trap.h revision 202031
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: head/sys/mips/include/trap.h 202031 2010-01-10 19:50:24Z imp $ 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 76struct trapdebug { /* trap history buffer for debugging */ 77 u_int status; 78 u_int cause; 79 u_int vadr; 80 u_int pc; 81 u_int ra; 82 u_int sp; 83 u_int code; 84}; 85 86#define trapdebug_enter(x, cd) { \ 87 intrmask_t s = disableintr(); \ 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 restoreintr(s); \ 98} 99 100#define TRAPSIZE 10 /* Trap log buffer length */ 101extern struct trapdebug trapdebug[TRAPSIZE], *trp; 102 103void trapDump(char *msg); 104 105#else 106 107#define trapdebug_enter(x, cd) 108 109#endif 110 111void MipsFPTrap(u_int, u_int, u_int); 112void MipsKernGenException(void); 113void MipsKernIntr(void); 114void MipsKernTLBInvalidException(void); 115void MipsTLBInvalidException(void); 116void MipsTLBMissException(void); 117void MipsUserGenException(void); 118void MipsUserIntr(void); 119void MipsUserTLBInvalidException(void); 120 121u_int trap(struct trapframe *); 122 123#ifndef LOCORE /* XXX */ 124int check_address(void *); 125void platform_trap_enter(void); 126void platform_trap_exit(void); 127#endif 128 129#endif /* !_MACHINE_TRAP_H_ */ 130