blob: 94d0294341d65a90006669e2a9bfd7851ab37452 [file] [log] [blame]
David Gibsonf88df142007-04-30 16:30:56 +10001#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
15extern struct kmem_cache *pgtable_cache[];
16
Hugh Dickins517e2262007-05-09 14:38:48 +100017#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 */
David Gibsonf88df142007-04-30 16:30:56 +100022
23static inline pgd_t *pgd_alloc(struct mm_struct *mm)
24{
25 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
26}
27
28static 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
37static 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
43static inline void pud_free(pud_t *pud)
44{
45 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
46}
47
48static 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
62static 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
73static 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
79static inline void pmd_free(pmd_t *pmd)
80{
81 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
82}
83
84static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
85 unsigned long address)
86{
Hugh Dickins517e2262007-05-09 14:38:48 +100087 return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
David Gibsonf88df142007-04-30 16:30:56 +100088}
89
90static inline struct page *pte_alloc_one(struct mm_struct *mm,
91 unsigned long address)
92{
Akinobu Mitaa4c28ab2007-05-29 20:46:51 +100093 pte_t *pte = pte_alloc_one_kernel(mm, address);
94 return pte ? virt_to_page(pte) : NULL;
David Gibsonf88df142007-04-30 16:30:56 +100095}
96
97static inline void pte_free_kernel(pte_t *pte)
98{
Hugh Dickins517e2262007-05-09 14:38:48 +100099 free_page((unsigned long)pte);
David Gibsonf88df142007-04-30 16:30:56 +1000100}
101
102static inline void pte_free(struct page *ptepage)
103{
Hugh Dickins517e2262007-05-09 14:38:48 +1000104 __free_page(ptepage);
David Gibsonf88df142007-04-30 16:30:56 +1000105}
106
107#define PGF_CACHENUM_MASK 0x3
108
109typedef struct pgtable_free {
110 unsigned long val;
111} pgtable_free_t;
112
113static 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
121static 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
Hugh Dickins517e2262007-05-09 14:38:48 +1000126 if (cachenum == PTE_NONCACHE_NUM)
127 free_page((unsigned long)p);
128 else
129 kmem_cache_free(pgtable_cache[cachenum], p);
David Gibsonf88df142007-04-30 16:30:56 +1000130}
131
132extern 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), \
Hugh Dickins517e2262007-05-09 14:38:48 +1000136 PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1))
David Gibsonf88df142007-04-30 16:30:56 +1000137#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 */