From: Alexander Graf <agraf@suse.de>
Date: Tue, 18 Oct 2011 00:00:51 +0000 (+0200)
Subject: PPC: Disable non-440 CPUs for ppcemb target
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~1405^2~17^2~1434^2~1^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f0ad8c340145b246982885addef1aac183790706;p=sdk%2Femulator%2Fqemu.git

PPC: Disable non-440 CPUs for ppcemb target

The sole reason we have the ppcemb target is to support MMUs that have
less than the usual 4k possible page size. There are very few of these
chips and I don't want to add additional QA and testing burden to everyone
to ensure that code still works when TARGET_PAGE_SIZE is not 4k.

So this patch disables all CPUs except for MMU_BOOKE capable ones from
the ppcemb target.

Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index 7de097d945..f0ae1d1764 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -10047,11 +10047,27 @@ int cpu_ppc_register_internal (CPUPPCState *env, const ppc_def_t *def)
     return 0;
 }
 
+static bool ppc_cpu_usable(const ppc_def_t *def)
+{
+#if defined(TARGET_PPCEMB)
+    /* When using the ppcemb target, we only support 440 style cores */
+    if (def->mmu_model != POWERPC_MMU_BOOKE) {
+        return false;
+    }
+#endif
+
+    return true;
+}
+
 const ppc_def_t *ppc_find_by_pvr(uint32_t pvr)
 {
     int i;
 
     for (i = 0; i < ARRAY_SIZE(ppc_defs); i++) {
+        if (!ppc_cpu_usable(&ppc_defs[i])) {
+            continue;
+        }
+
         /* If we have an exact match, we're done */
         if (pvr == ppc_defs[i].pvr) {
             return &ppc_defs[i];
@@ -10091,6 +10107,10 @@ const ppc_def_t *cpu_ppc_find_by_name (const char *name)
     ret = NULL;
     max = ARRAY_SIZE(ppc_defs);
     for (i = 0; i < max; i++) {
+        if (!ppc_cpu_usable(&ppc_defs[i])) {
+            continue;
+        }
+
         if (strcasecmp(name, ppc_defs[i].name) == 0) {
             ret = &ppc_defs[i];
             break;
@@ -10106,6 +10126,10 @@ void ppc_cpu_list (FILE *f, fprintf_function cpu_fprintf)
 
     max = ARRAY_SIZE(ppc_defs);
     for (i = 0; i < max; i++) {
+        if (!ppc_cpu_usable(&ppc_defs[i])) {
+            continue;
+        }
+
         (*cpu_fprintf)(f, "PowerPC %-16s PVR %08x\n",
                        ppc_defs[i].name, ppc_defs[i].pvr);
     }