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[Qemu-devel] [PATCH 10/45] target-ppc: Disentangle hash mmu paths for cp
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From: |
David Gibson |
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Subject: |
[Qemu-devel] [PATCH 10/45] target-ppc: Disentangle hash mmu paths for cpu_ppc_handle_mmu_fault |
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Date: |
Wed, 6 Mar 2013 14:43:58 +1100 |
cpu_ppc_handle_mmu_fault() calls get_physical_address() (whose behaviour
depends on MMU type) then, if that fails, issues an appropriate exception
- which again has a number of dependencies on MMU type.
This patch starts converting cpu_ppc_handle_mmu_fault() to have a
single switch on MMU type, calling MMU specific fault handler
functions which deal with both translation and exception delivery
appropriately for the MMU type. We convert 32-bit and 64-bit hash
MMUs to this new model, but the existing code is left in place for
other MMU types for now.
Signed-off-by: David Gibson <address@hidden>
---
target-ppc/mmu-hash32.c | 124 +++++++++++++++++++++++++++++++++++++++++++++++
target-ppc/mmu-hash32.h | 2 +
target-ppc/mmu-hash64.c | 87 +++++++++++++++++++++++++++++++++
target-ppc/mmu-hash64.h | 2 +
target-ppc/mmu_helper.c | 57 ++++++----------------
5 files changed, 231 insertions(+), 41 deletions(-)
diff --git a/target-ppc/mmu-hash32.c b/target-ppc/mmu-hash32.c
index 3998d63..50f8c54 100644
--- a/target-ppc/mmu-hash32.c
+++ b/target-ppc/mmu-hash32.c
@@ -303,6 +303,7 @@ static int get_segment32(CPUPPCState *env, mmu_ctx_t *ctx,
return ret;
}
+
int ppc_hash32_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int
access_type)
{
@@ -327,3 +328,126 @@ int ppc_hash32_get_physical_address(CPUPPCState *env,
mmu_ctx_t *ctx,
return ret;
}
}
+
+int ppc_hash32_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
+ int mmu_idx)
+{
+ mmu_ctx_t ctx;
+ int access_type;
+ int ret = 0;
+
+ if (rw == 2) {
+ /* code access */
+ rw = 0;
+ access_type = ACCESS_CODE;
+ } else {
+ /* data access */
+ access_type = env->access_type;
+ }
+ ret = ppc_hash32_get_physical_address(env, &ctx, address, rw, access_type);
+ 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 (access_type == ACCESS_CODE) {
+ 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 (rw == 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 (rw == 1) {
+ env->spr[SPR_DSISR] = 0x0A000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x08000000;
+ }
+ break;
+ case -4:
+ /* Direct store exception */
+ switch (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 (rw == 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 (rw == 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;
+}
diff --git a/target-ppc/mmu-hash32.h b/target-ppc/mmu-hash32.h
index fbe40be..eccfdf6 100644
--- a/target-ppc/mmu-hash32.h
+++ b/target-ppc/mmu-hash32.h
@@ -3,5 +3,7 @@
int ppc_hash32_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int
access_type);
+int ppc_hash32_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
+ int mmu_idx);
#endif /* __MMU_HASH32_H__ */
diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c
index c727298..32825ff 100644
--- a/target-ppc/mmu-hash64.c
+++ b/target-ppc/mmu-hash64.c
@@ -450,3 +450,90 @@ int ppc_hash64_get_physical_address(CPUPPCState *env,
mmu_ctx_t *ctx,
return get_segment64(env, ctx, eaddr, rw, access_type);
}
}
+
+int ppc_hash64_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
+ int mmu_idx)
+{
+ mmu_ctx_t ctx;
+ int access_type;
+ int ret = 0;
+
+ if (rw == 2) {
+ /* code access */
+ rw = 0;
+ access_type = ACCESS_CODE;
+ } else {
+ /* data access */
+ access_type = env->access_type;
+ }
+ ret = ppc_hash64_get_physical_address(env, &ctx, address, rw, access_type);
+ 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 (access_type == ACCESS_CODE) {
+ switch (ret) {
+ case -1:
+ 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 -5:
+ /* No match in segment table */
+ env->exception_index = POWERPC_EXCP_ISEG;
+ env->error_code = 0;
+ 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 (rw == 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 (rw == 1) {
+ env->spr[SPR_DSISR] = 0x0A000000;
+ } else {
+ env->spr[SPR_DSISR] = 0x08000000;
+ }
+ break;
+ case -5:
+ /* No match in segment table */
+ env->exception_index = POWERPC_EXCP_DSEG;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = address;
+ break;
+ }
+ }
+#if 0
+ printf("%s: set exception to %d %02x\n", __func__,
+ env->exception, env->error_code);
+#endif
+ ret = 1;
+ }
+
+ return ret;
+}
diff --git a/target-ppc/mmu-hash64.h b/target-ppc/mmu-hash64.h
index cb3f565..441e318 100644
--- a/target-ppc/mmu-hash64.h
+++ b/target-ppc/mmu-hash64.h
@@ -6,6 +6,8 @@ void dump_slb(FILE *f, fprintf_function cpu_fprintf,
CPUPPCState *env);
int ppc_store_slb (CPUPPCState *env, target_ulong rb, target_ulong rs);
int ppc_hash64_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong eaddr, int rw, int
access_type);
+int ppc_hash64_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rw,
+ int mmu_idx);
#endif
#endif /* !defined (__MMU_HASH64_H__) */
diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index ce39f49..287334f 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -1438,6 +1438,22 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env,
target_ulong address, int rw,
int access_type;
int ret = 0;
+ switch (env->mmu_model) {
+#if defined(TARGET_PPC64)
+ case POWERPC_MMU_64B:
+ case POWERPC_MMU_2_06:
+ case POWERPC_MMU_2_06d:
+ return ppc_hash64_handle_mmu_fault(env, address, rw, mmu_idx);
+#endif
+
+ case POWERPC_MMU_32B:
+ case POWERPC_MMU_601:
+ return ppc_hash32_handle_mmu_fault(env, address, rw, mmu_idx);
+
+ default:
+ ; /* Otherwise fall through to the general code below */
+ }
+
if (rw == 2) {
/* code access */
rw = 0;
@@ -1475,16 +1491,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env,
target_ulong address, int rw,
env->spr[SPR_40x_DEAR] = address;
env->spr[SPR_40x_ESR] = 0x00000000;
break;
- case POWERPC_MMU_32B:
- case POWERPC_MMU_601:
-#if defined(TARGET_PPC64)
- case POWERPC_MMU_64B:
- case POWERPC_MMU_2_06:
- case POWERPC_MMU_2_06d:
-#endif
- env->exception_index = POWERPC_EXCP_ISI;
- env->error_code = 0x40000000;
- break;
case POWERPC_MMU_BOOKE206:
booke206_update_mas_tlb_miss(env, address, rw);
/* fall through */
@@ -1526,13 +1532,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env,
target_ulong address, int rw,
env->exception_index = POWERPC_EXCP_ISI;
env->error_code = 0x10000000;
break;
-#if defined(TARGET_PPC64)
- case -5:
- /* No match in segment table */
- env->exception_index = POWERPC_EXCP_ISEG;
- env->error_code = 0;
- break;
-#endif
}
} else {
switch (ret) {
@@ -1580,22 +1579,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env,
target_ulong address, int rw,
env->spr[SPR_40x_ESR] = 0x00000000;
}
break;
- case POWERPC_MMU_32B:
- case POWERPC_MMU_601:
-#if defined(TARGET_PPC64)
- case POWERPC_MMU_64B:
- case POWERPC_MMU_2_06:
- case POWERPC_MMU_2_06d:
-#endif
- env->exception_index = POWERPC_EXCP_DSI;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- if (rw == 1) {
- env->spr[SPR_DSISR] = 0x42000000;
- } else {
- env->spr[SPR_DSISR] = 0x40000000;
- }
- break;
case POWERPC_MMU_MPC8xx:
/* XXX: TODO */
cpu_abort(env, "MPC8xx MMU model is not implemented\n");
@@ -1681,14 +1664,6 @@ int cpu_ppc_handle_mmu_fault(CPUPPCState *env,
target_ulong address, int rw,
break;
}
break;
-#if defined(TARGET_PPC64)
- case -5:
- /* No match in segment table */
- env->exception_index = POWERPC_EXCP_DSEG;
- env->error_code = 0;
- env->spr[SPR_DAR] = address;
- break;
-#endif
}
}
#if 0
--
1.7.10.4
- [Qemu-devel] [PATCH 08/45] target-ppc: Rework get_physical_address(), (continued)
- [Qemu-devel] [PATCH 08/45] target-ppc: Rework get_physical_address(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 09/45] target-ppc: Disentangle get_physical_address() paths, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 13/45] target-ppc: Don't share get_pteg_offset() between 32 and 64-bit, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 15/45] target-ppc: mmu_ctx_t should not be a global type, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 05/45] target-ppc: Disentangle pte_check(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 19/45] mmu-hash64: Remove nx from mmu_ctx_hash64, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 04/45] target-ppc: Move SLB handling into a mmu-hash64.c, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 01/45] target-ppc: Remove vestigial PowerPC 620 support, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 11/45] target-ppc: Disentangle hash mmu versions of cpu_get_phys_page_debug(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 12/45] target-ppc: Disentangle hash mmu helper functions, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 10/45] target-ppc: Disentangle hash mmu paths for cpu_ppc_handle_mmu_fault,
David Gibson <=
- [Qemu-devel] [PATCH 17/45] mmu-hash*: Add hash pte load/store helpers, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 06/45] target-ppc: Disentangle find_pte(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 20/45] mmu-hash*: Remove eaddr field from mmu_ctx_hash{32, 64}, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 16/45] mmu-hash*: Add header file for definitions, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 14/45] target-ppc: Disentangle BAT code for 32-bit hash MMUs, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 22/45] mmu-hash32: Split out handling of direct store segments, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 07/45] target-ppc: Disentangle get_segment(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 21/45] mmu-hash*: Combine ppc_hash{32, 64}_get_physical_address and get_segment{32, 64}(), David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 18/45] mmu-hash*: Reduce use of access_type, David Gibson, 2013/03/05
- [Qemu-devel] [PATCH 23/45] mmu-hash32: Split direct store segment handling into a helper, David Gibson, 2013/03/05