LXR linux/arch/arm/include/asm/pgtable-3level-types.h

   1/*
   2 * arch/arm/include/asm/pgtable-3level-types.h
   3 *
   4 * Copyright (C) 2011 ARM Ltd.
   5 * Author: Catalin Marinas <catalin.marinas@arm.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 */
  20#ifndef _ASM_PGTABLE_3LEVEL_TYPES_H
  21#define _ASM_PGTABLE_3LEVEL_TYPES_H
  22
  23#include <asm/types.h>
  24
  25typedef u64 pteval_t;
  26typedef u64 pmdval_t;
  27typedef u64 pgdval_t;
  28
  29#undef STRICT_MM_TYPECHECKS
  30
  31#ifdef STRICT_MM_TYPECHECKS
  32
  33/*
  34 * These are used to make use of C type-checking..
  35 */
  36typedef struct { pteval_t pte; } pte_t;
  37typedef struct { pmdval_t pmd; } pmd_t;
  38typedef struct { pgdval_t pgd; } pgd_t;
  39typedef struct { pteval_t pgprot; } pgprot_t;
  40
  41#define pte_val(x)      ((x).pte)
  42#define pmd_val(x)      ((x).pmd)
  43#define pgd_val(x)      ((x).pgd)
  44#define pgprot_val(x)   ((x).pgprot)
  45
  46#define __pte(x)        ((pte_t) { (x) } )
  47#define __pmd(x)        ((pmd_t) { (x) } )
  48#define __pgd(x)        ((pgd_t) { (x) } )
  49#define __pgprot(x)     ((pgprot_t) { (x) } )
  50
  51#else   /* !STRICT_MM_TYPECHECKS */
  52
  53typedef pteval_t pte_t;
  54typedef pmdval_t pmd_t;
  55typedef pgdval_t pgd_t;
  56typedef pteval_t pgprot_t;
  57
  58#define pte_val(x)      (x)
  59#define pmd_val(x)      (x)
  60#define pgd_val(x)      (x)
  61#define pgprot_val(x)   (x)
  62
  63#define __pte(x)        (x)
  64#define __pmd(x)        (x)
  65#define __pgd(x)        (x)
  66#define __pgprot(x)     (x)
  67
  68#endif  /* STRICT_MM_TYPECHECKS */
  69
  70#endif  /* _ASM_PGTABLE_3LEVEL_TYPES_H */
  71