1/* $NetBSD: trap.h,v 1.20 2021/01/24 07:36:54 mrg Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)trap.h 8.1 (Berkeley) 6/11/93
41 */
42/*
43 * Sun4m support by Aaron Brown, Harvard University.
44 * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
45 * All rights reserved.
46 */
47
48#ifndef _MACHINE_TRAP_H
49#define _MACHINE_TRAP_H
50
51/* trap vec (pri) description */
52#define T_RESET 0x00 /* (1) not actually vectored; jumps to 0 */
53#define T_TEXTFAULT 0x01 /* (2) address fault during instr fetch */
54#define T_ILLINST 0x02 /* (3) illegal instruction */
55#define T_PRIVINST 0x03 /* (4) privileged instruction */
56#define T_FPDISABLED 0x04 /* (5) fp instr while fp disabled */
57#define T_WINOF 0x05 /* (6) register window overflow */
58#define T_WINUF 0x06 /* (7) register window underflow */
59#define T_ALIGN 0x07 /* (8) address not properly aligned */
60#define T_FPE 0x08 /* (9) floating point exception */
61#define T_DATAFAULT 0x09 /* (10) address fault during data fetch */
62#define T_TAGOF 0x0a /* (11) tag overflow */
63/* 0x0b unused */
64/* 0x0c unused */
65/* 0x0d unused */
66/* 0x0e unused */
67/* 0x0f unused */
68/* 0x10 unused */
69#define T_L1INT 0x11 /* (27) level 1 interrupt */
70#define T_L2INT 0x12 /* (26) level 2 interrupt */
71#define T_L3INT 0x13 /* (25) level 3 interrupt */
72#define T_L4INT 0x14 /* (24) level 4 interrupt */
73#define T_L5INT 0x15 /* (23) level 5 interrupt */
74#define T_L6INT 0x16 /* (22) level 6 interrupt */
75#define T_L7INT 0x17 /* (21) level 7 interrupt */
76#define T_L8INT 0x18 /* (20) level 8 interrupt */
77#define T_L9INT 0x19 /* (19) level 9 interrupt */
78#define T_L10INT 0x1a /* (18) level 10 interrupt */
79#define T_L11INT 0x1b /* (17) level 11 interrupt */
80#define T_L12INT 0x1c /* (16) level 12 interrupt */
81#define T_L13INT 0x1d /* (15) level 13 interrupt */
82#define T_L14INT 0x1e /* (14) level 14 interrupt */
83#define T_L15INT 0x1f /* (13) level 15 interrupt */
84/* 0x20 unused */
85#define T_TEXTERROR 0x21 /* (3) address fault during instr fetch */
86/* 0x22 unused */
87/* 0x23 unused */
88#define T_CPDISABLED 0x24 /* (5) coprocessor instr while disabled */
89#define T_UNIMPLFLUSH 0x25 /* Unimplemented FLUSH */
90/* through 0x27 unused */
91#define T_CPEXCEPTION 0x28 /* (11) coprocessor exception */
92#define T_DATAERROR 0x29 /* (12) address error during data fetch */
93#define T_IDIV0 0x2a /* divide by zero (from hw [su]div instr) */
94#define T_STOREBUFFAULT 0x2b /* SuperSPARC: Store buffer copy-back fault */
95/* 0x2c unused */
96/* through 0x7f unused */
97
98/* beginning of `user' vectors (from trap instructions) - all priority 12 */
99#define T_SUN_SYSCALL 0x80 /* system call */
100#define T_BREAKPOINT 0x81 /* breakpoint `instruction' */
101#define T_DIV0 0x82 /* explicitly signal division by zero */
102#define T_FLUSHWIN 0x83 /* flush windows */
103#define T_CLEANWIN 0x84 /* request new windows to be cleaned */
104#define T_RANGECHECK 0x85 /* explicitly signal a range checking error */
105#define T_FIXALIGN 0x86 /* fix up unaligned accesses */
106#define T_INTOF 0x87 /* explicitly signal integer overflow */
107
108/* 0x89..0x8f - reserved for the OS */
109#define T_BSD_SYSCALL 0x89 /* BSD system call */
110#define T_KGDB_EXEC 0x8a /* for kernel gdb */
111#define T_DBPAUSE 0x8b /* for smp kernel debugging */
112
113/* 0x90..0x9f - reserved, will never be specified */
114
115/* 0xa0..0xff are currently unallocated */
116
117#ifdef _KERNEL /* pseudo traps for locore.s */
118#define T_RWRET -1 /* need first user window for trap return */
119#define T_AST -2 /* no-op, just needed reschedule or profile */
120#endif
121
122/* flags to system call (flags in %g1 along with syscall number) */
123#define SYSCALL_G2RFLAG 0x400 /* on success, return to %g2 rather than npc */
124#define SYSCALL_G7RFLAG 0x800 /* use %g7 as above (deprecated) */
125#define SYSCALL_G5RFLAG 0xc00 /* use %g5 as above (only ABI compatible way) */
126
127/*
128 * `software trap' macros to keep people happy (sparc v8 manual says not
129 * to set the upper bits).
130 */
131#define ST_SYSCALL (T_SUN_SYSCALL & 0x7f)
132#define ST_BREAKPOINT (T_BREAKPOINT & 0x7f)
133#define ST_DIV0 (T_DIV0 & 0x7f)
134#define ST_FLUSHWIN (T_FLUSHWIN & 0x7f)
135
136#if defined(_KERNEL) && !defined(_LOCORE)
137extern const char *trap_type[];
138extern struct fpstate initfpstate;
139#endif
140
141#endif /* _MACHINE_TRAP_H_ */