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trap.h revision 1.16 
      1 /*	$NetBSD: trap.h,v 1.16 2011/02/08 20:20:19 rmind 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  * 3. 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  *
     38  *	@(#)trap.h	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 /*
     42  * Trap codes
     43  * also known in trap.c for name strings
     44  */
     45 
     46 #define T_INT			0	/* Interrupt pending */
     47 #define T_TLB_MOD		1	/* TLB modified fault */
     48 #define T_TLB_LD_MISS		2	/* TLB miss on load or ifetch */
     49 #define T_TLB_ST_MISS		3	/* TLB miss on a store */
     50 #define T_ADDR_ERR_LD		4	/* Address error on a load or ifetch */
     51 #define T_ADDR_ERR_ST		5	/* Address error on a store */
     52 #define T_BUS_ERR_IFETCH	6	/* Bus error on an ifetch */
     53 #define T_BUS_ERR_LD_ST		7	/* Bus error on a load or store */
     54 #define T_SYSCALL		8	/* System call */
     55 #define T_BREAK			9	/* Breakpoint */
     56 #define T_RES_INST		10	/* Reserved instruction exception */
     57 #define T_COP_UNUSABLE		11	/* Coprocessor unusable */
     58 #define T_OVFLOW		12	/* Arithmetic overflow */
     59 
     60 /*
     61  * Trap definitions added for r4000 port.
     62  */
     63 #define	T_TRAP			13	/* Trap instruction */
     64 #define	T_VCEI			14	/* Virtual coherency exception */
     65 #define	T_FPE			15	/* Floating point exception */
     66 #define	T_WATCH			23	/* Watch address reference */
     67 #define T_VCED			31	/* Virtual coherency data */
     68 
     69 #define	T_USER			0x20	/* user-mode flag or'ed with type */
     70