include/asm-um/pgalloc.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
   4  * Licensed under the GPL
   5  */
   6
   7 #ifndef __UM_PGALLOC_H
   8 #define __UM_PGALLOC_H
   9
  10 #include "linux/mm.h"
  11 #include "asm/fixmap.h"
  12
  13 #define pmd_populate_kernel(mm, pmd, pte) \
  14                 set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  15
  16 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
  17                                 struct page *pte)
  18 {
  19         set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
  20 }
  21
  22 extern pgd_t *pgd_alloc(struct mm_struct *);
  23 extern void pgd_free(pgd_t *pgd);
  24
  25 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  26 extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  27
  28 static inline void pte_free_kernel(pte_t *pte)
  29 {
  30         free_page((unsigned long) pte);
  31 }
  32
  33 static inline void pte_free(struct page *pte)
  34 {
  35         __free_page(pte);
  36 }
  37
  38 #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
  39
  40 /*
  41  * allocating and freeing a pmd is trivial: the 1-entry pmd is
  42  * inside the pgd, so has no extra memory associated with it.
  43  */
  44
  45 #define pmd_alloc_one(mm, addr)         ({ BUG(); ((pmd_t *)2); })
  46 #define pmd_free(x)                     do { } while (0)
  47 #define __pmd_free_tlb(tlb,x)           do { } while (0)
  48 #define pgd_populate(mm, pmd, pte)      BUG()
  49
  50 #define check_pgt_cache()       do { } while (0)
  51
  52 #endif
  53
  54 /*
  55  * Overrides for Emacs so that we follow Linus's tabbing style.
  56  * Emacs will notice this stuff at the end of the file and automatically
  57  * adjust the settings for this buffer only.  This must remain at the end
  58  * of the file.
  59  * ---------------------------------------------------------------------------
  60  * Local variables:
  61  * c-file-style: "linux"
  62  * End:
  63  */