1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 1987 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _vm_faultcode_h
28#define	_vm_faultcode_h
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32/*
33 * This file describes the "code" that is delivered during
34 * SIGBUS and SIGSEGV exceptions.  It also describes the data
35 * type returned by vm routines which handle faults.
36 *
37 * If FC_CODE(fc) == FC_OBJERR, then FC_ERRNO(fc) contains the errno value
38 * returned by the underlying object mapped at the fault address.
39 */
40#define	FC_HWERR	0x1	/* misc hardware error (e.g. bus timeout) */
41#define	FC_ALIGN	0x2	/* hardware alignment error */
42#define	FC_NOMAP	0x3	/* no mapping at the fault address */
43#define	FC_PROT		0x4	/* access exceeded current protections */
44#define	FC_OBJERR	0x5	/* underlying object returned errno value */
45
46#define	FC_MAKE_ERR(e)	(((e) << 8) | FC_OBJERR)
47
48#define	FC_CODE(fc)	((fc) & 0xff)
49#define	FC_ERRNO(fc)	((unsigned)(fc) >> 8)
50
51#ifndef LOCORE
52typedef	int	faultcode_t;	/* type returned by vm fault routines */
53#endif	/* LOCORE */
54
55#endif /* !_vm_faultcode_h */
56