aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--target-ppc/cpu.h3
-rw-r--r--target-ppc/mmu-hash32.c96
-rw-r--r--target-ppc/mmu-hash64.c99
-rw-r--r--target-ppc/mmu_helper.c11
4 files changed, 193 insertions, 16 deletions
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 716ffe0..41cd5d6 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1133,9 +1133,6 @@ void ppc_hw_interrupt (CPUPPCState *env);
#if !defined(CONFIG_USER_ONLY)
void ppc_store_sdr1 (CPUPPCState *env, target_ulong value);
-int pp_check(int key, int pp, int nx);
-int check_prot(int prot, int rw, int access_type);
-int pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p, int ret, int rw);
hwaddr get_pteg_offset(CPUPPCState *env, hwaddr hash, int pte_size);
int get_bat(CPUPPCState *env, mmu_ctx_t *ctx,
target_ulong virtual, int rw, int type);
diff --git a/target-ppc/mmu-hash32.c b/target-ppc/mmu-hash32.c
index c0e5742..4b7598b 100644
--- a/target-ppc/mmu-hash32.c
+++ b/target-ppc/mmu-hash32.c
@@ -37,6 +37,71 @@
#define PTE_PTEM_MASK 0x7FFFFFBF
#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
+static int ppc_hash32_pp_check(int key, int pp, int nx)
+{
+ int access;
+
+ /* Compute access rights */
+ access = 0;
+ if (key == 0) {
+ switch (pp) {
+ case 0x0:
+ case 0x1:
+ case 0x2:
+ access |= PAGE_WRITE;
+ /* No break here */
+ case 0x3:
+ access |= PAGE_READ;
+ break;
+ }
+ } else {
+ switch (pp) {
+ case 0x0:
+ access = 0;
+ break;
+ case 0x1:
+ case 0x3:
+ access = PAGE_READ;
+ break;
+ case 0x2:
+ access = PAGE_READ | PAGE_WRITE;
+ break;
+ }
+ }
+ if (nx == 0) {
+ access |= PAGE_EXEC;
+ }
+
+ return access;
+}
+
+static int ppc_hash32_check_prot(int prot, int rw, int access_type)
+{
+ int ret;
+
+ if (access_type == ACCESS_CODE) {
+ if (prot & PAGE_EXEC) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ } else if (rw) {
+ if (prot & PAGE_WRITE) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ } else {
+ if (prot & PAGE_READ) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ }
+
+ return ret;
+}
+
static inline int pte_is_valid_hash32(target_ulong pte0)
{
return pte0 & 0x80000000 ? 1 : 0;
@@ -66,11 +131,11 @@ static int pte_check_hash32(mmu_ctx_t *ctx, target_ulong pte0,
}
}
/* Compute access rights */
- access = pp_check(ctx->key, pp, ctx->nx);
+ access = ppc_hash32_pp_check(ctx->key, pp, ctx->nx);
/* Keep the matching PTE informations */
ctx->raddr = pte1;
ctx->prot = access;
- ret = check_prot(ctx->prot, rw, type);
+ ret = ppc_hash32_check_prot(ctx->prot, rw, type);
if (ret == 0) {
/* Access granted */
LOG_MMU("PTE access granted !\n");
@@ -84,6 +149,31 @@ static int pte_check_hash32(mmu_ctx_t *ctx, target_ulong pte0,
return ret;
}
+static int ppc_hash32_pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p,
+ int ret, int rw)
+{
+ int store = 0;
+
+ /* Update page flags */
+ if (!(*pte1p & 0x00000100)) {
+ /* Update accessed flag */
+ *pte1p |= 0x00000100;
+ store = 1;
+ }
+ if (!(*pte1p & 0x00000080)) {
+ if (rw == 1 && ret == 0) {
+ /* Update changed flag */
+ *pte1p |= 0x00000080;
+ store = 1;
+ } else {
+ /* Force page fault for first write access */
+ ctx->prot &= ~PAGE_WRITE;
+ }
+ }
+
+ return store;
+}
+
/* PTE table lookup */
static int find_pte32(CPUPPCState *env, mmu_ctx_t *ctx, int h,
int rw, int type, int target_page_bits)
@@ -138,7 +228,7 @@ static int find_pte32(CPUPPCState *env, mmu_ctx_t *ctx, int h,
ctx->raddr, ctx->prot, ret);
/* Update page flags */
pte1 = ctx->raddr;
- if (pte_update_flags(ctx, &pte1, ret, rw) == 1) {
+ if (ppc_hash32_pte_update_flags(ctx, &pte1, ret, rw) == 1) {
if (env->external_htab) {
stl_p(env->external_htab + pteg_off + (good * 8) + 4,
pte1);
diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c
index 427b095..f9c5b09 100644
--- a/target-ppc/mmu-hash64.c
+++ b/target-ppc/mmu-hash64.c
@@ -226,6 +226,74 @@ target_ulong helper_load_slb_vsid(CPUPPCState *env, target_ulong rb)
#define PTE64_PTEM_MASK 0xFFFFFFFFFFFFFF80ULL
#define PTE64_CHECK_MASK (TARGET_PAGE_MASK | 0x7F)
+static int ppc_hash64_pp_check(int key, int pp, int nx)
+{
+ int access;
+
+ /* Compute access rights */
+ /* When pp is 4, 5 or 7, the result is undefined. Set it to noaccess */
+ access = 0;
+ if (key == 0) {
+ switch (pp) {
+ case 0x0:
+ case 0x1:
+ case 0x2:
+ access |= PAGE_WRITE;
+ /* No break here */
+ case 0x3:
+ case 0x6:
+ access |= PAGE_READ;
+ break;
+ }
+ } else {
+ switch (pp) {
+ case 0x0:
+ case 0x6:
+ access = 0;
+ break;
+ case 0x1:
+ case 0x3:
+ access = PAGE_READ;
+ break;
+ case 0x2:
+ access = PAGE_READ | PAGE_WRITE;
+ break;
+ }
+ }
+ if (nx == 0) {
+ access |= PAGE_EXEC;
+ }
+
+ return access;
+}
+
+static int ppc_hash64_check_prot(int prot, int rw, int access_type)
+{
+ int ret;
+
+ if (access_type == ACCESS_CODE) {
+ if (prot & PAGE_EXEC) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ } else if (rw) {
+ if (prot & PAGE_WRITE) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ } else {
+ if (prot & PAGE_READ) {
+ ret = 0;
+ } else {
+ ret = -2;
+ }
+ }
+
+ return ret;
+}
+
static inline int pte64_is_valid(target_ulong pte0)
{
return pte0 & 0x0000000000000001ULL ? 1 : 0;
@@ -257,11 +325,11 @@ static int pte64_check(mmu_ctx_t *ctx, target_ulong pte0,
}
}
/* Compute access rights */
- access = pp_check(ctx->key, pp, ctx->nx);
+ access = ppc_hash64_pp_check(ctx->key, pp, ctx->nx);
/* Keep the matching PTE informations */
ctx->raddr = pte1;
ctx->prot = access;
- ret = check_prot(ctx->prot, rw, type);
+ ret = ppc_hash64_check_prot(ctx->prot, rw, type);
if (ret == 0) {
/* Access granted */
LOG_MMU("PTE access granted !\n");
@@ -275,6 +343,31 @@ static int pte64_check(mmu_ctx_t *ctx, target_ulong pte0,
return ret;
}
+static int ppc_hash64_pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p,
+ int ret, int rw)
+{
+ int store = 0;
+
+ /* Update page flags */
+ if (!(*pte1p & 0x00000100)) {
+ /* Update accessed flag */
+ *pte1p |= 0x00000100;
+ store = 1;
+ }
+ if (!(*pte1p & 0x00000080)) {
+ if (rw == 1 && ret == 0) {
+ /* Update changed flag */
+ *pte1p |= 0x00000080;
+ store = 1;
+ } else {
+ /* Force page fault for first write access */
+ ctx->prot &= ~PAGE_WRITE;
+ }
+ }
+
+ return store;
+}
+
/* PTE table lookup */
static int find_pte64(CPUPPCState *env, mmu_ctx_t *ctx, int h,
int rw, int type, int target_page_bits)
@@ -330,7 +423,7 @@ static int find_pte64(CPUPPCState *env, mmu_ctx_t *ctx, int h,
ctx->raddr, ctx->prot, ret);
/* Update page flags */
pte1 = ctx->raddr;
- if (pte_update_flags(ctx, &pte1, ret, rw) == 1) {
+ if (ppc_hash64_pte_update_flags(ctx, &pte1, ret, rw) == 1) {
if (env->external_htab) {
stq_p(env->external_htab + pteg_off + (good * 16) + 8,
pte1);
diff --git a/target-ppc/mmu_helper.c b/target-ppc/mmu_helper.c
index 818f1b5..2deb635 100644
--- a/target-ppc/mmu_helper.c
+++ b/target-ppc/mmu_helper.c
@@ -91,12 +91,11 @@ static inline void pte_invalidate(target_ulong *pte0)
#define PTE_PTEM_MASK 0x7FFFFFBF
#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
-int pp_check(int key, int pp, int nx)
+static int pp_check(int key, int pp, int nx)
{
int access;
/* Compute access rights */
- /* When pp is 3/7, the result is undefined. Set it to noaccess */
access = 0;
if (key == 0) {
switch (pp) {
@@ -106,14 +105,12 @@ int pp_check(int key, int pp, int nx)
access |= PAGE_WRITE;
/* No break here */
case 0x3:
- case 0x6:
access |= PAGE_READ;
break;
}
} else {
switch (pp) {
case 0x0:
- case 0x6:
access = 0;
break;
case 0x1:
@@ -132,7 +129,7 @@ int pp_check(int key, int pp, int nx)
return access;
}
-int check_prot(int prot, int rw, int access_type)
+static int check_prot(int prot, int rw, int access_type)
{
int ret;
@@ -201,8 +198,8 @@ static inline int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
return ret;
}
-int pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p,
- int ret, int rw)
+static int pte_update_flags(mmu_ctx_t *ctx, target_ulong *pte1p,
+ int ret, int rw)
{
int store = 0;
generated by cgit v1.1 at 2024-11-03 04:04:56 +0000