release/src-rt-6.x/linux/linux-2.6/include/asm-alpha/pgalloc.h

   1 #ifndef _ALPHA_PGALLOC_H
   2 #define _ALPHA_PGALLOC_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/mmzone.h>
   6
   7 /*
   8  * Allocate and free page tables. The xxx_kernel() versions are
   9  * used to allocate a kernel page table - this turns on ASN bits
  10  * if any.
  11  */
  12
  13 static inline void
  14 pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
  15 {
  16         pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
  17 }
  18
  19 static inline void
  20 pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
  21 {
  22         pmd_set(pmd, pte);
  23 }
  24
  25 static inline void
  26 pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
  27 {
  28         pgd_set(pgd, pmd);
  29 }
  30
  31 extern pgd_t *pgd_alloc(struct mm_struct *mm);
  32
  33 static inline void
  34 pgd_free(pgd_t *pgd)
  35 {
  36         free_page((unsigned long)pgd);
  37 }
  38
  39 static inline pmd_t *
  40 pmd_alloc_one(struct mm_struct *mm, unsigned long address)
  41 {
  42         pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
  43         return ret;
  44 }
  45
  46 static inline void
  47 pmd_free(pmd_t *pmd)
  48 {
  49         free_page((unsigned long)pmd);
  50 }
  51
  52 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
  53
  54 static inline void
  55 pte_free_kernel(pte_t *pte)
  56 {
  57         free_page((unsigned long)pte);
  58 }
  59
  60 static inline struct page *
  61 pte_alloc_one(struct mm_struct *mm, unsigned long addr)
  62 {
  63         pte_t *pte = pte_alloc_one_kernel(mm, addr);
  64         if (pte)
  65                 return virt_to_page(pte);
  66         return NULL;
  67 }
  68
  69 static inline void
  70 pte_free(struct page *page)
  71 {
  72         __free_page(page);
  73 }
  74
  75 #define check_pgt_cache()       do { } while (0)
  76
  77 #endif /* _ALPHA_PGALLOC_H */