projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f5df8e26 JH |
1 | #ifndef _METAG_PGALLOC_H |
| 2 | #define _METAG_PGALLOC_H | |
| 3 | ||
| 4 | #include <linux/threads.h> | |
| 5 | #include <linux/mm.h> | |
| 6 | ||
| 7 | #define pmd_populate_kernel(mm, pmd, pte) \ | |
| 8 | set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) | |
| 9 | ||
| 10 | #define pmd_populate(mm, pmd, pte) \ | |
| 11 | set_pmd(pmd, __pmd(_PAGE_TABLE | page_to_phys(pte))) | |
| 12 | ||
| 13 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
| 14 | ||
| 15 | /* | |
| 16 | * Allocate and free page tables. | |
| 17 | */ | |
| 18 | #ifdef CONFIG_METAG_META21_MMU | |
| 19 | static inline void pgd_ctor(pgd_t *pgd) | |
| 20 | { | |
| 21 | memcpy(pgd + USER_PTRS_PER_PGD, | |
| 22 | swapper_pg_dir + USER_PTRS_PER_PGD, | |
| 23 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
| 24 | } | |
| 25 | #else | |
| 26 | #define pgd_ctor(x) do { } while (0) | |
| 27 | #endif | |
| 28 | ||
| 29 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 30 | { | |
| 31 | pgd_t *pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); | |
| 32 | if (pgd) | |
| 33 | pgd_ctor(pgd); | |
| 34 | return pgd; | |
| 35 | } | |
| 36 | ||
| 37 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) | |
| 38 | { | |
| 39 | free_page((unsigned long)pgd); | |
| 40 | } | |
| 41 | ||
| 42 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
| 43 | unsigned long address) | |
| 44 | { | |
| 32d6bd90 | 45 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
| f5df8e26 JH |
46 | return pte; |
| 47 | } | |
| 48 | ||
| 49 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, | |
| 50 | unsigned long address) | |
| 51 | { | |
| 52 | struct page *pte; | |
| 32d6bd90 | 53 | pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0); |
| 855a3053 KS |
54 | if (!pte) |
| 55 | return NULL; | |
| 56 | if (!pgtable_page_ctor(pte)) { | |
| 57 | __free_page(pte); | |
| 58 | return NULL; | |
| 59 | } | |
| f5df8e26 JH |
60 | return pte; |
| 61 | } | |
| 62 | ||
| 63 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
| 64 | { | |
| 65 | free_page((unsigned long)pte); | |
| 66 | } | |
| 67 | ||
| 68 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) | |
| 69 | { | |
| 70 | pgtable_page_dtor(pte); | |
| 71 | __free_page(pte); | |
| 72 | } | |
| 73 | ||
| 74 | #define __pte_free_tlb(tlb, pte, addr) \ | |
| 75 | do { \ | |
| 76 | pgtable_page_dtor(pte); \ | |
| 77 | tlb_remove_page((tlb), (pte)); \ | |
| 78 | } while (0) | |
| 79 | ||
| 80 | #define check_pgt_cache() do { } while (0) | |
| 81 | ||
| 82 | #endif |