91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __FAULTS_HH__
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#define __FAULTS_HH__
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#include "base/refcnt.hh"
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#include "sim/stats.hh"
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#include "config/full_system.hh"
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class ExecContext;
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class FaultBase;
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typedef RefCountingPtr<FaultBase> Fault;
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typedef const char * FaultName;
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typedef Stats::Scalar<> FaultStat;
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// Each class has it's name statically define in _name,
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// and has a virtual function to access it's name.
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// The function is necessary because otherwise, all objects
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// which are being accessed cast as a FaultBase * (namely
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// all faults returned using the Fault type) will use the
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// generic FaultBase name.
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class FaultBase : public RefCounted
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{
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public:
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virtual FaultName name() = 0;
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virtual FaultStat & stat() = 0;
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#if FULL_SYSTEM
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virtual void invoke(ExecContext * xc) = 0;
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#endif
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template<typename T>
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bool isA() {return dynamic_cast<T *>(this);}
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virtual bool isMachineCheckFault() {return false;}
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virtual bool isAlignmentFault() {return false;}
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};
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FaultBase * const NoFault = 0;
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//The ISAs are each responsible for providing a genMachineCheckFault and a
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//genAlignmentFault functions, which return faults to use in the case of a
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//machine check fault or an alignment fault, respectively. Base classes which
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//provide the name() function, and the isMachineCheckFault and isAlignmentFault
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//functions are provided below.
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class MachineCheckFault : public virtual FaultBase
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{
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private:
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static FaultName _name;
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public:
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FaultName name() {return _name;}
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bool isMachineCheckFault() {return true;}
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};
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class AlignmentFault : public virtual FaultBase
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{
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private:
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static FaultName _name;
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public:
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FaultName name() {return _name;}
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bool isAlignmentFault() {return true;}
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};
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#endif // __FAULTS_HH__
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