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caab277b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1d18c47c CM |
2 | /* |
3 | * Based on arch/arm/include/asm/pgalloc.h | |
4 | * | |
5 | * Copyright (C) 2000-2001 Russell King | |
6 | * Copyright (C) 2012 ARM Ltd. | |
1d18c47c CM |
7 | */ |
8 | #ifndef __ASM_PGALLOC_H | |
9 | #define __ASM_PGALLOC_H | |
10 | ||
11 | #include <asm/pgtable-hwdef.h> | |
12 | #include <asm/processor.h> | |
13 | #include <asm/cacheflush.h> | |
14 | #include <asm/tlbflush.h> | |
15 | ||
50f11a8a MR |
16 | #include <asm-generic/pgalloc.h> /* for pte_{alloc,free}_one */ |
17 | ||
fd2203dd | 18 | #define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t)) |
15670ef1 | 19 | |
9f25e6ad | 20 | #if CONFIG_PGTABLE_LEVELS > 2 |
1d18c47c CM |
21 | |
22 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
23 | { | |
50f11a8a | 24 | gfp_t gfp = GFP_PGTABLE_USER; |
54c8d911 YZ |
25 | struct page *page; |
26 | ||
50f11a8a MR |
27 | if (mm == &init_mm) |
28 | gfp = GFP_PGTABLE_KERNEL; | |
29 | ||
30 | page = alloc_page(gfp); | |
54c8d911 YZ |
31 | if (!page) |
32 | return NULL; | |
33 | if (!pgtable_pmd_page_ctor(page)) { | |
34 | __free_page(page); | |
35 | return NULL; | |
36 | } | |
37 | return page_address(page); | |
1d18c47c CM |
38 | } |
39 | ||
20a004e7 | 40 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmdp) |
1d18c47c | 41 | { |
20a004e7 | 42 | BUG_ON((unsigned long)pmdp & (PAGE_SIZE-1)); |
54c8d911 | 43 | pgtable_pmd_page_dtor(virt_to_page(pmdp)); |
20a004e7 | 44 | free_page((unsigned long)pmdp); |
1d18c47c CM |
45 | } |
46 | ||
20a004e7 | 47 | static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) |
1d18c47c | 48 | { |
20a004e7 | 49 | set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot)); |
1d18c47c CM |
50 | } |
51 | ||
20a004e7 | 52 | static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp) |
1e531cce | 53 | { |
20a004e7 | 54 | __pud_populate(pudp, __pa(pmdp), PMD_TYPE_TABLE); |
1e531cce MR |
55 | } |
56 | #else | |
20a004e7 | 57 | static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot) |
1e531cce MR |
58 | { |
59 | BUILD_BUG(); | |
60 | } | |
9f25e6ad | 61 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
1d18c47c | 62 | |
9f25e6ad | 63 | #if CONFIG_PGTABLE_LEVELS > 3 |
c79b954b JL |
64 | |
65 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
66 | { | |
50f11a8a | 67 | return (pud_t *)__get_free_page(GFP_PGTABLE_USER); |
c79b954b JL |
68 | } |
69 | ||
20a004e7 | 70 | static inline void pud_free(struct mm_struct *mm, pud_t *pudp) |
c79b954b | 71 | { |
20a004e7 WD |
72 | BUG_ON((unsigned long)pudp & (PAGE_SIZE-1)); |
73 | free_page((unsigned long)pudp); | |
c79b954b JL |
74 | } |
75 | ||
e9f63768 | 76 | static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) |
c79b954b | 77 | { |
e9f63768 | 78 | set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot)); |
c79b954b JL |
79 | } |
80 | ||
e9f63768 | 81 | static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp) |
1e531cce | 82 | { |
e9f63768 | 83 | __p4d_populate(p4dp, __pa(pudp), PUD_TYPE_TABLE); |
1e531cce MR |
84 | } |
85 | #else | |
e9f63768 | 86 | static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot) |
1e531cce MR |
87 | { |
88 | BUILD_BUG(); | |
89 | } | |
9f25e6ad | 90 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
c79b954b | 91 | |
1d18c47c | 92 | extern pgd_t *pgd_alloc(struct mm_struct *mm); |
20a004e7 | 93 | extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp); |
1d18c47c | 94 | |
20a004e7 | 95 | static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep, |
1d18c47c CM |
96 | pmdval_t prot) |
97 | { | |
20a004e7 | 98 | set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot)); |
1d18c47c CM |
99 | } |
100 | ||
101 | /* | |
102 | * Populate the pmdp entry with a pointer to the pte. This pmd is part | |
103 | * of the mm address space. | |
104 | */ | |
105 | static inline void | |
106 | pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep) | |
107 | { | |
108 | /* | |
109 | * The pmd must be loaded with the physical address of the PTE table | |
110 | */ | |
111 | __pmd_populate(pmdp, __pa(ptep), PMD_TYPE_TABLE); | |
112 | } | |
113 | ||
114 | static inline void | |
115 | pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep) | |
116 | { | |
117 | __pmd_populate(pmdp, page_to_phys(ptep), PMD_TYPE_TABLE); | |
118 | } | |
119 | #define pmd_pgtable(pmd) pmd_page(pmd) | |
120 | ||
121 | #endif |