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Diffstat (limited to 'cpu/cpu_exec_context.cc')
| -rw-r--r-- | cpu/cpu_exec_context.cc | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/cpu/cpu_exec_context.cc b/cpu/cpu_exec_context.cc new file mode 100644 index 000000000..6ef42762d --- /dev/null +++ b/cpu/cpu_exec_context.cc @@ -0,0 +1,290 @@ +/* + * 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/cpu_exec_context.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" +#include "mem/translating_port.hh" +#endif + +using namespace std; + +// constructor +#if FULL_SYSTEM +CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num, System *_sys, + AlphaITB *_itb, AlphaDTB *_dtb, + Memory *_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), + profile(NULL), quiesceEvent(this), func_exe_inst(0), storeCondFailures(0) +{ + proxy = new ProxyExecContext<CPUExecContext>(this); + + memset(®s, 0, sizeof(RegFile)); + + if (cpu->params->profile) { + profile = new FunctionProfile(system->kernelSymtab); + Callback *cb = + new MakeCallback<CPUExecContext, + &CPUExecContext::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 +CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num, + Process *_process, int _asid, Port *mem_port) + : _status(ExecContext::Unallocated), + cpu(_cpu), thread_num(_thread_num), cpu_id(-1), lastActivate(0), + lastSuspend(0), process(_process), asid(_asid), + func_exe_inst(0), storeCondFailures(0) +{ + port = new TranslatingPort(mem_port, process->pTable); + memset(®s, 0, sizeof(RegFile)); + proxy = new ProxyExecContext<CPUExecContext>(this); +} + +CPUExecContext::CPUExecContext(RegFile *regFile) + : cpu(NULL), thread_num(-1), process(NULL), mem(NULL), asid(-1), + func_exe_inst(0), storeCondFailures(0) +{ + regs = *regFile; + proxy = new ProxyExecContext<CPUExecContext>(this); +} + +#endif + +CPUExecContext::~CPUExecContext() +{ + delete proxy; +} + +#if FULL_SYSTEM +void +CPUExecContext::dumpFuncProfile() +{ + std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); + profile->dump(proxy, *os); +} + +CPUExecContext::EndQuiesceEvent::EndQuiesceEvent(CPUExecContext *_cpuXC) + : Event(&mainEventQueue), cpuXC(_cpuXC) +{ +} + +void +CPUExecContext::EndQuiesceEvent::process() +{ + cpuXC->activate(); +} + +const char* +CPUExecContext::EndQuiesceEvent::description() +{ + return "End Quiesce Event."; +} + +void +CPUExecContext::profileClear() +{ + if (profile) + profile->clear(); +} + +void +CPUExecContext::profileSample() +{ + if (profile) + profile->sample(profileNode, profilePC); +} + +#endif + +void +CPUExecContext::takeOverFrom(ExecContext *oldContext) +{ + // some things should already be set up +#if FULL_SYSTEM + assert(system == oldContext->getSystemPtr()); +#else + assert(process == oldContext->getProcessPtr()); +#endif + + // copy over functional state + _status = oldContext->status(); + copyArchRegs(oldContext); + cpu_id = oldContext->readCpuId(); +#if !FULL_SYSTEM + func_exe_inst = oldContext->readFuncExeInst(); +#endif + + storeCondFailures = 0; + + oldContext->setStatus(ExecContext::Unallocated); +} + +void +CPUExecContext::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); + +#endif +} + + +void +CPUExecContext::unserialize(Checkpoint *cp, const std::string §ion) +{ + 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); +#endif +} + + +void +CPUExecContext::activate(int delay) +{ + if (status() == ExecContext::Active) + return; + + lastActivate = curTick; + + _status = ExecContext::Active; + cpu->activateContext(thread_num, delay); +} + +void +CPUExecContext::suspend() +{ + if (status() == ExecContext::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() == ExecContext::Active); + return; + } +#endif +*/ + _status = ExecContext::Suspended; + cpu->suspendContext(thread_num); +} + +void +CPUExecContext::deallocate() +{ + if (status() == ExecContext::Unallocated) + return; + + _status = ExecContext::Unallocated; + cpu->deallocateContext(thread_num); +} + +void +CPUExecContext::halt() +{ + if (status() == ExecContext::Halted) + return; + + _status = ExecContext::Halted; + cpu->haltContext(thread_num); +} + + +void +CPUExecContext::regStats(const string &name) +{ +} + +void +CPUExecContext::copyArchRegs(ExecContext *xc) +{ + // First loop through the integer registers. + for (int i = 0; i < AlphaISA::NumIntRegs; ++i) { + setIntReg(i, xc->readIntReg(i)); + } + + // Then loop through the floating point registers. + for (int i = 0; i < AlphaISA::NumFloatRegs; ++i) { + setFloatRegDouble(i, xc->readFloatRegDouble(i)); + setFloatRegInt(i, xc->readFloatRegInt(i)); + } + + // Copy misc. registers + regs.miscRegs.copyMiscRegs(xc); + + // Lastly copy PC/NPC + setPC(xc->readPC()); + setNextPC(xc->readNextPC()); +} + |