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1da177e4 LT |
1 | #ifndef _PPC64_PGALLOC_H |
2 | #define _PPC64_PGALLOC_H | |
3 | ||
4 | #include <linux/mm.h> | |
5 | #include <linux/slab.h> | |
6 | #include <linux/cpumask.h> | |
7 | #include <linux/percpu.h> | |
8 | ||
e28f7faf DG |
9 | extern kmem_cache_t *pgtable_cache[]; |
10 | ||
11 | #define PTE_CACHE_NUM 0 | |
12 | #define PMD_CACHE_NUM 1 | |
13 | #define PUD_CACHE_NUM 1 | |
14 | #define PGD_CACHE_NUM 0 | |
1da177e4 LT |
15 | |
16 | /* | |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License | |
19 | * as published by the Free Software Foundation; either version | |
20 | * 2 of the License, or (at your option) any later version. | |
21 | */ | |
22 | ||
e28f7faf | 23 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
1da177e4 | 24 | { |
e28f7faf | 25 | return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL); |
1da177e4 LT |
26 | } |
27 | ||
e28f7faf | 28 | static inline void pgd_free(pgd_t *pgd) |
1da177e4 | 29 | { |
e28f7faf DG |
30 | kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd); |
31 | } | |
32 | ||
33 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD) | |
34 | ||
35 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) | |
36 | { | |
37 | return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM], | |
38 | GFP_KERNEL|__GFP_REPEAT); | |
39 | } | |
40 | ||
41 | static inline void pud_free(pud_t *pud) | |
42 | { | |
43 | kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud); | |
1da177e4 LT |
44 | } |
45 | ||
58366af5 | 46 | #define pud_populate(MM, PUD, PMD) pud_set(PUD, PMD) |
1da177e4 | 47 | |
e28f7faf | 48 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) |
1da177e4 | 49 | { |
e28f7faf DG |
50 | return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM], |
51 | GFP_KERNEL|__GFP_REPEAT); | |
1da177e4 LT |
52 | } |
53 | ||
e28f7faf | 54 | static inline void pmd_free(pmd_t *pmd) |
1da177e4 | 55 | { |
e28f7faf | 56 | kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd); |
1da177e4 LT |
57 | } |
58 | ||
59 | #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte) | |
60 | #define pmd_populate(mm, pmd, pte_page) \ | |
61 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) | |
62 | ||
63 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) | |
64 | { | |
e28f7faf DG |
65 | return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM], |
66 | GFP_KERNEL|__GFP_REPEAT); | |
1da177e4 LT |
67 | } |
68 | ||
69 | static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address) | |
70 | { | |
e28f7faf | 71 | return virt_to_page(pte_alloc_one_kernel(mm, address)); |
1da177e4 LT |
72 | } |
73 | ||
74 | static inline void pte_free_kernel(pte_t *pte) | |
75 | { | |
e28f7faf | 76 | kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte); |
1da177e4 LT |
77 | } |
78 | ||
79 | static inline void pte_free(struct page *ptepage) | |
80 | { | |
e28f7faf | 81 | pte_free_kernel(page_address(ptepage)); |
1da177e4 LT |
82 | } |
83 | ||
e28f7faf DG |
84 | #define PGF_CACHENUM_MASK 0xf |
85 | ||
86 | typedef struct pgtable_free { | |
87 | unsigned long val; | |
88 | } pgtable_free_t; | |
89 | ||
90 | static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum, | |
91 | unsigned long mask) | |
1da177e4 | 92 | { |
e28f7faf | 93 | BUG_ON(cachenum > PGF_CACHENUM_MASK); |
1da177e4 | 94 | |
e28f7faf DG |
95 | return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum}; |
96 | } | |
1da177e4 | 97 | |
e28f7faf DG |
98 | static inline void pgtable_free(pgtable_free_t pgf) |
99 | { | |
100 | void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK); | |
101 | int cachenum = pgf.val & PGF_CACHENUM_MASK; | |
1da177e4 | 102 | |
e28f7faf DG |
103 | kmem_cache_free(pgtable_cache[cachenum], p); |
104 | } | |
1da177e4 | 105 | |
e28f7faf DG |
106 | void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf); |
107 | ||
108 | #define __pte_free_tlb(tlb, ptepage) \ | |
109 | pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \ | |
110 | PTE_CACHE_NUM, PTE_TABLE_SIZE-1)) | |
111 | #define __pmd_free_tlb(tlb, pmd) \ | |
112 | pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \ | |
113 | PMD_CACHE_NUM, PMD_TABLE_SIZE-1)) | |
114 | #define __pud_free_tlb(tlb, pmd) \ | |
115 | pgtable_free_tlb(tlb, pgtable_free_cache(pud, \ | |
116 | PUD_CACHE_NUM, PUD_TABLE_SIZE-1)) | |
1da177e4 LT |
117 | |
118 | #define check_pgt_cache() do { } while (0) | |
119 | ||
120 | #endif /* _PPC64_PGALLOC_H */ |