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

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  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 */
 71 

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