trap.h revision 1.1
1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 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 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)trap.h 8.1 (Berkeley) 6/11/93 43 * 44 * from: Header: trap.h,v 1.9 92/11/26 02:04:47 torek Exp 45 * $Id: trap.h,v 1.1 1993/10/02 10:23:30 deraadt Exp $ 46 */ 47 48#ifndef _MACHINE_TRAP_H 49#define _MACHINE_TRAP_H 50/* 51 * 52 * The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits 53 * of the trap vector table. The next eight bits are supplied by the 54 * hardware when the trap occurs, and the bottom four bits are always 55 * zero (so that we can shove up to 16 bytes of executable code---exactly 56 * four instructions---into each trap vector). 57 * 58 * The hardware allocates half the trap vectors to hardware and half to 59 * software. 60 * 61 * Traps have priorities assigned (lower number => higher priority). 62 */ 63 64#if defined(KERNEL) && !defined(LOCORE) 65struct trapvec { 66 int tv_instr[4]; /* the four instructions */ 67}; 68extern struct trapvec trapbase[256]; /* the 256 vectors */ 69#endif 70 71/* trap vec (pri) description */ 72#define T_RESET 0x00 /* (1) not actually vectored; jumps to 0 */ 73#define T_TEXTFAULT 0x01 /* (2) address fault during instr fetch */ 74#define T_ILLINST 0x02 /* (3) illegal instruction */ 75#define T_PRIVINST 0x03 /* (4) privileged instruction */ 76#define T_FPDISABLED 0x04 /* (5) fp instr while fp disabled */ 77#define T_WINOF 0x05 /* (6) register window overflow */ 78#define T_WINUF 0x06 /* (7) register window underflow */ 79#define T_ALIGN 0x07 /* (8) address not properly aligned */ 80#define T_FPE 0x08 /* (9) floating point exception */ 81#define T_DATAFAULT 0x09 /* (10) address fault during data fetch */ 82#define T_TAGOF 0x0a /* (11) tag overflow */ 83/* 0x0b unused */ 84/* 0x0c unused */ 85/* 0x0d unused */ 86/* 0x0e unused */ 87/* 0x0f unused */ 88/* 0x10 unused */ 89#define T_L1INT 0x11 /* (27) level 1 interrupt */ 90#define T_L2INT 0x12 /* (26) level 2 interrupt */ 91#define T_L3INT 0x13 /* (25) level 3 interrupt */ 92#define T_L4INT 0x14 /* (24) level 4 interrupt */ 93#define T_L5INT 0x15 /* (23) level 5 interrupt */ 94#define T_L6INT 0x16 /* (22) level 6 interrupt */ 95#define T_L7INT 0x17 /* (21) level 7 interrupt */ 96#define T_L8INT 0x18 /* (20) level 8 interrupt */ 97#define T_L9INT 0x19 /* (19) level 9 interrupt */ 98#define T_L10INT 0x1a /* (18) level 10 interrupt */ 99#define T_L11INT 0x1b /* (17) level 11 interrupt */ 100#define T_L12INT 0x1c /* (16) level 12 interrupt */ 101#define T_L13INT 0x1d /* (15) level 13 interrupt */ 102#define T_L14INT 0x1e /* (14) level 14 interrupt */ 103#define T_L15INT 0x1f /* (13) level 15 interrupt */ 104/* 0x20 unused */ 105/* through 0x23 unused */ 106#define T_CPDISABLED 0x24 /* (5) coprocessor instr while disabled */ 107/* 0x25 unused */ 108/* through 0x27 unused */ 109#define T_CPEXCEPTION 0x28 /* (9) coprocessor exception */ 110/* 0x29 unused */ 111/* through 0x7f unused */ 112 113/* beginning of `user' vectors (from trap instructions) - all priority 12 */ 114#define T_SUN_SYSCALL 0x80 /* system call */ 115#define T_BREAKPOINT 0x81 /* breakpoint `instruction' */ 116#define T_DIV0 0x82 /* division routine was handed 0 */ 117#define T_FLUSHWIN 0x83 /* flush windows */ 118#define T_CLEANWIN 0x84 /* provide clean windows */ 119#define T_RANGECHECK 0x85 /* ? */ 120#define T_FIXALIGN 0x86 /* fix up unaligned accesses */ 121#define T_INTOF 0x87 /* integer overflow ? */ 122#define T_KGDB_EXEC 0x88 /* for kernel gdb */ 123#define T_BSD_SYSCALL 0x89 /* BSD system call */ 124 125/* 0x8a..0xff are currently unallocated */ 126 127#ifdef KERNEL /* pseudo traps for locore.s */ 128#define T_RWRET -1 /* need first user window for trap return */ 129#define T_AST -2 /* no-op, just needed reschedule or profile */ 130#endif 131 132/* flags to system call (flags in %g1 along with syscall number) */ 133#define SYSCALL_G2RFLAG 0x400 /* on success, return to %g2 rather than npc */ 134#define SYSCALL_G7RFLAG 0x800 /* use %g7 as above (deprecated) */ 135 136/* 137 * `software trap' macros to keep people happy (sparc v8 manual says not 138 * to set the upper bits). 139 */ 140#define ST_BREAKPOINT (T_BREAKPOINT & 0x7f) 141#define ST_DIV0 (T_DIV0 & 0x7f) 142#define ST_FLUSHWIN (T_FLUSHWIN & 0x7f) 143#define ST_SYSCALL (T_BSD_SYSCALL & 0x7f) 144 145#endif /* _MACHINE_TRAP_H_ */ 146