| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* sun3_pgalloc.h -- |
| 2 | * reorganization around 2.3.39, routines moved from sun3_pgtable.h |
| 3 | * |
| 4 | * |
| 5 | * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam) |
| 6 | * |
| 7 | * moved 1/26/2000 Sam Creasey |
| 8 | */ |
| 9 | |
| 10 | #ifndef _SUN3_PGALLOC_H |
| 11 | #define _SUN3_PGALLOC_H |
| 12 | |
| 13 | #include <asm/tlb.h> |
| 14 | |
| 15 | /* FIXME - when we get this compiling */ |
| 16 | /* erm, now that it's compiling, what do we do with it? */ |
| 17 | #define _KERNPG_TABLE 0 |
| 18 | |
| 19 | extern const char bad_pmd_string[]; |
| 20 | |
| 21 | #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) |
| 22 | |
| 23 | |
| 24 | static inline void pte_free_kernel(pte_t * pte) |
| 25 | { |
| 26 | free_page((unsigned long) pte); |
| 27 | } |
| 28 | |
| 29 | static inline void pte_free(struct page *page) |
| 30 | { |
| 31 | __free_page(page); |
| 32 | } |
| 33 | |
| 34 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) |
| 35 | |
| 36 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
| 37 | unsigned long address) |
| 38 | { |
| 39 | unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT); |
| 40 | |
| 41 | if (!page) |
| 42 | return NULL; |
| 43 | |
| 44 | memset((void *)page, 0, PAGE_SIZE); |
| 45 | return (pte_t *) (page); |
| 46 | } |
| 47 | |
| 48 | static inline struct page *pte_alloc_one(struct mm_struct *mm, |
| 49 | unsigned long address) |
| 50 | { |
| 51 | struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); |
| 52 | |
| 53 | if (page == NULL) |
| 54 | return NULL; |
| 55 | |
| 56 | clear_highpage(page); |
| 57 | return page; |
| 58 | |
| 59 | } |
| 60 | |
| 61 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) |
| 62 | { |
| 63 | pmd_val(*pmd) = __pa((unsigned long)pte); |
| 64 | } |
| 65 | |
| 66 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page) |
| 67 | { |
| 68 | pmd_val(*pmd) = __pa((unsigned long)page_address(page)); |
| 69 | } |
| 70 | |
| 71 | /* |
| 72 | * allocating and freeing a pmd is trivial: the 1-entry pmd is |
| 73 | * inside the pgd, so has no extra memory associated with it. |
| 74 | */ |
| 75 | #define pmd_free(x) do { } while (0) |
| 76 | #define __pmd_free_tlb(tlb, x) do { } while (0) |
| 77 | |
| 78 | static inline void pgd_free(pgd_t * pgd) |
| 79 | { |
| 80 | free_page((unsigned long) pgd); |
| 81 | } |
| 82 | |
| 83 | static inline pgd_t * pgd_alloc(struct mm_struct *mm) |
| 84 | { |
| 85 | pgd_t *new_pgd; |
| 86 | |
| 87 | new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL); |
| 88 | memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE); |
| 89 | memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT)); |
| 90 | return new_pgd; |
| 91 | } |
| 92 | |
| 93 | #define pgd_populate(mm, pmd, pte) BUG() |
| 94 | |
| 95 | #endif /* SUN3_PGALLOC_H */ |