arch/m32r/include/asm/pgalloc.h

   1 #ifndef _ASM_M32R_PGALLOC_H
   2 #define _ASM_M32R_PGALLOC_H
   3
   4 #include <linux/mm.h>
   5
   6 #include <asm/io.h>
   7
   8 #define pmd_populate_kernel(mm, pmd, pte)       \
   9         set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
  10
  11 static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  12         pgtable_t pte)
  13 {
  14         set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
  15 }
  16 #define pmd_pgtable(pmd) pmd_page(pmd)
  17
  18 /*
  19  * Allocate and free page tables.
  20  */
  21 static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
  22 {
  23         pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  24
  25         return pgd;
  26 }
  27
  28 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  29 {
  30         free_page((unsigned long)pgd);
  31 }
  32
  33 static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  34         unsigned long address)
  35 {
  36         pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  37
  38         return pte;
  39 }
  40
  41 static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
  42         unsigned long address)
  43 {
  44         struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
  45
  46         if (!pte)
  47                 return NULL;
  48         if (!pgtable_page_ctor(pte)) {
  49                 __free_page(pte);
  50                 return NULL;
  51         }
  52         return pte;
  53 }
  54
  55 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  56 {
  57         free_page((unsigned long)pte);
  58 }
  59
  60 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  61 {
  62         pgtable_page_dtor(pte);
  63         __free_page(pte);
  64 }
  65
  66 #define __pte_free_tlb(tlb, pte, addr)  pte_free((tlb)->mm, (pte))
  67
  68 /*
  69  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  70  * inside the pgd, so has no extra memory associated with it.
  71  * (In the PAE case we free the pmds as part of the pgd.)
  72  */
  73
  74 #define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  75 #define pmd_free(mm, x)                 do { } while (0)
  76 #define __pmd_free_tlb(tlb, x, addr)    do { } while (0)
  77 #define pgd_populate(mm, pmd, pte)      BUG()
  78
  79 #define check_pgt_cache()       do { } while (0)
  80
  81 #endif /* _ASM_M32R_PGALLOC_H */