diff options
Diffstat (limited to 'arch/powerpc/include/asm/pgtable.h')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 62 |
1 files changed, 14 insertions, 48 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h index a8805fee0df9..9835ac4173b7 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -30,72 +30,36 @@ struct mm_struct; #include <asm/tlbflush.h> /* Generic accessors to PTE bits */ -static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } +static inline int pte_write(pte_t pte) +{ return (pte_val(pte) & (_PAGE_RW | _PAGE_RO)) != _PAGE_RO; } static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } -static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } static inline int pte_none(pte_t pte) { return (pte_val(pte) & ~_PTE_NONE_MASK) == 0; } static inline pgprot_t pte_pgprot(pte_t pte) { return __pgprot(pte_val(pte) & PAGE_PROT_BITS); } #ifdef CONFIG_NUMA_BALANCING -static inline int pte_present(pte_t pte) -{ - return pte_val(pte) & _PAGE_NUMA_MASK; -} - -#define pte_present_nonuma pte_present_nonuma -static inline int pte_present_nonuma(pte_t pte) -{ - return pte_val(pte) & (_PAGE_PRESENT); -} - -#define ptep_set_numa ptep_set_numa -static inline void ptep_set_numa(struct mm_struct *mm, unsigned long addr, - pte_t *ptep) -{ - if ((pte_val(*ptep) & _PAGE_PRESENT) == 0) - VM_BUG_ON(1); - - pte_update(mm, addr, ptep, _PAGE_PRESENT, _PAGE_NUMA, 0); - return; -} - -#define pmdp_set_numa pmdp_set_numa -static inline void pmdp_set_numa(struct mm_struct *mm, unsigned long addr, - pmd_t *pmdp) -{ - if ((pmd_val(*pmdp) & _PAGE_PRESENT) == 0) - VM_BUG_ON(1); - - pmd_hugepage_update(mm, addr, pmdp, _PAGE_PRESENT, _PAGE_NUMA); - return; -} - /* - * Generic NUMA pte helpers expect pteval_t and pmdval_t types to exist - * which was inherited from x86. For the purposes of powerpc pte_basic_t and - * pmd_t are equivalent + * These work without NUMA balancing but the kernel does not care. See the + * comment in include/asm-generic/pgtable.h . On powerpc, this will only + * work for user pages and always return true for kernel pages. */ -#define pteval_t pte_basic_t -#define pmdval_t pmd_t -static inline pteval_t ptenuma_flags(pte_t pte) +static inline int pte_protnone(pte_t pte) { - return pte_val(pte) & _PAGE_NUMA_MASK; + return (pte_val(pte) & + (_PAGE_PRESENT | _PAGE_USER)) == _PAGE_PRESENT; } -static inline pmdval_t pmdnuma_flags(pmd_t pmd) +static inline int pmd_protnone(pmd_t pmd) { - return pmd_val(pmd) & _PAGE_NUMA_MASK; + return pte_protnone(pmd_pte(pmd)); } - -# else +#endif /* CONFIG_NUMA_BALANCING */ static inline int pte_present(pte_t pte) { return pte_val(pte) & _PAGE_PRESENT; } -#endif /* CONFIG_NUMA_BALANCING */ /* Conversion functions: convert a page and protection to a page entry, * and a page entry and page directory to the page they refer to. @@ -115,12 +79,14 @@ static inline unsigned long pte_pfn(pte_t pte) { /* Generic modifiers for PTE bits */ static inline pte_t pte_wrprotect(pte_t pte) { - pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; } + pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); + pte_val(pte) |= _PAGE_RO; return pte; } static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; } static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; } static inline pte_t pte_mkwrite(pte_t pte) { + pte_val(pte) &= ~_PAGE_RO; pte_val(pte) |= _PAGE_RW; return pte; } static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; } |