]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _ALPHA_PGALLOC_H |
3 | #define _ALPHA_PGALLOC_H | |
4 | ||
1da177e4 LT |
5 | #include <linux/mm.h> |
6 | #include <linux/mmzone.h> | |
7 | ||
8 | /* | |
9 | * Allocate and free page tables. The xxx_kernel() versions are | |
10 | * used to allocate a kernel page table - this turns on ASN bits | |
11 | * if any. | |
12 | */ | |
13 | ||
14 | static inline void | |
2f569afd | 15 | pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte) |
1da177e4 LT |
16 | { |
17 | pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET)); | |
18 | } | |
2f569afd | 19 | #define pmd_pgtable(pmd) pmd_page(pmd) |
1da177e4 LT |
20 | |
21 | static inline void | |
22 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) | |
23 | { | |
24 | pmd_set(pmd, pte); | |
25 | } | |
26 | ||
27 | static inline void | |
28 | pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) | |
29 | { | |
30 | pgd_set(pgd, pmd); | |
31 | } | |
32 | ||
33 | extern pgd_t *pgd_alloc(struct mm_struct *mm); | |
34 | ||
35 | static inline void | |
5e541973 | 36 | pgd_free(struct mm_struct *mm, pgd_t *pgd) |
1da177e4 LT |
37 | { |
38 | free_page((unsigned long)pgd); | |
39 | } | |
40 | ||
41 | static inline pmd_t * | |
42 | pmd_alloc_one(struct mm_struct *mm, unsigned long address) | |
43 | { | |
32d6bd90 | 44 | pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
1da177e4 LT |
45 | return ret; |
46 | } | |
47 | ||
48 | static inline void | |
5e541973 | 49 | pmd_free(struct mm_struct *mm, pmd_t *pmd) |
1da177e4 LT |
50 | { |
51 | free_page((unsigned long)pmd); | |
52 | } | |
53 | ||
5da7f3d7 IK |
54 | static inline pte_t * |
55 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) | |
56 | { | |
32d6bd90 | 57 | pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
5da7f3d7 IK |
58 | return pte; |
59 | } | |
1da177e4 LT |
60 | |
61 | static inline void | |
5e541973 | 62 | pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
1da177e4 LT |
63 | { |
64 | free_page((unsigned long)pte); | |
65 | } | |
66 | ||
2f569afd MS |
67 | static inline pgtable_t |
68 | pte_alloc_one(struct mm_struct *mm, unsigned long address) | |
1da177e4 | 69 | { |
2f569afd MS |
70 | pte_t *pte = pte_alloc_one_kernel(mm, address); |
71 | struct page *page; | |
72 | ||
73 | if (!pte) | |
74 | return NULL; | |
75 | page = virt_to_page(pte); | |
3fd681b6 KS |
76 | if (!pgtable_page_ctor(page)) { |
77 | __free_page(page); | |
78 | return NULL; | |
79 | } | |
2f569afd | 80 | return page; |
1da177e4 LT |
81 | } |
82 | ||
83 | static inline void | |
2f569afd | 84 | pte_free(struct mm_struct *mm, pgtable_t page) |
1da177e4 | 85 | { |
2f569afd | 86 | pgtable_page_dtor(page); |
1da177e4 LT |
87 | __free_page(page); |
88 | } | |
89 | ||
90 | #define check_pgt_cache() do { } while (0) | |
91 | ||
92 | #endif /* _ALPHA_PGALLOC_H */ |