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
  25 typedef u64 pteval_t;
  26 typedef u64 pmdval_t;
  27 typedef 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  */
  36 typedef struct { pteval_t pte; } pte_t;
  37 typedef struct { pmdval_t pmd; } pmd_t;
  38 typedef struct { pgdval_t pgd; } pgd_t;
  39 typedef 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
  53 typedef pteval_t pte_t;
  54 typedef pmdval_t pmd_t;
  55 typedef pgdval_t pgd_t;
  56 typedef 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 */