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: releng/9.0/sys/mips/include/trap.h 206717 2010-04-17 01:17:31Z jmallett $
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
76 struct 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 */
101 extern struct trapdebug trapdebug[TRAPSIZE], *trp;
102
103 void trapDump(char *msg);
104
105 #else
106
107 #define trapdebug_enter(x, cd)
108
109 #endif
110
111 void MipsFPTrap(u_int, u_int, u_int);
112 void MipsKernGenException(void);
113 void MipsKernIntr(void);
114 void MipsTLBInvalidException(void);
115 void MipsTLBMissException(void);
116 void MipsUserGenException(void);
117 void MipsUserIntr(void);
118
119 register_t trap(struct trapframe *);
120
121 #ifndef LOCORE /* XXX */
122 int check_address(void *);
123 void platform_trap_enter(void);
124 void platform_trap_exit(void);
125 #endif
126
127 #endif /* !_MACHINE_TRAP_H_ */
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