faults.hh revision 11877
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 * Authors: Nathan Binkert 29 * Gabe Black 30 */ 31 32#ifndef __FAULTS_HH__ 33#define __FAULTS_HH__ 34 35#include "base/types.hh" 36#include "cpu/static_inst.hh" 37#include "sim/stats.hh" 38 39class ThreadContext; 40 41typedef const char * FaultName; 42typedef Stats::Scalar FaultStat; 43 44class FaultBase 45{ 46 public: 47 virtual FaultName name() const = 0; 48 virtual void invoke(ThreadContext * tc, const StaticInstPtr &inst = 49 StaticInst::nullStaticInstPtr); 50}; 51 52class UnimpFault : public FaultBase 53{ 54 private: 55 std::string panicStr; 56 public: 57 UnimpFault(std::string _str) 58 : panicStr(_str) 59 { } 60 61 FaultName name() const { return "Unimplemented simulator feature"; } 62 void invoke(ThreadContext * tc, const StaticInstPtr &inst = 63 StaticInst::nullStaticInstPtr); 64}; 65 66class ReExec : public FaultBase 67{ 68 public: 69 virtual FaultName name() const { return "Re-execution fault"; } 70 ReExec() {} 71 void invoke(ThreadContext *tc, const StaticInstPtr &inst = 72 StaticInst::nullStaticInstPtr); 73}; 74 75/* 76 * This class is needed to allow system call retries to occur for blocking 77 * system calls in SE mode. A retry fault will be generated by the system call 78 * emulation code if blocking conditions arise; the fault is passed up the 79 * function call chain into the CPU model where it is handled by retrying the 80 * syscall instruction on a later tick. 81 */ 82class SyscallRetryFault : public FaultBase 83{ 84 public: 85 virtual FaultName name() const { return "System call retry fault"; } 86 SyscallRetryFault() {} 87 void invoke(ThreadContext *tc, const StaticInstPtr &inst = 88 StaticInst::nullStaticInstPtr); 89}; 90 91class GenericPageTableFault : public FaultBase 92{ 93 private: 94 Addr vaddr; 95 public: 96 FaultName name() const { return "Generic page table fault"; } 97 GenericPageTableFault(Addr va) : vaddr(va) {} 98 void invoke(ThreadContext * tc, const StaticInstPtr &inst = 99 StaticInst::nullStaticInstPtr); 100}; 101 102class GenericAlignmentFault : public FaultBase 103{ 104 private: 105 Addr vaddr; 106 public: 107 FaultName name() const { return "Generic alignment fault"; } 108 GenericAlignmentFault(Addr va) : vaddr(va) {} 109 void invoke(ThreadContext * tc, const StaticInstPtr &inst = 110 StaticInst::nullStaticInstPtr); 111}; 112 113#endif // __FAULTS_HH__ 114