include/asm-sh/pgalloc.h

   1 #ifndef __ASM_SH_PGALLOC_H
   2 #define __ASM_SH_PGALLOC_H
   3
   4 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
   5                                        pte_t *pte)
   6 {
   7         set_pmd(pmd, __pmd((unsigned long)pte));
   8 }
   9
  10 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  11                                 struct page *pte)
  12 {
  13         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  14 }
  15
  16 /*
  17  * Allocate and free page tables.
  18  */
  19 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  20 {
  21         pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT);
  22
  23         if (pgd) {
  24                 memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
  25                 memcpy(pgd + USER_PTRS_PER_PGD,
  26                        swapper_pg_dir + USER_PTRS_PER_PGD,
  27                        (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
  28         }
  29
  30         return pgd;
  31 }
  32
  33 static inline void pgd_free(pgd_t *pgd)
  34 {
  35         free_page((unsigned long)pgd);
  36 }
  37
  38 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  39                                           unsigned long address)
  40 {
  41         return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
  42 }
  43
  44 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  45                                          unsigned long address)
  46 {
  47         return alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
  48 }
  49
  50 static inline void pte_free_kernel(pte_t *pte)
  51 {
  52         free_page((unsigned long)pte);
  53 }
  54
  55 static inline void pte_free(struct page *pte)
  56 {
  57         __free_page(pte);
  58 }
  59
  60 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  61
  62 /*
  63  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  64  * inside the pgd, so has no extra memory associated with it.
  65  */
  66
  67 #define pmd_free(x)                     do { } while (0)
  68 #define __pmd_free_tlb(tlb,x)           do { } while (0)
  69 #define check_pgt_cache()               do { } while (0)
  70
  71 #endif /* __ASM_SH_PGALLOC_H */