xref: /illumos-gate/usr/src/uts/common/vm/faultcode.h (revision b4203d75)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
27 /*	  All Rights Reserved	*/
28 
29 /*
30  * University Copyright- Copyright (c) 1982, 1986, 1988
31  * The Regents of the University of California
32  * All Rights Reserved
33  *
34  * University Acknowledgment- Portions of this document are derived from
35  * software developed by the University of California, Berkeley, and its
36  * contributors.
37  */
38 
39 #ifndef	_VM_FAULTCODE_H
40 #define	_VM_FAULTCODE_H
41 
42 #ifdef	__cplusplus
43 extern "C" {
44 #endif
45 
46 /*
47  * This file describes the data type returned by vm routines
48  * which handle faults.
49  *
50  * If FC_CODE(fc) == FC_OBJERR, then FC_ERRNO(fc) contains the errno value
51  * returned by the underlying object mapped at the fault address.
52  */
53 #define	FC_HWERR	0x1	/* misc hardware error (e.g. bus timeout) */
54 #define	FC_ALIGN	0x2	/* hardware alignment error */
55 #define	FC_OBJERR	0x3	/* underlying object returned errno value */
56 #define	FC_PROT		0x4	/* access exceeded current protections */
57 #define	FC_NOMAP	0x5	/* no mapping at the fault address */
58 #define	FC_NOSUPPORT	0x6	/* operation not supported by driver */
59 
60 #define	FC_MAKE_ERR(e)	(((e) << 8) | FC_OBJERR)
61 
62 #define	FC_CODE(fc)	((fc) & 0xff)
63 #define	FC_ERRNO(fc)	((unsigned)(fc) >> 8)
64 
65 #ifndef	_ASM
66 typedef	int	faultcode_t;	/* type returned by vm fault routines */
67 
68 extern int fc_decode(faultcode_t);
69 
70 #endif	/* _ASM */
71 
72 #ifdef	__cplusplus
73 }
74 #endif
75 
76 #endif	/* _VM_FAULTCODE_H */
77