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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); | |
814f91bf | 46 | extern pgd_t *pgd_alloc(struct mm_struct *mm); |
1da177e4 | 47 | |
5e541973 | 48 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
1da177e4 LT |
49 | { |
50 | free_pages((unsigned long)pgd, PGD_ORDER); | |
51 | } | |
52 | ||
4cf58924 | 53 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) |
1da177e4 | 54 | { |
db19462b | 55 | return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER); |
1da177e4 LT |
56 | } |
57 | ||
4cf58924 | 58 | static inline struct page *pte_alloc_one(struct mm_struct *mm) |
1da177e4 LT |
59 | { |
60 | struct page *pte; | |
61 | ||
65f84656 | 62 | pte = alloc_pages(GFP_KERNEL, PTE_ORDER); |
3b5b51c1 KS |
63 | if (!pte) |
64 | return NULL; | |
65 | clear_highpage(pte); | |
66 | if (!pgtable_page_ctor(pte)) { | |
67 | __free_page(pte); | |
68 | return NULL; | |
2f569afd | 69 | } |
1da177e4 LT |
70 | return pte; |
71 | } | |
72 | ||
5e541973 | 73 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
1da177e4 LT |
74 | { |
75 | free_pages((unsigned long)pte, PTE_ORDER); | |
76 | } | |
77 | ||
2f569afd | 78 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
1da177e4 | 79 | { |
2f569afd | 80 | pgtable_page_dtor(pte); |
1da177e4 LT |
81 | __free_pages(pte, PTE_ORDER); |
82 | } | |
83 | ||
9e1b32ca | 84 | #define __pte_free_tlb(tlb,pte,address) \ |
2f569afd MS |
85 | do { \ |
86 | pgtable_page_dtor(pte); \ | |
87 | tlb_remove_page((tlb), pte); \ | |
88 | } while (0) | |
1da177e4 | 89 | |
325f8a0a | 90 | #ifndef __PAGETABLE_PMD_FOLDED |
1da177e4 | 91 | |
1da177e4 LT |
92 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
93 | { | |
94 | pmd_t *pmd; | |
95 | ||
65f84656 | 96 | pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); |
1da177e4 LT |
97 | if (pmd) |
98 | pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); | |
99 | return pmd; | |
100 | } | |
101 | ||
5e541973 | 102 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |
1da177e4 LT |
103 | { |
104 | free_pages((unsigned long)pmd, PMD_ORDER); | |
105 | } | |
106 | ||
9e1b32ca | 107 | #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) |
1da177e4 LT |
108 | |
109 | #endif | |
110 | ||
3377e227 AB |
111 | #ifndef __PAGETABLE_PUD_FOLDED |
112 | ||
113 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) | |
114 | { | |
115 | pud_t *pud; | |
116 | ||
473738eb | 117 | pud = (pud_t *) __get_free_pages(GFP_KERNEL, PUD_ORDER); |
3377e227 AB |
118 | if (pud) |
119 | pud_init((unsigned long)pud, (unsigned long)invalid_pmd_table); | |
120 | return pud; | |
121 | } | |
122 | ||
123 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) | |
124 | { | |
125 | free_pages((unsigned long)pud, PUD_ORDER); | |
126 | } | |
127 | ||
128 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) | |
129 | { | |
130 | set_pgd(pgd, __pgd((unsigned long)pud)); | |
131 | } | |
132 | ||
133 | #define __pud_free_tlb(tlb, x, addr) pud_free((tlb)->mm, x) | |
134 | ||
135 | #endif /* __PAGETABLE_PUD_FOLDED */ | |
136 | ||
1da177e4 LT |
137 | #define check_pgt_cache() do { } while (0) |
138 | ||
6a1e5529 AN |
139 | extern void pagetable_init(void); |
140 | ||
1da177e4 | 141 | #endif /* _ASM_PGALLOC_H */ |