ae63db7b3e7d724af37878901a079a97167ab68c
[linux-3.10.git] / include / asm-powerpc / pgalloc.h
1 #ifndef _ASM_POWERPC_PGALLOC_H
2 #define _ASM_POWERPC_PGALLOC_H
3 #ifdef __KERNEL__
4
5 #ifndef CONFIG_PPC64
6 #include <asm-ppc/pgalloc.h>
7 #else
8
9 #include <linux/mm.h>
10 #include <linux/slab.h>
11 #include <linux/cpumask.h>
12 #include <linux/percpu.h>
13
14 extern kmem_cache_t *pgtable_cache[];
15
16 #ifdef CONFIG_PPC_64K_PAGES
17 #define PTE_CACHE_NUM   0
18 #define PMD_CACHE_NUM   1
19 #define PGD_CACHE_NUM   2
20 #define HUGEPTE_CACHE_NUM 3
21 #else
22 #define PTE_CACHE_NUM   0
23 #define PMD_CACHE_NUM   1
24 #define PUD_CACHE_NUM   1
25 #define PGD_CACHE_NUM   0
26 #define HUGEPTE_CACHE_NUM 2
27 #endif
28
29 /*
30  * This program is free software; you can redistribute it and/or
31  * modify it under the terms of the GNU General Public License
32  * as published by the Free Software Foundation; either version
33  * 2 of the License, or (at your option) any later version.
34  */
35
36 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
37 {
38         return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
39 }
40
41 static inline void pgd_free(pgd_t *pgd)
42 {
43         kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
44 }
45
46 #ifndef CONFIG_PPC_64K_PAGES
47
48 #define pgd_populate(MM, PGD, PUD)      pgd_set(PGD, PUD)
49
50 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
51 {
52         return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
53                                 GFP_KERNEL|__GFP_REPEAT);
54 }
55
56 static inline void pud_free(pud_t *pud)
57 {
58         kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
59 }
60
61 static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
62 {
63         pud_set(pud, (unsigned long)pmd);
64 }
65
66 #define pmd_populate(mm, pmd, pte_page) \
67         pmd_populate_kernel(mm, pmd, page_address(pte_page))
68 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
69
70
71 #else /* CONFIG_PPC_64K_PAGES */
72
73 #define pud_populate(mm, pud, pmd)      pud_set(pud, (unsigned long)pmd)
74
75 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
76                                        pte_t *pte)
77 {
78         pmd_set(pmd, (unsigned long)pte);
79 }
80
81 #define pmd_populate(mm, pmd, pte_page) \
82         pmd_populate_kernel(mm, pmd, page_address(pte_page))
83
84 #endif /* CONFIG_PPC_64K_PAGES */
85
86 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
87 {
88         return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
89                                 GFP_KERNEL|__GFP_REPEAT);
90 }
91
92 static inline void pmd_free(pmd_t *pmd)
93 {
94         kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
95 }
96
97 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
98                                           unsigned long address)
99 {
100         return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
101                                 GFP_KERNEL|__GFP_REPEAT);
102 }
103
104 static inline struct page *pte_alloc_one(struct mm_struct *mm,
105                                          unsigned long address)
106 {
107         return virt_to_page(pte_alloc_one_kernel(mm, address));
108 }
109                 
110 static inline void pte_free_kernel(pte_t *pte)
111 {
112         kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
113 }
114
115 static inline void pte_free(struct page *ptepage)
116 {
117         pte_free_kernel(page_address(ptepage));
118 }
119
120 #define PGF_CACHENUM_MASK       0x3
121
122 typedef struct pgtable_free {
123         unsigned long val;
124 } pgtable_free_t;
125
126 static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
127                                                 unsigned long mask)
128 {
129         BUG_ON(cachenum > PGF_CACHENUM_MASK);
130
131         return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
132 }
133
134 static inline void pgtable_free(pgtable_free_t pgf)
135 {
136         void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
137         int cachenum = pgf.val & PGF_CACHENUM_MASK;
138
139         kmem_cache_free(pgtable_cache[cachenum], p);
140 }
141
142 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
143
144 #define __pte_free_tlb(tlb, ptepage)    \
145         pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
146                 PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
147 #define __pmd_free_tlb(tlb, pmd)        \
148         pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
149                 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
150 #ifndef CONFIG_PPC_64K_PAGES
151 #define __pud_free_tlb(tlb, pud)        \
152         pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
153                 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
154 #endif /* CONFIG_PPC_64K_PAGES */
155
156 #define check_pgt_cache()       do { } while (0)
157
158 #endif /* CONFIG_PPC64 */
159 #endif /* __KERNEL__ */
160 #endif /* _ASM_POWERPC_PGALLOC_H */