tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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