* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cpu.h"
-#include "helper.h"
+#include "exec/helper-proto.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "mmu-hash64.h"
//#define DEBUG_SLB
#ifdef DEBUG_MMU
-# define LOG_MMU(...) qemu_log(__VA_ARGS__)
-# define LOG_MMU_STATE(env) log_cpu_state((env), 0)
+# define LOG_MMU_STATE(cpu) log_cpu_state((cpu), 0)
#else
-# define LOG_MMU(...) do { } while (0)
-# define LOG_MMU_STATE(...) do { } while (0)
+# define LOG_MMU_STATE(cpu) do { } while (0)
#endif
#ifdef DEBUG_SLB
# define LOG_SLB(...) do { } while (0)
#endif
-struct mmu_ctx_hash64 {
- hwaddr raddr; /* Real address */
- int prot; /* Protection bits */
- hwaddr hash[2]; /* Pagetable hash values */
- target_ulong ptem; /* Virtual segment ID | API */
- int key; /* Access key */
-};
-
+/*
+ * Used to indicate whether we have allocated htab in the
+ * host kernel
+ */
+bool kvmppc_kern_htab;
/*
* SLB handling
*/
int i;
uint64_t slbe, slbv;
- cpu_synchronize_state(env);
+ cpu_synchronize_state(CPU(ppc_env_get_cpu(env)));
cpu_fprintf(f, "SLB\tESID\t\t\tVSID\n");
for (i = 0; i < env->slb_nr; i++) {
void helper_slbia(CPUPPCState *env)
{
+ PowerPCCPU *cpu = ppc_env_get_cpu(env);
int n, do_invalidate;
do_invalidate = 0;
}
}
if (do_invalidate) {
- tlb_flush(env, 1);
+ tlb_flush(CPU(cpu), 1);
}
}
void helper_slbie(CPUPPCState *env, target_ulong addr)
{
+ PowerPCCPU *cpu = ppc_env_get_cpu(env);
ppc_slb_t *slb;
slb = slb_lookup(env, addr);
* and we still don't have a tlb_flush_mask(env, n, mask)
* in QEMU, we just invalidate all TLBs
*/
- tlb_flush(env, 1);
+ tlb_flush(CPU(cpu), 1);
}
}
* 64-bit hash table MMU handling
*/
-#define PTE64_CHECK_MASK (TARGET_PAGE_MASK | 0x7F)
-
-static int ppc_hash64_pp_check(int key, int pp, bool nx)
+static int ppc_hash64_pte_prot(CPUPPCState *env,
+ ppc_slb_t *slb, ppc_hash_pte64_t pte)
{
- int access;
+ unsigned pp, key;
+ /* Some pp bit combinations have undefined behaviour, so default
+ * to no access in those cases */
+ int prot = 0;
+
+ key = !!(msr_pr ? (slb->vsid & SLB_VSID_KP)
+ : (slb->vsid & SLB_VSID_KS));
+ pp = (pte.pte1 & HPTE64_R_PP) | ((pte.pte1 & HPTE64_R_PP0) >> 61);
- /* 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 */
+ prot = PAGE_READ | PAGE_WRITE;
+ break;
+
case 0x3:
case 0x6:
- access |= PAGE_READ;
+ prot = PAGE_READ;
break;
}
} else {
switch (pp) {
case 0x0:
case 0x6:
- access = 0;
+ prot = 0;
break;
+
case 0x1:
case 0x3:
- access = PAGE_READ;
+ prot = PAGE_READ;
break;
+
case 0x2:
- access = PAGE_READ | PAGE_WRITE;
+ prot = PAGE_READ | PAGE_WRITE;
break;
}
}
- if (!nx) {
- access |= PAGE_EXEC;
+
+ /* No execute if either noexec or guarded bits set */
+ if (!(pte.pte1 & HPTE64_R_N) || (pte.pte1 & HPTE64_R_G)
+ || (slb->vsid & SLB_VSID_N)) {
+ prot |= PAGE_EXEC;
}
- return access;
+ return prot;
}
-static int ppc_hash64_check_prot(int prot, int rwx)
+static int ppc_hash64_amr_prot(CPUPPCState *env, ppc_hash_pte64_t pte)
{
- int ret;
+ int key, amrbits;
+ int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
- if (rwx == 2) {
- if (prot & PAGE_EXEC) {
- ret = 0;
- } else {
- ret = -2;
- }
- } else if (rwx == 1) {
- if (prot & PAGE_WRITE) {
- ret = 0;
- } else {
- ret = -2;
- }
- } else {
- if (prot & PAGE_READ) {
- ret = 0;
- } else {
- ret = -2;
- }
+
+ /* Only recent MMUs implement Virtual Page Class Key Protection */
+ if (!(env->mmu_model & POWERPC_MMU_AMR)) {
+ return prot;
}
- return ret;
-}
+ key = HPTE64_R_KEY(pte.pte1);
+ amrbits = (env->spr[SPR_AMR] >> 2*(31 - key)) & 0x3;
-static int pte64_check(struct mmu_ctx_hash64 *ctx, target_ulong pte0,
- target_ulong pte1, int h, int rwx)
-{
- target_ulong mmask;
- int access, ret, pp;
-
- ret = -1;
- /* Check validity and table match */
- if ((pte0 & HPTE64_V_VALID) && (h == !!(pte0 & HPTE64_V_SECONDARY))) {
- bool nx;
-
- /* Check vsid & api */
- mmask = PTE64_CHECK_MASK;
- pp = (pte1 & HPTE64_R_PP) | ((pte1 & HPTE64_R_PP0) >> 61);
- /* No execute if either noexec or guarded bits set */
- nx = (pte1 & HPTE64_R_N) || (pte1 & HPTE64_R_G);
- if (HPTE64_V_COMPARE(pte0, ctx->ptem)) {
- if (ctx->raddr != (hwaddr)-1ULL) {
- /* all matches should have equal RPN, WIMG & PP */
- if ((ctx->raddr & mmask) != (pte1 & mmask)) {
- qemu_log("Bad RPN/WIMG/PP\n");
- return -3;
- }
- }
- /* Compute access rights */
- access = ppc_hash64_pp_check(ctx->key, pp, nx);
- /* Keep the matching PTE informations */
- ctx->raddr = pte1;
- ctx->prot = access;
- ret = ppc_hash64_check_prot(ctx->prot, rwx);
- if (ret == 0) {
- /* Access granted */
- LOG_MMU("PTE access granted !\n");
- } else {
- /* Access right violation */
- LOG_MMU("PTE access rejected\n");
- }
- }
+ /* fprintf(stderr, "AMR protection: key=%d AMR=0x%" PRIx64 "\n", key, */
+ /* env->spr[SPR_AMR]); */
+
+ /*
+ * A store is permitted if the AMR bit is 0. Remove write
+ * protection if it is set.
+ */
+ if (amrbits & 0x2) {
+ prot &= ~PAGE_WRITE;
+ }
+ /*
+ * A load is permitted if the AMR bit is 0. Remove read
+ * protection if it is set.
+ */
+ if (amrbits & 0x1) {
+ prot &= ~PAGE_READ;
}
- return ret;
+ return prot;
}
-static int ppc_hash64_pte_update_flags(struct mmu_ctx_hash64 *ctx,
- target_ulong *pte1p,
- int ret, int rw)
+uint64_t ppc_hash64_start_access(PowerPCCPU *cpu, target_ulong pte_index)
{
- int store = 0;
-
- /* Update page flags */
- if (!(*pte1p & HPTE64_R_R)) {
- /* Update accessed flag */
- *pte1p |= HPTE64_R_R;
- store = 1;
- }
- if (!(*pte1p & HPTE64_R_C)) {
- if (rw == 1 && ret == 0) {
- /* Update changed flag */
- *pte1p |= HPTE64_R_C;
- store = 1;
- } else {
- /* Force page fault for first write access */
- ctx->prot &= ~PAGE_WRITE;
+ uint64_t token = 0;
+ hwaddr pte_offset;
+
+ pte_offset = pte_index * HASH_PTE_SIZE_64;
+ if (kvmppc_kern_htab) {
+ /*
+ * HTAB is controlled by KVM. Fetch the PTEG into a new buffer.
+ */
+ token = kvmppc_hash64_read_pteg(cpu, pte_index);
+ if (token) {
+ return token;
}
+ /*
+ * pteg read failed, even though we have allocated htab via
+ * kvmppc_reset_htab.
+ */
+ return 0;
}
+ /*
+ * HTAB is controlled by QEMU. Just point to the internally
+ * accessible PTEG.
+ */
+ if (cpu->env.external_htab) {
+ token = (uint64_t)(uintptr_t) cpu->env.external_htab + pte_offset;
+ } else if (cpu->env.htab_base) {
+ token = cpu->env.htab_base + pte_offset;
+ }
+ return token;
+}
- return store;
+void ppc_hash64_stop_access(uint64_t token)
+{
+ if (kvmppc_kern_htab) {
+ kvmppc_hash64_free_pteg(token);
+ }
}
-/* PTE table lookup */
-static int find_pte64(CPUPPCState *env, struct mmu_ctx_hash64 *ctx,
- target_ulong eaddr, int h, int rwx, int target_page_bits)
+static hwaddr ppc_hash64_pteg_search(CPUPPCState *env, hwaddr hash,
+ bool secondary, target_ulong ptem,
+ ppc_hash_pte64_t *pte)
{
- hwaddr pteg_off;
+ int i;
+ uint64_t token;
target_ulong pte0, pte1;
- int i, good = -1;
- int ret, r;
+ target_ulong pte_index;
- ret = -1; /* No entry found */
- pteg_off = (ctx->hash[h] * HASH_PTEG_SIZE_64) & env->htab_mask;
- for (i = 0; i < HPTES_PER_GROUP; i++) {
- pte0 = ppc_hash64_load_hpte0(env, pteg_off + i*HASH_PTE_SIZE_64);
- pte1 = ppc_hash64_load_hpte1(env, pteg_off + i*HASH_PTE_SIZE_64);
-
- r = pte64_check(ctx, pte0, pte1, h, rwx);
- LOG_MMU("Load pte from %016" HWADDR_PRIx " => " TARGET_FMT_lx " "
- TARGET_FMT_lx " %d %d %d " TARGET_FMT_lx "\n",
- pteg_off + (i * 16), pte0, pte1, (int)(pte0 & 1), h,
- (int)((pte0 >> 1) & 1), ctx->ptem);
- switch (r) {
- case -3:
- /* PTE inconsistency */
- return -1;
- case -2:
- /* Access violation */
- ret = -2;
- good = i;
- break;
- case -1:
- default:
- /* No PTE match */
- break;
- case 0:
- /* access granted */
- /* XXX: we should go on looping to check all PTEs consistency
- * but if we can speed-up the whole thing as the
- * result would be undefined if PTEs are not consistent.
- */
- ret = 0;
- good = i;
- goto done;
- }
+ pte_index = (hash & env->htab_mask) * HPTES_PER_GROUP;
+ token = ppc_hash64_start_access(ppc_env_get_cpu(env), pte_index);
+ if (!token) {
+ return -1;
}
- if (good != -1) {
- done:
- LOG_MMU("found PTE at addr %08" HWADDR_PRIx " prot=%01x ret=%d\n",
- ctx->raddr, ctx->prot, ret);
- /* Update page flags */
- pte1 = ctx->raddr;
- if (ppc_hash64_pte_update_flags(ctx, &pte1, ret, rwx) == 1) {
- ppc_hash64_store_hpte1(env, pteg_off + good * HASH_PTE_SIZE_64, pte1);
+ for (i = 0; i < HPTES_PER_GROUP; i++) {
+ pte0 = ppc_hash64_load_hpte0(env, token, i);
+ pte1 = ppc_hash64_load_hpte1(env, token, i);
+
+ if ((pte0 & HPTE64_V_VALID)
+ && (secondary == !!(pte0 & HPTE64_V_SECONDARY))
+ && HPTE64_V_COMPARE(pte0, ptem)) {
+ pte->pte0 = pte0;
+ pte->pte1 = pte1;
+ ppc_hash64_stop_access(token);
+ return (pte_index + i) * HASH_PTE_SIZE_64;
}
}
+ ppc_hash64_stop_access(token);
+ /*
+ * We didn't find a valid entry.
+ */
+ return -1;
+}
- /* We have a TLB that saves 4K pages, so let's
- * split a huge page to 4k chunks */
- if (target_page_bits != TARGET_PAGE_BITS) {
- ctx->raddr |= (eaddr & ((1 << target_page_bits) - 1))
- & TARGET_PAGE_MASK;
+static uint64_t ppc_hash64_page_shift(ppc_slb_t *slb)
+{
+ uint64_t epnshift;
+
+ /* Page size according to the SLB, which we use to generate the
+ * EPN for hash table lookup.. When we implement more recent MMU
+ * extensions this might be different from the actual page size
+ * encoded in the PTE */
+ if ((slb->vsid & SLB_VSID_LLP_MASK) == SLB_VSID_4K) {
+ epnshift = TARGET_PAGE_BITS;
+ } else if ((slb->vsid & SLB_VSID_LLP_MASK) == SLB_VSID_64K) {
+ epnshift = TARGET_PAGE_BITS_64K;
+ } else {
+ epnshift = TARGET_PAGE_BITS_16M;
}
- return ret;
+ return epnshift;
}
-static int ppc_hash64_translate(CPUPPCState *env, struct mmu_ctx_hash64 *ctx,
- target_ulong eaddr, int rwx)
+static hwaddr ppc_hash64_htab_lookup(CPUPPCState *env,
+ ppc_slb_t *slb, target_ulong eaddr,
+ ppc_hash_pte64_t *pte)
{
+ hwaddr pte_offset;
hwaddr hash;
- target_ulong vsid;
- int pr, target_page_bits;
- int ret, ret2;
+ uint64_t vsid, epnshift, epnmask, epn, ptem;
+
+ epnshift = ppc_hash64_page_shift(slb);
+ epnmask = ~((1ULL << epnshift) - 1);
+
+ if (slb->vsid & SLB_VSID_B) {
+ /* 1TB segment */
+ vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT_1T;
+ epn = (eaddr & ~SEGMENT_MASK_1T) & epnmask;
+ hash = vsid ^ (vsid << 25) ^ (epn >> epnshift);
+ } else {
+ /* 256M segment */
+ vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT;
+ epn = (eaddr & ~SEGMENT_MASK_256M) & epnmask;
+ hash = vsid ^ (epn >> epnshift);
+ }
+ ptem = (slb->vsid & SLB_VSID_PTEM) | ((epn >> 16) & HPTE64_V_AVPN);
+
+ /* Page address translation */
+ qemu_log_mask(CPU_LOG_MMU,
+ "htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx
+ " hash " TARGET_FMT_plx "\n",
+ env->htab_base, env->htab_mask, hash);
+
+ /* Primary PTEG lookup */
+ qemu_log_mask(CPU_LOG_MMU,
+ "0 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx
+ " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx
+ " hash=" TARGET_FMT_plx "\n",
+ env->htab_base, env->htab_mask, vsid, ptem, hash);
+ pte_offset = ppc_hash64_pteg_search(env, hash, 0, ptem, pte);
+
+ if (pte_offset == -1) {
+ /* Secondary PTEG lookup */
+ qemu_log_mask(CPU_LOG_MMU,
+ "1 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx
+ " vsid=" TARGET_FMT_lx " api=" TARGET_FMT_lx
+ " hash=" TARGET_FMT_plx "\n", env->htab_base,
+ env->htab_mask, vsid, ptem, ~hash);
+
+ pte_offset = ppc_hash64_pteg_search(env, ~hash, 1, ptem, pte);
+ }
+
+ return pte_offset;
+}
+
+static hwaddr ppc_hash64_pte_raddr(ppc_slb_t *slb, ppc_hash_pte64_t pte,
+ target_ulong eaddr)
+{
+ hwaddr mask;
+ int target_page_bits;
+ hwaddr rpn = pte.pte1 & HPTE64_R_RPN;
+ /*
+ * We support 4K, 64K and 16M now
+ */
+ target_page_bits = ppc_hash64_page_shift(slb);
+ mask = (1ULL << target_page_bits) - 1;
+ return (rpn & ~mask) | (eaddr & mask);
+}
+
+int ppc_hash64_handle_mmu_fault(PowerPCCPU *cpu, target_ulong eaddr,
+ int rwx, int mmu_idx)
+{
+ CPUState *cs = CPU(cpu);
+ CPUPPCState *env = &cpu->env;
ppc_slb_t *slb;
- target_ulong pageaddr;
- int segment_bits;
+ hwaddr pte_offset;
+ ppc_hash_pte64_t pte;
+ int pp_prot, amr_prot, prot;
+ uint64_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 */
/* In real mode the top 4 effective address bits are ignored */
- ctx->raddr = eaddr & 0x0FFFFFFFFFFFFFFFULL;
- ctx->prot = PAGE_READ | PAGE_EXEC | PAGE_WRITE;
+ raddr = eaddr & 0x0FFFFFFFFFFFFFFFULL;
+ tlb_set_page(cs, eaddr & TARGET_PAGE_MASK, raddr & TARGET_PAGE_MASK,
+ PAGE_READ | PAGE_WRITE | PAGE_EXEC, mmu_idx,
+ TARGET_PAGE_SIZE);
return 0;
}
- pr = msr_pr;
-
- LOG_MMU("Check SLBs\n");
+ /* 2. Translation is on, so look up the SLB */
slb = slb_lookup(env, eaddr);
+
if (!slb) {
- return -5;
+ if (rwx == 2) {
+ cs->exception_index = POWERPC_EXCP_ISEG;
+ env->error_code = 0;
+ } else {
+ cs->exception_index = POWERPC_EXCP_DSEG;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ }
+ return 1;
}
- if (slb->vsid & SLB_VSID_B) {
- vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT_1T;
- segment_bits = 40;
- } else {
- vsid = (slb->vsid & SLB_VSID_VSID) >> SLB_VSID_SHIFT;
- segment_bits = 28;
+ /* 3. Check for segment level no-execute violation */
+ if ((rwx == 2) && (slb->vsid & SLB_VSID_N)) {
+ cs->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x10000000;
+ return 1;
}
- target_page_bits = (slb->vsid & SLB_VSID_L)
- ? TARGET_PAGE_BITS_16M : TARGET_PAGE_BITS;
- ctx->key = !!(pr ? (slb->vsid & SLB_VSID_KP)
- : (slb->vsid & SLB_VSID_KS));
+ /* 4. Locate the PTE in the hash table */
+ pte_offset = ppc_hash64_htab_lookup(env, slb, eaddr, &pte);
+ if (pte_offset == -1) {
+ if (rwx == 2) {
+ cs->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x40000000;
+ } else {
+ cs->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;
+ }
+ qemu_log_mask(CPU_LOG_MMU,
+ "found PTE at offset %08" HWADDR_PRIx "\n", pte_offset);
- pageaddr = eaddr & ((1ULL << segment_bits)
- - (1ULL << target_page_bits));
- if (slb->vsid & SLB_VSID_B) {
- hash = vsid ^ (vsid << 25) ^ (pageaddr >> target_page_bits);
- } else {
- hash = vsid ^ (pageaddr >> target_page_bits);
- }
- /* Only 5 bits of the page index are used in the AVPN */
- ctx->ptem = (slb->vsid & SLB_VSID_PTEM) |
- ((pageaddr >> 16) & ((1ULL << segment_bits) - 0x80));
-
- LOG_MMU("pte segment: key=%d nx %d vsid " TARGET_FMT_lx "\n",
- ctx->key, !!(slb->vsid & SLB_VSID_N), vsid);
- ret = -1;
-
- /* Check if instruction fetch is allowed, if needed */
- if (rwx != 2 || !(slb->vsid & SLB_VSID_N)) {
- /* Page address translation */
- LOG_MMU("htab_base " TARGET_FMT_plx " htab_mask " TARGET_FMT_plx
- " hash " TARGET_FMT_plx "\n",
- env->htab_base, env->htab_mask, hash);
- ctx->hash[0] = hash;
- ctx->hash[1] = ~hash;
-
- /* Initialize real address with an invalid value */
- ctx->raddr = (hwaddr)-1ULL;
- LOG_MMU("0 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx
- " vsid=" TARGET_FMT_lx " ptem=" TARGET_FMT_lx
- " hash=" TARGET_FMT_plx "\n",
- env->htab_base, env->htab_mask, vsid, ctx->ptem,
- ctx->hash[0]);
- /* Primary table lookup */
- ret = find_pte64(env, ctx, eaddr, 0, rwx, target_page_bits);
- if (ret < 0) {
- /* Secondary table lookup */
- LOG_MMU("1 htab=" TARGET_FMT_plx "/" TARGET_FMT_plx
- " vsid=" TARGET_FMT_lx " api=" TARGET_FMT_lx
- " hash=" TARGET_FMT_plx "\n", env->htab_base,
- env->htab_mask, vsid, ctx->ptem, ctx->hash[1]);
- ret2 = find_pte64(env, ctx, eaddr, 1, rwx, target_page_bits);
- if (ret2 != -1) {
- ret = ret2;
+ /* 5. Check access permissions */
+
+ pp_prot = ppc_hash64_pte_prot(env, slb, pte);
+ amr_prot = ppc_hash64_amr_prot(env, pte);
+ prot = pp_prot & amr_prot;
+
+ if ((need_prot[rwx] & ~prot) != 0) {
+ /* Access right violation */
+ qemu_log_mask(CPU_LOG_MMU, "PTE access rejected\n");
+ if (rwx == 2) {
+ cs->exception_index = POWERPC_EXCP_ISI;
+ env->error_code = 0x08000000;
+ } else {
+ target_ulong dsisr = 0;
+
+ cs->exception_index = POWERPC_EXCP_DSI;
+ env->error_code = 0;
+ env->spr[SPR_DAR] = eaddr;
+ if (need_prot[rwx] & ~pp_prot) {
+ dsisr |= 0x08000000;
}
+ if (rwx == 1) {
+ dsisr |= 0x02000000;
+ }
+ if (need_prot[rwx] & ~amr_prot) {
+ dsisr |= 0x00200000;
+ }
+ env->spr[SPR_DSISR] = dsisr;
}
+ return 1;
+ }
+
+ qemu_log_mask(CPU_LOG_MMU, "PTE access granted !\n");
+
+ /* 6. Update PTE referenced and changed bits if necessary */
+
+ new_pte1 = pte.pte1 | HPTE64_R_R; /* set referenced bit */
+ if (rwx == 1) {
+ new_pte1 |= HPTE64_R_C; /* set changed (dirty) bit */
} else {
- LOG_MMU("No access allowed\n");
- ret = -3;
+ /* Treat the page as read-only for now, so that a later write
+ * will pass through this function again to set the C bit */
+ prot &= ~PAGE_WRITE;
}
- return ret;
+ if (new_pte1 != pte.pte1) {
+ ppc_hash64_store_hpte(env, pte_offset / HASH_PTE_SIZE_64,
+ pte.pte0, new_pte1);
+ }
+
+ /* 7. Determine the real address from the PTE */
+
+ raddr = ppc_hash64_pte_raddr(slb, pte, eaddr);
+
+ tlb_set_page(cs, eaddr & TARGET_PAGE_MASK, raddr & TARGET_PAGE_MASK,
+ prot, mmu_idx, TARGET_PAGE_SIZE);
+
+ return 0;
}
hwaddr ppc_hash64_get_phys_page_debug(CPUPPCState *env, target_ulong addr)
{
- struct mmu_ctx_hash64 ctx;
+ ppc_slb_t *slb;
+ hwaddr pte_offset;
+ ppc_hash_pte64_t pte;
+
+ if (msr_dr == 0) {
+ /* In real mode the top 4 effective address bits are ignored */
+ return addr & 0x0FFFFFFFFFFFFFFFULL;
+ }
+
+ slb = slb_lookup(env, addr);
+ if (!slb) {
+ return -1;
+ }
- if (unlikely(ppc_hash64_translate(env, &ctx, addr, 0) != 0)) {
+ pte_offset = ppc_hash64_htab_lookup(env, slb, addr, &pte);
+ if (pte_offset == -1) {
return -1;
}
- return ctx.raddr & TARGET_PAGE_MASK;
+ return ppc_hash64_pte_raddr(slb, pte, addr) & TARGET_PAGE_MASK;
}
-int ppc_hash64_handle_mmu_fault(CPUPPCState *env, target_ulong address, int rwx,
- int mmu_idx)
+void ppc_hash64_store_hpte(CPUPPCState *env,
+ target_ulong pte_index,
+ target_ulong pte0, target_ulong pte1)
{
- struct mmu_ctx_hash64 ctx;
- int ret = 0;
-
- ret = ppc_hash64_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:
- 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 (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 -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;
+ CPUState *cs = CPU(ppc_env_get_cpu(env));
+
+ if (kvmppc_kern_htab) {
+ kvmppc_hash64_write_pte(env, pte_index, pte0, pte1);
+ return;
}
- return ret;
+ pte_index *= HASH_PTE_SIZE_64;
+ if (env->external_htab) {
+ stq_p(env->external_htab + pte_index, pte0);
+ stq_p(env->external_htab + pte_index + HASH_PTE_SIZE_64/2, pte1);
+ } else {
+ stq_phys(cs->as, env->htab_base + pte_index, pte0);
+ stq_phys(cs->as, env->htab_base + pte_index + HASH_PTE_SIZE_64/2, pte1);
+ }
}
projects / mirror_qemu.git / blobdiff