include/asm-m32r/pgalloc.h

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