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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 | ||
1da177e4 LT |
12 | #include <linux/highmem.h> |
13 | #include <linux/mm.h> | |
e8edc6e0 | 14 | #include <linux/sched.h> |
1da177e4 LT |
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, | |
2f569afd | 23 | pgtable_t pte) |
1da177e4 LT |
24 | { |
25 | set_pmd(pmd, __pmd((unsigned long)page_address(pte))); | |
26 | } | |
2f569afd | 27 | #define pmd_pgtable(pmd) pmd_page(pmd) |
1da177e4 | 28 | |
c6e8b587 RB |
29 | /* |
30 | * Initialize a new pmd table with invalid pointers. | |
31 | */ | |
32 | extern void pmd_init(unsigned long page, unsigned long pagetable); | |
33 | ||
325f8a0a | 34 | #ifndef __PAGETABLE_PMD_FOLDED |
c6e8b587 RB |
35 | |
36 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
37 | { | |
38 | set_pud(pud, __pud((unsigned long)pmd)); | |
39 | } | |
40 | #endif | |
41 | ||
1da177e4 LT |
42 | /* |
43 | * Initialize a new pgd / pmd table with invalid pointers. | |
44 | */ | |
45 | extern void pgd_init(unsigned long page); | |
1da177e4 LT |
46 | |
47 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
48 | { | |
49 | pgd_t *ret, *init; | |
50 | ||
51 | ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER); | |
52 | if (ret) { | |
242954b5 | 53 | init = pgd_offset(&init_mm, 0UL); |
1da177e4 LT |
54 | pgd_init((unsigned long)ret); |
55 | memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD, | |
56 | (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); | |
57 | } | |
58 | ||
59 | return ret; | |
60 | } | |
61 | ||
5e541973 | 62 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
1da177e4 LT |
63 | { |
64 | free_pages((unsigned long)pgd, PGD_ORDER); | |
65 | } | |
66 | ||
67 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
68 | unsigned long address) | |
69 | { | |
70 | pte_t *pte; | |
71 | ||
65f84656 | 72 | pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER); |
1da177e4 LT |
73 | |
74 | return pte; | |
75 | } | |
76 | ||
77 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
78 | unsigned long address) | |
79 | { | |
80 | struct page *pte; | |
81 | ||
65f84656 | 82 | pte = alloc_pages(GFP_KERNEL, PTE_ORDER); |
3b5b51c1 KS |
83 | if (!pte) |
84 | return NULL; | |
85 | clear_highpage(pte); | |
86 | if (!pgtable_page_ctor(pte)) { | |
87 | __free_page(pte); | |
88 | return NULL; | |
2f569afd | 89 | } |
1da177e4 LT |
90 | return pte; |
91 | } | |
92 | ||
5e541973 | 93 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
1da177e4 LT |
94 | { |
95 | free_pages((unsigned long)pte, PTE_ORDER); | |
96 | } | |
97 | ||
2f569afd | 98 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
1da177e4 | 99 | { |
2f569afd | 100 | pgtable_page_dtor(pte); |
1da177e4 LT |
101 | __free_pages(pte, PTE_ORDER); |
102 | } | |
103 | ||
9e1b32ca | 104 | #define __pte_free_tlb(tlb,pte,address) \ |
2f569afd MS |
105 | do { \ |
106 | pgtable_page_dtor(pte); \ | |
107 | tlb_remove_page((tlb), pte); \ | |
108 | } while (0) | |
1da177e4 | 109 | |
325f8a0a | 110 | #ifndef __PAGETABLE_PMD_FOLDED |
1da177e4 | 111 | |
1da177e4 LT |
112 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
113 | { | |
114 | pmd_t *pmd; | |
115 | ||
65f84656 | 116 | pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); |
1da177e4 LT |
117 | if (pmd) |
118 | pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); | |
119 | return pmd; | |
120 | } | |
121 | ||
5e541973 | 122 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |
1da177e4 LT |
123 | { |
124 | free_pages((unsigned long)pmd, PMD_ORDER); | |
125 | } | |
126 | ||
9e1b32ca | 127 | #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) |
1da177e4 LT |
128 | |
129 | #endif | |
130 | ||
131 | #define check_pgt_cache() do { } while (0) | |
132 | ||
6a1e5529 AN |
133 | extern void pagetable_init(void); |
134 | ||
1da177e4 | 135 | #endif /* _ASM_PGALLOC_H */ |