89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
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/*
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* linux/include/asm-arm/pgtable-hwdef.h
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*
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* Copyright (C) 1995-2002 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _ASMARM_PGTABLE_HWDEF_H
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#define _ASMARM_PGTABLE_HWDEF_H
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/*
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* Hardware page table definitions.
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*
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* + Level 1 descriptor (PMD)
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* - common
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*/
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#define PMD_TYPE_MASK (3 << 0)
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#define PMD_TYPE_FAULT (0 << 0)
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#define PMD_TYPE_TABLE (1 << 0)
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#define PMD_TYPE_SECT (2 << 0)
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#define PMD_BIT4 (1 << 4)
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#define PMD_DOMAIN(x) ((x) << 5)
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#define PMD_PROTECTION (1 << 9) /* v5 */
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/*
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* - section
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*/
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#define PMD_SECT_BUFFERABLE (1 << 2)
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#define PMD_SECT_CACHEABLE (1 << 3)
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#define PMD_SECT_AP_WRITE (1 << 10)
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#define PMD_SECT_AP_READ (1 << 11)
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#define PMD_SECT_TEX(x) ((x) << 12) /* v5 */
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#define PMD_SECT_APX (1 << 15) /* v6 */
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#define PMD_SECT_S (1 << 16) /* v6 */
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#define PMD_SECT_nG (1 << 17) /* v6 */
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#define PMD_SECT_SUPER (1 << 18) /* v6 */
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#define PMD_SECT_UNCACHED (0)
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#define PMD_SECT_BUFFERED (PMD_SECT_BUFFERABLE)
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#define PMD_SECT_WT (PMD_SECT_CACHEABLE)
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#define PMD_SECT_WB (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
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#define PMD_SECT_MINICACHE (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
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#define PMD_SECT_WBWA (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
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#define PMD_SECT_NONSHARED_DEV (PMD_SECT_TEX(2))
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/*
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* - coarse table (not used)
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*/
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/*
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* + Level 2 descriptor (PTE)
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* - common
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*/
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#define PTE_TYPE_MASK (3 << 0)
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#define PTE_TYPE_FAULT (0 << 0)
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#define PTE_TYPE_LARGE (1 << 0)
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#define PTE_TYPE_SMALL (2 << 0)
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#define PTE_TYPE_EXT (3 << 0) /* v5 */
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#define PTE_BUFFERABLE (1 << 2)
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#define PTE_CACHEABLE (1 << 3)
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/*
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* - extended small page/tiny page
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*/
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#define PTE_EXT_XN (1 << 0) /* v6 */
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#define PTE_EXT_AP_MASK (3 << 4)
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#define PTE_EXT_AP0 (1 << 4)
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#define PTE_EXT_AP1 (2 << 4)
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#define PTE_EXT_AP_UNO_SRO (0 << 4)
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#define PTE_EXT_AP_UNO_SRW (PTE_EXT_AP0)
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#define PTE_EXT_AP_URO_SRW (PTE_EXT_AP1)
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#define PTE_EXT_AP_URW_SRW (PTE_EXT_AP1|PTE_EXT_AP0)
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#define PTE_EXT_TEX(x) ((x) << 6) /* v5 */
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#define PTE_EXT_APX (1 << 9) /* v6 */
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#define PTE_EXT_SHARED (1 << 10) /* v6 */
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#define PTE_EXT_NG (1 << 11) /* v6 */
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/*
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* - small page
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*/
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#define PTE_SMALL_AP_MASK (0xff << 4)
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#define PTE_SMALL_AP_UNO_SRO (0x00 << 4)
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#define PTE_SMALL_AP_UNO_SRW (0x55 << 4)
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#define PTE_SMALL_AP_URO_SRW (0xaa << 4)
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#define PTE_SMALL_AP_URW_SRW (0xff << 4)
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#endif
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