release/src-rt-6.x.4708/linux/linux-2.6.36/arch/um/include/asm/pgalloc.h

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Copyright 2003 PathScale, Inc.
   4  * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
   5  * Licensed under the GPL
   6  */
   7
   8 #ifndef __UM_PGALLOC_H
   9 #define __UM_PGALLOC_H
  10
  11 #include "linux/mm.h"
  12 #include "asm/fixmap.h"
  13
  14 #define pmd_populate_kernel(mm, pmd, pte) \
  15         set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  16
  17 #define pmd_populate(mm, pmd, pte)                              \
  18         set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
  19                 ((unsigned long long)page_to_pfn(pte) <<        \
  20                         (unsigned long long) PAGE_SHIFT)))
  21 #define pmd_pgtable(pmd) pmd_page(pmd)
  22
  23 /*
  24  * Allocate and free page tables.
  25  */
  26 extern pgd_t *pgd_alloc(struct mm_struct *);
  27 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  28
  29 extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  30 extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
  31
  32 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  33 {
  34         free_page((unsigned long) pte);
  35 }
  36
  37 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  38 {
  39         pgtable_page_dtor(pte);
  40         __free_page(pte);
  41 }
  42
  43 #define __pte_free_tlb(tlb,pte, address)                \
  44 do {                                                    \
  45         pgtable_page_dtor(pte);                         \
  46         tlb_remove_page((tlb),(pte));                   \
  47 } while (0)
  48
  49 #ifdef CONFIG_3_LEVEL_PGTABLES
  50
  51 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  52 {
  53         free_page((unsigned long)pmd);
  54 }
  55
  56 #define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
  57 #endif
  58
  59 #define check_pgt_cache()       do { } while (0)
  60
  61 #endif