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path: root/target-ppc/mmu-hash32.c
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Diffstat (limited to 'target-ppc/mmu-hash32.c')
-rw-r--r--target-ppc/mmu-hash32.c250
1 files changed, 112 insertions, 138 deletions
diff --git a/target-ppc/mmu-hash32.c b/target-ppc/mmu-hash32.c
index 5ec1a09..f6adf22 100644
--- a/target-ppc/mmu-hash32.c
+++ b/target-ppc/mmu-hash32.c
@@ -238,7 +238,9 @@ static int ppc_hash32_direct_store(CPUPPCState *env, target_ulong sr,
if (rwx == 2) {
/* No code fetch is allowed in direct-store areas */
- return -4;
+ env->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x10000000;
+ return 1;
}
switch (env->access_type) {
@@ -247,10 +249,20 @@ static int ppc_hash32_direct_store(CPUPPCState *env, target_ulong sr,
break;
case ACCESS_FLOAT:
/* Floating point load/store */
- return -4;
+ env->exception_index = POWERPC_EXCP_ALIGN;
+ env->error_code = POWERPC_EXCP_ALIGN_FP;
+ env->spr[SPR_DAR] = eaddr;
+ return 1;
case ACCESS_RES:
/* lwarx, ldarx or srwcx. */
- return -4;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x06000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x04000000;
+ }
+ return 1;
case ACCESS_CACHE:
/* dcba, dcbt, dcbtst, dcbf, dcbi, dcbst, dcbz, or icbi */
/* Should make the instruction do no-op.
@@ -260,17 +272,33 @@ static int ppc_hash32_direct_store(CPUPPCState *env, target_ulong sr,
return 0;
case ACCESS_EXT:
/* eciwx or ecowx */
- return -4;
+ env->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x06100000;
+ } else {
+ env->spr[SPR_DSISR] = 0x04100000;
+ }
+ return 1;
default:
qemu_log("ERROR: instruction should not need "
"address translation\n");
- return -4;
+ abort();
}
if ((rwx == 1 || key != 1) && (rwx == 0 || key != 0)) {
*raddr = eaddr;
- return 2;
+ return 0;
} else {
- return -2;
+ env->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x0a000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x08000000;
+ }
+ return 1;
}
}
@@ -352,32 +380,53 @@ static hwaddr ppc_hash32_pte_raddr(target_ulong sr, ppc_hash_pte32_t pte,
return (rpn & ~mask) | (eaddr & mask);
}
-static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx,
- target_ulong eaddr, int rwx)
+int ppc_hash32_handle_mmu_fault(CPUPPCState *env, target_ulong eaddr, int rwx,
+ int mmu_idx)
{
target_ulong sr;
hwaddr pte_offset;
ppc_hash_pte32_t pte;
+ int prot;
uint32_t new_pte1;
const int need_prot[] = {PAGE_READ, PAGE_WRITE, PAGE_EXEC};
+ hwaddr raddr;
assert((rwx == 0) || (rwx == 1) || (rwx == 2));
/* 1. Handle real mode accesses */
if (((rwx == 2) && (msr_ir == 0)) || ((rwx != 2) && (msr_dr == 0))) {
/* Translation is off */
- ctx->raddr = eaddr;
- ctx->prot = PAGE_READ | PAGE_EXEC | PAGE_WRITE;
+ raddr = eaddr;
+ tlb_set_page(env, eaddr & TARGET_PAGE_MASK, raddr & TARGET_PAGE_MASK,
+ PAGE_READ | PAGE_WRITE | PAGE_EXEC, mmu_idx,
+ TARGET_PAGE_SIZE);
return 0;
}
/* 2. Check Block Address Translation entries (BATs) */
if (env->nb_BATs != 0) {
- ctx->raddr = ppc_hash32_bat_lookup(env, eaddr, rwx, &ctx->prot);
- if (ctx->raddr != -1) {
- if (need_prot[rwx] & ~ctx->prot) {
- return -2;
+ raddr = ppc_hash32_bat_lookup(env, eaddr, rwx, &prot);
+ if (raddr != -1) {
+ if (need_prot[rwx] & ~prot) {
+ if (rwx == 2) {
+ env->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x08000000;
+ } else {
+ env->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x0a000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x08000000;
+ }
+ }
+ return 1;
}
+
+ tlb_set_page(env, eaddr & TARGET_PAGE_MASK,
+ raddr & TARGET_PAGE_MASK, prot, mmu_idx,
+ TARGET_PAGE_SIZE);
return 0;
}
}
@@ -387,30 +436,66 @@ static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx,
/* 4. Handle direct store segments */
if (sr & SR32_T) {
- return ppc_hash32_direct_store(env, sr, eaddr, rwx,
- &ctx->raddr, &ctx->prot);
+ if (ppc_hash32_direct_store(env, sr, eaddr, rwx,
+ &raddr, &prot) == 0) {
+ tlb_set_page(env, eaddr & TARGET_PAGE_MASK,
+ raddr & TARGET_PAGE_MASK, prot, mmu_idx,
+ TARGET_PAGE_SIZE);
+ return 0;
+ } else {
+ return 1;
+ }
}
/* 5. Check for segment level no-execute violation */
if ((rwx == 2) && (sr & SR32_NX)) {
- return -3;
+ env->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x10000000;
+ return 1;
}
/* 6. Locate the PTE in the hash table */
pte_offset = ppc_hash32_htab_lookup(env, sr, eaddr, &pte);
if (pte_offset == -1) {
- return -1;
+ if (rwx == 2) {
+ env->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x40000000;
+ } else {
+ env->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x42000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x40000000;
+ }
+ }
+
+ return 1;
}
LOG_MMU("found PTE at offset %08" HWADDR_PRIx "\n", pte_offset);
/* 7. Check access permissions */
- ctx->prot = ppc_hash32_pte_prot(env, sr, pte);
+ prot = ppc_hash32_pte_prot(env, sr, pte);
- if (need_prot[rwx] & ~ctx->prot) {
+ if (need_prot[rwx] & ~prot) {
/* Access right violation */
LOG_MMU("PTE access rejected\n");
- return -2;
+ if (rwx == 2) {
+ env->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x08000000;
+ } else {
+ env->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (rwx == 1) {
+ env->spr[SPR_DSISR] = 0x0a000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x08000000;
+ }
+ }
+ return 1;
}
LOG_MMU("PTE access granted !\n");
@@ -423,7 +508,7 @@ static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx,
} else {
/* Treat the page as read-only for now, so that a later write
* will pass through this function again to set the C bit */
- ctx->prot &= ~PAGE_WRITE;
+ prot &= ~PAGE_WRITE;
}
if (new_pte1 != pte.pte1) {
@@ -432,7 +517,10 @@ static int ppc_hash32_translate(CPUPPCState *env, struct mmu_ctx_hash32 *ctx,
/* 9. Determine the real address from the PTE */
- ctx->raddr = ppc_hash32_pte_raddr(sr, pte, eaddr);
+ raddr = ppc_hash32_pte_raddr(sr, pte, eaddr);
+
+ tlb_set_page(env, eaddr & TARGET_PAGE_MASK, raddr & TARGET_PAGE_MASK,
+ prot, mmu_idx, TARGET_PAGE_SIZE);
return 0;
}
@@ -470,117 +558,3 @@ hwaddr ppc_hash32_get_phys_page_debug(CPUPPCState *env, target_ulong eaddr)
return ppc_hash32_pte_raddr(sr, pte, eaddr) & TARGET_PAGE_MASK;
}
-
-int ppc_hash32_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rwx,
- int mmu_idx)
-{
- struct mmu_ctx_hash32 ctx;
- int ret = 0;
-
- ret = ppc_hash32_translate(env, &ctx, address, rwx);
- if (ret == 0) {
- tlb_set_page(env, address & TARGET_PAGE_MASK,
- ctx.raddr & TARGET_PAGE_MASK, ctx.prot,
- mmu_idx, TARGET_PAGE_SIZE);
- ret = 0;
- } else if (ret < 0) {
- LOG_MMU_STATE(env);
- if (rwx == 2) {
- switch (ret) {
- case -1:
- /* No matches in page tables or TLB */
- env->exception_index = POWERPC_EXCP_ISI;
- env->error_code = 0x40000000;
- break;
- case -2:
- /* Access rights violation */
- env->exception_index = POWERPC_EXCP_ISI;
- env->error_code = 0x08000000;
- break;
- case -3:
- /* No execute protection violation */
- env->exception_index = POWERPC_EXCP_ISI;
- env->error_code = 0x10000000;
- break;
- case -4:
- /* Direct store exception */
- /* No code fetch is allowed in direct-store areas */
- env->exception_index = POWERPC_EXCP_ISI;
- env->error_code = 0x10000000;
- break;
- }
- } else {
- switch (ret) {
- case -1:
- /* No matches in page tables or TLB */
- env->exception_index = POWERPC_EXCP_DSI;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- if (rwx == 1) {
- env->spr[SPR_DSISR] = 0x42000000;
- } else {
- env->spr[SPR_DSISR] = 0x40000000;
- }
- break;
- case -2:
- /* Access rights violation */
- env->exception_index = POWERPC_EXCP_DSI;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- if (rwx == 1) {
- env->spr[SPR_DSISR] = 0x0A000000;
- } else {
- env->spr[SPR_DSISR] = 0x08000000;
- }
- break;
- case -4:
- /* Direct store exception */
- switch (env->access_type) {
- case ACCESS_FLOAT:
- /* Floating point load/store */
- env->exception_index = POWERPC_EXCP_ALIGN;
- env->error_code = POWERPC_EXCP_ALIGN_FP;
- env->spr[SPR_DAR] = address;
- break;
- case ACCESS_RES:
- /* lwarx, ldarx or stwcx. */
- env->exception_index = POWERPC_EXCP_DSI;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- if (rwx == 1) {
- env->spr[SPR_DSISR] = 0x06000000;
- } else {
- env->spr[SPR_DSISR] = 0x04000000;
- }
- break;
- case ACCESS_EXT:
- /* eciwx or ecowx */
- env->exception_index = POWERPC_EXCP_DSI;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- if (rwx == 1) {
- env->spr[SPR_DSISR] = 0x06100000;
- } else {
- env->spr[SPR_DSISR] = 0x04100000;
- }
- break;
- default:
- printf("DSI: invalid exception (%d)\n", ret);
- env->exception_index = POWERPC_EXCP_PROGRAM;
- env->error_code =
- POWERPC_EXCP_INVAL | POWERPC_EXCP_INVAL_INVAL;
- env->spr[SPR_DAR] = address;
- break;
- }
- break;
- }
- }
-#if 0
- printf("%s: set exception to %d %02x\n", __func__,
- env->exception, env->error_code);
-#endif
- ret = 1;
- }
-
- return ret;
-}
generated by cgit v1.1 at 2024-12-27 11:25:16 +0000