usr/src/lib/libbc/inc/include/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, 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
  52 typedef int     faultcode_t;    /* type returned by vm fault routines */
  53 #endif  /* LOCORE */
  54
  55 #endif /* !_vm_faultcode_h */