projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5f97f7f9 HS |
1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | */ | |
| 8 | #ifndef __ASM_AVR32_PGALLOC_H | |
| 9 | #define __ASM_AVR32_PGALLOC_H | |
| 10 | ||
| 5a4d5292 HS |
11 | #include <linux/quicklist.h> |
| 12 | #include <asm/page.h> | |
| 13 | #include <asm/pgtable.h> | |
| 14 | ||
| 15 | #define QUICK_PGD 0 /* Preserve kernel mappings over free */ | |
| 38510754 | 16 | #define QUICK_PT 1 /* Zero on free */ |
| 5f97f7f9 | 17 | |
| cfd23e93 HS |
18 | static inline void pmd_populate_kernel(struct mm_struct *mm, |
| 19 | pmd_t *pmd, pte_t *pte) | |
| 20 | { | |
| 21 | set_pmd(pmd, __pmd((unsigned long)pte)); | |
| 22 | } | |
| 5f97f7f9 | 23 | |
| cfd23e93 | 24 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, |
| 2f569afd | 25 | pgtable_t pte) |
| 5f97f7f9 | 26 | { |
| cfd23e93 | 27 | set_pmd(pmd, __pmd((unsigned long)page_address(pte))); |
| 5f97f7f9 | 28 | } |
| 2f569afd | 29 | #define pmd_pgtable(pmd) pmd_page(pmd) |
| 5f97f7f9 | 30 | |
| 5a4d5292 HS |
31 | static inline void pgd_ctor(void *x) |
| 32 | { | |
| 33 | pgd_t *pgd = x; | |
| 34 | ||
| 35 | memcpy(pgd + USER_PTRS_PER_PGD, | |
| 36 | swapper_pg_dir + USER_PTRS_PER_PGD, | |
| 37 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
| 38 | } | |
| 39 | ||
| 5f97f7f9 HS |
40 | /* |
| 41 | * Allocate and free page tables | |
| 42 | */ | |
| cfd23e93 | 43 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
| 5f97f7f9 | 44 | { |
| 5a4d5292 | 45 | return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor); |
| 5f97f7f9 HS |
46 | } |
| 47 | ||
| 5e541973 | 48 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
| 5f97f7f9 | 49 | { |
| 5a4d5292 | 50 | quicklist_free(QUICK_PGD, NULL, pgd); |
| 5f97f7f9 HS |
51 | } |
| 52 | ||
| 53 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
| 54 | unsigned long address) | |
| 55 | { | |
| 38510754 | 56 | return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); |
| 5f97f7f9 HS |
57 | } |
| 58 | ||
| 38510754 | 59 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
| 5f97f7f9 HS |
60 | unsigned long address) |
| 61 | { | |
| 38510754 HS |
62 | struct page *page; |
| 63 | void *pg; | |
| 5f97f7f9 | 64 | |
| 38510754 HS |
65 | pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL); |
| 66 | if (!pg) | |
| 2f569afd | 67 | return NULL; |
| 38510754 HS |
68 | |
| 69 | page = virt_to_page(pg); | |
| 70 | pgtable_page_ctor(page); | |
| 71 | ||
| 72 | return page; | |
| 5f97f7f9 HS |
73 | } |
| 74 | ||
| 5e541973 | 75 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
| 5f97f7f9 | 76 | { |
| 38510754 | 77 | quicklist_free(QUICK_PT, NULL, pte); |
| 5f97f7f9 HS |
78 | } |
| 79 | ||
| 2f569afd | 80 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
| 5f97f7f9 | 81 | { |
| 2f569afd | 82 | pgtable_page_dtor(pte); |
| 38510754 | 83 | quicklist_free_page(QUICK_PT, NULL, pte); |
| 5f97f7f9 HS |
84 | } |
| 85 | ||
| 2f569afd MS |
86 | #define __pte_free_tlb(tlb,pte) \ |
| 87 | do { \ | |
| 88 | pgtable_page_dtor(pte); \ | |
| 89 | tlb_remove_page((tlb), pte); \ | |
| 90 | } while (0) | |
| 5f97f7f9 | 91 | |
| 5a4d5292 HS |
92 | static inline void check_pgt_cache(void) |
| 93 | { | |
| 94 | quicklist_trim(QUICK_PGD, NULL, 25, 16); | |
| 38510754 | 95 | quicklist_trim(QUICK_PT, NULL, 25, 16); |
| 5a4d5292 | 96 | } |
| 5f97f7f9 HS |
97 | |
| 98 | #endif /* __ASM_AVR32_PGALLOC_H */ |