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