arch/m68k/include/asm/motorola_pgalloc.h

   1 #ifndef _MOTOROLA_PGALLOC_H
   2 #define _MOTOROLA_PGALLOC_H
   3
   4 #include <asm/tlb.h>
   5 #include <asm/tlbflush.h>
   6
   7 extern pmd_t *get_pointer_table(void);
   8 extern int free_pointer_table(pmd_t *);
   9
  10 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
  11 {
  12         pte_t *pte;
  13
  14         pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  15         if (pte) {
  16                 __flush_page_to_ram(pte);
  17                 flush_tlb_kernel_page(pte);
  18                 nocache_page(pte);
  19         }
  20
  21         return pte;
  22 }
  23
  24 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  25 {
  26         cache_page(pte);
  27         free_page((unsigned long) pte);
  28 }
  29
  30 static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
  31 {
  32         struct page *page;
  33         pte_t *pte;
  34
  35         page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
  36         if(!page)
  37                 return NULL;
  38         if (!pgtable_page_ctor(page)) {
  39                 __free_page(page);
  40                 return NULL;
  41         }
  42
  43         pte = kmap(page);
  44         __flush_page_to_ram(pte);
  45         flush_tlb_kernel_page(pte);
  46         nocache_page(pte);
  47         kunmap(page);
  48         return page;
  49 }
  50
  51 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
  52 {
  53         pgtable_page_dtor(page);
  54         cache_page(kmap(page));
  55         kunmap(page);
  56         __free_page(page);
  57 }
  58
  59 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
  60                                   unsigned long address)
  61 {
  62         pgtable_page_dtor(page);
  63         cache_page(kmap(page));
  64         kunmap(page);
  65         __free_page(page);
  66 }
  67
  68
  69 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
  70 {
  71         return get_pointer_table();
  72 }
  73
  74 static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
  75 {
  76         return free_pointer_table(pmd);
  77 }
  78
  79 static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
  80                                  unsigned long address)
  81 {
  82         return free_pointer_table(pmd);
  83 }
  84
  85
  86 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  87 {
  88         pmd_free(mm, (pmd_t *)pgd);
  89 }
  90
  91 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  92 {
  93         return (pgd_t *)get_pointer_table();
  94 }
  95
  96
  97 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
  98 {
  99         pmd_set(pmd, pte);
 100 }
 101
 102 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
 103 {
 104         pmd_set(pmd, page_address(page));
 105 }
 106 #define pmd_pgtable(pmd) pmd_page(pmd)
 107
 108 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
 109 {
 110         pgd_set(pgd, pmd);
 111 }
 112
 113 #endif /* _MOTOROLA_PGALLOC_H */