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56372b0b2f
This patch implements fault handling of memory management. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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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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