root/arch/arm/include/asm/pgtable-2level-types.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm/include/asm/pgtable-2level-types.h
   4  *
   5  * Copyright (C) 1995-2003 Russell King
   6  */
   7 #ifndef _ASM_PGTABLE_2LEVEL_TYPES_H
   8 #define _ASM_PGTABLE_2LEVEL_TYPES_H
   9 
  10 #include <asm/types.h>
  11 
  12 typedef u32 pteval_t;
  13 typedef u32 pmdval_t;
  14 
  15 #undef STRICT_MM_TYPECHECKS
  16 
  17 #ifdef STRICT_MM_TYPECHECKS
  18 /*
  19  * These are used to make use of C type-checking..
  20  */
  21 typedef struct { pteval_t pte; } pte_t;
  22 typedef struct { pmdval_t pmd; } pmd_t;
  23 typedef struct { pmdval_t pgd[2]; } pgd_t;
  24 typedef struct { pteval_t pgprot; } pgprot_t;
  25 
  26 #define pte_val(x)      ((x).pte)
  27 #define pmd_val(x)      ((x).pmd)
  28 #define pgd_val(x)      ((x).pgd[0])
  29 #define pgprot_val(x)   ((x).pgprot)
  30 
  31 #define __pte(x)        ((pte_t) { (x) } )
  32 #define __pmd(x)        ((pmd_t) { (x) } )
  33 #define __pgprot(x)     ((pgprot_t) { (x) } )
  34 
  35 #else
  36 /*
  37  * .. while these make it easier on the compiler
  38  */
  39 typedef pteval_t pte_t;
  40 typedef pmdval_t pmd_t;
  41 typedef pmdval_t pgd_t[2];
  42 typedef pteval_t pgprot_t;
  43 
  44 #define pte_val(x)      (x)
  45 #define pmd_val(x)      (x)
  46 #define pgd_val(x)      ((x)[0])
  47 #define pgprot_val(x)   (x)
  48 
  49 #define __pte(x)        (x)
  50 #define __pmd(x)        (x)
  51 #define __pgprot(x)     (x)
  52 
  53 #endif /* STRICT_MM_TYPECHECKS */
  54 
  55 #endif  /* _ASM_PGTABLE_2LEVEL_TYPES_H */