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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/unicore32/include/asm/pgtable-hwdef.h
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/*

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 * linux/arch/unicore32/include/asm/pgtable-hwdef.h

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 *

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 * Code specific to PKUnity SoC and UniCore ISA

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 *

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 * Copyright (C) 2001-2010 GUAN Xue-tao

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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 __UNICORE_PGTABLE_HWDEF_H__

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#define __UNICORE_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_TABLE		(0 << 0)

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/*#define PMD_TYPE_LARGE	(1 << 0) */

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#define PMD_TYPE_INVALID	(2 << 0)

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#define PMD_TYPE_SECT		(3 << 0)

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#define PMD_PRESENT		(1 << 2)

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#define PMD_YOUNG		(1 << 3)

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/*#define PMD_SECT_DIRTY	(1 << 4) */

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#define PMD_SECT_CACHEABLE	(1 << 5)

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#define PMD_SECT_EXEC		(1 << 6)

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#define PMD_SECT_WRITE		(1 << 7)

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#define PMD_SECT_READ		(1 << 8)

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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_SMALL		(0 << 0)

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#define PTE_TYPE_MIDDLE		(1 << 0)

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#define PTE_TYPE_LARGE		(2 << 0)

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#define PTE_TYPE_INVALID	(3 << 0)

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#define PTE_PRESENT		(1 << 2)

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#define PTE_FILE		(1 << 3)	/* only when !PRESENT */

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#define PTE_YOUNG		(1 << 3)

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#define PTE_DIRTY		(1 << 4)

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#define PTE_CACHEABLE		(1 << 5)

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#define PTE_EXEC		(1 << 6)

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#define PTE_WRITE		(1 << 7)

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#define PTE_READ		(1 << 8)

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#endif

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