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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 | ||
10 | #include <linux/mm.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/cpumask.h> | |
13 | #include <linux/percpu.h> | |
14 | ||
15 | extern struct kmem_cache *pgtable_cache[]; | |
16 | ||
517e2263 HD |
17 | #define PGD_CACHE_NUM 0 |
18 | #define PUD_CACHE_NUM 1 | |
19 | #define PMD_CACHE_NUM 1 | |
20 | #define HUGEPTE_CACHE_NUM 2 | |
21 | #define PTE_NONCACHE_NUM 3 /* from GFP rather than kmem_cache */ | |
f88df14b DG |
22 | |
23 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) | |
24 | { | |
25 | return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL); | |
26 | } | |
27 | ||
28 | static inline void pgd_free(pgd_t *pgd) | |
29 | { | |
30 | kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd); | |
31 | } | |
32 | ||
33 | #ifndef CONFIG_PPC_64K_PAGES | |
34 | ||
35 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD) | |
36 | ||
37 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
38 | { | |
39 | return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM], | |
40 | GFP_KERNEL|__GFP_REPEAT); | |
41 | } | |
42 | ||
43 | static inline void pud_free(pud_t *pud) | |
44 | { | |
45 | kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud); | |
46 | } | |
47 | ||
48 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) | |
49 | { | |
50 | pud_set(pud, (unsigned long)pmd); | |
51 | } | |
52 | ||
53 | #define pmd_populate(mm, pmd, pte_page) \ | |
54 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | |
55 | #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte)) | |
56 | ||
57 | ||
58 | #else /* CONFIG_PPC_64K_PAGES */ | |
59 | ||
60 | #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd) | |
61 | ||
62 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, | |
63 | pte_t *pte) | |
64 | { | |
65 | pmd_set(pmd, (unsigned long)pte); | |
66 | } | |
67 | ||
68 | #define pmd_populate(mm, pmd, pte_page) \ | |
69 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | |
70 | ||
71 | #endif /* CONFIG_PPC_64K_PAGES */ | |
72 | ||
73 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) | |
74 | { | |
75 | return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM], | |
76 | GFP_KERNEL|__GFP_REPEAT); | |
77 | } | |
78 | ||
79 | static inline void pmd_free(pmd_t *pmd) | |
80 | { | |
81 | kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd); | |
82 | } | |
83 | ||
84 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, | |
85 | unsigned long address) | |
86 | { | |
517e2263 | 87 | return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); |
f88df14b DG |
88 | } |
89 | ||
90 | static inline struct page *pte_alloc_one(struct mm_struct *mm, | |
91 | unsigned long address) | |
92 | { | |
a4c28ab7 AM |
93 | pte_t *pte = pte_alloc_one_kernel(mm, address); |
94 | return pte ? virt_to_page(pte) : NULL; | |
f88df14b DG |
95 | } |
96 | ||
97 | static inline void pte_free_kernel(pte_t *pte) | |
98 | { | |
517e2263 | 99 | free_page((unsigned long)pte); |
f88df14b DG |
100 | } |
101 | ||
102 | static inline void pte_free(struct page *ptepage) | |
103 | { | |
517e2263 | 104 | __free_page(ptepage); |
f88df14b DG |
105 | } |
106 | ||
107 | #define PGF_CACHENUM_MASK 0x3 | |
108 | ||
109 | typedef struct pgtable_free { | |
110 | unsigned long val; | |
111 | } pgtable_free_t; | |
112 | ||
113 | static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum, | |
114 | unsigned long mask) | |
115 | { | |
116 | BUG_ON(cachenum > PGF_CACHENUM_MASK); | |
117 | ||
118 | return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum}; | |
119 | } | |
120 | ||
121 | static inline void pgtable_free(pgtable_free_t pgf) | |
122 | { | |
123 | void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK); | |
124 | int cachenum = pgf.val & PGF_CACHENUM_MASK; | |
125 | ||
517e2263 HD |
126 | if (cachenum == PTE_NONCACHE_NUM) |
127 | free_page((unsigned long)p); | |
128 | else | |
129 | kmem_cache_free(pgtable_cache[cachenum], p); | |
f88df14b DG |
130 | } |
131 | ||
132 | extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf); | |
133 | ||
134 | #define __pte_free_tlb(tlb, ptepage) \ | |
135 | pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \ | |
517e2263 | 136 | PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)) |
f88df14b DG |
137 | #define __pmd_free_tlb(tlb, pmd) \ |
138 | pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \ | |
139 | PMD_CACHE_NUM, PMD_TABLE_SIZE-1)) | |
140 | #ifndef CONFIG_PPC_64K_PAGES | |
141 | #define __pud_free_tlb(tlb, pud) \ | |
142 | pgtable_free_tlb(tlb, pgtable_free_cache(pud, \ | |
143 | PUD_CACHE_NUM, PUD_TABLE_SIZE-1)) | |
144 | #endif /* CONFIG_PPC_64K_PAGES */ | |
145 | ||
146 | #define check_pgt_cache() do { } while (0) | |
147 | ||
148 | #endif /* _ASM_POWERPC_PGALLOC_64_H */ |