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/*
* Copyright (c) 2018, 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.
*
* Copyright (c) 2001-2006 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.
*/
#include "cpu/simple_thread.hh"
#include <string>
#include "arch/utility.hh"
#include "base/callback.hh"
#include "base/compiler.hh"
#include "base/cprintf.hh"
#include "base/output.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/base.hh"
#include "cpu/simple/base.hh"
#include "cpu/thread_context.hh"
#include "mem/se_translating_port_proxy.hh"
#include "mem/translating_port_proxy.hh"
#include "params/BaseCPU.hh"
#include "sim/faults.hh"
#include "sim/full_system.hh"
#include "sim/process.hh"
#include "sim/serialize.hh"
#include "sim/sim_exit.hh"
#include "sim/system.hh"
using namespace std;
// constructor
SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
Process *_process, BaseTLB *_itb,
BaseTLB *_dtb, BaseISA *_isa)
: ThreadState(_cpu, _thread_num, _process),
isa(dynamic_cast<TheISA::ISA *>(_isa)),
predicate(true), memAccPredicate(true),
comInstEventQueue("instruction-based event queue"),
system(_sys), itb(_itb), dtb(_dtb), decoder(isa),
htmTransactionStarts(0), htmTransactionStops(0)
{
assert(isa);
clearArchRegs();
}
SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
BaseTLB *_itb, BaseTLB *_dtb, BaseISA *_isa)
: ThreadState(_cpu, _thread_num, NULL),
isa(dynamic_cast<TheISA::ISA *>(_isa)),
predicate(true), memAccPredicate(true),
comInstEventQueue("instruction-based event queue"),
system(_sys), itb(_itb), dtb(_dtb), decoder(isa),
htmTransactionStarts(0), htmTransactionStops(0)
{
assert(isa);
clearArchRegs();
}
void
SimpleThread::takeOverFrom(ThreadContext *oldContext)
{
::takeOverFrom(*this, *oldContext);
decoder.takeOverFrom(oldContext->getDecoderPtr());
isa->takeOverFrom(this, oldContext);
funcExeInst = oldContext->readFuncExeInst();
storeCondFailures = 0;
}
void
SimpleThread::copyState(ThreadContext *oldContext)
{
// copy over functional state
_status = oldContext->status();
copyArchRegs(oldContext);
if (FullSystem)
funcExeInst = oldContext->readFuncExeInst();
_threadId = oldContext->threadId();
_contextId = oldContext->contextId();
}
void
SimpleThread::serialize(CheckpointOut &cp) const
{
ThreadState::serialize(cp);
::serialize(*this, cp);
}
void
SimpleThread::unserialize(CheckpointIn &cp)
{
ThreadState::unserialize(cp);
::unserialize(*this, cp);
}
void
SimpleThread::activate()
{
if (status() == ThreadContext::Active)
return;
lastActivate = curTick();
_status = ThreadContext::Active;
baseCpu->activateContext(_threadId);
}
void
SimpleThread::suspend()
{
if (status() == ThreadContext::Suspended)
return;
lastActivate = curTick();
lastSuspend = curTick();
_status = ThreadContext::Suspended;
baseCpu->suspendContext(_threadId);
}
void
SimpleThread::halt()
{
if (status() == ThreadContext::Halted)
return;
_status = ThreadContext::Halted;
baseCpu->haltContext(_threadId);
}
void
SimpleThread::copyArchRegs(ThreadContext *src_tc)
{
TheISA::copyRegs(src_tc, this);
}
// hardware transactional memory
void
SimpleThread::htmAbortTransaction(uint64_t htm_uid, HtmFailureFaultCause cause)
{
BaseSimpleCPU *baseSimpleCpu = dynamic_cast<BaseSimpleCPU*>(baseCpu);
assert(baseSimpleCpu);
baseSimpleCpu->htmSendAbortSignal(cause);
// these must be reset after the abort signal has been sent
htmTransactionStarts = 0;
htmTransactionStops = 0;
}
BaseHTMCheckpointPtr&
SimpleThread::getHtmCheckpointPtr()
{
return _htmCheckpoint;
}
void
SimpleThread::setHtmCheckpointPtr(BaseHTMCheckpointPtr new_cpt)
{
_htmCheckpoint = std::move(new_cpt);
}