gem5/cpu/exec_context.cc
Gabe Black dd0d8e6287 Merge gblack@m5.eecs.umich.edu:/bk/multiarch
into  ewok.(none):/home/gblack/m5/multiarch

--HG--
extra : convert_revision : f6db244a66431dd6b8c5ba251ed02d76cd509cff
2006-03-02 21:44:43 -05:00

255 lines
6.6 KiB
C++

/*
* 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 <string>
#include "cpu/base.hh"
#include "cpu/exec_context.hh"
#if FULL_SYSTEM
#include "base/callback.hh"
#include "base/cprintf.hh"
#include "base/output.hh"
#include "base/trace.hh"
#include "cpu/profile.hh"
#include "kern/kernel_stats.hh"
#include "sim/serialize.hh"
#include "sim/sim_exit.hh"
#include "sim/system.hh"
#include "arch/stacktrace.hh"
#else
#include "sim/process.hh"
#endif
using namespace std;
// constructor
#if FULL_SYSTEM
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, System *_sys,
AlphaITB *_itb, AlphaDTB *_dtb,
FunctionalMemory *_mem)
: _status(ExecContext::Unallocated), cpu(_cpu), thread_num(_thread_num),
cpu_id(-1), lastActivate(0), lastSuspend(0), mem(_mem), itb(_itb),
dtb(_dtb), system(_sys), memctrl(_sys->memctrl), physmem(_sys->physmem),
kernelBinning(system->kernelBinning), bin(kernelBinning->bin),
fnbin(kernelBinning->fnbin), profile(NULL), quiesceEvent(this),
func_exe_inst(0), storeCondFailures(0)
{
kernelStats = new Kernel::Statistics(this);
memset(&regs, 0, sizeof(RegFile));
if (cpu->params->profile) {
profile = new FunctionProfile(system->kernelSymtab);
Callback *cb =
new MakeCallback<ExecContext, &ExecContext::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;
}
#else
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
Process *_process, int _asid)
: _status(ExecContext::Unallocated),
cpu(_cpu), thread_num(_thread_num), cpu_id(-1), lastActivate(0),
lastSuspend(0), process(_process), mem(process->getMemory()), asid(_asid),
func_exe_inst(0), storeCondFailures(0)
{
memset(&regs, 0, sizeof(RegFile));
}
ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num,
FunctionalMemory *_mem, int _asid)
: cpu(_cpu), thread_num(_thread_num), process(0), mem(_mem), asid(_asid),
func_exe_inst(0), storeCondFailures(0)
{
memset(&regs, 0, sizeof(RegFile));
}
#endif
ExecContext::~ExecContext()
{
#if FULL_SYSTEM
delete kernelStats;
#endif
}
#if FULL_SYSTEM
void
ExecContext::dumpFuncProfile()
{
std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
profile->dump(this, *os);
}
ExecContext::EndQuiesceEvent::EndQuiesceEvent(ExecContext *_xc)
: Event(&mainEventQueue), xc(_xc)
{
}
void
ExecContext::EndQuiesceEvent::process()
{
xc->activate();
}
const char*
ExecContext::EndQuiesceEvent::description()
{
return "End Quiesce Event.";
}
#endif
void
ExecContext::takeOverFrom(ExecContext *oldContext)
{
// some things should already be set up
assert(mem == oldContext->mem);
#if FULL_SYSTEM
assert(system == oldContext->system);
#else
assert(process == oldContext->process);
#endif
// copy over functional state
_status = oldContext->_status;
regs = oldContext->regs;
cpu_id = oldContext->cpu_id;
func_exe_inst = oldContext->func_exe_inst;
storeCondFailures = 0;
oldContext->_status = ExecContext::Unallocated;
}
void
ExecContext::serialize(ostream &os)
{
SERIALIZE_ENUM(_status);
regs.serialize(os);
// thread_num and cpu_id are deterministic from the config
SERIALIZE_SCALAR(func_exe_inst);
SERIALIZE_SCALAR(inst);
#if FULL_SYSTEM
Tick quiesceEndTick = 0;
if (quiesceEvent.scheduled())
quiesceEndTick = quiesceEvent.when();
SERIALIZE_SCALAR(quiesceEndTick);
kernelStats->serialize(os);
#endif
}
void
ExecContext::unserialize(Checkpoint *cp, const std::string &section)
{
UNSERIALIZE_ENUM(_status);
regs.unserialize(cp, section);
// thread_num and cpu_id are deterministic from the config
UNSERIALIZE_SCALAR(func_exe_inst);
UNSERIALIZE_SCALAR(inst);
#if FULL_SYSTEM
Tick quiesceEndTick;
UNSERIALIZE_SCALAR(quiesceEndTick);
if (quiesceEndTick)
quiesceEvent.schedule(quiesceEndTick);
kernelStats->unserialize(cp, section);
#endif
}
void
ExecContext::activate(int delay)
{
if (status() == Active)
return;
lastActivate = curTick;
_status = Active;
cpu->activateContext(thread_num, delay);
}
void
ExecContext::suspend()
{
if (status() == Suspended)
return;
lastActivate = curTick;
lastSuspend = curTick;
/*
#if FULL_SYSTEM
// Don't change the status from active if there are pending interrupts
if (cpu->check_interrupts()) {
assert(status() == Active);
return;
}
#endif
*/
_status = Suspended;
cpu->suspendContext(thread_num);
}
void
ExecContext::deallocate()
{
if (status() == Unallocated)
return;
_status = Unallocated;
cpu->deallocateContext(thread_num);
}
void
ExecContext::halt()
{
if (status() == Halted)
return;
_status = Halted;
cpu->haltContext(thread_num);
}
void
ExecContext::regStats(const string &name)
{
#if FULL_SYSTEM
kernelStats->regStats(name + ".kern");
#endif
}