src/arch/arm/insts/tme64ruby.cc - public/gem5 - Git at Google

 /*
  * Copyright (c) 2020 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.
  *
  * 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.
  */

 #include "arch/arm/faults.hh"
 #include "arch/arm/htm.hh"
 #include "arch/arm/insts/tme64.hh"
 #include "arch/generic/memhelpers.hh"
 #include "debug/ArmTme.hh"
 #include "mem/packet_access.hh"
 #include "mem/request.hh"

 namespace gem5
 {

 using namespace ArmISA;

 namespace ArmISAInst {

 Fault
 Tstart64::initiateAcc(ExecContext *xc,
                       Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     const uint64_t htm_depth = xc->getHtmTransactionalDepth();

     DPRINTF(ArmTme, "tme depth is %d\n", htm_depth);

     // Maximum TME nesting depth exceeded
     if (htm_depth > ArmISA::HTMCheckpoint::MAX_HTM_DEPTH) {
         const uint64_t htm_uid = xc->getHtmTransactionUid();
         fault = std::make_shared<GenericHtmFailureFault>(
             htm_uid, HtmFailureFaultCause::NEST);
     }

     if (fault == NoFault) {
         Request::Flags memAccessFlags =
             Request::STRICT_ORDER|Request::PHYSICAL|Request::HTM_START;

         // Nested transaction start/stops never leave the core.
         // These Requests are marked as NO_ACCESS to indicate that the request
         // should not be sent to the cache controller.
         if (htm_depth > 1) {
             memAccessFlags = memAccessFlags | Request::NO_ACCESS;
         }

         fault = xc->initiateHtmCmd(memAccessFlags);
     }

     return fault;
 }

 Fault
 Tstart64::completeAcc(PacketPtr pkt, ExecContext *xc,
                       Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     uint64_t Mem;
     uint64_t Dest64 = 0;
     ThreadContext *tc = xc->tcBase();
     const uint64_t htm_depth = xc->getHtmTransactionalDepth();

     getMemLE(pkt, Mem, traceData);

     // sanity check
     if (Mem != 0) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     // sanity check
     if (!xc->inHtmTransactionalState()) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     if (fault == NoFault) {
         Dest64 = 0x0; // tstart returns 0 on success

         // checkpointing occurs in the outer transaction only
         if (htm_depth == 1) {
             BaseHTMCheckpointPtr& cpt = xc->tcBase()->getHtmCheckpointPtr();

             HTMCheckpoint *armcpt =
                 dynamic_cast<HTMCheckpoint*>(cpt.get());
             assert(armcpt != nullptr);

             armcpt->save(tc);
             armcpt->destinationRegister(dest);

             tc->getIsaPtr()->globalClearExclusive();
         }

         xc->setIntRegOperand(this, 0, (Dest64) & mask(intWidth));


         uint64_t final_val = Dest64;
         if (traceData) { traceData->setData(final_val); }
     }

     return fault;
 }

 Fault
 Ttest64::execute(ExecContext *xc, Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     uint64_t Dest64 = 0;
     const uint64_t htm_depth = xc->getHtmTransactionalDepth();

     // sanity check
     if (htm_depth > ArmISA::HTMCheckpoint::MAX_HTM_DEPTH) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     Dest64 = htm_depth;


     // sanity check
     if (Dest64 == 0)
         assert(!xc->inHtmTransactionalState());
     else
         assert(xc->inHtmTransactionalState());

     if (fault == NoFault) {
         uint64_t final_val = Dest64;
         xc->setIntRegOperand(this, 0, (Dest64) & mask(intWidth));
         if (traceData) { traceData->setData(final_val); }
     }

     return fault;
 }

 Fault
 Tcancel64::initiateAcc(ExecContext *xc, Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;

     // sanity check
     if (!xc->inHtmTransactionalState()) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     Request::Flags memAccessFlags =
         Request::STRICT_ORDER|Request::PHYSICAL|Request::HTM_CANCEL;

     fault = xc->initiateHtmCmd(memAccessFlags);

     return fault;
 }

 Fault
 Tcancel64::completeAcc(PacketPtr pkt, ExecContext *xc,
                        Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     uint64_t Mem;

     getMemLE(pkt, Mem, traceData);

     // sanity check
     if (Mem != 0) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     if (fault == NoFault) {
         auto tme_checkpoint = static_cast<HTMCheckpoint*>(
             xc->tcBase()->getHtmCheckpointPtr().get());
         tme_checkpoint->cancelReason(imm);

         fault = std::make_shared<GenericHtmFailureFault>(
             xc->getHtmTransactionUid(),
             HtmFailureFaultCause::EXPLICIT);
     }

     return fault;
 }

 Fault
 MicroTcommit64::initiateAcc(ExecContext *xc,
                             Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     const uint64_t htm_depth = xc->getHtmTransactionalDepth();

     // sanity check
     if (!xc->inHtmTransactionalState()) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     DPRINTF(ArmTme, "tme depth is %d\n", htm_depth);

     Request::Flags memAccessFlags =
         Request::STRICT_ORDER|Request::PHYSICAL|Request::HTM_COMMIT;

     // Nested transaction start/stops never leave the core.
     // These Requests are marked as NO_ACCESS to indicate that the request
     // should not be sent to the cache controller.
     if (htm_depth > 1) {
         memAccessFlags = memAccessFlags | Request::NO_ACCESS;
     }

     fault = xc->initiateHtmCmd(memAccessFlags);

     return fault;
 }

 Fault
 MicroTcommit64::completeAcc(PacketPtr pkt, ExecContext *xc,
                             Trace::InstRecord *traceData) const
 {
     Fault fault = NoFault;
     uint64_t Mem;
     ThreadContext *tc = xc->tcBase();
     const uint64_t htm_depth = xc->getHtmTransactionalDepth();

     getMemLE(pkt, Mem, traceData);

     // sanity check
     if (Mem != 0) {
         fault = std::make_shared<IllegalInstSetStateFault>();
     }

     if (fault == NoFault) {
         if (htm_depth == 1) {
             auto tme_checkpoint = static_cast<HTMCheckpoint*>(
                 xc->tcBase()->getHtmCheckpointPtr().get());

             assert(tme_checkpoint);
             assert(tme_checkpoint->valid());

             tme_checkpoint->reset();
             tc->getIsaPtr()->globalClearExclusive();
         }
     }

     return fault;
 }

 } // namespace ArmISAInst
 } // namespace gem5
	/*
	* Copyright (c) 2020 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.
	*
	* 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.
	*/

	#include "arch/arm/faults.hh"
	#include "arch/arm/htm.hh"
	#include "arch/arm/insts/tme64.hh"
	#include "arch/generic/memhelpers.hh"
	#include "debug/ArmTme.hh"
	#include "mem/packet_access.hh"
	#include "mem/request.hh"

	namespace gem5
	{

	using namespace ArmISA;

	namespace ArmISAInst {

	Fault
	Tstart64::initiateAcc(ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	const uint64_t htm_depth = xc->getHtmTransactionalDepth();

	DPRINTF(ArmTme, "tme depth is %d\n", htm_depth);

	// Maximum TME nesting depth exceeded
	if (htm_depth > ArmISA::HTMCheckpoint::MAX_HTM_DEPTH) {
	const uint64_t htm_uid = xc->getHtmTransactionUid();
	fault = std::make_shared<GenericHtmFailureFault>(
	htm_uid, HtmFailureFaultCause::NEST);
	}

	if (fault == NoFault) {
	Request::Flags memAccessFlags =
	Request::STRICT_ORDER\|Request::PHYSICAL\|Request::HTM_START;

	// Nested transaction start/stops never leave the core.
	// These Requests are marked as NO_ACCESS to indicate that the request
	// should not be sent to the cache controller.
	if (htm_depth > 1) {
	memAccessFlags = memAccessFlags \| Request::NO_ACCESS;
	}

	fault = xc->initiateHtmCmd(memAccessFlags);
	}

	return fault;
	}

	Fault
	Tstart64::completeAcc(PacketPtr pkt, ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	uint64_t Mem;
	uint64_t Dest64 = 0;
	ThreadContext *tc = xc->tcBase();
	const uint64_t htm_depth = xc->getHtmTransactionalDepth();

	getMemLE(pkt, Mem, traceData);

	// sanity check
	if (Mem != 0) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	// sanity check
	if (!xc->inHtmTransactionalState()) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	if (fault == NoFault) {
	Dest64 = 0x0; // tstart returns 0 on success

	// checkpointing occurs in the outer transaction only
	if (htm_depth == 1) {
	BaseHTMCheckpointPtr& cpt = xc->tcBase()->getHtmCheckpointPtr();

	HTMCheckpoint *armcpt =
	dynamic_cast<HTMCheckpoint*>(cpt.get());
	assert(armcpt != nullptr);

	armcpt->save(tc);
	armcpt->destinationRegister(dest);

	tc->getIsaPtr()->globalClearExclusive();
	}

	xc->setIntRegOperand(this, 0, (Dest64) & mask(intWidth));


	uint64_t final_val = Dest64;
	if (traceData) { traceData->setData(final_val); }
	}

	return fault;
	}

	Fault
	Ttest64::execute(ExecContext xc, Trace::InstRecord traceData) const
	{
	Fault fault = NoFault;
	uint64_t Dest64 = 0;
	const uint64_t htm_depth = xc->getHtmTransactionalDepth();

	// sanity check
	if (htm_depth > ArmISA::HTMCheckpoint::MAX_HTM_DEPTH) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	Dest64 = htm_depth;


	// sanity check
	if (Dest64 == 0)
	assert(!xc->inHtmTransactionalState());
	else
	assert(xc->inHtmTransactionalState());

	if (fault == NoFault) {
	uint64_t final_val = Dest64;
	xc->setIntRegOperand(this, 0, (Dest64) & mask(intWidth));
	if (traceData) { traceData->setData(final_val); }
	}

	return fault;
	}

	Fault
	Tcancel64::initiateAcc(ExecContext xc, Trace::InstRecord traceData) const
	{
	Fault fault = NoFault;

	// sanity check
	if (!xc->inHtmTransactionalState()) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	Request::Flags memAccessFlags =
	Request::STRICT_ORDER\|Request::PHYSICAL\|Request::HTM_CANCEL;

	fault = xc->initiateHtmCmd(memAccessFlags);

	return fault;
	}

	Fault
	Tcancel64::completeAcc(PacketPtr pkt, ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	uint64_t Mem;

	getMemLE(pkt, Mem, traceData);

	// sanity check
	if (Mem != 0) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	if (fault == NoFault) {
	auto tme_checkpoint = static_cast<HTMCheckpoint*>(
	xc->tcBase()->getHtmCheckpointPtr().get());
	tme_checkpoint->cancelReason(imm);

	fault = std::make_shared<GenericHtmFailureFault>(
	xc->getHtmTransactionUid(),
	HtmFailureFaultCause::EXPLICIT);
	}

	return fault;
	}

	Fault
	MicroTcommit64::initiateAcc(ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	const uint64_t htm_depth = xc->getHtmTransactionalDepth();

	// sanity check
	if (!xc->inHtmTransactionalState()) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	DPRINTF(ArmTme, "tme depth is %d\n", htm_depth);

	Request::Flags memAccessFlags =
	Request::STRICT_ORDER\|Request::PHYSICAL\|Request::HTM_COMMIT;

	// Nested transaction start/stops never leave the core.
	// These Requests are marked as NO_ACCESS to indicate that the request
	// should not be sent to the cache controller.
	if (htm_depth > 1) {
	memAccessFlags = memAccessFlags \| Request::NO_ACCESS;
	}

	fault = xc->initiateHtmCmd(memAccessFlags);

	return fault;
	}

	Fault
	MicroTcommit64::completeAcc(PacketPtr pkt, ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	uint64_t Mem;
	ThreadContext *tc = xc->tcBase();
	const uint64_t htm_depth = xc->getHtmTransactionalDepth();

	getMemLE(pkt, Mem, traceData);

	// sanity check
	if (Mem != 0) {
	fault = std::make_shared<IllegalInstSetStateFault>();
	}

	if (fault == NoFault) {
	if (htm_depth == 1) {
	auto tme_checkpoint = static_cast<HTMCheckpoint*>(
	xc->tcBase()->getHtmCheckpointPtr().get());

	assert(tme_checkpoint);
	assert(tme_checkpoint->valid());

	tme_checkpoint->reset();
	tc->getIsaPtr()->globalClearExclusive();
	}
	}

	return fault;
	}

	} // namespace ArmISAInst
	} // namespace gem5