LXR linux/arch/avr32/include/asm/pgtable-2level.h

   1/*
   2 * Copyright (C) 2004-2006 Atmel Corporation
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8#ifndef __ASM_AVR32_PGTABLE_2LEVEL_H
   9#define __ASM_AVR32_PGTABLE_2LEVEL_H
  10
  11#include <asm-generic/pgtable-nopmd.h>
  12
  13/*
  14 * Traditional 2-level paging structure
  15 */
  16#define PGDIR_SHIFT     22
  17#define PTRS_PER_PGD    1024
  18
  19#define PTRS_PER_PTE    1024
  20
  21#ifndef __ASSEMBLY__
  22#define pte_ERROR(e) \
  23        printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
  24#define pgd_ERROR(e) \
  25        printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
  26
  27/*
  28 * Certain architectures need to do special things when PTEs
  29 * within a page table are directly modified.  Thus, the following
  30 * hook is made available.
  31 */
  32#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
  33#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep, pteval)
  34
  35/*
  36 * (pmds are folded into pgds so this doesn't get actually called,
  37 * but the define is needed for a generic inline function.)
  38 */
  39#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
  40
  41#define pte_pfn(x)              ((unsigned long)(((x).pte >> PAGE_SHIFT)))
  42#define pfn_pte(pfn, prot)      __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
  43#define pfn_pmd(pfn, prot)      __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
  44
  45#endif /* !__ASSEMBLY__ */
  46
  47#endif /* __ASM_AVR32_PGTABLE_2LEVEL_H */
  48