projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _X86_64_PGALLOC_H |
| 2 | #define _X86_64_PGALLOC_H | |
| 3 | ||
| 4 | #include <asm/fixmap.h> | |
| 5 | #include <asm/pda.h> | |
| 6 | #include <linux/threads.h> | |
| 7 | #include <linux/mm.h> | |
| 8 | ||
| 9 | #define pmd_populate_kernel(mm, pmd, pte) \ | |
| 10 | set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte))) | |
| 11 | #define pud_populate(mm, pud, pmd) \ | |
| 12 | set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd))) | |
| 13 | #define pgd_populate(mm, pgd, pud) \ | |
| 14 | set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))) | |
| 15 | ||
| 16 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) | |
| 17 | { | |
| 18 | set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT))); | |
| 19 | } | |
| 20 | ||
| 21 | extern __inline__ pmd_t *get_pmd(void) | |
| 22 | { | |
| 23 | return (pmd_t *)get_zeroed_page(GFP_KERNEL); | |
| 24 | } | |
| 25 | ||
| 26 | extern __inline__ void pmd_free(pmd_t *pmd) | |
| 27 | { | |
| 28 | BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); | |
| 29 | free_page((unsigned long)pmd); | |
| 30 | } | |
| 31 | ||
| 32 | static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr) | |
| 33 | { | |
| 34 | return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
| 35 | } | |
| 36 | ||
| 37 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
| 38 | { | |
| 39 | return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
| 40 | } | |
| 41 | ||
| 42 | static inline void pud_free (pud_t *pud) | |
| 43 | { | |
| 44 | BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); | |
| 45 | free_page((unsigned long)pud); | |
| 46 | } | |
| 47 | ||
| 48 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 49 | { | |
| 50 | unsigned boundary; | |
| 51 | pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT); | |
| 52 | if (!pgd) | |
| 53 | return NULL; | |
| 54 | /* | |
| 55 | * Copy kernel pointers in from init. | |
| 56 | * Could keep a freelist or slab cache of those because the kernel | |
| 57 | * part never changes. | |
| 58 | */ | |
| 59 | boundary = pgd_index(__PAGE_OFFSET); | |
| 60 | memset(pgd, 0, boundary * sizeof(pgd_t)); | |
| 61 | memcpy(pgd + boundary, | |
| 62 | init_level4_pgt + boundary, | |
| 63 | (PTRS_PER_PGD - boundary) * sizeof(pgd_t)); | |
| 64 | return pgd; | |
| 65 | } | |
| 66 | ||
| 67 | static inline void pgd_free(pgd_t *pgd) | |
| 68 | { | |
| 69 | BUG_ON((unsigned long)pgd & (PAGE_SIZE-1)); | |
| 70 | free_page((unsigned long)pgd); | |
| 71 | } | |
| 72 | ||
| 73 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) | |
| 74 | { | |
| 75 | return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
| 76 | } | |
| 77 | ||
| 78 | static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) | |
| 79 | { | |
| 80 | void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); | |
| 81 | if (!p) | |
| 82 | return NULL; | |
| 83 | return virt_to_page(p); | |
| 84 | } | |
| 85 | ||
| 86 | /* Should really implement gc for free page table pages. This could be | |
| 87 | done with a reference count in struct page. */ | |
| 88 | ||
| 89 | extern __inline__ void pte_free_kernel(pte_t *pte) | |
| 90 | { | |
| 91 | BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); | |
| 92 | free_page((unsigned long)pte); | |
| 93 | } | |
| 94 | ||
| 95 | extern inline void pte_free(struct page *pte) | |
| 96 | { | |
| 97 | __free_page(pte); | |
| 98 | } | |
| 99 | ||
| 100 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
| 101 | ||
| 102 | #define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x)) | |
| 103 | #define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x)) | |
| 104 | ||
| 105 | #endif /* _X86_64_PGALLOC_H */ |