include/asm-i386/pgalloc.h

   1 #ifndef _I386_PGALLOC_H
   2 #define _I386_PGALLOC_H
   3
   4 #include <linux/config.h>
   5 #include <asm/processor.h>
   6 #include <asm/fixmap.h>
   7 #include <linux/threads.h>
   8 #include <linux/mm.h>           /* for struct page */
   9
  10 #define pmd_populate_kernel(mm, pmd, pte) \
  11                 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
  12
  13 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
  14 {
  15         set_pmd(pmd, __pmd(_PAGE_TABLE +
  16                 ((unsigned long long)page_to_pfn(pte) <<
  17                         (unsigned long long) PAGE_SHIFT)));
  18 }
  19 /*
  20  * Allocate and free page tables.
  21  */
  22
  23 extern pgd_t *pgd_alloc(struct mm_struct *);
  24 extern void pgd_free(pgd_t *pgd);
  25
  26 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  27 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  28
  29 static inline void pte_free_kernel(pte_t *pte)
  30 {
  31         free_page((unsigned long)pte);
  32 }
  33
  34 static inline void pte_free(struct page *pte)
  35 {
  36         __free_page(pte);
  37 }
  38
  39
  40 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  41
  42 /*
  43  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  44  * inside the pgd, so has no extra memory associated with it.
  45  * (In the PAE case we free the pmds as part of the pgd.)
  46  */
  47
  48 #define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  49 #define pmd_free(x)                     do { } while (0)
  50 #define __pmd_free_tlb(tlb,x)           do { } while (0)
  51 #define pgd_populate(mm, pmd, pte)      BUG()
  52
  53 #define check_pgt_cache()       do { } while (0)
  54
  55 #endif /* _I386_PGALLOC_H */