diff options
Diffstat (limited to 'target-ppc/mmu-hash64.c')
| -rw-r--r-- | target-ppc/mmu-hash64.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/target-ppc/mmu-hash64.c b/target-ppc/mmu-hash64.c index b0278c95e1..971751f7de 100644 --- a/target-ppc/mmu-hash64.c +++ b/target-ppc/mmu-hash64.c @@ -388,6 +388,24 @@ static hwaddr ppc_hash64_pteg_search(CPUPPCState *env, hwaddr hash, return -1; } +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 epnshift; +} + static hwaddr ppc_hash64_htab_lookup(CPUPPCState *env, ppc_slb_t *slb, target_ulong eaddr, ppc_hash_pte64_t *pte) @@ -396,12 +414,7 @@ static hwaddr ppc_hash64_htab_lookup(CPUPPCState *env, hwaddr hash; uint64_t vsid, epnshift, epnmask, epn, ptem; - /* 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 */ - epnshift = (slb->vsid & SLB_VSID_L) - ? TARGET_PAGE_BITS_16M : TARGET_PAGE_BITS; + epnshift = ppc_hash64_page_shift(slb); epnmask = ~((1ULL << epnshift) - 1); if (slb->vsid & SLB_VSID_B) { @@ -448,12 +461,14 @@ static hwaddr ppc_hash64_htab_lookup(CPUPPCState *env, 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; - /* FIXME: Add support for SLLP extended page sizes */ - int target_page_bits = (slb->vsid & SLB_VSID_L) - ? TARGET_PAGE_BITS_16M : TARGET_PAGE_BITS; - hwaddr mask = (1ULL << target_page_bits) - 1; - + /* + * 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); } |