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Linux kernel mirror (for testing)
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kernel
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linux
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
9extern kmem_cache_t *pgtable_cache[];
10
11#ifdef CONFIG_PPC_64K_PAGES
12#define PTE_CACHE_NUM 0
13#define PMD_CACHE_NUM 1
14#define PGD_CACHE_NUM 2
15#else
16#define PTE_CACHE_NUM 0
17#define PMD_CACHE_NUM 1
18#define PUD_CACHE_NUM 1
19#define PGD_CACHE_NUM 0
20#endif
21
22/*
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public License
25 * as published by the Free Software Foundation; either version
26 * 2 of the License, or (at your option) any later version.
27 */
28
29static inline pgd_t *pgd_alloc(struct mm_struct *mm)
30{
31 return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
32}
33
34static inline void pgd_free(pgd_t *pgd)
35{
36 kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd);
37}
38
39#ifndef CONFIG_PPC_64K_PAGES
40
41#define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD)
42
43static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
44{
45 return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM],
46 GFP_KERNEL|__GFP_REPEAT);
47}
48
49static inline void pud_free(pud_t *pud)
50{
51 kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
52}
53
54static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
55{
56 pud_set(pud, (unsigned long)pmd);
57}
58
59#define pmd_populate(mm, pmd, pte_page) \
60 pmd_populate_kernel(mm, pmd, page_address(pte_page))
61#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
62
63
64#else /* CONFIG_PPC_64K_PAGES */
65
66#define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd)
67
68static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
69 pte_t *pte)
70{
71 pmd_set(pmd, (unsigned long)pte);
72}
73
74#define pmd_populate(mm, pmd, pte_page) \
75 pmd_populate_kernel(mm, pmd, page_address(pte_page))
76
77#endif /* CONFIG_PPC_64K_PAGES */
78
79static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
80{
81 return kmem_cache_alloc(pgtable_cache[PMD_CACHE_NUM],
82 GFP_KERNEL|__GFP_REPEAT);
83}
84
85static inline void pmd_free(pmd_t *pmd)
86{
87 kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
88}
89
90static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
91 unsigned long address)
92{
93 return kmem_cache_alloc(pgtable_cache[PTE_CACHE_NUM],
94 GFP_KERNEL|__GFP_REPEAT);
95}
96
97static inline struct page *pte_alloc_one(struct mm_struct *mm,
98 unsigned long address)
99{
100 return virt_to_page(pte_alloc_one_kernel(mm, address));
101}
102
103static inline void pte_free_kernel(pte_t *pte)
104{
105 kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
106}
107
108static inline void pte_free(struct page *ptepage)
109{
110 pte_free_kernel(page_address(ptepage));
111}
112
113#define PGF_CACHENUM_MASK 0xf
114
115typedef struct pgtable_free {
116 unsigned long val;
117} pgtable_free_t;
118
119static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
120 unsigned long mask)
121{
122 BUG_ON(cachenum > PGF_CACHENUM_MASK);
123
124 return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
125}
126
127static inline void pgtable_free(pgtable_free_t pgf)
128{
129 void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK);
130 int cachenum = pgf.val & PGF_CACHENUM_MASK;
131
132 kmem_cache_free(pgtable_cache[cachenum], p);
133}
134
135extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
136
137#define __pte_free_tlb(tlb, ptepage) \
138 pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
139 PTE_CACHE_NUM, PTE_TABLE_SIZE-1))
140#define __pmd_free_tlb(tlb, pmd) \
141 pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
142 PMD_CACHE_NUM, PMD_TABLE_SIZE-1))
143#ifndef CONFIG_PPC_64K_PAGES
144#define __pud_free_tlb(tlb, pmd) \
145 pgtable_free_tlb(tlb, pgtable_free_cache(pud, \
146 PUD_CACHE_NUM, PUD_TABLE_SIZE-1))
147#endif /* CONFIG_PPC_64K_PAGES */
148
149#define check_pgt_cache() do { } while (0)
150
151#endif /* _PPC64_PGALLOC_H */