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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 | { | |
a0668cdc | 46 | return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); |
f88df14b DG |
47 | } |
48 | ||
5e541973 | 49 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
f88df14b | 50 | { |
a0668cdc | 51 | kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); |
f88df14b DG |
52 | } |
53 | ||
54 | #ifndef CONFIG_PPC_64K_PAGES | |
55 | ||
27209206 | 56 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, (unsigned long)PUD) |
f88df14b DG |
57 | |
58 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
59 | { | |
a0668cdc | 60 | return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), |
f88df14b DG |
61 | GFP_KERNEL|__GFP_REPEAT); |
62 | } | |
63 | ||
5e541973 | 64 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) |
f88df14b | 65 | { |
a0668cdc | 66 | kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); |
f88df14b DG |
67 | } |
68 | ||
69 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
70 | { | |
27209206 | 71 | pud_set(pud, (unsigned long)pmd); |
f88df14b DG |
72 | } |
73 | ||
f281b5d5 AK |
74 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, |
75 | pte_t *pte) | |
76 | { | |
27209206 | 77 | pmd_set(pmd, (unsigned long)pte); |
f281b5d5 AK |
78 | } |
79 | ||
80 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, | |
81 | pgtable_t pte_page) | |
82 | { | |
27209206 | 83 | pmd_set(pmd, (unsigned long)page_address(pte_page)); |
f281b5d5 AK |
84 | } |
85 | ||
2f569afd | 86 | #define pmd_pgtable(pmd) pmd_page(pmd) |
f88df14b | 87 | |
d614bb04 AK |
88 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
89 | unsigned long address) | |
90 | { | |
91 | return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); | |
92 | } | |
93 | ||
94 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, | |
95 | unsigned long address) | |
96 | { | |
97 | struct page *page; | |
98 | pte_t *pte; | |
99 | ||
100 | pte = pte_alloc_one_kernel(mm, address); | |
101 | if (!pte) | |
102 | return NULL; | |
103 | page = virt_to_page(pte); | |
4f804943 KS |
104 | if (!pgtable_page_ctor(page)) { |
105 | __free_page(page); | |
106 | return NULL; | |
107 | } | |
d614bb04 AK |
108 | return page; |
109 | } | |
110 | ||
111 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) | |
112 | { | |
113 | free_page((unsigned long)pte); | |
114 | } | |
115 | ||
116 | static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) | |
117 | { | |
118 | pgtable_page_dtor(ptepage); | |
119 | __free_page(ptepage); | |
120 | } | |
121 | ||
934828ed | 122 | extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); |
d614bb04 | 123 | #ifdef CONFIG_SMP |
934828ed AK |
124 | extern void __tlb_remove_table(void *_table); |
125 | #endif | |
d614bb04 AK |
126 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, |
127 | unsigned long address) | |
128 | { | |
d614bb04 | 129 | tlb_flush_pgtable(tlb, address); |
cf77ee54 | 130 | pgtable_free_tlb(tlb, page_address(table), 0); |
d614bb04 | 131 | } |
f88df14b | 132 | |
d614bb04 | 133 | #else /* if CONFIG_PPC_64K_PAGES */ |
5c1f6ee9 | 134 | |
74701d59 AK |
135 | extern pte_t *pte_fragment_alloc(struct mm_struct *, unsigned long, int); |
136 | extern void pte_fragment_free(unsigned long *, int); | |
5c1f6ee9 AK |
137 | extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift); |
138 | #ifdef CONFIG_SMP | |
139 | extern void __tlb_remove_table(void *_table); | |
140 | #endif | |
f88df14b | 141 | |
27209206 | 142 | #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd) |
f88df14b DG |
143 | |
144 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, | |
145 | pte_t *pte) | |
146 | { | |
27209206 | 147 | pmd_set(pmd, (unsigned long)pte); |
f88df14b DG |
148 | } |
149 | ||
d614bb04 AK |
150 | static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, |
151 | pgtable_t pte_page) | |
f88df14b | 152 | { |
27209206 | 153 | pmd_set(pmd, (unsigned long)pte_page); |
f88df14b DG |
154 | } |
155 | ||
d614bb04 | 156 | static inline pgtable_t pmd_pgtable(pmd_t pmd) |
f88df14b | 157 | { |
27209206 | 158 | return (pgtable_t)(pmd_val(pmd) & ~PMD_MASKED_BITS); |
f88df14b DG |
159 | } |
160 | ||
161 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
162 | unsigned long address) | |
163 | { | |
74701d59 | 164 | return (pte_t *)pte_fragment_alloc(mm, address, 1); |
f88df14b DG |
165 | } |
166 | ||
2f569afd | 167 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
5c1f6ee9 | 168 | unsigned long address) |
f88df14b | 169 | { |
74701d59 | 170 | return (pgtable_t)pte_fragment_alloc(mm, address, 0); |
f88df14b DG |
171 | } |
172 | ||
d614bb04 AK |
173 | static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) |
174 | { | |
8017ea35 | 175 | pte_fragment_free((unsigned long *)pte, 1); |
d614bb04 AK |
176 | } |
177 | ||
178 | static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage) | |
179 | { | |
74701d59 | 180 | pte_fragment_free((unsigned long *)ptepage, 0); |
d614bb04 AK |
181 | } |
182 | ||
d614bb04 AK |
183 | static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, |
184 | unsigned long address) | |
185 | { | |
d614bb04 | 186 | tlb_flush_pgtable(tlb, address); |
5c1f6ee9 | 187 | pgtable_free_tlb(tlb, table, 0); |
d614bb04 | 188 | } |
d614bb04 AK |
189 | #endif /* CONFIG_PPC_64K_PAGES */ |
190 | ||
191 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
192 | { | |
f940f528 | 193 | return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), |
d614bb04 AK |
194 | GFP_KERNEL|__GFP_REPEAT); |
195 | } | |
196 | ||
197 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) | |
198 | { | |
f940f528 | 199 | kmem_cache_free(PGT_CACHE(PMD_CACHE_INDEX), pmd); |
d614bb04 AK |
200 | } |
201 | ||
a0668cdc | 202 | #define __pmd_free_tlb(tlb, pmd, addr) \ |
f940f528 | 203 | pgtable_free_tlb(tlb, pmd, PMD_CACHE_INDEX) |
27209206 | 204 | #ifndef CONFIG_PPC_64K_PAGES |
9e1b32ca | 205 | #define __pud_free_tlb(tlb, pud, addr) \ |
a0668cdc DG |
206 | pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE) |
207 | ||
27209206 | 208 | #endif /* CONFIG_PPC_64K_PAGES */ |
f88df14b DG |
209 | |
210 | #define check_pgt_cache() do { } while (0) | |
211 | ||
212 | #endif /* _ASM_POWERPC_PGALLOC_64_H */ |