* Copyright (c) 1990 The Regents of the University of California.

/* $NetBSD: trap.h,v 1.25 2023/03/26 12:23:42 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. 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_XFCFLT 4 /* Customer reserved 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_KSPNOTVAL 15 /* kernel stack pointer not valid */
#define T_KDBTRAP 17 /* kernel debugger trap */

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

/* Section 6.4.1 Arithmetic Traps/Faults */
#define ATRP_INTOVF 0x1 /* integer overflow */
#define ATRP_INTDIV 0x2 /* integer divide by zero */
#define ATRP_FLTOVF 0x3 /* floating overflow */
#define ATRP_FLTDIV 0x4 /* floating/decimal divide by zero */
#define ATRP_FLTUND 0x5 /* floating underflow */
#define ATRP_DECOVF 0x6 /* decimal underflow */
#define ATRP_FLTSUB 0x7 /* subscript range */
#define AFLT_FLTOVF 0x8 /* floating overflow */
#define AFLT_FLTDIV 0x9 /* floating divide-by-zero */
#define AFLT_FLTUND 0xa /* floating underflow */

/* Used by RAS to detect an interrupted CAS */
#define CASMAGIC 0xFEDABABE /* always invalid space */

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

#ifndef _LOCORE
struct trapframe {
long tf_fp; /* Stack frame pointer */
long tf_ap; /* Argument pointer on user stack */
long tf_sp; /* Stack pointer */
long tf_r0; /* General registers saved upon trap/syscall */
long tf_r1;
long tf_r2;
long tf_r3;
long tf_r4;
long tf_r5;
long tf_r6;
long tf_r7;
long tf_r8;
long tf_r9;
long tf_r10;
long tf_r11;
long tf_trap; /* Type of trap */
long tf_code; /* Trap specific code */
long tf_pc; /* User pc */
long tf_psl; /* User psl */
};

#endif /* _LOCORE */

#endif /* _VAX_TRAP_H_ */