diff options
Diffstat (limited to 'arch/arm64/include/asm/pgalloc.h')
-rw-r--r-- | arch/arm64/include/asm/pgalloc.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgalloc.h b/arch/arm64/include/asm/pgalloc.h new file mode 100644 index 00000000000..f214069ec5d --- /dev/null +++ b/arch/arm64/include/asm/pgalloc.h | |||
@@ -0,0 +1,113 @@ | |||
1 | /* | ||
2 | * Based on arch/arm/include/asm/pgalloc.h | ||
3 | * | ||
4 | * Copyright (C) 2000-2001 Russell King | ||
5 | * Copyright (C) 2012 ARM Ltd. | ||
6 | * | ||
7 | * This program is free software; you can redistribute it and/or modify | ||
8 | * it under the terms of the GNU General Public License version 2 as | ||
9 | * published by the Free Software Foundation. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License | ||
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
18 | */ | ||
19 | #ifndef __ASM_PGALLOC_H | ||
20 | #define __ASM_PGALLOC_H | ||
21 | |||
22 | #include <asm/pgtable-hwdef.h> | ||
23 | #include <asm/processor.h> | ||
24 | #include <asm/cacheflush.h> | ||
25 | #include <asm/tlbflush.h> | ||
26 | |||
27 | #define check_pgt_cache() do { } while (0) | ||
28 | |||
29 | #ifndef CONFIG_ARM64_64K_PAGES | ||
30 | |||
31 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | ||
32 | { | ||
33 | return (pmd_t *)get_zeroed_page(GFP_KERNEL | __GFP_REPEAT); | ||
34 | } | ||
35 | |||
36 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | ||
37 | { | ||
38 | BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); | ||
39 | free_page((unsigned long)pmd); | ||
40 | } | ||
41 | |||
42 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | ||
43 | { | ||
44 | set_pud(pud, __pud(__pa(pmd) | PMD_TYPE_TABLE)); | ||
45 | } | ||
46 | |||
47 | #endif /* CONFIG_ARM64_64K_PAGES */ | ||
48 | |||
49 | extern pgd_t *pgd_alloc(struct mm_struct *mm); | ||
50 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); | ||
51 | |||
52 | #define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) | ||
53 | |||
54 | static inline pte_t * | ||
55 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) | ||
56 | { | ||
57 | return (pte_t *)__get_free_page(PGALLOC_GFP); | ||
58 | } | ||
59 | |||
60 | static inline pgtable_t | ||
61 | pte_alloc_one(struct mm_struct *mm, unsigned long addr) | ||
62 | { | ||
63 | struct page *pte; | ||
64 | |||
65 | pte = alloc_pages(PGALLOC_GFP, 0); | ||
66 | if (pte) | ||
67 | pgtable_page_ctor(pte); | ||
68 | |||
69 | return pte; | ||
70 | } | ||
71 | |||
72 | /* | ||
73 | * Free a PTE table. | ||
74 | */ | ||
75 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | ||
76 | { | ||
77 | if (pte) | ||
78 | free_page((unsigned long)pte); | ||
79 | } | ||
80 | |||
81 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) | ||
82 | { | ||
83 | pgtable_page_dtor(pte); | ||
84 | __free_page(pte); | ||
85 | } | ||
86 | |||
87 | static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, | ||
88 | pmdval_t prot) | ||
89 | { | ||
90 | set_pmd(pmdp, __pmd(pte | prot)); | ||
91 | } | ||
92 | |||
93 | /* | ||
94 | * Populate the pmdp entry with a pointer to the pte. This pmd is part | ||
95 | * of the mm address space. | ||
96 | */ | ||
97 | static inline void | ||
98 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | ||
99 | { | ||
100 | /* | ||
101 | * The pmd must be loaded with the physical address of the PTE table | ||
102 | */ | ||
103 | __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); | ||
104 | } | ||
105 | |||
106 | static inline void | ||
107 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | ||
108 | { | ||
109 | __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); | ||
110 | } | ||
111 | #define pmd_pgtable(pmd) pmd_page(pmd) | ||
112 | |||
113 | #endif | ||