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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 | }; | |
19 | ||
a0668cdc DG |
20 | /* |
21 | * Functions that deal with pagetables that could be at any level of | |
22 | * the table need to be passed an "index_size" so they know how to | |
23 | * handle allocation. For PTE pages (which are linked to a struct | |
24 | * page for now, and drawn from the main get_free_pages() pool), the | |
25 | * allocation size will be (2^index_size * sizeof(pointer)) and | |
26 | * allocations are drawn from the kmem_cache in PGT_CACHE(index_size). | |
27 | * | |
28 | * The maximum index size needs to be big enough to allow any | |
29 | * pagetable sizes we need, but small enough to fit in the low bits of | |
30 | * any page table pointer. In other words all pagetables, even tiny | |
31 | * ones, must be aligned to allow at least enough low 0 bits to | |
32 | * contain this value. This value is also used as a mask, so it must | |
33 | * be one less than a power of two. | |
34 | */ | |
35 | #define MAX_PGTABLE_INDEX_SIZE 0xf | |
36 | ||
f88df14b | 37 | extern struct kmem_cache *pgtable_cache[]; |
a0668cdc | 38 | #define PGT_CACHE(shift) (pgtable_cache[(shift)-1]) |
f88df14b DG |
39 | |
40 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
41 | { | |
a0668cdc | 42 | return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); |
f88df14b DG |
43 | } |
44 | ||
5e541973 | 45 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
f88df14b | 46 | { |
a0668cdc | 47 | kmem_cache_free(PGT_CACHE(PGD_INDEX_SIZE), pgd); |
f88df14b DG |
48 | } |
49 | ||
50 | #ifndef CONFIG_PPC_64K_PAGES | |
51 | ||
52 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD) | |
53 | ||
54 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
55 | { | |
a0668cdc | 56 | return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), |
f88df14b DG |
57 | GFP_KERNEL|__GFP_REPEAT); |
58 | } | |
59 | ||
5e541973 | 60 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) |
f88df14b | 61 | { |
a0668cdc | 62 | kmem_cache_free(PGT_CACHE(PUD_INDEX_SIZE), pud); |
f88df14b DG |
63 | } |
64 | ||
65 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
66 | { | |
67 | pud_set(pud, (unsigned long)pmd); | |
68 | } | |
69 | ||
70 | #define pmd_populate(mm, pmd, pte_page) \ | |
71 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | |
72 | #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte)) | |
2f569afd | 73 | #define pmd_pgtable(pmd) pmd_page(pmd) |
f88df14b DG |
74 | |
75 | ||
76 | #else /* CONFIG_PPC_64K_PAGES */ | |
77 | ||
78 | #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd) | |
79 | ||
80 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, | |
81 | pte_t *pte) | |
82 | { | |
83 | pmd_set(pmd, (unsigned long)pte); | |
84 | } | |
85 | ||
86 | #define pmd_populate(mm, pmd, pte_page) \ | |
87 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | |
2f569afd | 88 | #define pmd_pgtable(pmd) pmd_page(pmd) |
f88df14b DG |
89 | |
90 | #endif /* CONFIG_PPC_64K_PAGES */ | |
91 | ||
92 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
93 | { | |
a0668cdc | 94 | return kmem_cache_alloc(PGT_CACHE(PMD_INDEX_SIZE), |
f88df14b DG |
95 | GFP_KERNEL|__GFP_REPEAT); |
96 | } | |
97 | ||
5e541973 | 98 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |
f88df14b | 99 | { |
a0668cdc | 100 | kmem_cache_free(PGT_CACHE(PMD_INDEX_SIZE), pmd); |
f88df14b DG |
101 | } |
102 | ||
103 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
104 | unsigned long address) | |
105 | { | |
517e2263 | 106 | return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); |
f88df14b DG |
107 | } |
108 | ||
2f569afd MS |
109 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
110 | unsigned long address) | |
f88df14b | 111 | { |
2f569afd MS |
112 | struct page *page; |
113 | pte_t *pte; | |
114 | ||
115 | pte = pte_alloc_one_kernel(mm, address); | |
116 | if (!pte) | |
117 | return NULL; | |
118 | page = virt_to_page(pte); | |
119 | pgtable_page_ctor(page); | |
120 | return page; | |
f88df14b DG |
121 | } |
122 | ||
a0668cdc | 123 | static inline void pgtable_free(void *table, unsigned index_size) |
f88df14b | 124 | { |
a0668cdc DG |
125 | if (!index_size) |
126 | free_page((unsigned long)table); | |
127 | else { | |
128 | BUG_ON(index_size > MAX_PGTABLE_INDEX_SIZE); | |
129 | kmem_cache_free(PGT_CACHE(index_size), table); | |
130 | } | |
f88df14b DG |
131 | } |
132 | ||
a0668cdc DG |
133 | #define __pmd_free_tlb(tlb, pmd, addr) \ |
134 | pgtable_free_tlb(tlb, pmd, PMD_INDEX_SIZE) | |
f88df14b | 135 | #ifndef CONFIG_PPC_64K_PAGES |
9e1b32ca | 136 | #define __pud_free_tlb(tlb, pud, addr) \ |
a0668cdc DG |
137 | pgtable_free_tlb(tlb, pud, PUD_INDEX_SIZE) |
138 | ||
f88df14b DG |
139 | #endif /* CONFIG_PPC_64K_PAGES */ |
140 | ||
141 | #define check_pgt_cache() do { } while (0) | |
142 | ||
143 | #endif /* _ASM_POWERPC_PGALLOC_64_H */ |