target-ppc: Remove vestigial PowerPC 620 support

The PowerPC 620 was the very first 64-bit PowerPC implementation, but
hardly anyone ever actually used the chips.  qemu notionally supports the
620, but since we don't actually have code to implement the segment table,
the support is broken (quite likely in other ways too).

This patch, therefore, removes all remaining pieces of 620 support, to
stop it cluttering up the platforms we actually care about.  This includes
removing support for the ASR register, used only on segment table based
machines.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 5 insertions, 39 deletions

diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index 1cc1c1649a..2f01b319bf 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -1659,7 +1659,6 @@ static inline int check_physical(CPUPPCState *env, mmu_ctx_t *ctx,
         ctx->prot |= PAGE_WRITE;
         break;
 #if defined(TARGET_PPC64)
-    case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
     case POWERPC_MMU_2_06:
     case POWERPC_MMU_2_06d:
@@ -1741,7 +1740,6 @@ static int get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
                 ret = get_bat(env, ctx, eaddr, rw, access_type);
             }
 #if defined(TARGET_PPC64)
-        case POWERPC_MMU_620:
         case POWERPC_MMU_64B:
         case POWERPC_MMU_2_06:
         case POWERPC_MMU_2_06d:
@@ -1883,7 +1881,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
                 case POWERPC_MMU_32B:
                 case POWERPC_MMU_601:
 #if defined(TARGET_PPC64)
-                case POWERPC_MMU_620:
                 case POWERPC_MMU_64B:
                 case POWERPC_MMU_2_06:
                 case POWERPC_MMU_2_06d:
@@ -1935,14 +1932,8 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
 #if defined(TARGET_PPC64)
             case -5:
                 /* No match in segment table */
-                if (env->mmu_model == POWERPC_MMU_620) {
-                    env->exception_index = POWERPC_EXCP_ISI;
-                    /* XXX: this might be incorrect */
-                    env->error_code = 0x40000000;
-                } else {
-                    env->exception_index = POWERPC_EXCP_ISEG;
-                    env->error_code = 0;
-                }
+                env->exception_index = POWERPC_EXCP_ISEG;
+                env->error_code = 0;
                 break;
 #endif
             }
@@ -1995,7 +1986,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
                 case POWERPC_MMU_32B:
                 case POWERPC_MMU_601:
 #if defined(TARGET_PPC64)
-                case POWERPC_MMU_620:
                 case POWERPC_MMU_64B:
                 case POWERPC_MMU_2_06:
                 case POWERPC_MMU_2_06d:
@@ -2097,21 +2087,9 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
 #if defined(TARGET_PPC64)
             case -5:
                 /* No match in segment table */
-                if (env->mmu_model == POWERPC_MMU_620) {
-                    env->exception_index = POWERPC_EXCP_DSI;
-                    env->error_code = 0;
-                    env->spr[SPR_DAR] = address;
-                    /* XXX: this might be incorrect */
-                    if (rw == 1) {
-                        env->spr[SPR_DSISR] = 0x42000000;
-                    } else {
-                        env->spr[SPR_DSISR] = 0x40000000;
-                    }
-                } else {
-                    env->exception_index = POWERPC_EXCP_DSEG;
-                    env->error_code = 0;
-                    env->spr[SPR_DAR] = address;
-                }
+                env->exception_index = POWERPC_EXCP_DSEG;
+                env->error_code = 0;
+                env->spr[SPR_DAR] = address;
                 break;
 #endif
             }
@@ -2326,7 +2304,6 @@ void ppc_tlb_invalidate_all(CPUPPCState *env)
     case POWERPC_MMU_32B:
     case POWERPC_MMU_601:
 #if defined(TARGET_PPC64)
-    case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
     case POWERPC_MMU_2_06:
     case POWERPC_MMU_2_06d:
@@ -2396,7 +2373,6 @@ void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr)
         tlb_flush_page(env, addr | (0xF << 28));
         break;
 #if defined(TARGET_PPC64)
-    case POWERPC_MMU_620:
     case POWERPC_MMU_64B:
     case POWERPC_MMU_2_06:
     case POWERPC_MMU_2_06d:
@@ -2420,16 +2396,6 @@ void ppc_tlb_invalidate_one(CPUPPCState *env, target_ulong addr)
 
 /*****************************************************************************/
 /* Special registers manipulation */
-#if defined(TARGET_PPC64)
-void ppc_store_asr(CPUPPCState *env, target_ulong value)
-{
-    if (env->asr != value) {
-        env->asr = value;
-        tlb_flush(env, 1);
-    }
-}
-#endif
-
 void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
 {
     LOG_MMU("%s: " TARGET_FMT_lx "\n", __func__, value);