1 /* 2 * arch/arm/include/asm/pgtable-2level-types.h 3 * 4 * Copyright (C) 1995-2003 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 */ 19 #ifndef _ASM_PGTABLE_2LEVEL_TYPES_H 20 #define _ASM_PGTABLE_2LEVEL_TYPES_H 21 22 #include <asm/types.h> 23 24 typedef u32 pteval_t; 25 typedef u32 pmdval_t; 26 27 #undef STRICT_MM_TYPECHECKS 28 29 #ifdef STRICT_MM_TYPECHECKS 30 /* 31 * These are used to make use of C type-checking.. 32 */ 33 typedef struct { pteval_t pte; } pte_t; 34 typedef struct { pmdval_t pmd; } pmd_t; 35 typedef struct { pmdval_t pgd[2]; } pgd_t; 36 typedef struct { pteval_t pgprot; } pgprot_t; 37 38 #define pte_val(x) ((x).pte) 39 #define pmd_val(x) ((x).pmd) 40 #define pgd_val(x) ((x).pgd[0]) 41 #define pgprot_val(x) ((x).pgprot) 42 43 #define __pte(x) ((pte_t) { (x) } ) 44 #define __pmd(x) ((pmd_t) { (x) } ) 45 #define __pgprot(x) ((pgprot_t) { (x) } ) 46 47 #else 48 /* 49 * .. while these make it easier on the compiler 50 */ 51 typedef pteval_t pte_t; 52 typedef pmdval_t pmd_t; 53 typedef pmdval_t pgd_t[2]; 54 typedef pteval_t pgprot_t; 55 56 #define pte_val(x) (x) 57 #define pmd_val(x) (x) 58 #define pgd_val(x) ((x)[0]) 59 #define pgprot_val(x) (x) 60 61 #define __pte(x) (x) 62 #define __pmd(x) (x) 63 #define __pgprot(x) (x) 64 65 #endif /* STRICT_MM_TYPECHECKS */ 66 67 #endif /* _ASM_PGTABLE_2LEVEL_TYPES_H */ 68