usr/src/uts/common/vm/faultcode.h

   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 */