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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

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