LXR linux/arch/arm64/include/asm/pgtable-2level-types.h

   1/*
   2 * Copyright (C) 2012 ARM Ltd.
   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 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 *
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15 */
  16#ifndef __ASM_PGTABLE_2LEVEL_TYPES_H
  17#define __ASM_PGTABLE_2LEVEL_TYPES_H
  18
  19#include <asm/types.h>
  20
  21typedef u64 pteval_t;
  22typedef u64 pgdval_t;
  23typedef pgdval_t pmdval_t;
  24
  25#undef STRICT_MM_TYPECHECKS
  26
  27#ifdef STRICT_MM_TYPECHECKS
  28
  29/*
  30 * These are used to make use of C type-checking..
  31 */
  32typedef struct { pteval_t pte; } pte_t;
  33typedef struct { pgdval_t pgd; } pgd_t;
  34typedef struct { pteval_t pgprot; } pgprot_t;
  35
  36#define pte_val(x)      ((x).pte)
  37#define pgd_val(x)      ((x).pgd)
  38#define pgprot_val(x)   ((x).pgprot)
  39
  40#define __pte(x)        ((pte_t) { (x) } )
  41#define __pgd(x)        ((pgd_t) { (x) } )
  42#define __pgprot(x)     ((pgprot_t) { (x) } )
  43
  44#else   /* !STRICT_MM_TYPECHECKS */
  45
  46typedef pteval_t pte_t;
  47typedef pgdval_t pgd_t;
  48typedef pteval_t pgprot_t;
  49
  50#define pte_val(x)      (x)
  51#define pgd_val(x)      (x)
  52#define pgprot_val(x)   (x)
  53
  54#define __pte(x)        (x)
  55#define __pgd(x)        (x)
  56#define __pgprot(x)     (x)
  57
  58#endif  /* STRICT_MM_TYPECHECKS */
  59
  60#include <asm-generic/pgtable-nopmd.h>
  61
  62#endif  /* __ASM_PGTABLE_2LEVEL_TYPES_H */
  63