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1d18c47c CM |
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 | ||
15670ef1 MR |
29 | #define PGALLOC_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) |
30 | ||
abe669d7 | 31 | #if CONFIG_ARM64_PGTABLE_LEVELS > 2 |
1d18c47c CM |
32 | |
33 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
34 | { | |
15670ef1 | 35 | return (pmd_t *)__get_free_page(PGALLOC_GFP); |
1d18c47c CM |
36 | } |
37 | ||
38 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
39 | { | |
40 | BUG_ON((unsigned long)pmd & (PAGE_SIZE-1)); | |
41 | free_page((unsigned long)pmd); | |
42 | } | |
43 | ||
44 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
45 | { | |
46 | set_pud(pud, __pud(__pa(pmd) | PMD_TYPE_TABLE)); | |
47 | } | |
48 | ||
abe669d7 | 49 | #endif /* CONFIG_ARM64_PGTABLE_LEVELS > 2 */ |
1d18c47c | 50 | |
abe669d7 | 51 | #if CONFIG_ARM64_PGTABLE_LEVELS > 3 |
c79b954b JL |
52 | |
53 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
54 | { | |
15670ef1 | 55 | return (pud_t *)__get_free_page(PGALLOC_GFP); |
c79b954b JL |
56 | } |
57 | ||
58 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) | |
59 | { | |
60 | BUG_ON((unsigned long)pud & (PAGE_SIZE-1)); | |
61 | free_page((unsigned long)pud); | |
62 | } | |
63 | ||
64 | static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) | |
65 | { | |
66 | set_pgd(pgd, __pgd(__pa(pud) | PUD_TYPE_TABLE)); | |
67 | } | |
68 | ||
abe669d7 | 69 | #endif /* CONFIG_ARM64_PGTABLE_LEVELS > 3 */ |
c79b954b | 70 | |
1d18c47c CM |
71 | extern pgd_t *pgd_alloc(struct mm_struct *mm); |
72 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); | |
73 | ||
1d18c47c CM |
74 | static inline pte_t * |
75 | pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) | |
76 | { | |
77 | return (pte_t *)__get_free_page(PGALLOC_GFP); | |
78 | } | |
79 | ||
80 | static inline pgtable_t | |
81 | pte_alloc_one(struct mm_struct *mm, unsigned long addr) | |
82 | { | |
83 | struct page *pte; | |
84 | ||
85 | pte = alloc_pages(PGALLOC_GFP, 0); | |
d97a2291 KS |
86 | if (!pte) |
87 | return NULL; | |
88 | if (!pgtable_page_ctor(pte)) { | |
89 | __free_page(pte); | |
90 | return NULL; | |
91 | } | |
1d18c47c CM |
92 | return pte; |
93 | } | |
94 | ||
95 | /* | |
96 | * Free a PTE table. | |
97 | */ | |
98 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
99 | { | |
100 | if (pte) | |
101 | free_page((unsigned long)pte); | |
102 | } | |
103 | ||
104 | static inline void pte_free(struct mm_struct *mm, pgtable_t pte) | |
105 | { | |
106 | pgtable_page_dtor(pte); | |
107 | __free_page(pte); | |
108 | } | |
109 | ||
110 | static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t pte, | |
111 | pmdval_t prot) | |
112 | { | |
113 | set_pmd(pmdp, __pmd(pte | prot)); | |
114 | } | |
115 | ||
116 | /* | |
117 | * Populate the pmdp entry with a pointer to the pte. This pmd is part | |
118 | * of the mm address space. | |
119 | */ | |
120 | static inline void | |
121 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
122 | { | |
123 | /* | |
124 | * The pmd must be loaded with the physical address of the PTE table | |
125 | */ | |
126 | __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); | |
127 | } | |
128 | ||
129 | static inline void | |
130 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | |
131 | { | |
132 | __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); | |
133 | } | |
134 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
135 | ||
136 | #endif |