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