LXR linux/arch/mn10300/include/asm/pgalloc.h

   1/* MN10300 Page and page table/directory allocation
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#ifndef _ASM_PGALLOC_H
  12#define _ASM_PGALLOC_H
  13
  14#include <asm/processor.h>
  15#include <asm/page.h>
  16#include <linux/threads.h>
  17#include <linux/mm.h>           /* for struct page */
  18
  19struct mm_struct;
  20struct page;
  21
  22/* attach a page table to a PMD entry */
  23#define pmd_populate_kernel(mm, pmd, pte) \
  24        set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
  25
  26static inline
  27void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
  28{
  29        set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
  30}
  31#define pmd_pgtable(pmd) pmd_page(pmd)
  32
  33/*
  34 * Allocate and free page tables.
  35 */
  36
  37extern pgd_t *pgd_alloc(struct mm_struct *);
  38extern void pgd_free(struct mm_struct *, pgd_t *);
  39
  40extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  41extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  42
  43static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  44{
  45        free_page((unsigned long) pte);
  46}
  47
  48static inline void pte_free(struct mm_struct *mm, struct page *pte)
  49{
  50        __free_page(pte);
  51}
  52
  53
  54#define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte))
  55
  56#endif /* _ASM_PGALLOC_H */
  57