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