include/asm-powerpc/pgalloc.h

   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
  13 extern 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
  33 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  34 {
  35         return kmem_cache_alloc(pgtable_cache[PGD_CACHE_NUM], GFP_KERNEL);
  36 }
  37
  38 static 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
  47 static 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
  53 static inline void pud_free(pud_t *pud)
  54 {
  55         kmem_cache_free(pgtable_cache[PUD_CACHE_NUM], pud);
  56 }
  57
  58 static 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
  72 static 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
  83 static 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
  89 static inline void pmd_free(pmd_t *pmd)
  90 {
  91         kmem_cache_free(pgtable_cache[PMD_CACHE_NUM], pmd);
  92 }
  93
  94 static 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
 101 static 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
 107 static inline void pte_free_kernel(pte_t *pte)
 108 {
 109         kmem_cache_free(pgtable_cache[PTE_CACHE_NUM], pte);
 110 }
 111
 112 static inline void pte_free(struct page *ptepage)
 113 {
 114         pte_free_kernel(page_address(ptepage));
 115 }
 116
 117 #define PGF_CACHENUM_MASK       0xf
 118
 119 typedef struct pgtable_free {
 120         unsigned long val;
 121 } pgtable_free_t;
 122
 123 static 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
 131 static 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
 139 extern 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 */