projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle | |
| 7 | * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. | |
| 8 | */ | |
| 9 | #ifndef _ASM_PGALLOC_H | |
| 10 | #define _ASM_PGALLOC_H | |
| 11 | ||
| 12 | #include <linux/config.h> | |
| 13 | #include <linux/highmem.h> | |
| 14 | #include <linux/mm.h> | |
| 15 | ||
| 16 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, | |
| 17 | pte_t *pte) | |
| 18 | { | |
| 19 | set_pmd(pmd, __pmd((unsigned long)pte)); | |
| 20 | } | |
| 21 | ||
| 22 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
| 23 | struct page *pte) | |
| 24 | { | |
| 25 | set_pmd(pmd, __pmd((unsigned long)page_address(pte))); | |
| 26 | } | |
| 27 | ||
| 28 | /* | |
| 29 | * Initialize a new pgd / pmd table with invalid pointers. | |
| 30 | */ | |
| 31 | extern void pgd_init(unsigned long page); | |
| 32 | extern void pmd_init(unsigned long page, unsigned long pagetable); | |
| 33 | ||
| 34 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
| 35 | { | |
| 36 | pgd_t *ret, *init; | |
| 37 | ||
| 38 | ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER); | |
| 39 | if (ret) { | |
| 40 | init = pgd_offset(&init_mm, 0); | |
| 41 | pgd_init((unsigned long)ret); | |
| 42 | memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, | |
| 43 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
| 44 | } | |
| 45 | ||
| 46 | return ret; | |
| 47 | } | |
| 48 | ||
| 49 | static inline void pgd_free(pgd_t *pgd) | |
| 50 | { | |
| 51 | free_pages((unsigned long)pgd, PGD_ORDER); | |
| 52 | } | |
| 53 | ||
| 54 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
| 55 | unsigned long address) | |
| 56 | { | |
| 57 | pte_t *pte; | |
| 58 | ||
| 59 | pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, PTE_ORDER); | |
| 60 | ||
| 61 | return pte; | |
| 62 | } | |
| 63 | ||
| 64 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
| 65 | unsigned long address) | |
| 66 | { | |
| 67 | struct page *pte; | |
| 68 | ||
| 69 | pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER); | |
| 70 | if (pte) | |
| 71 | clear_highpage(pte); | |
| 72 | ||
| 73 | return pte; | |
| 74 | } | |
| 75 | ||
| 76 | static inline void pte_free_kernel(pte_t *pte) | |
| 77 | { | |
| 78 | free_pages((unsigned long)pte, PTE_ORDER); | |
| 79 | } | |
| 80 | ||
| 81 | static inline void pte_free(struct page *pte) | |
| 82 | { | |
| 83 | __free_pages(pte, PTE_ORDER); | |
| 84 | } | |
| 85 | ||
| 86 | #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) | |
| 87 | ||
| 88 | #ifdef CONFIG_MIPS32 | |
| 89 | #define pgd_populate(mm, pmd, pte) BUG() | |
| 90 | ||
| 91 | /* | |
| 92 | * allocating and freeing a pmd is trivial: the 1-entry pmd is | |
| 93 | * inside the pgd, so has no extra memory associated with it. | |
| 94 | */ | |
| 95 | #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) | |
| 96 | #define pmd_free(x) do { } while (0) | |
| 97 | #define __pmd_free_tlb(tlb,x) do { } while (0) | |
| 98 | #endif | |
| 99 | ||
| 100 | #ifdef CONFIG_MIPS64 | |
| 101 | ||
| 102 | #define pgd_populate(mm, pgd, pmd) set_pgd(pgd, __pgd(pmd)) | |
| 103 | ||
| 104 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) | |
| 105 | { | |
| 106 | pmd_t *pmd; | |
| 107 | ||
| 108 | pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER); | |
| 109 | if (pmd) | |
| 110 | pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); | |
| 111 | return pmd; | |
| 112 | } | |
| 113 | ||
| 114 | static inline void pmd_free(pmd_t *pmd) | |
| 115 | { | |
| 116 | free_pages((unsigned long)pmd, PMD_ORDER); | |
| 117 | } | |
| 118 | ||
| 119 | #define __pmd_free_tlb(tlb,x) pmd_free(x) | |
| 120 | ||
| 121 | #endif | |
| 122 | ||
| 123 | #define check_pgt_cache() do { } while (0) | |
| 124 | ||
| 125 | #endif /* _ASM_PGALLOC_H */ |