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