/*      $NetBSD: trap.h,v 1.10 1995/12/13 18:54:03 ragge Exp $     */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)trap.h	5.4 (Berkeley) 5/9/91
 */

/*
 * Trap type values
 * also known in trap.c for name strings
 */
#ifndef _VAX_TRAP_H_
#define _VAX_TRAP_H_

#define	T_RESADFLT	0	/* reserved addressing */
#define	T_PRIVINFLT	1	/* privileged instruction */
#define	T_RESOPFLT	2	/* reserved operand */
#define	T_BPTFLT	3	/* breakpoint instruction */
#define	T_SYSCALL	5	/* system call (kcall) */
#define	T_ARITHFLT	6	/* arithmetic trap */
#define	T_ASTFLT	7	/* system forced exception */
#define	T_PTELEN	8	/* Page table length exceeded */
#define	T_TRANSFLT	9	/* translation fault */
#define	T_TRCTRAP	10	/* trace trap */
/* #define	T_COMPAT	11	/* compatibility mode fault on VAX */
#define	T_ACCFLT	12	/* Access violation fault */
/* #define	T_TABLEFLT	13	/* page table fault */
/* #define	T_ALIGNFLT	14	/* alignment fault */
#define	T_KSPNOTVAL	15	/* kernel stack pointer not valid */
/* #define	T_BUSERR	16	/* bus error */
#define	T_KDBTRAP	17	/* kernel debugger trap */

/* #define	T_DIVIDE	18	/* integer divide fault */
/* #define	T_NMI		19	/* non-maskable trap */
/* #define	T_OFLOW		20	/* overflow trap */
/* #define	T_BOUND		21	/* bound instruction fault */
/* #define	T_DNA		22	/* device not available fault */
/* #define	T_DOUBLEFLT	23	/* double fault */
/* #define	T_FPOPFLT	24	/* fp coprocessor operand fetch fault */
/* #define	T_TSSFLT	25	/* invalid tss fault */
/* #define	T_SEGNPFLT	26	/* segment not present fault */
/* #define	T_STKFLT	27	/* stack fault */
/* #define	T_RESERVED	28	/* reserved fault base */

/* These gets ORed with the word for page handling routines */
#define	T_WRITE		0x80
#define	T_PTEFETCH	0x40

/* Trap's coming from user mode */
#define	T_USER	0x100

#ifndef ASSEMBLER
/* If we want to alter USP in some syscall, we do it with mtpr */
struct	trapframe {
	int	fp;	/* Stack frame pointer */
        int     ap;     /* Argument pointer on user stack */
        int     r0;     /* General registers saved upon trap/syscall */
        int     r1;
        int     r2;
        int     r3;
        int     r4;
        int     r5;
        int     r6;
        int     r7;
        int     r8;
        int     r9;
        int     r10;
        int     r11;
	int	trap;	/* Type of trap */
        u_int	code;   /* Trap specific code */
        u_int   pc;     /* User pc */
        u_int   psl;    /* User psl */
};

/*
 * This struct is used when setting up interrupt vectors dynamically.
 * It pushes a longword between 0-63 on the stack; this number is
 * normally used as the ctlr number on devices. This use effectively
 * limits the number of interruptable ctlrs on the unibus to 64.
 */
struct ivec_dsp {
	char	pushr; 		/* pushr */
	char	pushrarg;	/* $3f */
	char	pushl; 		/* pushl */
	char	pushlarg;	/* $? */
	char	nop;      	/* nop, for foolish gcc */
	char	calls[3]; 	/* calls $1,? */
	void	(*hoppaddr)();	/* jump for calls */
	char	popr;	  	/* popr $0x3f */
	char	poprarg;
	char	rei;      	/* rei */
	char	pad;		/* sizeof(struct ivec_dsp) == 16 */
};

#endif /* ASSEMBLER */

#endif _VAX_TRAP_H_