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 typedef u64 pteval_t;
  20 typedef u64 pgdval_t;
  21 typedef pgdval_t pmdval_t;
  22
  23 #undef STRICT_MM_TYPECHECKS
  24
  25 #ifdef STRICT_MM_TYPECHECKS
  26
  27 /*
  28  * These are used to make use of C type-checking..
  29  */
  30 typedef struct { pteval_t pte; } pte_t;
  31 typedef struct { pgdval_t pgd; } pgd_t;
  32 typedef struct { pteval_t pgprot; } pgprot_t;
  33
  34 #define pte_val(x)      ((x).pte)
  35 #define pgd_val(x)      ((x).pgd)
  36 #define pgprot_val(x)   ((x).pgprot)
  37
  38 #define __pte(x)        ((pte_t) { (x) } )
  39 #define __pgd(x)        ((pgd_t) { (x) } )
  40 #define __pgprot(x)     ((pgprot_t) { (x) } )
  41
  42 #else   /* !STRICT_MM_TYPECHECKS */
  43
  44 typedef pteval_t pte_t;
  45 typedef pgdval_t pgd_t;
  46 typedef pteval_t pgprot_t;
  47
  48 #define pte_val(x)      (x)
  49 #define pgd_val(x)      (x)
  50 #define pgprot_val(x)   (x)
  51
  52 #define __pte(x)        (x)
  53 #define __pgd(x)        (x)
  54 #define __pgprot(x)     (x)
  55
  56 #endif  /* STRICT_MM_TYPECHECKS */
  57
  58 #include <asm-generic/pgtable-nopmd.h>
  59
  60 #endif  /* __ASM_PGTABLE_2LEVEL_TYPES_H */