LXR linux/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
  13#define pmd_populate_kernel(mm, pmd, pte) \
  14        set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
  15
  16#define pmd_populate(mm, pmd, pte)                              \
  17        set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
  18                ((unsigned long long)page_to_pfn(pte) <<        \
  19                        (unsigned long long) PAGE_SHIFT)))
  20#define pmd_pgtable(pmd) pmd_page(pmd)
  21
  22/*
  23 * Allocate and free page tables.
  24 */
  25extern pgd_t *pgd_alloc(struct mm_struct *);
  26extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  27
  28extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  29extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
  30
  31static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  32{
  33        free_page((unsigned long) pte);
  34}
  35
  36static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
  37{
  38        pgtable_page_dtor(pte);
  39        __free_page(pte);
  40}
  41
  42#define __pte_free_tlb(tlb,pte, address)                \
  43do {                                                    \
  44        pgtable_page_dtor(pte);                         \
  45        tlb_remove_page((tlb),(pte));                   \
  46} while (0)
  47
  48#ifdef CONFIG_3_LEVEL_PGTABLES
  49
  50static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
  51{
  52        free_page((unsigned long)pmd);
  53}
  54
  55#define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))
  56#endif
  57
  58#define check_pgt_cache()       do { } while (0)
  59
  60#endif
  61
  62