tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * arch/arm/include/asm/pgtable-3level-hwdef.h
3 *
4 * Copyright (C) 2011 ARM Ltd.
5 * Author: Catalin Marinas <catalin.marinas@arm.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#ifndef _ASM_PGTABLE_3LEVEL_HWDEF_H
21#define _ASM_PGTABLE_3LEVEL_HWDEF_H
22
23/*
24 * Hardware page table definitions.
25 *
26 * + Level 1/2 descriptor
27 * - common
28 */
29#define PMD_TYPE_MASK (_AT(pmdval_t, 3) << 0)
30#define PMD_TYPE_FAULT (_AT(pmdval_t, 0) << 0)
31#define PMD_TYPE_TABLE (_AT(pmdval_t, 3) << 0)
32#define PMD_TYPE_SECT (_AT(pmdval_t, 1) << 0)
33#define PMD_BIT4 (_AT(pmdval_t, 0))
34#define PMD_DOMAIN(x) (_AT(pmdval_t, 0))
35
36/*
37 * - section
38 */
39#define PMD_SECT_BUFFERABLE (_AT(pmdval_t, 1) << 2)
40#define PMD_SECT_CACHEABLE (_AT(pmdval_t, 1) << 3)
41#define PMD_SECT_S (_AT(pmdval_t, 3) << 8)
42#define PMD_SECT_AF (_AT(pmdval_t, 1) << 10)
43#define PMD_SECT_nG (_AT(pmdval_t, 1) << 11)
44#define PMD_SECT_XN (_AT(pmdval_t, 1) << 54)
45#define PMD_SECT_AP_WRITE (_AT(pmdval_t, 0))
46#define PMD_SECT_AP_READ (_AT(pmdval_t, 0))
47#define PMD_SECT_TEX(x) (_AT(pmdval_t, 0))
48
49/*
50 * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
51 */
52#define PMD_SECT_UNCACHED (_AT(pmdval_t, 0) << 2) /* strongly ordered */
53#define PMD_SECT_BUFFERED (_AT(pmdval_t, 1) << 2) /* normal non-cacheable */
54#define PMD_SECT_WT (_AT(pmdval_t, 2) << 2) /* normal inner write-through */
55#define PMD_SECT_WB (_AT(pmdval_t, 3) << 2) /* normal inner write-back */
56#define PMD_SECT_WBWA (_AT(pmdval_t, 7) << 2) /* normal inner write-alloc */
57
58/*
59 * + Level 3 descriptor (PTE)
60 */
61#define PTE_TYPE_MASK (_AT(pteval_t, 3) << 0)
62#define PTE_TYPE_FAULT (_AT(pteval_t, 0) << 0)
63#define PTE_TYPE_PAGE (_AT(pteval_t, 3) << 0)
64#define PTE_BUFFERABLE (_AT(pteval_t, 1) << 2) /* AttrIndx[0] */
65#define PTE_CACHEABLE (_AT(pteval_t, 1) << 3) /* AttrIndx[1] */
66#define PTE_EXT_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */
67#define PTE_EXT_AF (_AT(pteval_t, 1) << 10) /* Access Flag */
68#define PTE_EXT_NG (_AT(pteval_t, 1) << 11) /* nG */
69#define PTE_EXT_XN (_AT(pteval_t, 1) << 54) /* XN */
70
71/*
72 * 40-bit physical address supported.
73 */
74#define PHYS_MASK_SHIFT (40)
75#define PHYS_MASK ((1ULL << PHYS_MASK_SHIFT) - 1)
76
77#endif