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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 | ||
53 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
54 | unsigned long address) | |
55 | { | |
db19462b | 56 | return (pte_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, PTE_ORDER); |
1da177e4 LT |
57 | } |
58 | ||
59 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
60 | unsigned long address) | |
61 | { | |
62 | struct page *pte; | |
63 | ||
65f84656 | 64 | pte = alloc_pages(GFP_KERNEL, PTE_ORDER); |
3b5b51c1 KS |
65 | if (!pte) |
66 | return NULL; | |
67 | clear_highpage(pte); | |
68 | if (!pgtable_page_ctor(pte)) { | |
69 | __free_page(pte); | |
70 | return NULL; | |
2f569afd | 71 | } |
1da177e4 LT |
72 | return pte; |
73 | } | |
74 | ||
5e541973 | 75 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
1da177e4 LT |
76 | { |
77 | free_pages((unsigned long)pte, PTE_ORDER); | |
78 | } | |
79 | ||
2f569afd | 80 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) |
1da177e4 | 81 | { |
2f569afd | 82 | pgtable_page_dtor(pte); |
1da177e4 LT |
83 | __free_pages(pte, PTE_ORDER); |
84 | } | |
85 | ||
9e1b32ca | 86 | #define __pte_free_tlb(tlb,pte,address) \ |
2f569afd MS |
87 | do { \ |
88 | pgtable_page_dtor(pte); \ | |
89 | tlb_remove_page((tlb), pte); \ | |
90 | } while (0) | |
1da177e4 | 91 | |
325f8a0a | 92 | #ifndef __PAGETABLE_PMD_FOLDED |
1da177e4 | 93 | |
1da177e4 LT |
94 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) |
95 | { | |
96 | pmd_t *pmd; | |
97 | ||
65f84656 | 98 | pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ORDER); |
1da177e4 LT |
99 | if (pmd) |
100 | pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table); | |
101 | return pmd; | |
102 | } | |
103 | ||
5e541973 | 104 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |
1da177e4 LT |
105 | { |
106 | free_pages((unsigned long)pmd, PMD_ORDER); | |
107 | } | |
108 | ||
9e1b32ca | 109 | #define __pmd_free_tlb(tlb, x, addr) pmd_free((tlb)->mm, x) |
1da177e4 LT |
110 | |
111 | #endif | |
112 | ||
113 | #define check_pgt_cache() do { } while (0) | |
114 | ||
6a1e5529 AN |
115 | extern void pagetable_init(void); |
116 | ||
1da177e4 | 117 | #endif /* _ASM_PGALLOC_H */ |