arch/arm64/include/asm/pgtable-3level-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_3LEVEL_TYPES_H
  17 #define __ASM_PGTABLE_3LEVEL_TYPES_H
  18
  19 #include <asm/types.h>
  20
  21 typedef u64 pteval_t;
  22 typedef u64 pmdval_t;
  23 typedef u64 pgdval_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  */
  32 typedef struct { pteval_t pte; } pte_t;
  33 typedef struct { pmdval_t pmd; } pmd_t;
  34 typedef struct { pgdval_t pgd; } pgd_t;
  35 typedef struct { pteval_t pgprot; } pgprot_t;
  36
  37 #define pte_val(x)      ((x).pte)
  38 #define pmd_val(x)      ((x).pmd)
  39 #define pgd_val(x)      ((x).pgd)
  40 #define pgprot_val(x)   ((x).pgprot)
  41
  42 #define __pte(x)        ((pte_t) { (x) } )
  43 #define __pmd(x)        ((pmd_t) { (x) } )
  44 #define __pgd(x)        ((pgd_t) { (x) } )
  45 #define __pgprot(x)     ((pgprot_t) { (x) } )
  46
  47 #else   /* !STRICT_MM_TYPECHECKS */
  48
  49 typedef pteval_t pte_t;
  50 typedef pmdval_t pmd_t;
  51 typedef pgdval_t pgd_t;
  52 typedef pteval_t pgprot_t;
  53
  54 #define pte_val(x)      (x)
  55 #define pmd_val(x)      (x)
  56 #define pgd_val(x)      (x)
  57 #define pgprot_val(x)   (x)
  58
  59 #define __pte(x)        (x)
  60 #define __pmd(x)        (x)
  61 #define __pgd(x)        (x)
  62 #define __pgprot(x)     (x)
  63
  64 #endif  /* STRICT_MM_TYPECHECKS */
  65
  66 #include <asm-generic/pgtable-nopud.h>
  67
  68 #endif  /* __ASM_PGTABLE_3LEVEL_TYPES_H */