David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 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 | |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 10 | #include <linux/slab.h> |
| 11 | #include <linux/cpumask.h> |
| 12 | #include <linux/percpu.h> |
| 13 | |
Paul Mackerras | fa28237 | 2008-01-24 08:35:13 +1100 | [diff] [blame] | 14 | #ifndef CONFIG_PPC_SUBPAGE_PROT |
| 15 | static inline void subpage_prot_free(pgd_t *pgd) {} |
| 16 | #endif |
| 17 | |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 18 | extern struct kmem_cache *pgtable_cache[]; |
| 19 | |
Hugh Dickins | 517e226 | 2007-05-09 14:38:48 +1000 | [diff] [blame] | 20 | #define PGD_CACHE_NUM 0 |
| 21 | #define PUD_CACHE_NUM 1 |
| 22 | #define PMD_CACHE_NUM 1 |
| 23 | #define HUGEPTE_CACHE_NUM 2 |
Jon Tollefson | 0d9ea75 | 2008-07-23 21:27:56 -0700 | [diff] [blame] | 24 | #define PTE_NONCACHE_NUM 7 /* from GFP rather than kmem_cache */ |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 25 | |
| 26 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
| 27 | { |
| 28 | return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL); |
| 29 | } |
| 30 | |
Benjamin Herrenschmidt | 5e54197 | 2008-02-04 22:29:14 -0800 | [diff] [blame] | 31 | static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 32 | { |
Paul Mackerras | fa28237 | 2008-01-24 08:35:13 +1100 | [diff] [blame] | 33 | subpage_prot_free(pgd); |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 34 | kmem_cache_free(pgtable_cache[PGD_CACHE_NUM], pgd); |
| 35 | } |
| 36 | |
| 37 | #ifndef CONFIG_PPC_64K_PAGES |
| 38 | |
| 39 | #define pgd_populate(MM, PGD, PUD) pgd_set(PGD, PUD) |
| 40 | |
| 41 | static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) |
| 42 | { |
| 43 | return kmem_cache_alloc(pgtable_cache[PUD_CACHE_NUM], |
| 44 | GFP_KERNEL|__GFP_REPEAT); |
| 45 | } |
| 46 | |
Benjamin Herrenschmidt | 5e54197 | 2008-02-04 22:29:14 -0800 | [diff] [blame] | 47 | static inline void pud_free(struct mm_struct *mm, pud_t *pud) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 48 | { |
| 49 | kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud); |
| 50 | } |
| 51 | |
| 52 | static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) |
| 53 | { |
| 54 | pud_set(pud, (unsigned long)pmd); |
| 55 | } |
| 56 | |
| 57 | #define pmd_populate(mm, pmd, pte_page) \ |
| 58 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) |
| 59 | #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte)) |
Martin Schwidefsky | 2f569af | 2008-02-08 04:22:04 -0800 | [diff] [blame] | 60 | #define pmd_pgtable(pmd) pmd_page(pmd) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 61 | |
| 62 | |
| 63 | #else /* CONFIG_PPC_64K_PAGES */ |
| 64 | |
| 65 | #define pud_populate(mm, pud, pmd) pud_set(pud, (unsigned long)pmd) |
| 66 | |
| 67 | static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, |
| 68 | pte_t *pte) |
| 69 | { |
| 70 | pmd_set(pmd, (unsigned long)pte); |
| 71 | } |
| 72 | |
| 73 | #define pmd_populate(mm, pmd, pte_page) \ |
| 74 | pmd_populate_kernel(mm, pmd, page_address(pte_page)) |
Martin Schwidefsky | 2f569af | 2008-02-08 04:22:04 -0800 | [diff] [blame] | 75 | #define pmd_pgtable(pmd) pmd_page(pmd) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 76 | |
| 77 | #endif /* CONFIG_PPC_64K_PAGES */ |
| 78 | |
| 79 | static 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 | |
Benjamin Herrenschmidt | 5e54197 | 2008-02-04 22:29:14 -0800 | [diff] [blame] | 85 | static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 86 | { |
| 87 | kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd); |
| 88 | } |
| 89 | |
| 90 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
| 91 | unsigned long address) |
| 92 | { |
Hugh Dickins | 517e226 | 2007-05-09 14:38:48 +1000 | [diff] [blame] | 93 | return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 94 | } |
| 95 | |
Martin Schwidefsky | 2f569af | 2008-02-08 04:22:04 -0800 | [diff] [blame] | 96 | static inline pgtable_t pte_alloc_one(struct mm_struct *mm, |
| 97 | unsigned long address) |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 98 | { |
Martin Schwidefsky | 2f569af | 2008-02-08 04:22:04 -0800 | [diff] [blame] | 99 | struct page *page; |
| 100 | pte_t *pte; |
| 101 | |
| 102 | pte = pte_alloc_one_kernel(mm, address); |
| 103 | if (!pte) |
| 104 | return NULL; |
| 105 | page = virt_to_page(pte); |
| 106 | pgtable_page_ctor(page); |
| 107 | return page; |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 108 | } |
| 109 | |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 110 | static inline void pgtable_free(pgtable_free_t pgf) |
| 111 | { |
| 112 | void *p = (void *)(pgf.val & ~PGF_CACHENUM_MASK); |
| 113 | int cachenum = pgf.val & PGF_CACHENUM_MASK; |
| 114 | |
Hugh Dickins | 517e226 | 2007-05-09 14:38:48 +1000 | [diff] [blame] | 115 | if (cachenum == PTE_NONCACHE_NUM) |
| 116 | free_page((unsigned long)p); |
| 117 | else |
| 118 | kmem_cache_free(pgtable_cache[cachenum], p); |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 119 | } |
| 120 | |
David Gibson | f88df14 | 2007-04-30 16:30:56 +1000 | [diff] [blame] | 121 | #define __pmd_free_tlb(tlb, pmd) \ |
| 122 | pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \ |
| 123 | PMD_CACHE_NUM, PMD_TABLE_SIZE-1)) |
| 124 | #ifndef CONFIG_PPC_64K_PAGES |
| 125 | #define __pud_free_tlb(tlb, pud) \ |
| 126 | pgtable_free_tlb(tlb, pgtable_free_cache(pud, \ |
| 127 | PUD_CACHE_NUM, PUD_TABLE_SIZE-1)) |
| 128 | #endif /* CONFIG_PPC_64K_PAGES */ |
| 129 | |
| 130 | #define check_pgt_cache() do { } while (0) |
| 131 | |
| 132 | #endif /* _ASM_POWERPC_PGALLOC_64_H */ |