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