root / lab4 / .minix-src / include / x86 / pte.h @ 14
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/* $NetBSD: pte.h,v 1.1 2010/07/06 20:50:35 cegger Exp $ */
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/*
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christoph Egger.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _X86_PTE_H
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#define _X86_PTE_H
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/* Cacheability bits when we are using PAT */
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#define PGC_WB 0 /* The default */ |
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#define PGC_WC PG_WT /* WT and CD is WC */ |
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#define PGC_UCMINUS PG_N /* UC but mtrr can override */ |
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#define PGC_UC (PG_WT | PG_N) /* hard UC */ |
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/*
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* page protection exception bits
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*/
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#define PGEX_P 0x01 /* protection violation (vs. no mapping) */ |
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#define PGEX_W 0x02 /* exception during a write cycle */ |
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#define PGEX_U 0x04 /* exception while in user mode (upl) */ |
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#define PGEX_X 0x10 /* exception during instruction fetch */ |
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#endif /* _X86_PTE_H */ |