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
24typedef u32 pteval_t;
25typedef 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 */
33typedef struct { pteval_t pte; } pte_t;
34typedef struct { pmdval_t pmd; } pmd_t;
35typedef struct { pmdval_t pgd[2]; } pgd_t;
36typedef 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 */
51typedef pteval_t pte_t;
52typedef pmdval_t pmd_t;
53typedef pmdval_t pgd_t[2];
54typedef 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