LXR linux/include/asm-m32r/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        struct page *pte)
  13{
  14        set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
  15}
  16
  17/*
  18 * Allocate and free page tables.
  19 */
  20static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
  21{
  22        pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  23
  24        return pgd;
  25}
  26
  27static __inline__ void pgd_free(pgd_t *pgd)
  28{
  29        free_page((unsigned long)pgd);
  30}
  31
  32static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  33        unsigned long address)
  34{
  35        pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
  36
  37        return pte;
  38}
  39
  40static __inline__ struct page *pte_alloc_one(struct mm_struct *mm,
  41        unsigned long address)
  42{
  43        struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
  44
  45
  46        return pte;
  47}
  48
  49static __inline__ void pte_free_kernel(pte_t *pte)
  50{
  51        free_page((unsigned long)pte);
  52}
  53
  54static __inline__ void pte_free(struct page *pte)
  55{
  56        __free_page(pte);
  57}
  58
  59#define __pte_free_tlb(tlb, pte)        pte_free((pte))
  60
  61/*
  62 * allocating and freeing a pmd is trivial: the 1-entry pmd is
  63 * inside the pgd, so has no extra memory associated with it.
  64 * (In the PAE case we free the pmds as part of the pgd.)
  65 */
  66
  67#define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  68#define pmd_free(x)                     do { } while (0)
  69#define __pmd_free_tlb(tlb, x)          do { } while (0)
  70#define pgd_populate(mm, pmd, pte)      BUG()
  71
  72#define check_pgt_cache()       do { } while (0)
  73
  74#endif /* _ASM_M32R_PGALLOC_H */
  75