xref: /minix3/sys/arch/x86/include/pte.h (revision 1cd76c751364e6270e8d5a0daebc6d3d169baf4d)
1*1cd76c75SBen Gras /*	$NetBSD: pte.h,v 1.1 2010/07/06 20:50:35 cegger Exp $	*/
2*1cd76c75SBen Gras 
3*1cd76c75SBen Gras /*
4*1cd76c75SBen Gras  * Copyright (c) 2010 The NetBSD Foundation, Inc.
5*1cd76c75SBen Gras  * All rights reserved.
6*1cd76c75SBen Gras  *
7*1cd76c75SBen Gras  * This code is derived from software contributed to The NetBSD Foundation
8*1cd76c75SBen Gras  * by Christoph Egger.
9*1cd76c75SBen Gras  *
10*1cd76c75SBen Gras  * Redistribution and use in source and binary forms, with or without
11*1cd76c75SBen Gras  * modification, are permitted provided that the following conditions
12*1cd76c75SBen Gras  * are met:
13*1cd76c75SBen Gras  * 1. Redistributions of source code must retain the above copyright
14*1cd76c75SBen Gras  *    notice, this list of conditions and the following disclaimer.
15*1cd76c75SBen Gras  * 2. Redistributions in binary form must reproduce the above copyright
16*1cd76c75SBen Gras  *    notice, this list of conditions and the following disclaimer in the
17*1cd76c75SBen Gras  *    documentation and/or other materials provided with the distribution.
18*1cd76c75SBen Gras  *
19*1cd76c75SBen Gras  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20*1cd76c75SBen Gras  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21*1cd76c75SBen Gras  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22*1cd76c75SBen Gras  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23*1cd76c75SBen Gras  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*1cd76c75SBen Gras  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*1cd76c75SBen Gras  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*1cd76c75SBen Gras  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*1cd76c75SBen Gras  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*1cd76c75SBen Gras  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*1cd76c75SBen Gras  * POSSIBILITY OF SUCH DAMAGE.
30*1cd76c75SBen Gras  */
31*1cd76c75SBen Gras 
32*1cd76c75SBen Gras #ifndef _X86_PTE_H
33*1cd76c75SBen Gras #define _X86_PTE_H
34*1cd76c75SBen Gras 
35*1cd76c75SBen Gras /* Cacheability bits when we are using PAT */
36*1cd76c75SBen Gras #define PGC_WB          0               /* The default */
37*1cd76c75SBen Gras #define PGC_WC          PG_WT           /* WT and CD is WC */
38*1cd76c75SBen Gras #define PGC_UCMINUS     PG_N            /* UC but mtrr can override */
39*1cd76c75SBen Gras #define PGC_UC          (PG_WT | PG_N)  /* hard UC */
40*1cd76c75SBen Gras 
41*1cd76c75SBen Gras /*
42*1cd76c75SBen Gras  * page protection exception bits
43*1cd76c75SBen Gras  */
44*1cd76c75SBen Gras 
45*1cd76c75SBen Gras #define PGEX_P		0x01	/* protection violation (vs. no mapping) */
46*1cd76c75SBen Gras #define PGEX_W		0x02	/* exception during a write cycle */
47*1cd76c75SBen Gras #define PGEX_U		0x04	/* exception while in user mode (upl) */
48*1cd76c75SBen Gras #define PGEX_X		0x10	/* exception during instruction fetch */
49*1cd76c75SBen Gras 
50*1cd76c75SBen Gras #endif /* _X86_PTE_H */
51