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/*
* Copyright (c) 2010 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* Copyright (c) 2007-2008 The Florida State University
* 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: Ali Saidi
* Gabe Black
*/
#ifndef __ARM_FAULTS_HH__
#define __ARM_FAULTS_HH__
#include "arch/arm/miscregs.hh"
#include "arch/arm/types.hh"
#include "config/full_system.hh"
#include "sim/faults.hh"
#include "base/misc.hh"
// The design of the "name" and "vect" functions is in sim/faults.hh
namespace ArmISA
{
typedef const Addr FaultOffset;
class ArmFault : public FaultBase
{
protected:
Addr getVector(ThreadContext *tc);
public:
enum StatusEncoding
{
// Fault Status register encodings
// ARM ARM B3.9.4
AlignmentFault = 0x1,
DebugEvent = 0x2,
AccessFlag0 = 0x3,
InstructionCacheMaintenance = 0x4,
Translation0 = 0x5,
AccessFlag1 = 0x6,
Translation1 = 0x7,
SynchronousExternalAbort0 = 0x8,
Domain0 = 0x9,
SynchronousExternalAbort1 = 0x8,
Domain1 = 0xb,
TranslationTableWalkExtAbt0 = 0xc,
Permission0 = 0xd,
TranslationTableWalkExtAbt1 = 0xe,
Permission1 = 0xf,
AsynchronousExternalAbort = 0x16,
MemoryAccessAsynchronousParityError = 0x18,
MemoryAccessSynchronousParityError = 0x19,
TranslationTableWalkPrtyErr0 = 0x1c,
TranslationTableWalkPrtyErr1 = 0x1e,
// not a real fault. This is a status code
// to allow the translation function to inform
// the memory access function not to proceed
// for a Prefetch that misses in the TLB.
PrefetchTLBMiss
};
struct FaultVals
{
const FaultName name;
const FaultOffset offset;
const OperatingMode nextMode;
const uint8_t armPcOffset;
const uint8_t thumbPcOffset;
const bool abortDisable;
const bool fiqDisable;
FaultStat count;
};
#if FULL_SYSTEM
void invoke(ThreadContext *tc);
#endif
virtual FaultStat& countStat() = 0;
virtual FaultOffset offset() = 0;
virtual OperatingMode nextMode() = 0;
virtual uint8_t armPcOffset() = 0;
virtual uint8_t thumbPcOffset() = 0;
virtual bool abortDisable() = 0;
virtual bool fiqDisable() = 0;
};
template<typename T>
class ArmFaultVals : public ArmFault
{
protected:
static FaultVals vals;
public:
FaultName name() const { return vals.name; }
FaultStat & countStat() {return vals.count;}
FaultOffset offset() { return vals.offset; }
OperatingMode nextMode() { return vals.nextMode; }
uint8_t armPcOffset() { return vals.armPcOffset; }
uint8_t thumbPcOffset() { return vals.thumbPcOffset; }
bool abortDisable() { return vals.abortDisable; }
bool fiqDisable() { return vals.fiqDisable; }
};
class Reset : public ArmFaultVals<Reset>
#if FULL_SYSTEM
{
public:
void invoke(ThreadContext *tc);
};
#else
{};
#endif //FULL_SYSTEM
class UndefinedInstruction : public ArmFaultVals<UndefinedInstruction>
{
#if !FULL_SYSTEM
protected:
ExtMachInst machInst;
bool unknown;
const char *mnemonic;
bool disabled;
public:
UndefinedInstruction(ExtMachInst _machInst,
bool _unknown,
const char *_mnemonic = NULL,
bool _disabled = false) :
machInst(_machInst), unknown(_unknown),
mnemonic(_mnemonic), disabled(_disabled)
{
}
void invoke(ThreadContext *tc);
#endif
};
class SupervisorCall : public ArmFaultVals<SupervisorCall>
{
#if !FULL_SYSTEM
protected:
ExtMachInst machInst;
public:
SupervisorCall(ExtMachInst _machInst) : machInst(_machInst)
{}
void invoke(ThreadContext *tc);
#endif
};
template <class T>
class AbortFault : public ArmFaultVals<T>
{
protected:
Addr faultAddr;
bool write;
uint8_t domain;
uint8_t status;
public:
AbortFault(Addr _faultAddr, bool _write,
uint8_t _domain, uint8_t _status) :
faultAddr(_faultAddr), write(_write),
domain(_domain), status(_status)
{}
void invoke(ThreadContext *tc);
};
class PrefetchAbort : public AbortFault<PrefetchAbort>
{
public:
static const MiscRegIndex FsrIndex = MISCREG_IFSR;
static const MiscRegIndex FarIndex = MISCREG_IFAR;
PrefetchAbort(Addr _addr, uint8_t _status) :
AbortFault<PrefetchAbort>(_addr, false, 0, _status)
{}
};
class DataAbort : public AbortFault<DataAbort>
{
public:
static const MiscRegIndex FsrIndex = MISCREG_DFSR;
static const MiscRegIndex FarIndex = MISCREG_DFAR;
DataAbort(Addr _addr, uint8_t _domain, bool _write, uint8_t _status) :
AbortFault<DataAbort>(_addr, _write, _domain, _status)
{}
};
class Interrupt : public ArmFaultVals<Interrupt> {};
class FastInterrupt : public ArmFaultVals<FastInterrupt> {};
static inline Fault genMachineCheckFault()
{
return new Reset();
}
} // ArmISA namespace
#endif // __ARM_FAULTS_HH__
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