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trap.h revision 1.16 
      1 /*      $NetBSD: trap.h,v 1.16 1997/07/28 21:48:36 ragge Exp $     */
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * William Jolitz.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. 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  *	@(#)trap.h	5.4 (Berkeley) 5/9/91
     39  */
     40 
     41 /*
     42  * Trap type values
     43  * also known in trap.c for name strings
     44  */
     45 #ifndef _VAX_TRAP_H_
     46 #define _VAX_TRAP_H_
     47 
     48 #define	T_RESADFLT	0	/* reserved addressing */
     49 #define	T_PRIVINFLT	1	/* privileged instruction */
     50 #define	T_RESOPFLT	2	/* reserved operand */
     51 #define	T_BPTFLT	3	/* breakpoint instruction */
     52 #define	T_XFCFLT	4	/* Customer reserved instruction */
     53 #define	T_SYSCALL	5	/* system call (kcall) */
     54 #define	T_ARITHFLT	6	/* arithmetic trap */
     55 #define	T_ASTFLT	7	/* system forced exception */
     56 #define	T_PTELEN	8	/* Page table length exceeded */
     57 #define	T_TRANSFLT	9	/* translation fault */
     58 #define	T_TRCTRAP	10	/* trace trap */
     59 #define	T_COMPAT	11	/* compatibility mode fault on VAX */
     60 #define	T_ACCFLT	12	/* Access violation fault */
     61 #define	T_KSPNOTVAL	15	/* kernel stack pointer not valid */
     62 #define	T_KDBTRAP	17	/* kernel debugger trap */
     63 
     64 /* These gets ORed with the word for page handling routines */
     65 #define	T_WRITE		0x80
     66 #define	T_PTEFETCH	0x40
     67 
     68 /* Trap's coming from user mode */
     69 #define	T_USER	0x100
     70 
     71 #ifndef _LOCORE
     72 struct	trapframe {
     73 	long	fp;	/* Stack frame pointer */
     74 	long	ap;     /* Argument pointer on user stack */
     75 	long	sp;	/* Stack pointer */
     76 	long	r0;     /* General registers saved upon trap/syscall */
     77 	long	r1;
     78 	long	r2;
     79 	long	r3;
     80 	long	r4;
     81 	long	r5;
     82 	long	r6;
     83 	long	r7;
     84 	long	r8;
     85 	long	r9;
     86 	long	r10;
     87 	long	r11;
     88 	long	trap;	/* Type of trap */
     89         long	code;   /* Trap specific code */
     90         long	pc;     /* User pc */
     91         long	psl;    /* User psl */
     92 };
     93 
     94 /*
     95  * This struct is used when setting up interrupt vectors dynamically.
     96  * It pushes a longword between 0-63 on the stack; this number is
     97  * normally used as the ctlr number on devices. This use effectively
     98  * limits the number of interruptable ctlrs on one unibus to 64.
     99  */
    100 struct ivec_dsp {
    101 	char	pushr; 		/* pushr */
    102 	char	pushrarg;	/* $3f */
    103 	char	pushl; 		/* pushl */
    104 	char	pushlarg;	/* $? */
    105 	char	nop;      	/* nop, for foolish gcc */
    106 	char	calls[3]; 	/* calls $1,? */
    107 	void	(*hoppaddr) __P((int));	/* jump for calls */
    108 	char	popr;	  	/* popr $0x3f */
    109 	char	poprarg;
    110 	char	rei;      	/* rei */
    111 	char	pad;		/* sizeof(struct ivec_dsp) == 16 */
    112 };
    113 
    114 extern	struct ivec_dsp idsptch;
    115 
    116 #endif /* _LOCORE */
    117 
    118 #endif _VAX_TRAP_H_
    119