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/*
* Copyright (c) 2010-2012, 2016-2017, 2019 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) 2004-2006 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/o3/thread_context.hh"
#include "arch/vecregs.hh"
#include "config/the_isa.hh"
#include "debug/O3CPU.hh"
namespace gem5
{
namespace o3
{
void
ThreadContext::takeOverFrom(gem5::ThreadContext *old_context)
{
gem5::takeOverFrom(*this, *old_context);
getIsaPtr()->takeOverFrom(this, old_context);
InstDecoder *newDecoder = getDecoderPtr();
InstDecoder *oldDecoder = old_context->getDecoderPtr();
newDecoder->takeOverFrom(oldDecoder);
thread->noSquashFromTC = false;
thread->trapPending = false;
}
void
ThreadContext::activate()
{
DPRINTF(O3CPU, "Calling activate on Thread Context %d\n",
threadId());
if (thread->status() == gem5::ThreadContext::Active)
return;
thread->lastActivate = curTick();
thread->setStatus(gem5::ThreadContext::Active);
// status() == Suspended
cpu->activateContext(thread->threadId());
}
void
ThreadContext::suspend()
{
DPRINTF(O3CPU, "Calling suspend on Thread Context %d\n",
threadId());
if (thread->status() == gem5::ThreadContext::Suspended)
return;
if (cpu->isDraining()) {
DPRINTF(O3CPU, "Ignoring suspend on TC due to pending drain\n");
return;
}
thread->lastActivate = curTick();
thread->lastSuspend = curTick();
thread->setStatus(gem5::ThreadContext::Suspended);
cpu->suspendContext(thread->threadId());
}
void
ThreadContext::halt()
{
DPRINTF(O3CPU, "Calling halt on Thread Context %d\n", threadId());
if (thread->status() == gem5::ThreadContext::Halting ||
thread->status() == gem5::ThreadContext::Halted)
return;
// the thread is not going to halt/terminate immediately in this cycle.
// The thread will be removed after an exit trap is processed
// (e.g., after trapLatency cycles). Until then, the thread's status
// will be Halting.
thread->setStatus(gem5::ThreadContext::Halting);
// add this thread to the exiting list to mark that it is trying to exit.
cpu->addThreadToExitingList(thread->threadId());
}
Tick
ThreadContext::readLastActivate()
{
return thread->lastActivate;
}
Tick
ThreadContext::readLastSuspend()
{
return thread->lastSuspend;
}
void
ThreadContext::copyArchRegs(gem5::ThreadContext *tc)
{
// Prevent squashing
thread->noSquashFromTC = true;
getIsaPtr()->copyRegsFrom(tc);
thread->noSquashFromTC = false;
}
void
ThreadContext::clearArchRegs()
{
cpu->isa[thread->threadId()]->clear();
}
RegVal
ThreadContext::getRegFlat(const RegId &reg) const
{
return cpu->getArchReg(reg, thread->threadId());
}
void *
ThreadContext::getWritableRegFlat(const RegId &reg)
{
return cpu->getWritableArchReg(reg, thread->threadId());
}
void
ThreadContext::getRegFlat(const RegId &reg, void *val) const
{
cpu->getArchReg(reg, val, thread->threadId());
}
void
ThreadContext::setRegFlat(const RegId &reg, RegVal val)
{
cpu->setArchReg(reg, val, thread->threadId());
conditionalSquash();
}
void
ThreadContext::setRegFlat(const RegId &reg, const void *val)
{
cpu->setArchReg(reg, val, thread->threadId());
conditionalSquash();
}
void
ThreadContext::pcState(const PCStateBase &val)
{
cpu->pcState(val, thread->threadId());
conditionalSquash();
}
void
ThreadContext::pcStateNoRecord(const PCStateBase &val)
{
cpu->pcState(val, thread->threadId());
conditionalSquash();
}
RegId
ThreadContext::flattenRegId(const RegId& regId) const
{
return cpu->isa[thread->threadId()]->flattenRegId(regId);
}
void
ThreadContext::setMiscRegNoEffect(RegIndex misc_reg, RegVal val)
{
cpu->setMiscRegNoEffect(misc_reg, val, thread->threadId());
conditionalSquash();
}
void
ThreadContext::setMiscReg(RegIndex misc_reg, RegVal val)
{
cpu->setMiscReg(misc_reg, val, thread->threadId());
conditionalSquash();
}
// hardware transactional memory
void
ThreadContext::htmAbortTransaction(uint64_t htmUid,
HtmFailureFaultCause cause)
{
cpu->htmSendAbortSignal(thread->threadId(), htmUid, cause);
conditionalSquash();
}
BaseHTMCheckpointPtr&
ThreadContext::getHtmCheckpointPtr()
{
return thread->htmCheckpoint;
}
void
ThreadContext::setHtmCheckpointPtr(BaseHTMCheckpointPtr new_cpt)
{
thread->htmCheckpoint = std::move(new_cpt);
}
} // namespace o3
} // namespace gem5