Linux kernel mirror (for testing)
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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
15extern struct kmem_cache *pgtable_cache[];
16
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 */
22
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{
87 return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
88}
89
90static inline struct page *pte_alloc_one(struct mm_struct *mm,
91 unsigned long address)
92{
93 return virt_to_page(pte_alloc_one_kernel(mm, address));
94}
95
96static inline void pte_free_kernel(pte_t *pte)
97{
98 free_page((unsigned long)pte);
99}
100
101static inline void pte_free(struct page *ptepage)
102{
103 __free_page(ptepage);
104}
105
106#define PGF_CACHENUM_MASK 0x3
107
108typedef struct pgtable_free {
109 unsigned long val;
110} pgtable_free_t;
111
112static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
113 unsigned long mask)
114{
115 BUG_ON(cachenum > PGF_CACHENUM_MASK);
116
117 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
118}
119
120static inline void pgtable_free(pgtable_free_t pgf)
121{
122 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
123 int cachenum = pgf.val & PGF_CACHENUM_MASK;
124
125 if (cachenum == PTE_NONCACHE_NUM)
126 free_page((unsigned long)p);
127 else
128 kmem_cache_free(pgtable_cache[cachenum], p);
129}
130
131extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
132
133#define __pte_free_tlb(tlb, ptepage) \
134 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
135 PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1))
136#define __pmd_free_tlb(tlb, pmd) \
137 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
138 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
139#ifndef CONFIG_PPC_64K_PAGES
140#define __pud_free_tlb(tlb, pud) \
141 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
142 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
143#endif /* CONFIG_PPC_64K_PAGES */
144
145#define check_pgt_cache() do { } while (0)
146
147#endif /* _ASM_POWERPC_PGALLOC_64_H */