xref: /netbsd-src/sys/arch/vax/include/trap.h (revision 4344b95d5c1b1fae78f3677700bff64296914e2d)
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