arch/sh/include/asm/pgalloc.h

   1 #ifndef __ASM_SH_PGALLOC_H
   2 #define __ASM_SH_PGALLOC_H
   3
   4 #include <linux/quicklist.h>
   5 #include <asm/page.h>
   6
   7 #define QUICK_PT 1      /* Other page table pages that are zero on free */
   8
   9 #ifdef CONFIG_PGTABLE_LEVELS_3
  10 #include <asm/pgalloc_pmd.h>
  11 #else
  12 #include <asm/pgalloc_nopmd.h>
  13 #endif
  14
  15 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
  16                                        pte_t *pte)
  17 {
  18         set_pmd(pmd, __pmd((unsigned long)pte));
  19 }
  20
  21 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  22                                 pgtable_t pte)
  23 {
  24         set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
  25 }
  26 #define pmd_pgtable(pmd) pmd_page(pmd)
  27
  28 /*
  29  * Allocate and free page tables.
  30  */
  31 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
  32                                           unsigned long address)
  33 {
  34         return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
  35 }
  36
  37 static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
  38                                         unsigned long address)
  39 {
  40         struct page *page;
  41         void *pg;
  42
  43         pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
  44         if (!pg)
  45                 return NULL;
  46         page = virt_to_page(pg);
  47         pgtable_page_ctor(page);
  48         return page;
  49 }
  50
  51 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  52 {
  53         quicklist_free(QUICK_PT, NULL, pte);
  54 }
  55
  56 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  57 {
  58         pgtable_page_dtor(pte);
  59         quicklist_free_page(QUICK_PT, NULL, pte);
  60 }
  61
  62 #define __pte_free_tlb(tlb,pte,addr)                    \
  63 do {                                                    \
  64         pgtable_page_dtor(pte);                         \
  65         tlb_remove_page((tlb), (pte));                  \
  66 } while (0)
  67
  68 static inline void check_pgt_cache(void)
  69 {
  70         __check_pgt_cache();
  71         quicklist_trim(QUICK_PT, NULL, 25, 16);
  72 }
  73
  74 #endif /* __ASM_SH_PGALLOC_H */