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pgtable-2level-hwdef.h
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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