diff options
Diffstat (limited to 'target-ppc/mmu-hash64.c')
| -rw-r--r-- | target-ppc/mmu-hash64.c | 39 |
1 files changed, 12 insertions, 27 deletions
diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c index 5607ce8dec..c76abb7d22 100644 --- a/target-ppc/mmu-hash64.c +++ b/target-ppc/mmu-hash64.c @@ -280,31 +280,6 @@ static int ppc_hash64_pte_prot(CPUPPCState *env, return prot; } -static int ppc_hash64_pte_update_flags(struct mmu_ctx_hash64 *ctx, - uint64_t *pte1p, int ret, int rw) -{ - 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; - } - } - - return store; -} - static hwaddr ppc_hash64_pteg_search(CPUPPCState *env, hwaddr pteg_off, bool secondary, target_ulong ptem, ppc_hash_pte64_t *pte) @@ -393,6 +368,7 @@ static int ppc_hash64_translate(CPUPPCState *env, struct mmu_ctx_hash64 *ctx, ppc_slb_t *slb; hwaddr pte_offset; ppc_hash_pte64_t pte; + uint64_t new_pte1; int target_page_bits; const int need_prot[] = {PAGE_READ, PAGE_WRITE, PAGE_EXEC}; @@ -440,8 +416,17 @@ static int ppc_hash64_translate(CPUPPCState *env, struct mmu_ctx_hash64 *ctx, /* 6. Update PTE referenced and changed bits if necessary */ - if (ppc_hash64_pte_update_flags(ctx, &pte.pte1, 0, rwx) == 1) { - ppc_hash64_store_hpte1(env, pte_offset, pte.pte1); + new_pte1 = pte.pte1 | HPTE64_R_R; /* set referenced bit */ + if (rwx == 1) { + new_pte1 |= HPTE64_R_C; /* set changed (dirty) bit */ + } 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; + } + + if (new_pte1 != pte.pte1) { + ppc_hash64_store_hpte1(env, pte_offset, new_pte1); } /* Keep the matching PTE informations */ |