hw/ppc: add a ppc_create_page_sizes_prop() helper routine

The exact same routine will be used in PowerNV.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/Makefile.objs

@@ -1,5 +1,5 @@
 # shared objects
-obj-y += ppc.o ppc_booke.o
+obj-y += ppc.o ppc_booke.o fdt.o
 # IBM pSeries (sPAPR)
 obj-$(CONFIG_PSERIES) += spapr.o spapr_vio.o spapr_events.o
 obj-$(CONFIG_PSERIES) += spapr_hcall.o spapr_iommu.o spapr_rtas.o

hw/ppc/fdt.c

@@ -0,0 +1,49 @@
+/*
+ * QEMU PowerPC helper routines for the device tree.
+ *
+ * Copyright (C) 2016 IBM Corp.
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "target-ppc/cpu.h"
+
+#include "hw/ppc/fdt.h"
+
+#if defined(TARGET_PPC64)
+size_t ppc_create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
+                                     size_t maxsize)
+{
+    size_t maxcells = maxsize / sizeof(uint32_t);
+    int i, j, count;
+    uint32_t *p = prop;
+
+    for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
+        struct ppc_one_seg_page_size *sps = &env->sps.sps[i];
+
+        if (!sps->page_shift) {
+            break;
+        }
+        for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
+            if (sps->enc[count].page_shift == 0) {
+                break;
+            }
+        }
+        if ((p - prop) >= (maxcells - 3 - count * 2)) {
+            break;
+        }
+        *(p++) = cpu_to_be32(sps->page_shift);
+        *(p++) = cpu_to_be32(sps->slb_enc);
+        *(p++) = cpu_to_be32(count);
+        for (j = 0; j < count; j++) {
+            *(p++) = cpu_to_be32(sps->enc[j].page_shift);
+            *(p++) = cpu_to_be32(sps->enc[j].pte_enc);
+        }
+    }
+
+    return (p - prop) * sizeof(uint32_t);
+}
+#endif

hw/ppc/spapr.c

@@ -250,40 +250,6 @@ static int spapr_fixup_cpu_dt(void *fdt, sPAPRMachineState *spapr)
     return ret;
 }
 
-
-static size_t create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
-                                     size_t maxsize)
-{
-    size_t maxcells = maxsize / sizeof(uint32_t);
-    int i, j, count;
-    uint32_t *p = prop;
-
-    for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
-        struct ppc_one_seg_page_size *sps = &env->sps.sps[i];
-
-        if (!sps->page_shift) {
-            break;
-        }
-        for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
-            if (sps->enc[count].page_shift == 0) {
-                break;
-            }
-        }
-        if ((p - prop) >= (maxcells - 3 - count * 2)) {
-            break;
-        }
-        *(p++) = cpu_to_be32(sps->page_shift);
-        *(p++) = cpu_to_be32(sps->slb_enc);
-        *(p++) = cpu_to_be32(count);
-        for (j = 0; j < count; j++) {
-            *(p++) = cpu_to_be32(sps->enc[j].page_shift);
-            *(p++) = cpu_to_be32(sps->enc[j].pte_enc);
-        }
-    }
-
-    return (p - prop) * sizeof(uint32_t);
-}
-
 static hwaddr spapr_node0_size(void)
 {
     MachineState *machine = MACHINE(qdev_get_machine());
@@ -689,7 +655,7 @@ static void spapr_populate_cpu_dt(CPUState *cs, void *fdt, int offset,
         _FDT((fdt_setprop_cell(fdt, offset, "ibm,dfp", 1)));
     }
 
-    page_sizes_prop_size = create_page_sizes_prop(env, page_sizes_prop,
+    page_sizes_prop_size = ppc_create_page_sizes_prop(env, page_sizes_prop,
                                                   sizeof(page_sizes_prop));
     if (page_sizes_prop_size) {
         _FDT((fdt_setprop(fdt, offset, "ibm,segment-page-sizes",

include/hw/ppc/fdt.h

@@ -12,6 +12,8 @@
 
 #include "qemu/error-report.h"
 
+typedef struct CPUPPCState CPUPPCState;
+
 #define _FDT(exp)                                                  \
     do {                                                           \
         int ret = (exp);                                           \
@@ -22,4 +24,7 @@
         }                                                          \
     } while (0)
 
+size_t ppc_create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
+                                  size_t maxsize);
+
 #endif /* PPC_FDT_H */