usr/src/uts/sun4/sys/fpras.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 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_FPRAS_H
  28 #define _SYS_FPRAS_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * The following identify copy operations using the fpras mechanism.
  38  * They are used in array indexing so keep them sequential.
  39  */
  40 #define FPRAS_BCOPY     0
  41 #define FPRAS_COPYIN    1
  42 #define FPRAS_COPYOUT   2
  43 #define FPRAS_PGCOPY    3
  44 #define FPRAS_NCOPYOPS  (FPRAS_PGCOPY + 1)
  45
  46 /*
  47  * Identifying where fpras_failure was called from.
  48  */
  49 #define FPRAS_FROMCHKFN 0
  50 #define FPRAS_FROMTRAP  1
  51
  52 /*
  53  * Return values from a check function.
  54  */
  55 #define FPRAS_OK        0
  56 #define FPRAS_BADCALC   1
  57 #define FPRAS_BADTRAP   2
  58
  59 #if !defined(_ASM)
  60
  61 /*
  62  * Set if an architecture/cpu combination implements fpRAS.
  63  */
  64 extern int fpras_implemented;
  65
  66 /*
  67  * Set in /etc/system to disable fpRAS mechanism at reboot.
  68  * Changing this value on a live system may have no effect (eg, if an
  69  * implementation checks only at startup).
  70  */
  71 extern int fpras_disable;
  72
  73 /*
  74  * Set in /etc/system to disable checking of particular copy operations.  Set
  75  * bit N to disable checking of the corresponding copy operation (eg, bit 2
  76  * for copyout).  Changing this value on a live system may have no effect.
  77  */
  78 extern int fpras_disableids;
  79
  80 /*
  81  * Function called from a check function to indicate an incorrect result
  82  * was obtained and from trap handlers to determine if the trap was due to
  83  * an fpRAS failure.  Symbol only appears for architecture/cpu combinations
  84  * that implement fpRAS.
  85  */
  86 #pragma weak fpras_chktrap
  87 struct regs;
  88 extern int fpras_chktrap(struct regs *);
  89 extern int fpras_failure(int, int);
  90
  91 #endif  /* !_ASM */
  92
  93 #ifdef  __cplusplus
  94 }
  95 #endif
  96
  97 #endif  /* _SYS_FPRAS_H */