1/*	$OpenBSD: trap.h,v 1.3 1999/01/27 04:46:06 imp Exp $	*/
2
3/*-
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department and Ralph Campbell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 *	from: Utah Hdr: trap.h 1.1 90/07/09
37 *	from: @(#)trap.h	8.1 (Berkeley) 6/10/93
38 *	JNPR: trap.h,v 1.3 2006/12/02 09:53:41 katta
39 * $FreeBSD$
40 */
41
42#ifndef _MACHINE_TRAP_H_
43#define	_MACHINE_TRAP_H_
44
45/*
46 * Trap codes also known in trap.c for name strings.
47 * Used for indexing so modify with care.
48 */
49
50#define	T_INT			0	/* Interrupt pending */
51#define	T_TLB_MOD		1	/* TLB modified fault */
52#define	T_TLB_LD_MISS		2	/* TLB miss on load or ifetch */
53#define	T_TLB_ST_MISS		3	/* TLB miss on a store */
54#define	T_ADDR_ERR_LD		4	/* Address error on a load or ifetch */
55#define	T_ADDR_ERR_ST		5	/* Address error on a store */
56#define	T_BUS_ERR_IFETCH	6	/* Bus error on an ifetch */
57#define	T_BUS_ERR_LD_ST		7	/* Bus error on a load or store */
58#define	T_SYSCALL		8	/* System call */
59#define	T_BREAK			9	/* Breakpoint */
60#define	T_RES_INST		10	/* Reserved instruction exception */
61#define	T_COP_UNUSABLE		11	/* Coprocessor unusable */
62#define	T_OVFLOW		12	/* Arithmetic overflow */
63#define	T_TRAP			13	/* Trap instruction */
64#define	T_VCEI			14	/* Virtual coherency instruction */
65#define	T_FPE			15	/* Floating point exception */
66#define	T_IWATCH		16	/* Inst. Watch address reference */
67#define T_C2E                   18      /* Exception from coprocessor 2 */
68#define	T_DWATCH		23	/* Data Watch address reference */
69#define T_MCHECK                24      /* Received an MCHECK */
70#define	T_VCED			31	/* Virtual coherency data */
71
72#define	T_USER			0x20	/* user-mode flag or'ed with type */
73
74#if !defined(SMP) && (defined(DDB) || defined(DEBUG))
75
76struct trapdebug {		/* trap history buffer for debugging */
77	register_t	status;
78	register_t	cause;
79	register_t	vadr;
80	register_t	pc;
81	register_t	ra;
82	register_t	sp;
83	register_t	code;
84};
85
86#define	trapdebug_enter(x, cd) {	\
87	register_t s = intr_disable();	\
88	trp->status = x->sr;		\
89	trp->cause = x->cause;		\
90	trp->vadr = x->badvaddr;	\
91	trp->pc = x->pc;		\
92	trp->sp = x->sp;		\
93	trp->ra = x->ra;		\
94	trp->code = cd;			\
95	if (++trp == &trapdebug[TRAPSIZE])	\
96		trp = trapdebug;	\
97	intr_restore(s);		\
98}
99
100#define	TRAPSIZE 10		/* Trap log buffer length */
101extern struct trapdebug trapdebug[TRAPSIZE], *trp;
102
103void trapDump(char *msg);
104
105#else
106
107#define	trapdebug_enter(x, cd)
108
109#endif
110
111void MipsFPTrap(u_int, u_int, u_int);
112void MipsKernGenException(void);
113void MipsKernIntr(void);
114void MipsTLBInvalidException(void);
115void MipsTLBMissException(void);
116void MipsUserGenException(void);
117void MipsUserIntr(void);
118
119register_t trap(struct trapframe *);
120
121#endif /* !_MACHINE_TRAP_H_ */
122