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

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * arch/arm/include/asm/pgtable-3level-types.h
  4  *
  5  * Copyright (C) 2011 ARM Ltd.
  6  * Author: Catalin Marinas <catalin.marinas@arm.com>
  7  */
  8 #ifndef _ASM_PGTABLE_3LEVEL_TYPES_H
  9 #define _ASM_PGTABLE_3LEVEL_TYPES_H
 10 
 11 #include <asm/types.h>
 12 
 13 typedef u64 pteval_t;
 14 typedef u64 pmdval_t;
 15 typedef u64 pgdval_t;
 16 
 17 #undef STRICT_MM_TYPECHECKS
 18 
 19 #ifdef STRICT_MM_TYPECHECKS
 20 
 21 /*
 22  * These are used to make use of C type-checking..
 23  */
 24 typedef struct { pteval_t pte; } pte_t;
 25 typedef struct { pmdval_t pmd; } pmd_t;
 26 typedef struct { pgdval_t pgd; } pgd_t;
 27 typedef struct { pteval_t pgprot; } pgprot_t;
 28 
 29 #define pte_val(x)      ((x).pte)
 30 #define pmd_val(x)      ((x).pmd)
 31 #define pgd_val(x)      ((x).pgd)
 32 #define pgprot_val(x)   ((x).pgprot)
 33 
 34 #define __pte(x)        ((pte_t) { (x) } )
 35 #define __pmd(x)        ((pmd_t) { (x) } )
 36 #define __pgd(x)        ((pgd_t) { (x) } )
 37 #define __pgprot(x)     ((pgprot_t) { (x) } )
 38 
 39 #else   /* !STRICT_MM_TYPECHECKS */
 40 
 41 typedef pteval_t pte_t;
 42 typedef pmdval_t pmd_t;
 43 typedef pgdval_t pgd_t;
 44 typedef pteval_t pgprot_t;
 45 
 46 #define pte_val(x)      (x)
 47 #define pmd_val(x)      (x)
 48 #define pgd_val(x)      (x)
 49 #define pgprot_val(x)   (x)
 50 
 51 #define __pte(x)        (x)
 52 #define __pmd(x)        (x)
 53 #define __pgd(x)        (x)
 54 #define __pgprot(x)     (x)
 55 
 56 #endif  /* STRICT_MM_TYPECHECKS */
 57 
 58 #endif  /* _ASM_PGTABLE_3LEVEL_TYPES_H */
 59 

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