release/src-rt-6.x/linux/linux-2.6/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
  11 static __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  */
  20 static __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
  27 static __inline__ void pgd_free(pgd_t *pgd)
  28 {
  29         free_page((unsigned long)pgd);
  30 }
  31
  32 static __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
  40 static __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
  49 static __inline__ void pte_free_kernel(pte_t *pte)
  50 {
  51         free_page((unsigned long)pte);
  52 }
  53
  54 static __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 */