xref: /illumos-gate/usr/src/uts/common/vm/faultcode.h (revision b4203d757c7c247e39c94c09a94021a3a8121062)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved	*/

/*
 * University Copyright- Copyright (c) 1982, 1986, 1988
 * The Regents of the University of California
 * All Rights Reserved
 *
 * University Acknowledgment- Portions of this document are derived from
 * software developed by the University of California, Berkeley, and its
 * contributors.
 */

#ifndef	_VM_FAULTCODE_H
#define	_VM_FAULTCODE_H

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * This file describes the data type returned by vm routines
 * which handle faults.
 *
 * If FC_CODE(fc) == FC_OBJERR, then FC_ERRNO(fc) contains the errno value
 * returned by the underlying object mapped at the fault address.
 */
#define	FC_HWERR	0x1	/* misc hardware error (e.g. bus timeout) */
#define	FC_ALIGN	0x2	/* hardware alignment error */
#define	FC_OBJERR	0x3	/* underlying object returned errno value */
#define	FC_PROT		0x4	/* access exceeded current protections */
#define	FC_NOMAP	0x5	/* no mapping at the fault address */
#define	FC_NOSUPPORT	0x6	/* operation not supported by driver */

#define	FC_MAKE_ERR(e)	(((e) << 8) | FC_OBJERR)

#define	FC_CODE(fc)	((fc) & 0xff)
#define	FC_ERRNO(fc)	((unsigned)(fc) >> 8)

#ifndef	_ASM
typedef	int	faultcode_t;	/* type returned by vm fault routines */

extern int fc_decode(faultcode_t);

#endif	/* _ASM */

#ifdef	__cplusplus
}
#endif

#endif	/* _VM_FAULTCODE_H */