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#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 */
  26extern pgd_t *pgd_alloc(struct mm_struct *);
  27extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
  28
  29extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  30extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
  31
  32static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  33{
  34        free_page((unsigned long) pte);
  35}
  36
  37static 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)                \
  44do {                                                    \
  45        pgtable_page_dtor(pte);                         \
  46        tlb_remove_page((tlb),(pte));                   \
  47} while (0)
  48
  49#ifdef CONFIG_3_LEVEL_PGTABLES
  50
  51static 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
  62
  63