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TOMOYO Linux Cross Reference
Linux/arch/arm64/include/asm/pgtable-types.h

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  1 /*
  2  * Page table types definitions.
  3  *
  4  * Copyright (C) 2014 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, see <http://www.gnu.org/licenses/>.
 18  */
 19 
 20 #ifndef __ASM_PGTABLE_TYPES_H
 21 #define __ASM_PGTABLE_TYPES_H
 22 
 23 #include <asm/types.h>
 24 
 25 typedef u64 pteval_t;
 26 typedef u64 pmdval_t;
 27 typedef u64 pudval_t;
 28 typedef u64 pgdval_t;
 29 
 30 #undef STRICT_MM_TYPECHECKS
 31 
 32 #ifdef STRICT_MM_TYPECHECKS
 33 
 34 /*
 35  * These are used to make use of C type-checking..
 36  */
 37 typedef struct { pteval_t pte; } pte_t;
 38 #define pte_val(x)      ((x).pte)
 39 #define __pte(x)        ((pte_t) { (x) } )
 40 
 41 #if CONFIG_PGTABLE_LEVELS > 2
 42 typedef struct { pmdval_t pmd; } pmd_t;
 43 #define pmd_val(x)      ((x).pmd)
 44 #define __pmd(x)        ((pmd_t) { (x) } )
 45 #endif
 46 
 47 #if CONFIG_PGTABLE_LEVELS > 3
 48 typedef struct { pudval_t pud; } pud_t;
 49 #define pud_val(x)      ((x).pud)
 50 #define __pud(x)        ((pud_t) { (x) } )
 51 #endif
 52 
 53 typedef struct { pgdval_t pgd; } pgd_t;
 54 #define pgd_val(x)      ((x).pgd)
 55 #define __pgd(x)        ((pgd_t) { (x) } )
 56 
 57 typedef struct { pteval_t pgprot; } pgprot_t;
 58 #define pgprot_val(x)   ((x).pgprot)
 59 #define __pgprot(x)     ((pgprot_t) { (x) } )
 60 
 61 #else   /* !STRICT_MM_TYPECHECKS */
 62 
 63 typedef pteval_t pte_t;
 64 #define pte_val(x)      (x)
 65 #define __pte(x)        (x)
 66 
 67 #if CONFIG_PGTABLE_LEVELS > 2
 68 typedef pmdval_t pmd_t;
 69 #define pmd_val(x)      (x)
 70 #define __pmd(x)        (x)
 71 #endif
 72 
 73 #if CONFIG_PGTABLE_LEVELS > 3
 74 typedef pudval_t pud_t;
 75 #define pud_val(x)      (x)
 76 #define __pud(x)        (x)
 77 #endif
 78 
 79 typedef pgdval_t pgd_t;
 80 #define pgd_val(x)      (x)
 81 #define __pgd(x)        (x)
 82 
 83 typedef pteval_t pgprot_t;
 84 #define pgprot_val(x)   (x)
 85 #define __pgprot(x)     (x)
 86 
 87 #endif /* STRICT_MM_TYPECHECKS */
 88 
 89 #if CONFIG_PGTABLE_LEVELS == 2
 90 #include <asm-generic/pgtable-nopmd.h>
 91 #elif CONFIG_PGTABLE_LEVELS == 3
 92 #include <asm-generic/pgtable-nopud.h>
 93 #endif
 94 
 95 #endif  /* __ASM_PGTABLE_TYPES_H */
 96 

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