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      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 #pragma ident	"@(#)faultcode.h	1.18	07/09/18 SMI"
     43 
     44 #ifdef	__cplusplus
     45 extern "C" {
     46 #endif
     47 
     48 /*
     49  * This file describes the data type returned by vm routines
     50  * which handle faults.
     51  *
     52  * If FC_CODE(fc) == FC_OBJERR, then FC_ERRNO(fc) contains the errno value
     53  * returned by the underlying object mapped at the fault address.
     54  */
     55 #define	FC_HWERR	0x1	/* misc hardware error (e.g. bus timeout) */
     56 #define	FC_ALIGN	0x2	/* hardware alignment error */
     57 #define	FC_OBJERR	0x3	/* underlying object returned errno value */
     58 #define	FC_PROT		0x4	/* access exceeded current protections */
     59 #define	FC_NOMAP	0x5	/* no mapping at the fault address */
     60 #define	FC_NOSUPPORT	0x6	/* operation not supported by driver */
     61 
     62 #define	FC_MAKE_ERR(e)	(((e) << 8) | FC_OBJERR)
     63 
     64 #define	FC_CODE(fc)	((fc) & 0xff)
     65 #define	FC_ERRNO(fc)	((unsigned)(fc) >> 8)
     66 
     67 #ifndef	_ASM
     68 typedef	int	faultcode_t;	/* type returned by vm fault routines */
     69 
     70 extern int fc_decode(faultcode_t);
     71 
     72 #endif	/* _ASM */
     73 
     74 #ifdef	__cplusplus
     75 }
     76 #endif
     77 
     78 #endif	/* _VM_FAULTCODE_H */
     79