diff options
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/hash_native_64.c | 53 |
1 files changed, 22 insertions, 31 deletions
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c index 14e3fe896baf..bb920ee15627 100644 --- a/arch/powerpc/mm/hash_native_64.c +++ b/arch/powerpc/mm/hash_native_64.c @@ -245,19 +245,10 @@ static long native_hpte_remove(unsigned long hpte_group) return i; } -static inline int hpte_actual_psize(struct hash_pte *hptep, int psize) +static inline int __hpte_actual_psize(unsigned int lp, int psize) { int i, shift; unsigned int mask; - /* Look at the 8 bit LP value */ - unsigned int lp = (hptep->r >> LP_SHIFT) & ((1 << LP_BITS) - 1); - - if (!(hptep->v & HPTE_V_VALID)) - return -1; - - /* First check if it is large page */ - if (!(hptep->v & HPTE_V_LARGE)) - return MMU_PAGE_4K; /* start from 1 ignoring MMU_PAGE_4K */ for (i = 1; i < MMU_PAGE_COUNT; i++) { @@ -284,6 +275,21 @@ static inline int hpte_actual_psize(struct hash_pte *hptep, int psize) return -1; } +static inline int hpte_actual_psize(struct hash_pte *hptep, int psize) +{ + /* Look at the 8 bit LP value */ + unsigned int lp = (hptep->r >> LP_SHIFT) & ((1 << LP_BITS) - 1); + + if (!(hptep->v & HPTE_V_VALID)) + return -1; + + /* First check if it is large page */ + if (!(hptep->v & HPTE_V_LARGE)) + return MMU_PAGE_4K; + + return __hpte_actual_psize(lp, psize); +} + static long native_hpte_updatepp(unsigned long slot, unsigned long newpp, unsigned long vpn, int psize, int ssize, int local) @@ -425,42 +431,27 @@ static void hpte_decode(struct hash_pte *hpte, unsigned long slot, int *psize, int *apsize, int *ssize, unsigned long *vpn) { unsigned long avpn, pteg, vpi; - unsigned long hpte_r = hpte->r; unsigned long hpte_v = hpte->v; unsigned long vsid, seg_off; - int i, size, a_size, shift, penc; + int size, a_size, shift; + /* Look at the 8 bit LP value */ + unsigned int lp = (hpte->r >> LP_SHIFT) & ((1 << LP_BITS) - 1); if (!(hpte_v & HPTE_V_LARGE)) { size = MMU_PAGE_4K; a_size = MMU_PAGE_4K; } else { - for (i = 0; i < LP_BITS; i++) { - if ((hpte_r & LP_MASK(i+1)) == LP_MASK(i+1)) - break; - } - penc = LP_MASK(i+1) >> LP_SHIFT; for (size = 0; size < MMU_PAGE_COUNT; size++) { /* valid entries have a shift value */ if (!mmu_psize_defs[size].shift) continue; - for (a_size = 0; a_size < MMU_PAGE_COUNT; a_size++) { - - /* 4K pages are not represented by LP */ - if (a_size == MMU_PAGE_4K) - continue; - /* valid entries have a shift value */ - if (!mmu_psize_defs[a_size].shift) - continue; - - if (penc == mmu_psize_defs[size].penc[a_size]) - goto out; - } + a_size = __hpte_actual_psize(lp, size); + if (a_size != -1) + break; } } - -out: /* This works for all page sizes, and for 256M and 1T segments */ *ssize = hpte_v >> HPTE_V_SSIZE_SHIFT; shift = mmu_psize_defs[size].shift; |