faults.hh revision 2174
1/* 2 * Copyright (c) 2003-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#ifndef __FAULTS_HH__ 30#define __FAULTS_HH__ 31 32#include "base/refcnt.hh" 33#include "sim/stats.hh" 34#include "config/full_system.hh" 35 36class ExecContext; 37class FaultBase; 38typedef RefCountingPtr<FaultBase> Fault; 39 40typedef const char * FaultName; 41typedef Stats::Scalar<> FaultStat; 42 43// Each class has it's name statically define in _name, 44// and has a virtual function to access it's name. 45// The function is necessary because otherwise, all objects 46// which are being accessed cast as a FaultBase * (namely 47// all faults returned using the Fault type) will use the 48// generic FaultBase name. 49 50class FaultBase : public RefCounted 51{ 52 public: 53 virtual FaultName name() 54 { 55 return "none"; 56 } 57 virtual FaultStat & stat() = 0; 58#if FULL_SYSTEM 59 virtual void ev5_trap(ExecContext * xc) = 0; 60#endif 61 template<typename T> 62 bool isA() {return dynamic_cast<T *>(this);} 63 virtual bool isMachineCheckFault() {return false;} 64 virtual bool isAlignmentFault() {return false;} 65}; 66 67FaultBase * const NoFault = 0; 68 69//The ISAs are each responsible for providing a genMachineCheckFault and a 70//genAlignmentFault functions, which return faults to use in the case of a 71//machine check fault or an alignment fault, respectively. Base classes which 72//provide the name() function, and the isMachineCheckFault and isAlignmentFault 73//functions are provided below. 74 75class MachineCheckFault : public FaultBase 76{ 77 private: 78 static FaultName _name; 79 public: 80 FaultName name() {return _name;} 81 bool isMachineCheckFault() {return true;} 82}; 83 84class AlignmentFault : public FaultBase 85{ 86 private: 87 static FaultName _name; 88 public: 89 FaultName name() {return _name;} 90 bool isAlignmentFault() {return true;} 91}; 92 93 94#endif // __FAULTS_HH__ 95