src/cpu/thread_context.cc - amd/gem5 - Git at Google

 /*
  * Copyright (c) 2012, 2016 ARM Limited
  * Copyright (c) 2013 Advanced Micro Devices, Inc.
  * 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) 2006 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: Kevin Lim
  */

 #include "cpu/thread_context.hh"

 #include "arch/kernel_stats.hh"
 #include "base/logging.hh"
 #include "base/trace.hh"
 #include "config/the_isa.hh"
 #include "cpu/base.hh"
 #include "cpu/quiesce_event.hh"
 #include "debug/Context.hh"
 #include "debug/Quiesce.hh"
 #include "params/BaseCPU.hh"
 #include "sim/full_system.hh"

 void
 ThreadContext::compare(ThreadContext *one, ThreadContext *two)
 {
     DPRINTF(Context, "Comparing thread contexts\n");

     // First loop through the integer registers.
     for (int i = 0; i < TheISA::NumIntRegs; ++i) {
         TheISA::IntReg t1 = one->readIntReg(i);
         TheISA::IntReg t2 = two->readIntReg(i);
         if (t1 != t2)
             panic("Int reg idx %d doesn't match, one: %#x, two: %#x",
                   i, t1, t2);
     }

     // Then loop through the floating point registers.
     for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
         TheISA::FloatRegBits t1 = one->readFloatRegBits(i);
         TheISA::FloatRegBits t2 = two->readFloatRegBits(i);
         if (t1 != t2)
             panic("Float reg idx %d doesn't match, one: %#x, two: %#x",
                   i, t1, t2);
     }

     // Then loop through the vector registers.
     for (int i = 0; i < TheISA::NumVecRegs; ++i) {
         RegId rid(VecRegClass, i);
         const TheISA::VecRegContainer& t1 = one->readVecReg(rid);
         const TheISA::VecRegContainer& t2 = two->readVecReg(rid);
         if (t1 != t2)
             panic("Vec reg idx %d doesn't match, one: %#x, two: %#x",
                   i, t1, t2);
     }
     for (int i = 0; i < TheISA::NumMiscRegs; ++i) {
         TheISA::MiscReg t1 = one->readMiscRegNoEffect(i);
         TheISA::MiscReg t2 = two->readMiscRegNoEffect(i);
         if (t1 != t2)
             panic("Misc reg idx %d doesn't match, one: %#x, two: %#x",
                   i, t1, t2);
     }

     // loop through the Condition Code registers.
     for (int i = 0; i < TheISA::NumCCRegs; ++i) {
         TheISA::CCReg t1 = one->readCCReg(i);
         TheISA::CCReg t2 = two->readCCReg(i);
         if (t1 != t2)
             panic("CC reg idx %d doesn't match, one: %#x, two: %#x",
                   i, t1, t2);
     }
     if (!(one->pcState() == two->pcState()))
         panic("PC state doesn't match.");
     int id1 = one->cpuId();
     int id2 = two->cpuId();
     if (id1 != id2)
         panic("CPU ids don't match, one: %d, two: %d", id1, id2);

     const ContextID cid1 = one->contextId();
     const ContextID cid2 = two->contextId();
     if (cid1 != cid2)
         panic("Context ids don't match, one: %d, two: %d", id1, id2);


 }

 void
 ThreadContext::quiesce()
 {
     if (!getCpuPtr()->params()->do_quiesce)
         return;

     DPRINTF(Quiesce, "%s: quiesce()\n", getCpuPtr()->name());

     suspend();
     if (getKernelStats())
        getKernelStats()->quiesce();
 }


 void
 ThreadContext::quiesceTick(Tick resume)
 {
     BaseCPU *cpu = getCpuPtr();

     if (!cpu->params()->do_quiesce)
         return;

     EndQuiesceEvent *quiesceEvent = getQuiesceEvent();

     cpu->reschedule(quiesceEvent, resume, true);

     DPRINTF(Quiesce, "%s: quiesceTick until %lu\n", cpu->name(), resume);

     suspend();
     if (getKernelStats())
         getKernelStats()->quiesce();
 }

 void
 serialize(ThreadContext &tc, CheckpointOut &cp)
 {
     using namespace TheISA;

     FloatRegBits floatRegs[NumFloatRegs];
     for (int i = 0; i < NumFloatRegs; ++i)
         floatRegs[i] = tc.readFloatRegBitsFlat(i);
     // This is a bit ugly, but needed to maintain backwards
     // compatibility.
     arrayParamOut(cp, "floatRegs.i", floatRegs, NumFloatRegs);

     std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs);
     for (int i = 0; i < NumVecRegs; ++i) {
         vecRegs[i] = tc.readVecRegFlat(i);
     }
     SERIALIZE_CONTAINER(vecRegs);

     IntReg intRegs[NumIntRegs];
     for (int i = 0; i < NumIntRegs; ++i)
         intRegs[i] = tc.readIntRegFlat(i);
     SERIALIZE_ARRAY(intRegs, NumIntRegs);

 #ifdef ISA_HAS_CC_REGS
     CCReg ccRegs[NumCCRegs];
     for (int i = 0; i < NumCCRegs; ++i)
         ccRegs[i] = tc.readCCRegFlat(i);
     SERIALIZE_ARRAY(ccRegs, NumCCRegs);
 #endif

     tc.pcState().serialize(cp);

     // thread_num and cpu_id are deterministic from the config
 }

 void
 unserialize(ThreadContext &tc, CheckpointIn &cp)
 {
     using namespace TheISA;

     FloatRegBits floatRegs[NumFloatRegs];
     // This is a bit ugly, but needed to maintain backwards
     // compatibility.
     arrayParamIn(cp, "floatRegs.i", floatRegs, NumFloatRegs);
     for (int i = 0; i < NumFloatRegs; ++i)
         tc.setFloatRegBitsFlat(i, floatRegs[i]);

     std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs);
     UNSERIALIZE_CONTAINER(vecRegs);
     for (int i = 0; i < NumVecRegs; ++i) {
         tc.setVecRegFlat(i, vecRegs[i]);
     }

     IntReg intRegs[NumIntRegs];
     UNSERIALIZE_ARRAY(intRegs, NumIntRegs);
     for (int i = 0; i < NumIntRegs; ++i)
         tc.setIntRegFlat(i, intRegs[i]);

 #ifdef ISA_HAS_CC_REGS
     CCReg ccRegs[NumCCRegs];
     UNSERIALIZE_ARRAY(ccRegs, NumCCRegs);
     for (int i = 0; i < NumCCRegs; ++i)
         tc.setCCRegFlat(i, ccRegs[i]);
 #endif

     PCState pcState;
     pcState.unserialize(cp);
     tc.pcState(pcState);

     // thread_num and cpu_id are deterministic from the config
 }

 void
 takeOverFrom(ThreadContext &ntc, ThreadContext &otc)
 {
     assert(ntc.getProcessPtr() == otc.getProcessPtr());

     ntc.setStatus(otc.status());
     ntc.copyArchRegs(&otc);
     ntc.setContextId(otc.contextId());
     ntc.setThreadId(otc.threadId());

     if (FullSystem) {
         assert(ntc.getSystemPtr() == otc.getSystemPtr());

         BaseCPU *ncpu(ntc.getCpuPtr());
         assert(ncpu);
         EndQuiesceEvent *oqe(otc.getQuiesceEvent());
         assert(oqe);
         assert(oqe->tc == &otc);

         BaseCPU *ocpu(otc.getCpuPtr());
         assert(ocpu);
         EndQuiesceEvent *nqe(ntc.getQuiesceEvent());
         assert(nqe);
         assert(nqe->tc == &ntc);

         if (oqe->scheduled()) {
             ncpu->schedule(nqe, oqe->when());
             ocpu->deschedule(oqe);
         }
     }

     otc.setStatus(ThreadContext::Halted);
 }
	/*
	* Copyright (c) 2012, 2016 ARM Limited
	* Copyright (c) 2013 Advanced Micro Devices, Inc.
	* 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) 2006 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: Kevin Lim
	*/

	#include "cpu/thread_context.hh"

	#include "arch/kernel_stats.hh"
	#include "base/logging.hh"
	#include "base/trace.hh"
	#include "config/the_isa.hh"
	#include "cpu/base.hh"
	#include "cpu/quiesce_event.hh"
	#include "debug/Context.hh"
	#include "debug/Quiesce.hh"
	#include "params/BaseCPU.hh"
	#include "sim/full_system.hh"

	void
	ThreadContext::compare(ThreadContext one, ThreadContext two)
	{
	DPRINTF(Context, "Comparing thread contexts\n");

	// First loop through the integer registers.
	for (int i = 0; i < TheISA::NumIntRegs; ++i) {
	TheISA::IntReg t1 = one->readIntReg(i);
	TheISA::IntReg t2 = two->readIntReg(i);
	if (t1 != t2)
	panic("Int reg idx %d doesn't match, one: %#x, two: %#x",
	i, t1, t2);
	}

	// Then loop through the floating point registers.
	for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
	TheISA::FloatRegBits t1 = one->readFloatRegBits(i);
	TheISA::FloatRegBits t2 = two->readFloatRegBits(i);
	if (t1 != t2)
	panic("Float reg idx %d doesn't match, one: %#x, two: %#x",
	i, t1, t2);
	}

	// Then loop through the vector registers.
	for (int i = 0; i < TheISA::NumVecRegs; ++i) {
	RegId rid(VecRegClass, i);
	const TheISA::VecRegContainer& t1 = one->readVecReg(rid);
	const TheISA::VecRegContainer& t2 = two->readVecReg(rid);
	if (t1 != t2)
	panic("Vec reg idx %d doesn't match, one: %#x, two: %#x",
	i, t1, t2);
	}
	for (int i = 0; i < TheISA::NumMiscRegs; ++i) {
	TheISA::MiscReg t1 = one->readMiscRegNoEffect(i);
	TheISA::MiscReg t2 = two->readMiscRegNoEffect(i);
	if (t1 != t2)
	panic("Misc reg idx %d doesn't match, one: %#x, two: %#x",
	i, t1, t2);
	}

	// loop through the Condition Code registers.
	for (int i = 0; i < TheISA::NumCCRegs; ++i) {
	TheISA::CCReg t1 = one->readCCReg(i);
	TheISA::CCReg t2 = two->readCCReg(i);
	if (t1 != t2)
	panic("CC reg idx %d doesn't match, one: %#x, two: %#x",
	i, t1, t2);
	}
	if (!(one->pcState() == two->pcState()))
	panic("PC state doesn't match.");
	int id1 = one->cpuId();
	int id2 = two->cpuId();
	if (id1 != id2)
	panic("CPU ids don't match, one: %d, two: %d", id1, id2);

	const ContextID cid1 = one->contextId();
	const ContextID cid2 = two->contextId();
	if (cid1 != cid2)
	panic("Context ids don't match, one: %d, two: %d", id1, id2);


	}

	void
	ThreadContext::quiesce()
	{
	if (!getCpuPtr()->params()->do_quiesce)
	return;

	DPRINTF(Quiesce, "%s: quiesce()\n", getCpuPtr()->name());

	suspend();
	if (getKernelStats())
	getKernelStats()->quiesce();
	}


	void
	ThreadContext::quiesceTick(Tick resume)
	{
	BaseCPU *cpu = getCpuPtr();

	if (!cpu->params()->do_quiesce)
	return;

	EndQuiesceEvent *quiesceEvent = getQuiesceEvent();

	cpu->reschedule(quiesceEvent, resume, true);

	DPRINTF(Quiesce, "%s: quiesceTick until %lu\n", cpu->name(), resume);

	suspend();
	if (getKernelStats())
	getKernelStats()->quiesce();
	}

	void
	serialize(ThreadContext &tc, CheckpointOut &cp)
	{
	using namespace TheISA;

	FloatRegBits floatRegs[NumFloatRegs];
	for (int i = 0; i < NumFloatRegs; ++i)
	floatRegs[i] = tc.readFloatRegBitsFlat(i);
	// This is a bit ugly, but needed to maintain backwards
	// compatibility.
	arrayParamOut(cp, "floatRegs.i", floatRegs, NumFloatRegs);

	std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs);
	for (int i = 0; i < NumVecRegs; ++i) {
	vecRegs[i] = tc.readVecRegFlat(i);
	}
	SERIALIZE_CONTAINER(vecRegs);

	IntReg intRegs[NumIntRegs];
	for (int i = 0; i < NumIntRegs; ++i)
	intRegs[i] = tc.readIntRegFlat(i);
	SERIALIZE_ARRAY(intRegs, NumIntRegs);

	#ifdef ISA_HAS_CC_REGS
	CCReg ccRegs[NumCCRegs];
	for (int i = 0; i < NumCCRegs; ++i)
	ccRegs[i] = tc.readCCRegFlat(i);
	SERIALIZE_ARRAY(ccRegs, NumCCRegs);
	#endif

	tc.pcState().serialize(cp);

	// thread_num and cpu_id are deterministic from the config
	}

	void
	unserialize(ThreadContext &tc, CheckpointIn &cp)
	{
	using namespace TheISA;

	FloatRegBits floatRegs[NumFloatRegs];
	// This is a bit ugly, but needed to maintain backwards
	// compatibility.
	arrayParamIn(cp, "floatRegs.i", floatRegs, NumFloatRegs);
	for (int i = 0; i < NumFloatRegs; ++i)
	tc.setFloatRegBitsFlat(i, floatRegs[i]);

	std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs);
	UNSERIALIZE_CONTAINER(vecRegs);
	for (int i = 0; i < NumVecRegs; ++i) {
	tc.setVecRegFlat(i, vecRegs[i]);
	}

	IntReg intRegs[NumIntRegs];
	UNSERIALIZE_ARRAY(intRegs, NumIntRegs);
	for (int i = 0; i < NumIntRegs; ++i)
	tc.setIntRegFlat(i, intRegs[i]);

	#ifdef ISA_HAS_CC_REGS
	CCReg ccRegs[NumCCRegs];
	UNSERIALIZE_ARRAY(ccRegs, NumCCRegs);
	for (int i = 0; i < NumCCRegs; ++i)
	tc.setCCRegFlat(i, ccRegs[i]);
	#endif

	PCState pcState;
	pcState.unserialize(cp);
	tc.pcState(pcState);

	// thread_num and cpu_id are deterministic from the config
	}

	void
	takeOverFrom(ThreadContext &ntc, ThreadContext &otc)
	{
	assert(ntc.getProcessPtr() == otc.getProcessPtr());

	ntc.setStatus(otc.status());
	ntc.copyArchRegs(&otc);
	ntc.setContextId(otc.contextId());
	ntc.setThreadId(otc.threadId());

	if (FullSystem) {
	assert(ntc.getSystemPtr() == otc.getSystemPtr());

	BaseCPU *ncpu(ntc.getCpuPtr());
	assert(ncpu);
	EndQuiesceEvent *oqe(otc.getQuiesceEvent());
	assert(oqe);
	assert(oqe->tc == &otc);

	BaseCPU *ocpu(otc.getCpuPtr());
	assert(ocpu);
	EndQuiesceEvent *nqe(ntc.getQuiesceEvent());
	assert(nqe);
	assert(nqe->tc == &ntc);

	if (oqe->scheduled()) {
	ncpu->schedule(nqe, oqe->when());
	ocpu->deschedule(oqe);
	}
	}

	otc.setStatus(ThreadContext::Halted);
	}