trap.h revision 330897 
1/*	$OpenBSD: trap.h,v 1.3 1999/01/27 04:46:06 imp Exp $	*/
2
3/*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 1988 University of Utah.
7 * Copyright (c) 1992, 1993
8 *	The Regents of the University of California.  All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * the Systems Programming Group of the University of Utah Computer
12 * Science Department and Ralph Campbell.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 *	from: Utah Hdr: trap.h 1.1 90/07/09
39 *	from: @(#)trap.h	8.1 (Berkeley) 6/10/93
40 *	JNPR: trap.h,v 1.3 2006/12/02 09:53:41 katta
41 * $FreeBSD: stable/11/sys/mips/include/trap.h 330897 2018-03-14 03:19:51Z eadler $
42 */
43
44#ifndef _MACHINE_TRAP_H_
45#define	_MACHINE_TRAP_H_
46
47/*
48 * Trap codes also known in trap.c for name strings.
49 * Used for indexing so modify with care.
50 */
51
52#define	T_INT			0	/* Interrupt pending */
53#define	T_TLB_MOD		1	/* TLB modified fault */
54#define	T_TLB_LD_MISS		2	/* TLB miss on load or ifetch */
55#define	T_TLB_ST_MISS		3	/* TLB miss on a store */
56#define	T_ADDR_ERR_LD		4	/* Address error on a load or ifetch */
57#define	T_ADDR_ERR_ST		5	/* Address error on a store */
58#define	T_BUS_ERR_IFETCH	6	/* Bus error on an ifetch */
59#define	T_BUS_ERR_LD_ST		7	/* Bus error on a load or store */
60#define	T_SYSCALL		8	/* System call */
61#define	T_BREAK			9	/* Breakpoint */
62#define	T_RES_INST		10	/* Reserved instruction exception */
63#define	T_COP_UNUSABLE		11	/* Coprocessor unusable */
64#define	T_OVFLOW		12	/* Arithmetic overflow */
65#define	T_TRAP			13	/* Trap instruction */
66#define	T_VCEI			14	/* Virtual coherency instruction */
67#define	T_FPE			15	/* Floating point exception */
68#define	T_IWATCH		16	/* Inst. Watch address reference */
69#define T_C2E                   18      /* Exception from coprocessor 2 */
70#define	T_DWATCH		23	/* Data Watch address reference */
71#define T_MCHECK                24      /* Received an MCHECK */
72#define	T_VCED			31	/* Virtual coherency data */
73
74#define	T_USER			0x20	/* user-mode flag or'ed with type */
75
76#if !defined(SMP) && (defined(DDB) || defined(DEBUG))
77
78struct trapdebug {		/* trap history buffer for debugging */
79	register_t	status;
80	register_t	cause;
81	register_t	vadr;
82	register_t	pc;
83	register_t	ra;
84	register_t	sp;
85	register_t	code;
86};
87
88#define	trapdebug_enter(x, cd) {	\
89	register_t s = intr_disable();	\
90	trp->status = x->sr;		\
91	trp->cause = x->cause;		\
92	trp->vadr = x->badvaddr;	\
93	trp->pc = x->pc;		\
94	trp->sp = x->sp;		\
95	trp->ra = x->ra;		\
96	trp->code = cd;			\
97	if (++trp == &trapdebug[TRAPSIZE])	\
98		trp = trapdebug;	\
99	intr_restore(s);		\
100}
101
102#define	TRAPSIZE 10		/* Trap log buffer length */
103extern struct trapdebug trapdebug[TRAPSIZE], *trp;
104
105void trapDump(char *msg);
106
107#else
108
109#define	trapdebug_enter(x, cd)
110
111#endif
112
113void MipsFPTrap(u_int, u_int, u_int);
114void MipsKernGenException(void);
115void MipsKernIntr(void);
116void MipsTLBInvalidException(void);
117void MipsTLBMissException(void);
118void MipsUserGenException(void);
119void MipsUserIntr(void);
120
121register_t trap(struct trapframe *);
122
123#endif /* !_MACHINE_TRAP_H_ */
124