1 /* $OpenBSD: trap.h,v 1.16 2014/04/09 21:10:34 miod 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 * 3. 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 */ 39 40 #ifndef _MIPS64_TRAP_H_ 41 #define _MIPS64_TRAP_H_ 42 43 /* 44 * Trap codes (ExcCode in the cause register); also known in trap.c for 45 * name strings. 46 */ 47 48 #define T_INT 0 /* Interrupt pending */ 49 #define T_TLB_MOD 1 /* TLB modified fault */ 50 #define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */ 51 #define T_TLB_ST_MISS 3 /* TLB miss on a store */ 52 #define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */ 53 #define T_ADDR_ERR_ST 5 /* Address error on a store */ 54 #define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */ 55 #define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */ 56 #define T_SYSCALL 8 /* System call */ 57 #define T_BREAK 9 /* Breakpoint */ 58 #define T_RES_INST 10 /* Reserved instruction exception */ 59 #define T_COP_UNUSABLE 11 /* Coprocessor unusable */ 60 #define T_OVFLOW 12 /* Arithmetic overflow */ 61 #define T_TRAP 13 /* Trap instruction */ 62 #define T_VCEI 14 /* R4k Virtual coherency instruction */ 63 #define T_FPE 15 /* Floating point exception */ 64 #define T_IWATCH 16 /* R4k Inst. Watch address reference */ 65 #define T_C2E 18 /* R5k Coprocessor 2 exception */ 66 #define T_MDMX 22 /* R5k MDMX unusable */ 67 #define T_DWATCH 23 /* Data Watch address reference */ 68 #define T_MCHECK 24 /* Machine check */ 69 #define T_CACHEERR 30 /* Cache error */ 70 #define T_VCED 31 /* R4k Virtual coherency data */ 71 72 #define T_USER 0x20 /* user-mode flag or'ed with type */ 73 74 /* 75 * Defines for trap handler catching kernel accessing memory. 76 */ 77 #define KT_COPYERR 1 /* User space copy error */ 78 #define KT_KCOPYERR 2 /* Kernel space copy error */ 79 #define KT_DDBERR 3 /* DDB access error */ 80 #define KT_GUARDERR 4 /* guarded access error */ 81 82 #ifndef _LOCORE 83 84 #if defined(DDB) || defined(DEBUG) 85 86 struct trapdebug { /* trap history buffer for debugging */ 87 register_t status; 88 register_t cause; 89 register_t vadr; 90 register_t pc; 91 register_t ra; 92 register_t sp; 93 u_int code; 94 u_int ipl; 95 }; 96 97 #define trapdebug_enter(ci, frame, cd) \ 98 do { \ 99 register_t sr = disableintr(); \ 100 u_long cpuid = ci->ci_cpuid; \ 101 struct trapdebug *t; \ 102 \ 103 t = trapdebug + TRAPSIZE * cpuid + trppos[cpuid]; \ 104 t->status = frame->sr; \ 105 t->cause = frame->cause; \ 106 t->vadr = frame->badvaddr; \ 107 t->pc = frame->pc; \ 108 t->sp = frame->sp; \ 109 t->ra = frame->ra; \ 110 t->ipl = frame->ipl; \ 111 t->code = cd; \ 112 if (++trppos[cpuid] == TRAPSIZE) \ 113 trppos[cpuid] = 0; \ 114 setsr(sr); \ 115 } while (0) 116 117 #define TRAPSIZE 10 /* Trap log buffer length */ 118 extern struct trapdebug trapdebug[MAXCPUS * TRAPSIZE]; 119 extern uint trppos[MAXCPUS]; 120 121 void trapDump(const char *, int (*)(const char *, ...)); 122 123 #else 124 #define trapdebug_enter(ci, frame, code) 125 #endif 126 #endif /* _LOCORE */ 127 128 #endif /* !_MIPS64_TRAP_H_ */ 129