The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/trap.h

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    1 /*      $OpenBSD: trap.h,v 1.3 1999/01/27 04:46:06 imp Exp $    */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-3-Clause
    5  *
    6  * Copyright (c) 1988 University of Utah.
    7  * Copyright (c) 1992, 1993
    8  *      The Regents of the University of California.  All rights reserved.
    9  *
   10  * This code is derived from software contributed to Berkeley by
   11  * the Systems Programming Group of the University of Utah Computer
   12  * Science Department and Ralph Campbell.
   13  *
   14  * Redistribution and use in source and binary forms, with or without
   15  * modification, are permitted provided that the following conditions
   16  * are met:
   17  * 1. Redistributions of source code must retain the above copyright
   18  *    notice, this list of conditions and the following disclaimer.
   19  * 2. Redistributions in binary form must reproduce the above copyright
   20  *    notice, this list of conditions and the following disclaimer in the
   21  *    documentation and/or other materials provided with the distribution.
   22  * 3. Neither the name of the University nor the names of its contributors
   23  *    may be used to endorse or promote products derived from this software
   24  *    without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  *
   38  *      from: Utah Hdr: trap.h 1.1 90/07/09
   39  *      from: @(#)trap.h        8.1 (Berkeley) 6/10/93
   40  *      JNPR: trap.h,v 1.3 2006/12/02 09:53:41 katta
   41  * $FreeBSD$
   42  */
   43 
   44 #ifndef _MACHINE_TRAP_H_
   45 #define _MACHINE_TRAP_H_
   46 
   47 /*
   48  * Trap codes also known in trap.c for name strings.
   49  * Used for indexing so modify with care.
   50  */
   51 
   52 #define T_INT                   0       /* Interrupt pending */
   53 #define T_TLB_MOD               1       /* TLB modified fault */
   54 #define T_TLB_LD_MISS           2       /* TLB miss on load or ifetch */
   55 #define T_TLB_ST_MISS           3       /* TLB miss on a store */
   56 #define T_ADDR_ERR_LD           4       /* Address error on a load or ifetch */
   57 #define T_ADDR_ERR_ST           5       /* Address error on a store */
   58 #define T_BUS_ERR_IFETCH        6       /* Bus error on an ifetch */
   59 #define T_BUS_ERR_LD_ST         7       /* Bus error on a load or store */
   60 #define T_SYSCALL               8       /* System call */
   61 #define T_BREAK                 9       /* Breakpoint */
   62 #define T_RES_INST              10      /* Reserved instruction exception */
   63 #define T_COP_UNUSABLE          11      /* Coprocessor unusable */
   64 #define T_OVFLOW                12      /* Arithmetic overflow */
   65 #define T_TRAP                  13      /* Trap instruction */
   66 #define T_VCEI                  14      /* Virtual coherency instruction */
   67 #define T_FPE                   15      /* Floating point exception */
   68 #define T_IWATCH                16      /* Inst. Watch address reference */
   69 #define T_C2E                   18      /* Exception from coprocessor 2 */
   70 #define T_DWATCH                23      /* Data Watch address reference */
   71 #define T_MCHECK                24      /* Received an MCHECK */
   72 #define T_VCED                  31      /* Virtual coherency data */
   73 
   74 #define T_USER                  0x20    /* user-mode flag or'ed with type */
   75 
   76 #if !defined(SMP) && (defined(DDB) || defined(DEBUG))
   77 
   78 struct trapdebug {              /* trap history buffer for debugging */
   79         register_t      status;
   80         register_t      cause;
   81         register_t      vadr;
   82         register_t      pc;
   83         register_t      ra;
   84         register_t      sp;
   85         register_t      code;
   86 };
   87 
   88 #define trapdebug_enter(x, cd) {        \
   89         register_t s = intr_disable();  \
   90         trp->status = x->sr;            \
   91         trp->cause = x->cause;          \
   92         trp->vadr = x->badvaddr;        \
   93         trp->pc = x->pc;                \
   94         trp->sp = x->sp;                \
   95         trp->ra = x->ra;                \
   96         trp->code = cd;                 \
   97         if (++trp == &trapdebug[TRAPSIZE])      \
   98                 trp = trapdebug;        \
   99         intr_restore(s);                \
  100 }
  101 
  102 #define TRAPSIZE 10             /* Trap log buffer length */
  103 extern struct trapdebug trapdebug[TRAPSIZE], *trp; 
  104 
  105 void trapDump(char *msg);
  106 
  107 #else
  108 
  109 #define trapdebug_enter(x, cd)
  110 
  111 #endif
  112 
  113 void MipsFPTrap(u_int, u_int, u_int);
  114 void MipsKernGenException(void);
  115 void MipsKernIntr(void);
  116 void MipsKStackOverflow(void);
  117 void MipsTLBInvalidException(void);
  118 void MipsTLBMissException(void);
  119 void MipsUserGenException(void);
  120 void MipsUserIntr(void);
  121 
  122 register_t trap(struct trapframe *);
  123 
  124 #endif /* !_MACHINE_TRAP_H_ */

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