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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.
*
* Authors: Nathan Binkert
* Gabe Black
*/
#ifndef __FAULTS_HH__
#define __FAULTS_HH__
#include "base/types.hh"
#include "cpu/static_inst.hh"
#include "sim/stats.hh"
class ThreadContext;
typedef const char * FaultName;
typedef Stats::Scalar FaultStat;
class FaultBase
{
public:
virtual FaultName name() const = 0;
virtual void invoke(ThreadContext * tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
class UnimpFault : public FaultBase
{
private:
std::string panicStr;
public:
UnimpFault(std::string _str)
: panicStr(_str)
{ }
FaultName name() const { return "Unimplemented simulator feature"; }
void invoke(ThreadContext * tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
class ReExec : public FaultBase
{
public:
virtual FaultName name() const { return "Re-execution fault"; }
ReExec() {}
void invoke(ThreadContext *tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
/*
* This class is needed to allow system call retries to occur for blocking
* system calls in SE mode. A retry fault will be generated by the system call
* emulation code if blocking conditions arise; the fault is passed up the
* function call chain into the CPU model where it is handled by retrying the
* syscall instruction on a later tick.
*/
class SyscallRetryFault : public FaultBase
{
public:
virtual FaultName name() const { return "System call retry fault"; }
SyscallRetryFault() {}
void invoke(ThreadContext *tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
class GenericPageTableFault : public FaultBase
{
private:
Addr vaddr;
public:
FaultName name() const { return "Generic page table fault"; }
GenericPageTableFault(Addr va) : vaddr(va) {}
void invoke(ThreadContext * tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
class GenericAlignmentFault : public FaultBase
{
private:
Addr vaddr;
public:
FaultName name() const { return "Generic alignment fault"; }
GenericAlignmentFault(Addr va) : vaddr(va) {}
void invoke(ThreadContext * tc, const StaticInstPtr &inst =
StaticInst::nullStaticInstPtr);
};
#endif // __FAULTS_HH__
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