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      1 /*      $NetBSD: trap.h,v 1.25 2023/03/26 12:23:42 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. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)trap.h	5.4 (Berkeley) 5/9/91
     35  */
     36 
     37 /*
     38  * Trap type values
     39  * also known in trap.c for name strings
     40  */
     41 #ifndef _VAX_TRAP_H_
     42 #define _VAX_TRAP_H_
     43 
     44 #define	T_RESADFLT	0	/* reserved addressing */
     45 #define	T_PRIVINFLT	1	/* privileged instruction */
     46 #define	T_RESOPFLT	2	/* reserved operand */
     47 #define	T_BPTFLT	3	/* breakpoint instruction */
     48 #define	T_XFCFLT	4	/* Customer reserved instruction */
     49 #define	T_SYSCALL	5	/* system call (kcall) */
     50 #define	T_ARITHFLT	6	/* arithmetic trap */
     51 #define	T_ASTFLT	7	/* system forced exception */
     52 #define	T_PTELEN	8	/* Page table length exceeded */
     53 #define	T_TRANSFLT	9	/* translation fault */
     54 #define	T_TRCTRAP	10	/* trace trap */
     55 #define	T_COMPAT	11	/* compatibility mode fault on VAX */
     56 #define	T_ACCFLT	12	/* Access violation fault */
     57 #define	T_KSPNOTVAL	15	/* kernel stack pointer not valid */
     58 #define	T_KDBTRAP	17	/* kernel debugger trap */
     59 
     60 /* These gets ORed with the word for page handling routines */
     61 #define	T_WRITE		0x80
     62 #define	T_PTEFETCH	0x40
     63 
     64 /* Section 6.4.1 Arithmetic Traps/Faults */
     65 #define ATRP_INTOVF	0x1	/* integer overflow */
     66 #define ATRP_INTDIV	0x2	/* integer divide by zero */
     67 #define ATRP_FLTOVF	0x3	/* floating overflow */
     68 #define ATRP_FLTDIV	0x4	/* floating/decimal divide by zero */
     69 #define ATRP_FLTUND	0x5	/* floating underflow */
     70 #define ATRP_DECOVF	0x6	/* decimal underflow */
     71 #define ATRP_FLTSUB	0x7	/* subscript range */
     72 #define	AFLT_FLTOVF	0x8	/* floating overflow */
     73 #define	AFLT_FLTDIV	0x9	/* floating divide-by-zero */
     74 #define	AFLT_FLTUND	0xa	/* floating underflow */
     75 
     76 /* Used by RAS to detect an interrupted CAS */
     77 #define	CASMAGIC	0xFEDABABE /* always invalid space */
     78 
     79 /* Trap's coming from user mode */
     80 #define	T_USER	0x100
     81 
     82 #ifndef _LOCORE
     83 struct	trapframe {
     84 	long	tf_fp;	/* Stack frame pointer */
     85 	long	tf_ap;     /* Argument pointer on user stack */
     86 	long	tf_sp;	/* Stack pointer */
     87 	long	tf_r0;     /* General registers saved upon trap/syscall */
     88 	long	tf_r1;
     89 	long	tf_r2;
     90 	long	tf_r3;
     91 	long	tf_r4;
     92 	long	tf_r5;
     93 	long	tf_r6;
     94 	long	tf_r7;
     95 	long	tf_r8;
     96 	long	tf_r9;
     97 	long	tf_r10;
     98 	long	tf_r11;
     99 	long	tf_trap;	/* Type of trap */
    100         long	tf_code;   /* Trap specific code */
    101         long	tf_pc;     /* User pc */
    102         long	tf_psl;    /* User psl */
    103 };
    104 
    105 #endif /* _LOCORE */
    106 
    107 #endif /* _VAX_TRAP_H_ */
    108