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 1.2 1993/11/10 03:13:19 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) 65 struct trapvec { 66 int tv_instr[4]; /* the four instructions */ 67 }; 68 extern 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_SUN_SYSCALL & 0x7f) 144 145 #endif /* _MACHINE_TRAP_H_ */ 146