LXR linux/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
  11static __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 */
  21static __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
  28static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  29{
  30        free_page((unsigned long)pgd);
  31}
  32
  33static __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
  41static __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        pgtable_page_ctor(pte);
  47        return pte;
  48}
  49
  50static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  51{
  52        free_page((unsigned long)pte);
  53}
  54
  55static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  56{
  57        pgtable_page_dtor(pte);
  58        __free_page(pte);
  59}
  60
  61#define __pte_free_tlb(tlb, pte, addr)  pte_free((tlb)->mm, (pte))
  62
  63/*
  64 * allocating and freeing a pmd is trivial: the 1-entry pmd is
  65 * inside the pgd, so has no extra memory associated with it.
  66 * (In the PAE case we free the pmds as part of the pgd.)
  67 */
  68
  69#define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  70#define pmd_free(mm, x)                 do { } while (0)
  71#define __pmd_free_tlb(tlb, x, addr)    do { } while (0)
  72#define pgd_populate(mm, pmd, pte)      BUG()
  73
  74#define check_pgt_cache()       do { } while (0)
  75
  76#endif /* _ASM_M32R_PGALLOC_H */
  77