1 /*
2  *  arch/arm/include/asm/pgtable-2level-hwdef.h
3  *
4  *  Copyright (C) 1995-2002 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 #ifndef _ASM_PGTABLE_2LEVEL_HWDEF_H
11 #define _ASM_PGTABLE_2LEVEL_HWDEF_H
12 
13 /*
14  * Hardware page table definitions.
15  *
16  * + Level 1 descriptor (PMD)
17  *   - common
18  */
19 #define PMD_TYPE_MASK		(_AT(pmdval_t, 3) << 0)
20 #define PMD_TYPE_FAULT		(_AT(pmdval_t, 0) << 0)
21 #define PMD_TYPE_TABLE		(_AT(pmdval_t, 1) << 0)
22 #define PMD_TYPE_SECT		(_AT(pmdval_t, 2) << 0)
23 #define PMD_BIT4		(_AT(pmdval_t, 1) << 4)
24 #define PMD_DOMAIN(x)		(_AT(pmdval_t, (x)) << 5)
25 #define PMD_PROTECTION		(_AT(pmdval_t, 1) << 9)		/* v5 */
26 /*
27  *   - section
28  */
29 #define PMD_SECT_BUFFERABLE	(_AT(pmdval_t, 1) << 2)
30 #define PMD_SECT_CACHEABLE	(_AT(pmdval_t, 1) << 3)
31 #define PMD_SECT_XN		(_AT(pmdval_t, 1) << 4)		/* v6 */
32 #define PMD_SECT_AP_WRITE	(_AT(pmdval_t, 1) << 10)
33 #define PMD_SECT_AP_READ	(_AT(pmdval_t, 1) << 11)
34 #define PMD_SECT_TEX(x)		(_AT(pmdval_t, (x)) << 12)	/* v5 */
35 #define PMD_SECT_APX		(_AT(pmdval_t, 1) << 15)	/* v6 */
36 #define PMD_SECT_S		(_AT(pmdval_t, 1) << 16)	/* v6 */
37 #define PMD_SECT_nG		(_AT(pmdval_t, 1) << 17)	/* v6 */
38 #define PMD_SECT_SUPER		(_AT(pmdval_t, 1) << 18)	/* v6 */
39 #define PMD_SECT_AF		(_AT(pmdval_t, 0))
40 
41 #define PMD_SECT_UNCACHED	(_AT(pmdval_t, 0))
42 #define PMD_SECT_BUFFERED	(PMD_SECT_BUFFERABLE)
43 #define PMD_SECT_WT		(PMD_SECT_CACHEABLE)
44 #define PMD_SECT_WB		(PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
45 #define PMD_SECT_MINICACHE	(PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
46 #define PMD_SECT_WBWA		(PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
47 #define PMD_SECT_NONSHARED_DEV	(PMD_SECT_TEX(2))
48 
49 /*
50  *   - coarse table (not used)
51  */
52 
53 /*
54  * + Level 2 descriptor (PTE)
55  *   - common
56  */
57 #define PTE_TYPE_MASK		(_AT(pteval_t, 3) << 0)
58 #define PTE_TYPE_FAULT		(_AT(pteval_t, 0) << 0)
59 #define PTE_TYPE_LARGE		(_AT(pteval_t, 1) << 0)
60 #define PTE_TYPE_SMALL		(_AT(pteval_t, 2) << 0)
61 #define PTE_TYPE_EXT		(_AT(pteval_t, 3) << 0)		/* v5 */
62 #define PTE_BUFFERABLE		(_AT(pteval_t, 1) << 2)
63 #define PTE_CACHEABLE		(_AT(pteval_t, 1) << 3)
64 
65 /*
66  *   - extended small page/tiny page
67  */
68 #define PTE_EXT_XN		(_AT(pteval_t, 1) << 0)		/* v6 */
69 #define PTE_EXT_AP_MASK		(_AT(pteval_t, 3) << 4)
70 #define PTE_EXT_AP0		(_AT(pteval_t, 1) << 4)
71 #define PTE_EXT_AP1		(_AT(pteval_t, 2) << 4)
72 #define PTE_EXT_AP_UNO_SRO	(_AT(pteval_t, 0) << 4)
73 #define PTE_EXT_AP_UNO_SRW	(PTE_EXT_AP0)
74 #define PTE_EXT_AP_URO_SRW	(PTE_EXT_AP1)
75 #define PTE_EXT_AP_URW_SRW	(PTE_EXT_AP1|PTE_EXT_AP0)
76 #define PTE_EXT_TEX(x)		(_AT(pteval_t, (x)) << 6)	/* v5 */
77 #define PTE_EXT_APX		(_AT(pteval_t, 1) << 9)		/* v6 */
78 #define PTE_EXT_COHERENT	(_AT(pteval_t, 1) << 9)		/* XScale3 */
79 #define PTE_EXT_SHARED		(_AT(pteval_t, 1) << 10)	/* v6 */
80 #define PTE_EXT_NG		(_AT(pteval_t, 1) << 11)	/* v6 */
81 
82 /*
83  *   - small page
84  */
85 #define PTE_SMALL_AP_MASK	(_AT(pteval_t, 0xff) << 4)
86 #define PTE_SMALL_AP_UNO_SRO	(_AT(pteval_t, 0x00) << 4)
87 #define PTE_SMALL_AP_UNO_SRW	(_AT(pteval_t, 0x55) << 4)
88 #define PTE_SMALL_AP_URO_SRW	(_AT(pteval_t, 0xaa) << 4)
89 #define PTE_SMALL_AP_URW_SRW	(_AT(pteval_t, 0xff) << 4)
90 
91 #define PHYS_MASK		(~0UL)
92 
93 #endif
94