linux-vybrid_public/arch/arm/include/asm/pgtable-hwdef.h

/*
 *  arch/arm/include/asm/pgtable-hwdef.h
 *
 *  Copyright (C) 1995-2002 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _ASMARM_PGTABLE_HWDEF_H
#define _ASMARM_PGTABLE_HWDEF_H

/*
 * Hardware page table definitions.
 *
 * + Level 1 descriptor (PMD)
 *   - common
 */
#define PMD_TYPE_MASK		(3 << 0)
#define PMD_TYPE_FAULT		(0 << 0)
#define PMD_TYPE_TABLE		(1 << 0)
#define PMD_TYPE_SECT		(2 << 0)
#define PMD_BIT4		(1 << 4)
#define PMD_DOMAIN(x)		((x) << 5)
#define PMD_PROTECTION		(1 << 9)	/* v5 */
/*
 *   - section
 */
#define PMD_SECT_BUFFERABLE	(1 << 2)
#define PMD_SECT_CACHEABLE	(1 << 3)
#define PMD_SECT_XN		(1 << 4)	/* v6 */
#define PMD_SECT_AP_WRITE	(1 << 10)
#define PMD_SECT_AP_READ	(1 << 11)
#define PMD_SECT_TEX(x)		((x) << 12)	/* v5 */
#define PMD_SECT_APX		(1 << 15)	/* v6 */
#define PMD_SECT_S		(1 << 16)	/* v6 */
#define PMD_SECT_nG		(1 << 17)	/* v6 */
#define PMD_SECT_SUPER		(1 << 18)	/* v6 */

#define PMD_SECT_UNCACHED	(0)
#define PMD_SECT_BUFFERED	(PMD_SECT_BUFFERABLE)
#define PMD_SECT_WT		(PMD_SECT_CACHEABLE)
#define PMD_SECT_WB		(PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
#define PMD_SECT_MINICACHE	(PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
#define PMD_SECT_WBWA		(PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
#define PMD_SECT_NONSHARED_DEV	(PMD_SECT_TEX(2))

/*
 *   - coarse table (not used)
 */

/*
 * + Level 2 descriptor (PTE)
 *   - common
 */
#define PTE_TYPE_MASK		(3 << 0)
#define PTE_TYPE_FAULT		(0 << 0)
#define PTE_TYPE_LARGE		(1 << 0)
#define PTE_TYPE_SMALL		(2 << 0)
#define PTE_TYPE_EXT		(3 << 0)	/* v5 */
#define PTE_BUFFERABLE		(1 << 2)
#define PTE_CACHEABLE		(1 << 3)

/*
 *   - extended small page/tiny page
 */
#define PTE_EXT_XN		(1 << 0)	/* v6 */
#define PTE_EXT_AP_MASK		(3 << 4)
#define PTE_EXT_AP0		(1 << 4)
#define PTE_EXT_AP1		(2 << 4)
#define PTE_EXT_AP_UNO_SRO	(0 << 4)
#define PTE_EXT_AP_UNO_SRW	(PTE_EXT_AP0)
#define PTE_EXT_AP_URO_SRW	(PTE_EXT_AP1)
#define PTE_EXT_AP_URW_SRW	(PTE_EXT_AP1|PTE_EXT_AP0)
#define PTE_EXT_TEX(x)		((x) << 6)	/* v5 */
#define PTE_EXT_APX		(1 << 9)	/* v6 */
#define PTE_EXT_COHERENT	(1 << 9)	/* XScale3 */
#define PTE_EXT_SHARED		(1 << 10)	/* v6 */
#define PTE_EXT_NG		(1 << 11)	/* v6 */

/*
 *   - small page
 */
#define PTE_SMALL_AP_MASK	(0xff << 4)
#define PTE_SMALL_AP_UNO_SRO	(0x00 << 4)
#define PTE_SMALL_AP_UNO_SRW	(0x55 << 4)
#define PTE_SMALL_AP_URO_SRW	(0xaa << 4)
#define PTE_SMALL_AP_URW_SRW	(0xff << 4)

#endif