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1 /*
2  * linux/arch/unicore32/include/asm/pgtable-hwdef.h
3  *
4  * Code specific to PKUnity SoC and UniCore ISA
5  *
6  * Copyright (C) 2001-2010 GUAN Xue-tao
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #ifndef __UNICORE_PGTABLE_HWDEF_H__
13 #define __UNICORE_PGTABLE_HWDEF_H__
14 
15 /*
16  * Hardware page table definitions.
17  *
18  * + Level 1 descriptor (PMD)
19  *   - common
20  */
21 #define PMD_TYPE_MASK		(3 << 0)
22 #define PMD_TYPE_TABLE		(0 << 0)
23 /*#define PMD_TYPE_LARGE	(1 << 0) */
24 #define PMD_TYPE_INVALID	(2 << 0)
25 #define PMD_TYPE_SECT		(3 << 0)
26 
27 #define PMD_PRESENT		(1 << 2)
28 #define PMD_YOUNG		(1 << 3)
29 
30 /*#define PMD_SECT_DIRTY	(1 << 4) */
31 #define PMD_SECT_CACHEABLE	(1 << 5)
32 #define PMD_SECT_EXEC		(1 << 6)
33 #define PMD_SECT_WRITE		(1 << 7)
34 #define PMD_SECT_READ		(1 << 8)
35 
36 /*
37  * + Level 2 descriptor (PTE)
38  *   - common
39  */
40 #define PTE_TYPE_MASK		(3 << 0)
41 #define PTE_TYPE_SMALL		(0 << 0)
42 #define PTE_TYPE_MIDDLE		(1 << 0)
43 #define PTE_TYPE_LARGE		(2 << 0)
44 #define PTE_TYPE_INVALID	(3 << 0)
45 
46 #define PTE_PRESENT		(1 << 2)
47 #define PTE_YOUNG		(1 << 3)
48 #define PTE_DIRTY		(1 << 4)
49 #define PTE_CACHEABLE		(1 << 5)
50 #define PTE_EXEC		(1 << 6)
51 #define PTE_WRITE		(1 << 7)
52 #define PTE_READ		(1 << 8)
53 
54 #endif
55