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/page.h>
  15#include <linux/threads.h>
  16#include <linux/mm.h>           /* for struct page */
  17
  18struct mm_struct;
  19struct page;
  20
  21/* attach a page table to a PMD entry */
  22#define pmd_populate_kernel(mm, pmd, pte) \
  23        set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE))
  24
  25static inline
  26void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
  27{
  28        set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE));
  29}
  30#define pmd_pgtable(pmd) pmd_page(pmd)
  31
  32/*
  33 * Allocate and free page tables.
  34 */
  35
  36extern pgd_t *pgd_alloc(struct mm_struct *);
  37extern void pgd_free(struct mm_struct *, pgd_t *);
  38
  39extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
  40extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
  41
  42static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  43{
  44        free_page((unsigned long) pte);
  45}
  46
  47static inline void pte_free(struct mm_struct *mm, struct page *pte)
  48{
  49        __free_page(pte);
  50}
  51
  52
  53#define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte))
  54
  55#endif /* _ASM_PGALLOC_H */
  56