
Define the common function as static lnline otherwise exporting the
function from mmu-hash32.c would stop the compiler inlining it which
results in slightly lower performance.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
[np: move ppc_hash32_pp_prot inline without changing it]
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

target/ppc/mmu-hash32.c

@@ -37,51 +37,6 @@
 #  define LOG_BATS(...) do { } while (0)
 #endif
 
-static int ppc_hash32_pp_prot(int key, int pp, int nx)
-{
-    int prot;
-
-    if (key == 0) {
-        switch (pp) {
-        case 0x0:
-        case 0x1:
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        default:
-            abort();
-        }
-    } else {
-        switch (pp) {
-        case 0x0:
-            prot = 0;
-            break;
-
-        case 0x1:
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        default:
-            abort();
-        }
-    }
-    if (nx == 0) {
-        prot |= PAGE_EXEC;
-    }
-
-    return prot;
-}
-
 static int ppc_hash32_pte_prot(int mmu_idx,
                                target_ulong sr, ppc_hash_pte32_t pte)
 {

target/ppc/mmu-hash32.h

@@ -102,6 +102,51 @@ static inline void ppc_hash32_store_hpte1(PowerPCCPU *cpu,
     stl_phys(CPU(cpu)->as, base + pte_offset + HASH_PTE_SIZE_32 / 2, pte1);
 }
 
+static inline int ppc_hash32_pp_prot(bool key, int pp, bool nx)
+{
+    int prot;
+
+    if (key == 0) {
+        switch (pp) {
+        case 0x0:
+        case 0x1:
+        case 0x2:
+            prot = PAGE_READ | PAGE_WRITE;
+            break;
+
+        case 0x3:
+            prot = PAGE_READ;
+            break;
+
+        default:
+            abort();
+        }
+    } else {
+        switch (pp) {
+        case 0x0:
+            prot = 0;
+            break;
+
+        case 0x1:
+        case 0x3:
+            prot = PAGE_READ;
+            break;
+
+        case 0x2:
+            prot = PAGE_READ | PAGE_WRITE;
+            break;
+
+        default:
+            abort();
+        }
+    }
+    if (nx == 0) {
+        prot |= PAGE_EXEC;
+    }
+
+    return prot;
+}
+
 typedef struct {
     uint32_t pte0, pte1;
 } ppc_hash_pte32_t;

target/ppc/mmu_common.c

@@ -77,44 +77,6 @@ void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
 /*****************************************************************************/
 /* PowerPC MMU emulation */
 
-static int pp_check(int key, int pp, int nx)
-{
-    int access;
-
-    /* Compute access rights */
-    access = 0;
-    if (key == 0) {
-        switch (pp) {
-        case 0x0:
-        case 0x1:
-        case 0x2:
-            access |= PAGE_WRITE;
-            /* fall through */
-        case 0x3:
-            access |= PAGE_READ;
-            break;
-        }
-    } else {
-        switch (pp) {
-        case 0x0:
-            access = 0;
-            break;
-        case 0x1:
-        case 0x3:
-            access = PAGE_READ;
-            break;
-        case 0x2:
-            access = PAGE_READ | PAGE_WRITE;
-            break;
-        }
-    }
-    if (nx == 0) {
-        access |= PAGE_EXEC;
-    }
-
-    return access;
-}
-
 int ppc6xx_tlb_getnum(CPUPPCState *env, target_ulong eaddr,
                                     int way, int is_code)
 {
@@ -137,7 +99,7 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
                                 MMUAccessType access_type)
 {
     target_ulong ptem, mmask;
-    int access, ret, pteh, ptev, pp;
+    int ret, pteh, ptev, pp;
 
     ret = -1;
     /* Check validity and table match */
@@ -156,11 +118,9 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
                     return -3;
                 }
             }
-            /* Compute access rights */
-            access = pp_check(ctx->key, pp, ctx->nx);
             /* Keep the matching PTE information */
             ctx->raddr = pte1;
-            ctx->prot = access;
+            ctx->prot = ppc_hash32_pp_prot(ctx->key, pp, ctx->nx);
             if (check_prot_access_type(ctx->prot, access_type)) {
                 /* Access granted */
                 qemu_log_mask(CPU_LOG_MMU, "PTE access granted !\n");