diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/pgtable.h | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index 3a53d495874b..8ee9dce10b83 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -276,6 +276,29 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, extern struct page *empty_zero_page; #define ZERO_PAGE(vaddr) (empty_zero_page) + +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +/* to find an entry in a page-table-directory */ +#define pgd_index(addr) ((addr) >> PGDIR_SHIFT) + +#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) + +/* to find an entry in a kernel page-table-directory */ +#define pgd_offset_k(addr) pgd_offset(&init_mm, addr) + +/* + * The "pgd_xxx()" functions here are trivial for a folded two-level + * setup: the pgd is never bad, and a pmd always exists (as it's folded + * into the pgd entry) + */ +#define pgd_none(pgd) (0) +#define pgd_bad(pgd) (0) +#define pgd_present(pgd) (1) +#define pgd_clear(pgdp) do { } while (0) +#define set_pgd(pgd,pgdp) do { } while (0) + + #define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) #define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) @@ -382,25 +405,6 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd) */ #define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot) -/* - * The "pgd_xxx()" functions here are trivial for a folded two-level - * setup: the pgd is never bad, and a pmd always exists (as it's folded - * into the pgd entry) - */ -#define pgd_none(pgd) (0) -#define pgd_bad(pgd) (0) -#define pgd_present(pgd) (1) -#define pgd_clear(pgdp) do { } while (0) -#define set_pgd(pgd,pgdp) do { } while (0) - -/* to find an entry in a page-table-directory */ -#define pgd_index(addr) ((addr) >> PGDIR_SHIFT) - -#define pgd_offset(mm, addr) ((mm)->pgd+pgd_index(addr)) - -/* to find an entry in a kernel page-table-directory */ -#define pgd_offset_k(addr) pgd_offset(&init_mm, addr) - /* Find an entry in the second-level page table.. */ #define pmd_offset(dir, addr) ((pmd_t *)(dir)) @@ -414,8 +418,6 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) return pte; } -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; - /* * Encode and decode a swap entry. Swap entries are stored in the Linux * page tables as follows: |