pgtable-hwdef.h

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/*
 * linux/arch/unicore32/include/asm/pgtable-hwdef.h
 *
 * Code specific to PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2010 GUAN Xue-tao
 *
 * 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 __UNICORE_PGTABLE_HWDEF_H__
#define __UNICORE_PGTABLE_HWDEF_H__

/*
 * Hardware page table definitions.
 *
 * + Level 1 descriptor (PMD)
 *   - common
 */
#define PMD_TYPE_MASK       (3 << 0)
#define PMD_TYPE_TABLE      (0 << 0)
/*#define PMD_TYPE_LARGE    (1 << 0) */
#define PMD_TYPE_INVALID    (2 << 0)
#define PMD_TYPE_SECT       (3 << 0)

#define PMD_PRESENT     (1 << 2)
#define PMD_YOUNG       (1 << 3)

/*#define PMD_SECT_DIRTY    (1 << 4) */
#define PMD_SECT_CACHEABLE  (1 << 5)
#define PMD_SECT_EXEC       (1 << 6)
#define PMD_SECT_WRITE      (1 << 7)
#define PMD_SECT_READ       (1 << 8)

/*
 * + Level 2 descriptor (PTE)
 *   - common
 */
#define PTE_TYPE_MASK       (3 << 0)
#define PTE_TYPE_SMALL      (0 << 0)
#define PTE_TYPE_MIDDLE     (1 << 0)
#define PTE_TYPE_LARGE      (2 << 0)
#define PTE_TYPE_INVALID    (3 << 0)

#define PTE_PRESENT     (1 << 2)
#define PTE_FILE        (1 << 3)    /* only when !PRESENT */
#define PTE_YOUNG       (1 << 3)
#define PTE_DIRTY       (1 << 4)
#define PTE_CACHEABLE       (1 << 5)
#define PTE_EXEC        (1 << 6)
#define PTE_WRITE       (1 << 7)
#define PTE_READ        (1 << 8)

#endif