diff options
Diffstat (limited to 'include/asm-powerpc/pgtable-64k.h')
-rw-r--r-- | include/asm-powerpc/pgtable-64k.h | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/include/asm-powerpc/pgtable-64k.h b/include/asm-powerpc/pgtable-64k.h index 1cbd6b377ee..07b0d8f09cb 100644 --- a/include/asm-powerpc/pgtable-64k.h +++ b/include/asm-powerpc/pgtable-64k.h @@ -70,11 +70,27 @@ static inline struct subpage_prot_table *pgd_subpage_prot(pgd_t *pgd) #define PGDIR_MASK (~(PGDIR_SIZE-1)) /* Additional PTE bits (don't change without checking asm in hash_low.S) */ +#define __HAVE_ARCH_PTE_SPECIAL +#define _PAGE_SPECIAL 0x00000400 /* software: special page */ #define _PAGE_HPTE_SUB 0x0ffff000 /* combo only: sub pages HPTE bits */ #define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */ #define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */ #define _PAGE_4K_PFN 0x20000000 /* PFN is for a single 4k page */ +/* For 64K page, we don't have a separate _PAGE_HASHPTE bit. Instead, + * we set that to be the whole sub-bits mask. The C code will only + * test this, so a multi-bit mask will work. For combo pages, this + * is equivalent as effectively, the old _PAGE_HASHPTE was an OR of + * all the sub bits. For real 64k pages, we now have the assembly set + * _PAGE_HPTE_SUB0 in addition to setting the HIDX bits which overlap + * that mask. This is fine as long as the HIDX bits are never set on + * a PTE that isn't hashed, which is the case today. + * + * A little nit is for the huge page C code, which does the hashing + * in C, we need to provide which bit to use. + */ +#define _PAGE_HASHPTE _PAGE_HPTE_SUB + /* Note the full page bits must be in the same location as for normal * 4k pages as the same asssembly will be used to insert 64K pages * wether the kernel has CONFIG_PPC_64K_PAGES or not @@ -83,8 +99,7 @@ static inline struct subpage_prot_table *pgd_subpage_prot(pgd_t *pgd) #define _PAGE_F_GIX 0x00007000 /* full page: hidx bits */ /* PTE flags to conserve for HPTE identification */ -#define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | _PAGE_HPTE_SUB |\ - _PAGE_COMBO) +#define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | _PAGE_COMBO) /* Shift to put page number into pte. * @@ -125,7 +140,7 @@ static inline struct subpage_prot_table *pgd_subpage_prot(pgd_t *pgd) unsigned __split = (psize == MMU_PAGE_4K || \ psize == MMU_PAGE_64K_AP); \ shift = mmu_psize_defs[psize].shift; \ - for (index = 0; va < __end; index++, va += (1 << shift)) { \ + for (index = 0; va < __end; index++, va += (1L << shift)) { \ if (!__split || __rpte_sub_valid(rpte, index)) do { \ #define pte_iterate_hashed_end() } while(0); } } while(0) |