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  * Copyright (c) 1988 University of Utah.
    5  * Copyright (c) 1992, 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * This code is derived from software contributed to Berkeley by
    9  * the Systems Programming Group of the University of Utah Computer
   10  * Science Department and Ralph Campbell.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 4. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  *      from: Utah Hdr: trap.h 1.1 90/07/09
   37  *      from: @(#)trap.h        8.1 (Berkeley) 6/10/93
   38  *      JNPR: trap.h,v 1.3 2006/12/02 09:53:41 katta
   39  * $FreeBSD: stable/8/sys/mips/include/trap.h 215938 2010-11-27 12:26:40Z jchandra $
   40  */
   41 
   42 #ifndef _MACHINE_TRAP_H_
   43 #define _MACHINE_TRAP_H_
   44 
   45 /*
   46  * Trap codes also known in trap.c for name strings.
   47  * Used for indexing so modify with care.
   48  */
   49 
   50 #define T_INT                   0       /* Interrupt pending */
   51 #define T_TLB_MOD               1       /* TLB modified fault */
   52 #define T_TLB_LD_MISS           2       /* TLB miss on load or ifetch */
   53 #define T_TLB_ST_MISS           3       /* TLB miss on a store */
   54 #define T_ADDR_ERR_LD           4       /* Address error on a load or ifetch */
   55 #define T_ADDR_ERR_ST           5       /* Address error on a store */
   56 #define T_BUS_ERR_IFETCH        6       /* Bus error on an ifetch */
   57 #define T_BUS_ERR_LD_ST         7       /* Bus error on a load or store */
   58 #define T_SYSCALL               8       /* System call */
   59 #define T_BREAK                 9       /* Breakpoint */
   60 #define T_RES_INST              10      /* Reserved instruction exception */
   61 #define T_COP_UNUSABLE          11      /* Coprocessor unusable */
   62 #define T_OVFLOW                12      /* Arithmetic overflow */
   63 #define T_TRAP                  13      /* Trap instruction */
   64 #define T_VCEI                  14      /* Virtual coherency instruction */
   65 #define T_FPE                   15      /* Floating point exception */
   66 #define T_IWATCH                16      /* Inst. Watch address reference */
   67 #define T_C2E                   18      /* Exception from coprocessor 2 */
   68 #define T_DWATCH                23      /* Data Watch address reference */
   69 #define T_MCHECK                24      /* Received an MCHECK */
   70 #define T_VCED                  31      /* Virtual coherency data */
   71 
   72 #define T_USER                  0x20    /* user-mode flag or'ed with type */
   73 
   74 #if !defined(SMP) && (defined(DDB) || defined(DEBUG))
   75 
   76 struct trapdebug {              /* trap history buffer for debugging */
   77         register_t      status;
   78         register_t      cause;
   79         register_t      vadr;
   80         register_t      pc;
   81         register_t      ra;
   82         register_t      sp;
   83         register_t      code;
   84 };
   85 
   86 #define trapdebug_enter(x, cd) {        \
   87         register_t s = intr_disable();  \
   88         trp->status = x->sr;            \
   89         trp->cause = x->cause;          \
   90         trp->vadr = x->badvaddr;        \
   91         trp->pc = x->pc;                \
   92         trp->sp = x->sp;                \
   93         trp->ra = x->ra;                \
   94         trp->code = cd;                 \
   95         if (++trp == &trapdebug[TRAPSIZE])      \
   96                 trp = trapdebug;        \
   97         intr_restore(s);                \
   98 }
   99 
  100 #define TRAPSIZE 10             /* Trap log buffer length */
  101 extern struct trapdebug trapdebug[TRAPSIZE], *trp; 
  102 
  103 void trapDump(char *msg);
  104 
  105 #else
  106 
  107 #define trapdebug_enter(x, cd)
  108 
  109 #endif
  110 
  111 void MipsFPTrap(u_int, u_int, u_int);
  112 void MipsKernGenException(void);
  113 void MipsKernIntr(void);
  114 void MipsTLBInvalidException(void);
  115 void MipsTLBMissException(void);
  116 void MipsUserGenException(void);
  117 void MipsUserIntr(void);
  118 
  119 register_t trap(struct trapframe *);
  120 
  121 #ifndef LOCORE /* XXX */
  122 int check_address(void *);
  123 void platform_trap_enter(void);
  124 void platform_trap_exit(void);
  125 #endif
  126 
  127 #endif /* !_MACHINE_TRAP_H_ */

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