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/*
* 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.
*
* Authors: Steve Reinhardt
* Nathan Binkert
* Lisa Hsu
* Kevin Lim
*/
#include <string>
#include "arch/isa_traits.hh"
#include "arch/kernel_stats.hh"
#include "arch/stacktrace.hh"
#include "arch/utility.hh"
#include "base/callback.hh"
#include "base/cprintf.hh"
#include "base/output.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/base.hh"
#include "cpu/profile.hh"
#include "cpu/quiesce_event.hh"
#include "cpu/simple_thread.hh"
#include "cpu/thread_context.hh"
#include "mem/fs_translating_port_proxy.hh"
#include "mem/se_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, TheISA::TLB *_itb,
TheISA::TLB *_dtb, TheISA::ISA *_isa)
: ThreadState(_cpu, _thread_num, _process), isa(_isa), system(_sys),
itb(_itb), dtb(_dtb)
{
clearArchRegs();
tc = new ProxyThreadContext<SimpleThread>(this);
}
SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
TheISA::TLB *_itb, TheISA::TLB *_dtb,
TheISA::ISA *_isa, bool use_kernel_stats)
: ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
dtb(_dtb)
{
tc = new ProxyThreadContext<SimpleThread>(this);
quiesceEvent = new EndQuiesceEvent(tc);
clearArchRegs();
if (baseCpu->params()->profile) {
profile = new FunctionProfile(system->kernelSymtab);
Callback *cb =
new MakeCallback<SimpleThread,
&SimpleThread::dumpFuncProfile>(this);
registerExitCallback(cb);
}
// let's fill with a dummy node for now so we don't get a segfault
// on the first cycle when there's no node available.
static ProfileNode dummyNode;
profileNode = &dummyNode;
profilePC = 3;
if (use_kernel_stats)
kernelStats = new TheISA::Kernel::Statistics(system);
}
SimpleThread::~SimpleThread()
{
delete tc;
}
void
SimpleThread::takeOverFrom(ThreadContext *oldContext)
{
::takeOverFrom(*tc, *oldContext);
decoder.takeOverFrom(oldContext->getDecoderPtr());
kernelStats = oldContext->getKernelStats();
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(ostream &os)
{
ThreadState::serialize(os);
::serialize(*tc, os);
}
void
SimpleThread::unserialize(Checkpoint *cp, const std::string §ion)
{
ThreadState::unserialize(cp, section);
::unserialize(*tc, cp, section);
}
void
SimpleThread::startup()
{
isa->startup(tc);
}
void
SimpleThread::dumpFuncProfile()
{
std::ostream *os = simout.create(csprintf("profile.%s.dat",
baseCpu->name()));
profile->dump(tc, *os);
}
void
SimpleThread::activate(Cycles delay)
{
if (status() == ThreadContext::Active)
return;
lastActivate = curTick();
// if (status() == ThreadContext::Unallocated) {
// cpu->activateWhenReady(_threadId);
// return;
// }
_status = ThreadContext::Active;
// status() == Suspended
baseCpu->activateContext(_threadId, delay);
}
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::regStats(const string &name)
{
if (FullSystem && kernelStats)
kernelStats->regStats(name + ".kern");
}
void
SimpleThread::copyArchRegs(ThreadContext *src_tc)
{
TheISA::copyRegs(src_tc, tc);
}
// The following methods are defined in src/arch/alpha/ev5.cc for
// Alpha.
#if THE_ISA != ALPHA_ISA
Fault
SimpleThread::hwrei()
{
return NoFault;
}
bool
SimpleThread::simPalCheck(int palFunc)
{
return true;
}
#endif
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