arch/score/include/asm/pgalloc.h

   1 #ifndef _ASM_SCORE_PGALLOC_H
   2 #define _ASM_SCORE_PGALLOC_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/highmem.h>
   6 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
   7         pte_t *pte)
   8 {
   9         set_pmd(pmd, __pmd((unsigned long)pte));
  10 }
  11
  12 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  13         pgtable_t pte)
  14 {
  15         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  16 }
  17
  18 #define pmd_pgtable(pmd)        pmd_page(pmd)
  19
  20 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
  21 {
  22         pgd_t *ret, *init;
  23
  24         ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
  25         if (ret) {
  26                 init = pgd_offset(&init_mm, 0UL);
  27                 pgd_init((unsigned long)ret);
  28                 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
  29                 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
  30         }
  31
  32         return ret;
  33 }
  34
  35 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
  36 {
  37         free_pages((unsigned long)pgd, PGD_ORDER);
  38 }
  39
  40 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  41         unsigned long address)
  42 {
  43         pte_t *pte;
  44
  45         pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER);
  46
  47         return pte;
  48 }
  49
  50 static inline struct page *pte_alloc_one(struct mm_struct *mm,
  51         unsigned long address)
  52 {
  53         struct page *pte;
  54
  55         pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
  56         if (!pte)
  57                 return NULL;
  58         clear_highpage(pte);
  59         if (!pgtable_page_ctor(pte)) {
  60                 __free_page(pte);
  61                 return NULL;
  62         }
  63         return pte;
  64 }
  65
  66 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  67 {
  68         free_pages((unsigned long)pte, PTE_ORDER);
  69 }
  70
  71 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  72 {
  73         pgtable_page_dtor(pte);
  74         __free_pages(pte, PTE_ORDER);
  75 }
  76
  77 #define __pte_free_tlb(tlb, pte, buf)                   \
  78 do {                                                    \
  79         pgtable_page_dtor(pte);                         \
  80         tlb_remove_page((tlb), pte);                    \
  81 } while (0)
  82
  83 #define check_pgt_cache()               do {} while (0)
  84
  85 #endif /* _ASM_SCORE_PGALLOC_H */