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f88df14b DG |
1 | #ifndef _ASM_POWERPC_PGALLOC_64_H |
2 | #define _ASM_POWERPC_PGALLOC_64_H | |
3 | /* | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | */ | |
9 | ||
f88df14b DG |
10 | #include <linux/slab.h> |
11 | #include <linux/cpumask.h> | |
12 | #include <linux/percpu.h> | |
13 | ||
91eea67c MN |
14 | struct vmemmap_backing { |
15 | struct vmemmap_backing *list; | |
16 | unsigned long phys; | |
17 | unsigned long virt_addr; | |
18 | }; | |
8ff81271 | 19 | extern struct vmemmap_backing *vmemmap_list; |
91eea67c | 20 | |
a0668cdc DG |
21 | /* |
22 | * Functions that deal with pagetables that could be at any level of | |
23 | * the table need to be passed an "index_size" so they know how to | |
24 | * handle allocation. For PTE pages (which are linked to a struct | |
25 | * page for now, and drawn from the main get_free_pages() pool), the | |
26 | * allocation size will be (2^index_size * sizeof(pointer)) and | |
27 | * allocations are drawn from the kmem_cache in PGT_CACHE(index_size). | |
28 | * | |
29 | * The maximum index size needs to be big enough to allow any | |
30 | * pagetable sizes we need, but small enough to fit in the low bits of | |
31 | * any page table pointer. In other words all pagetables, even tiny | |
32 | * ones, must be aligned to allow at least enough low 0 bits to | |
33 | * contain this value. This value is also used as a mask, so it must | |
34 | * be one less than a power of two. | |
35 | */ | |
36 | #define MAX_PGTABLE_INDEX_SIZE 0xf | |
37 | ||
f88df14b | 38 | extern struct kmem_cache *pgtable_cache[]; |
cf9427b8 AK |
39 | #define PGT_CACHE(shift) ({ \ |
40 | BUG_ON(!(shift)); \ | |
41 | pgtable_cache[(shift) - 1]; \ | |
42 | }) | |
f88df14b DG |
43 | |
44 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
45 | { | |
de3b8761 BS |
46 | return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), |
47 | pgtable_gfp_flags(mm, GFP_KERNEL)); | |
f88df14b DG |
48 | } |
49 | ||
5e541973 | 50 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
f88df14b | 51 | { |
a0668cdc | 52 | kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); |
f88df14b DG |
53 | } |
54 | ||
27209206 | 55 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, (unsigned long)PUD) |
f88df14b DG |
56 | |
57 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
58 | { | |
de3b8761 BS |
59 | return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), |
60 | pgtable_gfp_flags(mm, GFP_KERNEL)); | |
f88df14b DG |
61 | } |
62 | ||
5e541973 | 63 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) |
f88df14b | 64 | { |
a0668cdc | 65 | kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); |
f88df14b DG |
66 | } |
67 | ||
68 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
69 | { | |
27209206 | 70 | pud_set(pud, (unsigned long)pmd); |
f88df14b DG |
71 | } |
72 | ||
f281b5d5 AK |
73 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, |
74 | pte_t *pte) | |
75 | { | |
27209206 | 76 | pmd_set(pmd, (unsigned long)pte); |
f281b5d5 AK |
77 | } |
78 | ||
79 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
80 | pgtable_t pte_page) | |
81 | { | |
27209206 | 82 | pmd_set(pmd, (unsigned long)page_address(pte_page)); |
f281b5d5 AK |
83 | } |
84 | ||
2f569afd | 85 | #define pmd_pgtable(pmd) pmd_page(pmd) |
f88df14b | 86 | |
70234676 AK |
87 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) |
88 | { | |
89 | return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), | |
90 | pgtable_gfp_flags(mm, GFP_KERNEL)); | |
91 | } | |
92 | ||
93 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
94 | { | |
95 | kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd); | |
96 | } | |
97 | ||
98 | ||
d614bb04 AK |
99 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
100 | unsigned long address) | |
101 | { | |
32d6bd90 | 102 | return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
d614bb04 AK |
103 | } |
104 | ||
105 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, | |
106 | unsigned long address) | |
107 | { | |
108 | struct page *page; | |
109 | pte_t *pte; | |
110 | ||
de3b8761 | 111 | pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO | __GFP_ACCOUNT); |
d614bb04 AK |
112 | if (!pte) |
113 | return NULL; | |
114 | page = virt_to_page(pte); | |
4f804943 KS |
115 | if (!pgtable_page_ctor(page)) { |
116 | __free_page(page); | |
117 | return NULL; | |
118 | } | |
d614bb04 AK |
119 | return page; |
120 | } | |
121 | ||
122 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
123 | { | |
124 | free_page((unsigned long)pte); | |
125 | } | |
126 | ||
127 | static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) | |
128 | { | |
129 | pgtable_page_dtor(ptepage); | |
130 | __free_page(ptepage); | |
131 | } | |
132 | ||
70234676 AK |
133 | static inline void pgtable_free(void *table, int shift) |
134 | { | |
135 | if (!shift) { | |
136 | pgtable_page_dtor(table); | |
137 | free_page((unsigned long)table); | |
138 | } else { | |
139 | BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); | |
140 | kmem_cache_free(PGT_CACHE(shift), table); | |
141 | } | |
142 | } | |
143 | ||
d614bb04 | 144 | #ifdef CONFIG_SMP |
70234676 | 145 | static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) |
d614bb04 | 146 | { |
70234676 AK |
147 | unsigned long pgf = (unsigned long)table; |
148 | ||
149 | BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE); | |
150 | pgf |= shift; | |
151 | tlb_remove_table(tlb, (void *)pgf); | |
d614bb04 | 152 | } |
f88df14b | 153 | |
70234676 | 154 | static inline void __tlb_remove_table(void *_table) |
d614bb04 | 155 | { |
70234676 AK |
156 | void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE); |
157 | unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE; | |
158 | ||
159 | pgtable_free(table, shift); | |
d614bb04 AK |
160 | } |
161 | ||
70234676 AK |
162 | #else |
163 | static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift) | |
d614bb04 | 164 | { |
70234676 AK |
165 | pgtable_free(table, shift); |
166 | } | |
167 | #endif | |
168 | ||
169 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, | |
170 | unsigned long address) | |
171 | { | |
172 | tlb_flush_pgtable(tlb, address); | |
173 | pgtable_free_tlb(tlb, page_address(table), 0); | |
d614bb04 AK |
174 | } |
175 | ||
a0668cdc | 176 | #define __pmd_free_tlb(tlb, pmd, addr) \ |
f940f528 | 177 | pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX) |
27209206 | 178 | #ifndef CONFIG_PPC_64K_PAGES |
9e1b32ca | 179 | #define __pud_free_tlb(tlb, pud, addr) \ |
a0668cdc DG |
180 | pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE) |
181 | ||
27209206 | 182 | #endif /* CONFIG_PPC_64K_PAGES */ |
f88df14b DG |
183 | |
184 | #define check_pgt_cache() do { } while (0) | |
185 | ||
186 | #endif /* _ASM_POWERPC_PGALLOC_64_H */ |