97 fetch->processCacheCompletion(pkt);
98
99 return true;
100}
101
102template<class Impl>
103void
104FullO3CPU<Impl>::IcachePort::recvReqRetry()
105{
106 fetch->recvReqRetry();
107}
108
109template <class Impl>
110bool
111FullO3CPU<Impl>::DcachePort::recvTimingResp(PacketPtr pkt)
112{
113 return lsq->recvTimingResp(pkt);
114}
115
116template <class Impl>
117void
118FullO3CPU<Impl>::DcachePort::recvTimingSnoopReq(PacketPtr pkt)
119{
120 // X86 ISA: Snooping an invalidation for monitor/mwait
121 if(cpu->getCpuAddrMonitor()->doMonitor(pkt)) {
122 cpu->wakeup();
123 }
124 lsq->recvTimingSnoopReq(pkt);
125}
126
127template <class Impl>
128void
129FullO3CPU<Impl>::DcachePort::recvReqRetry()
130{
131 lsq->recvReqRetry();
132}
133
134template <class Impl>
135FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
136 : Event(CPU_Tick_Pri), cpu(c)
137{
138}
139
140template <class Impl>
141void
142FullO3CPU<Impl>::TickEvent::process()
143{
144 cpu->tick();
145}
146
147template <class Impl>
148const char *
149FullO3CPU<Impl>::TickEvent::description() const
150{
151 return "FullO3CPU tick";
152}
153
154template <class Impl>
155FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
156 : BaseO3CPU(params),
157 itb(params->itb),
158 dtb(params->dtb),
159 tickEvent(this),
160#ifndef NDEBUG
161 instcount(0),
162#endif
163 removeInstsThisCycle(false),
164 fetch(this, params),
165 decode(this, params),
166 rename(this, params),
167 iew(this, params),
168 commit(this, params),
169
170 regFile(params->numPhysIntRegs,
171 params->numPhysFloatRegs,
172 params->numPhysCCRegs),
173
174 freeList(name() + ".freelist", ®File),
175
176 rob(this, params),
177
178 scoreboard(name() + ".scoreboard",
179 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs,
180 TheISA::ZeroReg, TheISA::ZeroReg),
181
182 isa(numThreads, NULL),
183
184 icachePort(&fetch, this),
185 dcachePort(&iew.ldstQueue, this),
186
187 timeBuffer(params->backComSize, params->forwardComSize),
188 fetchQueue(params->backComSize, params->forwardComSize),
189 decodeQueue(params->backComSize, params->forwardComSize),
190 renameQueue(params->backComSize, params->forwardComSize),
191 iewQueue(params->backComSize, params->forwardComSize),
192 activityRec(name(), NumStages,
193 params->backComSize + params->forwardComSize,
194 params->activity),
195
196 globalSeqNum(1),
197 system(params->system),
198 drainManager(NULL),
199 lastRunningCycle(curCycle())
200{
201 if (!params->switched_out) {
202 _status = Running;
203 } else {
204 _status = SwitchedOut;
205 }
206
207 if (params->checker) {
208 BaseCPU *temp_checker = params->checker;
209 checker = dynamic_cast<Checker<Impl> *>(temp_checker);
210 checker->setIcachePort(&icachePort);
211 checker->setSystem(params->system);
212 } else {
213 checker = NULL;
214 }
215
216 if (!FullSystem) {
217 thread.resize(numThreads);
218 tids.resize(numThreads);
219 }
220
221 // The stages also need their CPU pointer setup. However this
222 // must be done at the upper level CPU because they have pointers
223 // to the upper level CPU, and not this FullO3CPU.
224
225 // Set up Pointers to the activeThreads list for each stage
226 fetch.setActiveThreads(&activeThreads);
227 decode.setActiveThreads(&activeThreads);
228 rename.setActiveThreads(&activeThreads);
229 iew.setActiveThreads(&activeThreads);
230 commit.setActiveThreads(&activeThreads);
231
232 // Give each of the stages the time buffer they will use.
233 fetch.setTimeBuffer(&timeBuffer);
234 decode.setTimeBuffer(&timeBuffer);
235 rename.setTimeBuffer(&timeBuffer);
236 iew.setTimeBuffer(&timeBuffer);
237 commit.setTimeBuffer(&timeBuffer);
238
239 // Also setup each of the stages' queues.
240 fetch.setFetchQueue(&fetchQueue);
241 decode.setFetchQueue(&fetchQueue);
242 commit.setFetchQueue(&fetchQueue);
243 decode.setDecodeQueue(&decodeQueue);
244 rename.setDecodeQueue(&decodeQueue);
245 rename.setRenameQueue(&renameQueue);
246 iew.setRenameQueue(&renameQueue);
247 iew.setIEWQueue(&iewQueue);
248 commit.setIEWQueue(&iewQueue);
249 commit.setRenameQueue(&renameQueue);
250
251 commit.setIEWStage(&iew);
252 rename.setIEWStage(&iew);
253 rename.setCommitStage(&commit);
254
255 ThreadID active_threads;
256 if (FullSystem) {
257 active_threads = 1;
258 } else {
259 active_threads = params->workload.size();
260
261 if (active_threads > Impl::MaxThreads) {
262 panic("Workload Size too large. Increase the 'MaxThreads' "
263 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) "
264 "or edit your workload size.");
265 }
266 }
267
268 //Make Sure That this a Valid Architeture
269 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs);
270 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs);
271 assert(params->numPhysCCRegs >= numThreads * TheISA::NumCCRegs);
272
273 rename.setScoreboard(&scoreboard);
274 iew.setScoreboard(&scoreboard);
275
276 // Setup the rename map for whichever stages need it.
277 for (ThreadID tid = 0; tid < numThreads; tid++) {
278 isa[tid] = params->isa[tid];
279
280 // Only Alpha has an FP zero register, so for other ISAs we
281 // use an invalid FP register index to avoid special treatment
282 // of any valid FP reg.
283 RegIndex invalidFPReg = TheISA::NumFloatRegs + 1;
284 RegIndex fpZeroReg =
285 (THE_ISA == ALPHA_ISA) ? TheISA::ZeroReg : invalidFPReg;
286
287 commitRenameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg,
288 &freeList);
289
290 renameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg,
291 &freeList);
292 }
293
294 // Initialize rename map to assign physical registers to the
295 // architectural registers for active threads only.
296 for (ThreadID tid = 0; tid < active_threads; tid++) {
297 for (RegIndex ridx = 0; ridx < TheISA::NumIntRegs; ++ridx) {
298 // Note that we can't use the rename() method because we don't
299 // want special treatment for the zero register at this point
300 PhysRegIndex phys_reg = freeList.getIntReg();
301 renameMap[tid].setIntEntry(ridx, phys_reg);
302 commitRenameMap[tid].setIntEntry(ridx, phys_reg);
303 }
304
305 for (RegIndex ridx = 0; ridx < TheISA::NumFloatRegs; ++ridx) {
306 PhysRegIndex phys_reg = freeList.getFloatReg();
307 renameMap[tid].setFloatEntry(ridx, phys_reg);
308 commitRenameMap[tid].setFloatEntry(ridx, phys_reg);
309 }
310
311 for (RegIndex ridx = 0; ridx < TheISA::NumCCRegs; ++ridx) {
312 PhysRegIndex phys_reg = freeList.getCCReg();
313 renameMap[tid].setCCEntry(ridx, phys_reg);
314 commitRenameMap[tid].setCCEntry(ridx, phys_reg);
315 }
316 }
317
318 rename.setRenameMap(renameMap);
319 commit.setRenameMap(commitRenameMap);
320 rename.setFreeList(&freeList);
321
322 // Setup the ROB for whichever stages need it.
323 commit.setROB(&rob);
324
325 lastActivatedCycle = 0;
326#if 0
327 // Give renameMap & rename stage access to the freeList;
328 for (ThreadID tid = 0; tid < numThreads; tid++)
329 globalSeqNum[tid] = 1;
330#endif
331
332 DPRINTF(O3CPU, "Creating O3CPU object.\n");
333
334 // Setup any thread state.
335 this->thread.resize(this->numThreads);
336
337 for (ThreadID tid = 0; tid < this->numThreads; ++tid) {
338 if (FullSystem) {
339 // SMT is not supported in FS mode yet.
340 assert(this->numThreads == 1);
341 this->thread[tid] = new Thread(this, 0, NULL);
342 } else {
343 if (tid < params->workload.size()) {
344 DPRINTF(O3CPU, "Workload[%i] process is %#x",
345 tid, this->thread[tid]);
346 this->thread[tid] = new typename FullO3CPU<Impl>::Thread(
347 (typename Impl::O3CPU *)(this),
348 tid, params->workload[tid]);
349
350 //usedTids[tid] = true;
351 //threadMap[tid] = tid;
352 } else {
353 //Allocate Empty thread so M5 can use later
354 //when scheduling threads to CPU
355 Process* dummy_proc = NULL;
356
357 this->thread[tid] = new typename FullO3CPU<Impl>::Thread(
358 (typename Impl::O3CPU *)(this),
359 tid, dummy_proc);
360 //usedTids[tid] = false;
361 }
362 }
363
364 ThreadContext *tc;
365
366 // Setup the TC that will serve as the interface to the threads/CPU.
367 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>;
368
369 tc = o3_tc;
370
371 // If we're using a checker, then the TC should be the
372 // CheckerThreadContext.
373 if (params->checker) {
374 tc = new CheckerThreadContext<O3ThreadContext<Impl> >(
375 o3_tc, this->checker);
376 }
377
378 o3_tc->cpu = (typename Impl::O3CPU *)(this);
379 assert(o3_tc->cpu);
380 o3_tc->thread = this->thread[tid];
381
382 if (FullSystem) {
383 // Setup quiesce event.
384 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc);
385 }
386 // Give the thread the TC.
387 this->thread[tid]->tc = tc;
388
389 // Add the TC to the CPU's list of TC's.
390 this->threadContexts.push_back(tc);
391 }
392
393 // FullO3CPU always requires an interrupt controller.
394 if (!params->switched_out && !interrupts) {
395 fatal("FullO3CPU %s has no interrupt controller.\n"
396 "Ensure createInterruptController() is called.\n", name());
397 }
398
399 for (ThreadID tid = 0; tid < this->numThreads; tid++)
400 this->thread[tid]->setFuncExeInst(0);
401}
402
403template <class Impl>
404FullO3CPU<Impl>::~FullO3CPU()
405{
406}
407
408template <class Impl>
409void
410FullO3CPU<Impl>::regProbePoints()
411{
412 BaseCPU::regProbePoints();
413
414 ppInstAccessComplete = new ProbePointArg<PacketPtr>(getProbeManager(), "InstAccessComplete");
415 ppDataAccessComplete = new ProbePointArg<std::pair<DynInstPtr, PacketPtr> >(getProbeManager(), "DataAccessComplete");
416
417 fetch.regProbePoints();
418 iew.regProbePoints();
419 commit.regProbePoints();
420}
421
422template <class Impl>
423void
424FullO3CPU<Impl>::regStats()
425{
426 BaseO3CPU::regStats();
427
428 // Register any of the O3CPU's stats here.
429 timesIdled
430 .name(name() + ".timesIdled")
431 .desc("Number of times that the entire CPU went into an idle state and"
432 " unscheduled itself")
433 .prereq(timesIdled);
434
435 idleCycles
436 .name(name() + ".idleCycles")
437 .desc("Total number of cycles that the CPU has spent unscheduled due "
438 "to idling")
439 .prereq(idleCycles);
440
441 quiesceCycles
442 .name(name() + ".quiesceCycles")
443 .desc("Total number of cycles that CPU has spent quiesced or waiting "
444 "for an interrupt")
445 .prereq(quiesceCycles);
446
447 // Number of Instructions simulated
448 // --------------------------------
449 // Should probably be in Base CPU but need templated
450 // MaxThreads so put in here instead
451 committedInsts
452 .init(numThreads)
453 .name(name() + ".committedInsts")
454 .desc("Number of Instructions Simulated")
455 .flags(Stats::total);
456
457 committedOps
458 .init(numThreads)
459 .name(name() + ".committedOps")
460 .desc("Number of Ops (including micro ops) Simulated")
461 .flags(Stats::total);
462
463 cpi
464 .name(name() + ".cpi")
465 .desc("CPI: Cycles Per Instruction")
466 .precision(6);
467 cpi = numCycles / committedInsts;
468
469 totalCpi
470 .name(name() + ".cpi_total")
471 .desc("CPI: Total CPI of All Threads")
472 .precision(6);
473 totalCpi = numCycles / sum(committedInsts);
474
475 ipc
476 .name(name() + ".ipc")
477 .desc("IPC: Instructions Per Cycle")
478 .precision(6);
479 ipc = committedInsts / numCycles;
480
481 totalIpc
482 .name(name() + ".ipc_total")
483 .desc("IPC: Total IPC of All Threads")
484 .precision(6);
485 totalIpc = sum(committedInsts) / numCycles;
486
487 this->fetch.regStats();
488 this->decode.regStats();
489 this->rename.regStats();
490 this->iew.regStats();
491 this->commit.regStats();
492 this->rob.regStats();
493
494 intRegfileReads
495 .name(name() + ".int_regfile_reads")
496 .desc("number of integer regfile reads")
497 .prereq(intRegfileReads);
498
499 intRegfileWrites
500 .name(name() + ".int_regfile_writes")
501 .desc("number of integer regfile writes")
502 .prereq(intRegfileWrites);
503
504 fpRegfileReads
505 .name(name() + ".fp_regfile_reads")
506 .desc("number of floating regfile reads")
507 .prereq(fpRegfileReads);
508
509 fpRegfileWrites
510 .name(name() + ".fp_regfile_writes")
511 .desc("number of floating regfile writes")
512 .prereq(fpRegfileWrites);
513
514 ccRegfileReads
515 .name(name() + ".cc_regfile_reads")
516 .desc("number of cc regfile reads")
517 .prereq(ccRegfileReads);
518
519 ccRegfileWrites
520 .name(name() + ".cc_regfile_writes")
521 .desc("number of cc regfile writes")
522 .prereq(ccRegfileWrites);
523
524 miscRegfileReads
525 .name(name() + ".misc_regfile_reads")
526 .desc("number of misc regfile reads")
527 .prereq(miscRegfileReads);
528
529 miscRegfileWrites
530 .name(name() + ".misc_regfile_writes")
531 .desc("number of misc regfile writes")
532 .prereq(miscRegfileWrites);
533}
534
535template <class Impl>
536void
537FullO3CPU<Impl>::tick()
538{
539 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n");
540 assert(!switchedOut());
541 assert(getDrainState() != Drainable::Drained);
542
543 ++numCycles;
544 ppCycles->notify(1);
545
546// activity = false;
547
548 //Tick each of the stages
549 fetch.tick();
550
551 decode.tick();
552
553 rename.tick();
554
555 iew.tick();
556
557 commit.tick();
558
559 // Now advance the time buffers
560 timeBuffer.advance();
561
562 fetchQueue.advance();
563 decodeQueue.advance();
564 renameQueue.advance();
565 iewQueue.advance();
566
567 activityRec.advance();
568
569 if (removeInstsThisCycle) {
570 cleanUpRemovedInsts();
571 }
572
573 if (!tickEvent.scheduled()) {
574 if (_status == SwitchedOut) {
575 DPRINTF(O3CPU, "Switched out!\n");
576 // increment stat
577 lastRunningCycle = curCycle();
578 } else if (!activityRec.active() || _status == Idle) {
579 DPRINTF(O3CPU, "Idle!\n");
580 lastRunningCycle = curCycle();
581 timesIdled++;
582 } else {
583 schedule(tickEvent, clockEdge(Cycles(1)));
584 DPRINTF(O3CPU, "Scheduling next tick!\n");
585 }
586 }
587
588 if (!FullSystem)
589 updateThreadPriority();
590
591 tryDrain();
592}
593
594template <class Impl>
595void
596FullO3CPU<Impl>::init()
597{
598 BaseCPU::init();
599
600 for (ThreadID tid = 0; tid < numThreads; ++tid) {
601 // Set noSquashFromTC so that the CPU doesn't squash when initially
602 // setting up registers.
603 thread[tid]->noSquashFromTC = true;
604 // Initialise the ThreadContext's memory proxies
605 thread[tid]->initMemProxies(thread[tid]->getTC());
606 }
607
608 if (FullSystem && !params()->switched_out) {
609 for (ThreadID tid = 0; tid < numThreads; tid++) {
610 ThreadContext *src_tc = threadContexts[tid];
611 TheISA::initCPU(src_tc, src_tc->contextId());
612 }
613 }
614
615 // Clear noSquashFromTC.
616 for (int tid = 0; tid < numThreads; ++tid)
617 thread[tid]->noSquashFromTC = false;
618
619 commit.setThreads(thread);
620}
621
622template <class Impl>
623void
624FullO3CPU<Impl>::startup()
625{
626 BaseCPU::startup();
627 for (int tid = 0; tid < numThreads; ++tid)
628 isa[tid]->startup(threadContexts[tid]);
629
630 fetch.startupStage();
631 decode.startupStage();
632 iew.startupStage();
633 rename.startupStage();
634 commit.startupStage();
635}
636
637template <class Impl>
638void
639FullO3CPU<Impl>::activateThread(ThreadID tid)
640{
641 list<ThreadID>::iterator isActive =
642 std::find(activeThreads.begin(), activeThreads.end(), tid);
643
644 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid);
645 assert(!switchedOut());
646
647 if (isActive == activeThreads.end()) {
648 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
649 tid);
650
651 activeThreads.push_back(tid);
652 }
653}
654
655template <class Impl>
656void
657FullO3CPU<Impl>::deactivateThread(ThreadID tid)
658{
659 //Remove From Active List, if Active
660 list<ThreadID>::iterator thread_it =
661 std::find(activeThreads.begin(), activeThreads.end(), tid);
662
663 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid);
664 assert(!switchedOut());
665
666 if (thread_it != activeThreads.end()) {
667 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
668 tid);
669 activeThreads.erase(thread_it);
670 }
671
672 fetch.deactivateThread(tid);
673 commit.deactivateThread(tid);
674}
675
676template <class Impl>
677Counter
678FullO3CPU<Impl>::totalInsts() const
679{
680 Counter total(0);
681
682 ThreadID size = thread.size();
683 for (ThreadID i = 0; i < size; i++)
684 total += thread[i]->numInst;
685
686 return total;
687}
688
689template <class Impl>
690Counter
691FullO3CPU<Impl>::totalOps() const
692{
693 Counter total(0);
694
695 ThreadID size = thread.size();
696 for (ThreadID i = 0; i < size; i++)
697 total += thread[i]->numOp;
698
699 return total;
700}
701
702template <class Impl>
703void
704FullO3CPU<Impl>::activateContext(ThreadID tid)
705{
706 assert(!switchedOut());
707
708 // Needs to set each stage to running as well.
709 activateThread(tid);
710
711 // We don't want to wake the CPU if it is drained. In that case,
712 // we just want to flag the thread as active and schedule the tick
713 // event from drainResume() instead.
714 if (getDrainState() == Drainable::Drained)
715 return;
716
717 // If we are time 0 or if the last activation time is in the past,
718 // schedule the next tick and wake up the fetch unit
719 if (lastActivatedCycle == 0 || lastActivatedCycle < curTick()) {
720 scheduleTickEvent(Cycles(0));
721
722 // Be sure to signal that there's some activity so the CPU doesn't
723 // deschedule itself.
724 activityRec.activity();
725 fetch.wakeFromQuiesce();
726
727 Cycles cycles(curCycle() - lastRunningCycle);
728 // @todo: This is an oddity that is only here to match the stats
729 if (cycles != 0)
730 --cycles;
731 quiesceCycles += cycles;
732
733 lastActivatedCycle = curTick();
734
735 _status = Running;
736 }
737}
738
739template <class Impl>
740void
741FullO3CPU<Impl>::suspendContext(ThreadID tid)
742{
743 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid);
744 assert(!switchedOut());
745
746 deactivateThread(tid);
747
748 // If this was the last thread then unschedule the tick event.
749 if (activeThreads.size() == 0) {
750 unscheduleTickEvent();
751 lastRunningCycle = curCycle();
752 _status = Idle;
753 }
754
755 DPRINTF(Quiesce, "Suspending Context\n");
756}
757
758template <class Impl>
759void
760FullO3CPU<Impl>::haltContext(ThreadID tid)
761{
762 //For now, this is the same as deallocate
763 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid);
764 assert(!switchedOut());
765
766 deactivateThread(tid);
767 removeThread(tid);
768}
769
770template <class Impl>
771void
772FullO3CPU<Impl>::insertThread(ThreadID tid)
773{
774 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU");
775 // Will change now that the PC and thread state is internal to the CPU
776 // and not in the ThreadContext.
777 ThreadContext *src_tc;
778 if (FullSystem)
779 src_tc = system->threadContexts[tid];
780 else
781 src_tc = tcBase(tid);
782
783 //Bind Int Regs to Rename Map
784 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
785 PhysRegIndex phys_reg = freeList.getIntReg();
786
787 renameMap[tid].setEntry(ireg,phys_reg);
788 scoreboard.setReg(phys_reg);
789 }
790
791 //Bind Float Regs to Rename Map
792 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs;
793 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) {
794 PhysRegIndex phys_reg = freeList.getFloatReg();
795
796 renameMap[tid].setEntry(freg,phys_reg);
797 scoreboard.setReg(phys_reg);
798 }
799
800 //Bind condition-code Regs to Rename Map
801 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs;
802 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs;
803 creg < max_reg; creg++) {
804 PhysRegIndex phys_reg = freeList.getCCReg();
805
806 renameMap[tid].setEntry(creg,phys_reg);
807 scoreboard.setReg(phys_reg);
808 }
809
810 //Copy Thread Data Into RegFile
811 //this->copyFromTC(tid);
812
813 //Set PC/NPC/NNPC
814 pcState(src_tc->pcState(), tid);
815
816 src_tc->setStatus(ThreadContext::Active);
817
818 activateContext(tid);
819
820 //Reset ROB/IQ/LSQ Entries
821 commit.rob->resetEntries();
822 iew.resetEntries();
823}
824
825template <class Impl>
826void
827FullO3CPU<Impl>::removeThread(ThreadID tid)
828{
829 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid);
830
831 // Copy Thread Data From RegFile
832 // If thread is suspended, it might be re-allocated
833 // this->copyToTC(tid);
834
835
836 // @todo: 2-27-2008: Fix how we free up rename mappings
837 // here to alleviate the case for double-freeing registers
838 // in SMT workloads.
839
840 // Unbind Int Regs from Rename Map
841 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
842 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
843 scoreboard.unsetReg(phys_reg);
844 freeList.addReg(phys_reg);
845 }
846
847 // Unbind Float Regs from Rename Map
848 int max_reg = TheISA::FP_Reg_Base + TheISA::NumFloatRegs;
849 for (int freg = TheISA::FP_Reg_Base; freg < max_reg; freg++) {
850 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
851 scoreboard.unsetReg(phys_reg);
852 freeList.addReg(phys_reg);
853 }
854
855 // Unbind condition-code Regs from Rename Map
856 max_reg = TheISA::CC_Reg_Base + TheISA::NumCCRegs;
857 for (int creg = TheISA::CC_Reg_Base; creg < max_reg; creg++) {
858 PhysRegIndex phys_reg = renameMap[tid].lookup(creg);
859 scoreboard.unsetReg(phys_reg);
860 freeList.addReg(phys_reg);
861 }
862
863 // Squash Throughout Pipeline
864 DynInstPtr inst = commit.rob->readHeadInst(tid);
865 InstSeqNum squash_seq_num = inst->seqNum;
866 fetch.squash(0, squash_seq_num, inst, tid);
867 decode.squash(tid);
868 rename.squash(squash_seq_num, tid);
869 iew.squash(tid);
870 iew.ldstQueue.squash(squash_seq_num, tid);
871 commit.rob->squash(squash_seq_num, tid);
872
873
874 assert(iew.instQueue.getCount(tid) == 0);
875 assert(iew.ldstQueue.getCount(tid) == 0);
876
877 // Reset ROB/IQ/LSQ Entries
878
879 // Commented out for now. This should be possible to do by
880 // telling all the pipeline stages to drain first, and then
881 // checking until the drain completes. Once the pipeline is
882 // drained, call resetEntries(). - 10-09-06 ktlim
883/*
884 if (activeThreads.size() >= 1) {
885 commit.rob->resetEntries();
886 iew.resetEntries();
887 }
888*/
889}
890
891template <class Impl>
892Fault
893FullO3CPU<Impl>::hwrei(ThreadID tid)
894{
895#if THE_ISA == ALPHA_ISA
896 // Need to clear the lock flag upon returning from an interrupt.
897 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid);
898
899 this->thread[tid]->kernelStats->hwrei();
900
901 // FIXME: XXX check for interrupts? XXX
902#endif
903 return NoFault;
904}
905
906template <class Impl>
907bool
908FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid)
909{
910#if THE_ISA == ALPHA_ISA
911 if (this->thread[tid]->kernelStats)
912 this->thread[tid]->kernelStats->callpal(palFunc,
913 this->threadContexts[tid]);
914
915 switch (palFunc) {
916 case PAL::halt:
917 halt();
918 if (--System::numSystemsRunning == 0)
919 exitSimLoop("all cpus halted");
920 break;
921
922 case PAL::bpt:
923 case PAL::bugchk:
924 if (this->system->breakpoint())
925 return false;
926 break;
927 }
928#endif
929 return true;
930}
931
932template <class Impl>
933Fault
934FullO3CPU<Impl>::getInterrupts()
935{
936 // Check if there are any outstanding interrupts
937 return this->interrupts->getInterrupt(this->threadContexts[0]);
938}
939
940template <class Impl>
941void
942FullO3CPU<Impl>::processInterrupts(const Fault &interrupt)
943{
944 // Check for interrupts here. For now can copy the code that
945 // exists within isa_fullsys_traits.hh. Also assume that thread 0
946 // is the one that handles the interrupts.
947 // @todo: Possibly consolidate the interrupt checking code.
948 // @todo: Allow other threads to handle interrupts.
949
950 assert(interrupt != NoFault);
951 this->interrupts->updateIntrInfo(this->threadContexts[0]);
952
953 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name());
954 this->trap(interrupt, 0, nullptr);
955}
956
957template <class Impl>
958void
959FullO3CPU<Impl>::trap(const Fault &fault, ThreadID tid,
960 const StaticInstPtr &inst)
961{
962 // Pass the thread's TC into the invoke method.
963 fault->invoke(this->threadContexts[tid], inst);
964}
965
966template <class Impl>
967void
968FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid)
969{
970 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid);
971
972 DPRINTF(Activity,"Activity: syscall() called.\n");
973
974 // Temporarily increase this by one to account for the syscall
975 // instruction.
976 ++(this->thread[tid]->funcExeInst);
977
978 // Execute the actual syscall.
979 this->thread[tid]->syscall(callnum);
980
981 // Decrease funcExeInst by one as the normal commit will handle
982 // incrementing it.
983 --(this->thread[tid]->funcExeInst);
984}
985
986template <class Impl>
987void
988FullO3CPU<Impl>::serializeThread(std::ostream &os, ThreadID tid)
989{
990 thread[tid]->serialize(os);
991}
992
993template <class Impl>
994void
995FullO3CPU<Impl>::unserializeThread(Checkpoint *cp, const std::string §ion,
996 ThreadID tid)
997{
998 thread[tid]->unserialize(cp, section);
999}
1000
1001template <class Impl>
1002unsigned int
1003FullO3CPU<Impl>::drain(DrainManager *drain_manager)
1004{
1005 // If the CPU isn't doing anything, then return immediately.
1006 if (switchedOut()) {
1007 setDrainState(Drainable::Drained);
1008 return 0;
1009 }
1010
1011 DPRINTF(Drain, "Draining...\n");
1012 setDrainState(Drainable::Draining);
1013
1014 // We only need to signal a drain to the commit stage as this
1015 // initiates squashing controls the draining. Once the commit
1016 // stage commits an instruction where it is safe to stop, it'll
1017 // squash the rest of the instructions in the pipeline and force
1018 // the fetch stage to stall. The pipeline will be drained once all
1019 // in-flight instructions have retired.
1020 commit.drain();
1021
1022 // Wake the CPU and record activity so everything can drain out if
1023 // the CPU was not able to immediately drain.
1024 if (!isDrained()) {
1025 drainManager = drain_manager;
1026
1027 wakeCPU();
1028 activityRec.activity();
1029
1030 DPRINTF(Drain, "CPU not drained\n");
1031
1032 return 1;
1033 } else {
1034 setDrainState(Drainable::Drained);
1035 DPRINTF(Drain, "CPU is already drained\n");
1036 if (tickEvent.scheduled())
1037 deschedule(tickEvent);
1038
1039 // Flush out any old data from the time buffers. In
1040 // particular, there might be some data in flight from the
1041 // fetch stage that isn't visible in any of the CPU buffers we
1042 // test in isDrained().
1043 for (int i = 0; i < timeBuffer.getSize(); ++i) {
1044 timeBuffer.advance();
1045 fetchQueue.advance();
1046 decodeQueue.advance();
1047 renameQueue.advance();
1048 iewQueue.advance();
1049 }
1050
1051 drainSanityCheck();
1052 return 0;
1053 }
1054}
1055
1056template <class Impl>
1057bool
1058FullO3CPU<Impl>::tryDrain()
1059{
1060 if (!drainManager || !isDrained())
1061 return false;
1062
1063 if (tickEvent.scheduled())
1064 deschedule(tickEvent);
1065
1066 DPRINTF(Drain, "CPU done draining, processing drain event\n");
1067 drainManager->signalDrainDone();
1068 drainManager = NULL;
1069
1070 return true;
1071}
1072
1073template <class Impl>
1074void
1075FullO3CPU<Impl>::drainSanityCheck() const
1076{
1077 assert(isDrained());
1078 fetch.drainSanityCheck();
1079 decode.drainSanityCheck();
1080 rename.drainSanityCheck();
1081 iew.drainSanityCheck();
1082 commit.drainSanityCheck();
1083}
1084
1085template <class Impl>
1086bool
1087FullO3CPU<Impl>::isDrained() const
1088{
1089 bool drained(true);
1090
1091 if (!instList.empty() || !removeList.empty()) {
1092 DPRINTF(Drain, "Main CPU structures not drained.\n");
1093 drained = false;
1094 }
1095
1096 if (!fetch.isDrained()) {
1097 DPRINTF(Drain, "Fetch not drained.\n");
1098 drained = false;
1099 }
1100
1101 if (!decode.isDrained()) {
1102 DPRINTF(Drain, "Decode not drained.\n");
1103 drained = false;
1104 }
1105
1106 if (!rename.isDrained()) {
1107 DPRINTF(Drain, "Rename not drained.\n");
1108 drained = false;
1109 }
1110
1111 if (!iew.isDrained()) {
1112 DPRINTF(Drain, "IEW not drained.\n");
1113 drained = false;
1114 }
1115
1116 if (!commit.isDrained()) {
1117 DPRINTF(Drain, "Commit not drained.\n");
1118 drained = false;
1119 }
1120
1121 return drained;
1122}
1123
1124template <class Impl>
1125void
1126FullO3CPU<Impl>::commitDrained(ThreadID tid)
1127{
1128 fetch.drainStall(tid);
1129}
1130
1131template <class Impl>
1132void
1133FullO3CPU<Impl>::drainResume()
1134{
1135 setDrainState(Drainable::Running);
1136 if (switchedOut())
1137 return;
1138
1139 DPRINTF(Drain, "Resuming...\n");
1140 verifyMemoryMode();
1141
1142 fetch.drainResume();
1143 commit.drainResume();
1144
1145 _status = Idle;
1146 for (ThreadID i = 0; i < thread.size(); i++) {
1147 if (thread[i]->status() == ThreadContext::Active) {
1148 DPRINTF(Drain, "Activating thread: %i\n", i);
1149 activateThread(i);
1150 _status = Running;
1151 }
1152 }
1153
1154 assert(!tickEvent.scheduled());
1155 if (_status == Running)
1156 schedule(tickEvent, nextCycle());
1157}
1158
1159template <class Impl>
1160void
1161FullO3CPU<Impl>::switchOut()
1162{
1163 DPRINTF(O3CPU, "Switching out\n");
1164 BaseCPU::switchOut();
1165
1166 activityRec.reset();
1167
1168 _status = SwitchedOut;
1169
1170 if (checker)
1171 checker->switchOut();
1172}
1173
1174template <class Impl>
1175void
1176FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
1177{
1178 BaseCPU::takeOverFrom(oldCPU);
1179
1180 fetch.takeOverFrom();
1181 decode.takeOverFrom();
1182 rename.takeOverFrom();
1183 iew.takeOverFrom();
1184 commit.takeOverFrom();
1185
1186 assert(!tickEvent.scheduled());
1187
1188 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU);
1189 if (oldO3CPU)
1190 globalSeqNum = oldO3CPU->globalSeqNum;
1191
1192 lastRunningCycle = curCycle();
1193 _status = Idle;
1194}
1195
1196template <class Impl>
1197void
1198FullO3CPU<Impl>::verifyMemoryMode() const
1199{
1200 if (!system->isTimingMode()) {
1201 fatal("The O3 CPU requires the memory system to be in "
1202 "'timing' mode.\n");
1203 }
1204}
1205
1206template <class Impl>
1207TheISA::MiscReg
1208FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) const
1209{
1210 return this->isa[tid]->readMiscRegNoEffect(misc_reg);
1211}
1212
1213template <class Impl>
1214TheISA::MiscReg
1215FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid)
1216{
1217 miscRegfileReads++;
1218 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid));
1219}
1220
1221template <class Impl>
1222void
1223FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg,
1224 const TheISA::MiscReg &val, ThreadID tid)
1225{
1226 this->isa[tid]->setMiscRegNoEffect(misc_reg, val);
1227}
1228
1229template <class Impl>
1230void
1231FullO3CPU<Impl>::setMiscReg(int misc_reg,
1232 const TheISA::MiscReg &val, ThreadID tid)
1233{
1234 miscRegfileWrites++;
1235 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid));
1236}
1237
1238template <class Impl>
1239uint64_t
1240FullO3CPU<Impl>::readIntReg(int reg_idx)
1241{
1242 intRegfileReads++;
1243 return regFile.readIntReg(reg_idx);
1244}
1245
1246template <class Impl>
1247FloatReg
1248FullO3CPU<Impl>::readFloatReg(int reg_idx)
1249{
1250 fpRegfileReads++;
1251 return regFile.readFloatReg(reg_idx);
1252}
1253
1254template <class Impl>
1255FloatRegBits
1256FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
1257{
1258 fpRegfileReads++;
1259 return regFile.readFloatRegBits(reg_idx);
1260}
1261
1262template <class Impl>
1263CCReg
1264FullO3CPU<Impl>::readCCReg(int reg_idx)
1265{
1266 ccRegfileReads++;
1267 return regFile.readCCReg(reg_idx);
1268}
1269
1270template <class Impl>
1271void
1272FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
1273{
1274 intRegfileWrites++;
1275 regFile.setIntReg(reg_idx, val);
1276}
1277
1278template <class Impl>
1279void
1280FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
1281{
1282 fpRegfileWrites++;
1283 regFile.setFloatReg(reg_idx, val);
1284}
1285
1286template <class Impl>
1287void
1288FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
1289{
1290 fpRegfileWrites++;
1291 regFile.setFloatRegBits(reg_idx, val);
1292}
1293
1294template <class Impl>
1295void
1296FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val)
1297{
1298 ccRegfileWrites++;
1299 regFile.setCCReg(reg_idx, val);
1300}
1301
1302template <class Impl>
1303uint64_t
1304FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid)
1305{
1306 intRegfileReads++;
1307 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1308
1309 return regFile.readIntReg(phys_reg);
1310}
1311
1312template <class Impl>
1313float
1314FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid)
1315{
1316 fpRegfileReads++;
1317 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1318
1319 return regFile.readFloatReg(phys_reg);
1320}
1321
1322template <class Impl>
1323uint64_t
1324FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid)
1325{
1326 fpRegfileReads++;
1327 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1328
1329 return regFile.readFloatRegBits(phys_reg);
1330}
1331
1332template <class Impl>
1333CCReg
1334FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid)
1335{
1336 ccRegfileReads++;
1337 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1338
1339 return regFile.readCCReg(phys_reg);
1340}
1341
1342template <class Impl>
1343void
1344FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid)
1345{
1346 intRegfileWrites++;
1347 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1348
1349 regFile.setIntReg(phys_reg, val);
1350}
1351
1352template <class Impl>
1353void
1354FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid)
1355{
1356 fpRegfileWrites++;
1357 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1358
1359 regFile.setFloatReg(phys_reg, val);
1360}
1361
1362template <class Impl>
1363void
1364FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid)
1365{
1366 fpRegfileWrites++;
1367 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1368
1369 regFile.setFloatRegBits(phys_reg, val);
1370}
1371
1372template <class Impl>
1373void
1374FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid)
1375{
1376 ccRegfileWrites++;
1377 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1378
1379 regFile.setCCReg(phys_reg, val);
1380}
1381
1382template <class Impl>
1383TheISA::PCState
1384FullO3CPU<Impl>::pcState(ThreadID tid)
1385{
1386 return commit.pcState(tid);
1387}
1388
1389template <class Impl>
1390void
1391FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid)
1392{
1393 commit.pcState(val, tid);
1394}
1395
1396template <class Impl>
1397Addr
1398FullO3CPU<Impl>::instAddr(ThreadID tid)
1399{
1400 return commit.instAddr(tid);
1401}
1402
1403template <class Impl>
1404Addr
1405FullO3CPU<Impl>::nextInstAddr(ThreadID tid)
1406{
1407 return commit.nextInstAddr(tid);
1408}
1409
1410template <class Impl>
1411MicroPC
1412FullO3CPU<Impl>::microPC(ThreadID tid)
1413{
1414 return commit.microPC(tid);
1415}
1416
1417template <class Impl>
1418void
1419FullO3CPU<Impl>::squashFromTC(ThreadID tid)
1420{
1421 this->thread[tid]->noSquashFromTC = true;
1422 this->commit.generateTCEvent(tid);
1423}
1424
1425template <class Impl>
1426typename FullO3CPU<Impl>::ListIt
1427FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1428{
1429 instList.push_back(inst);
1430
1431 return --(instList.end());
1432}
1433
1434template <class Impl>
1435void
1436FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst)
1437{
1438 // Keep an instruction count.
1439 if (!inst->isMicroop() || inst->isLastMicroop()) {
1440 thread[tid]->numInst++;
1441 thread[tid]->numInsts++;
1442 committedInsts[tid]++;
1443 system->totalNumInsts++;
1444
1445 // Check for instruction-count-based events.
1446 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1447 system->instEventQueue.serviceEvents(system->totalNumInsts);
1448 }
1449 thread[tid]->numOp++;
1450 thread[tid]->numOps++;
1451 committedOps[tid]++;
1452
1453 probeInstCommit(inst->staticInst);
1454}
1455
1456template <class Impl>
1457void
1458FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1459{
1460 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s "
1461 "[sn:%lli]\n",
1462 inst->threadNumber, inst->pcState(), inst->seqNum);
1463
1464 removeInstsThisCycle = true;
1465
1466 // Remove the front instruction.
1467 removeList.push(inst->getInstListIt());
1468}
1469
1470template <class Impl>
1471void
1472FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid)
1473{
1474 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1475 " list.\n", tid);
1476
1477 ListIt end_it;
1478
1479 bool rob_empty = false;
1480
1481 if (instList.empty()) {
1482 return;
1483 } else if (rob.isEmpty(tid)) {
1484 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1485 end_it = instList.begin();
1486 rob_empty = true;
1487 } else {
1488 end_it = (rob.readTailInst(tid))->getInstListIt();
1489 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1490 }
1491
1492 removeInstsThisCycle = true;
1493
1494 ListIt inst_it = instList.end();
1495
1496 inst_it--;
1497
1498 // Walk through the instruction list, removing any instructions
1499 // that were inserted after the given instruction iterator, end_it.
1500 while (inst_it != end_it) {
1501 assert(!instList.empty());
1502
1503 squashInstIt(inst_it, tid);
1504
1505 inst_it--;
1506 }
1507
1508 // If the ROB was empty, then we actually need to remove the first
1509 // instruction as well.
1510 if (rob_empty) {
1511 squashInstIt(inst_it, tid);
1512 }
1513}
1514
1515template <class Impl>
1516void
1517FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid)
1518{
1519 assert(!instList.empty());
1520
1521 removeInstsThisCycle = true;
1522
1523 ListIt inst_iter = instList.end();
1524
1525 inst_iter--;
1526
1527 DPRINTF(O3CPU, "Deleting instructions from instruction "
1528 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1529 tid, seq_num, (*inst_iter)->seqNum);
1530
1531 while ((*inst_iter)->seqNum > seq_num) {
1532
1533 bool break_loop = (inst_iter == instList.begin());
1534
1535 squashInstIt(inst_iter, tid);
1536
1537 inst_iter--;
1538
1539 if (break_loop)
1540 break;
1541 }
1542}
1543
1544template <class Impl>
1545inline void
1546FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid)
1547{
1548 if ((*instIt)->threadNumber == tid) {
1549 DPRINTF(O3CPU, "Squashing instruction, "
1550 "[tid:%i] [sn:%lli] PC %s\n",
1551 (*instIt)->threadNumber,
1552 (*instIt)->seqNum,
1553 (*instIt)->pcState());
1554
1555 // Mark it as squashed.
1556 (*instIt)->setSquashed();
1557
1558 // @todo: Formulate a consistent method for deleting
1559 // instructions from the instruction list
1560 // Remove the instruction from the list.
1561 removeList.push(instIt);
1562 }
1563}
1564
1565template <class Impl>
1566void
1567FullO3CPU<Impl>::cleanUpRemovedInsts()
1568{
1569 while (!removeList.empty()) {
1570 DPRINTF(O3CPU, "Removing instruction, "
1571 "[tid:%i] [sn:%lli] PC %s\n",
1572 (*removeList.front())->threadNumber,
1573 (*removeList.front())->seqNum,
1574 (*removeList.front())->pcState());
1575
1576 instList.erase(removeList.front());
1577
1578 removeList.pop();
1579 }
1580
1581 removeInstsThisCycle = false;
1582}
1583/*
1584template <class Impl>
1585void
1586FullO3CPU<Impl>::removeAllInsts()
1587{
1588 instList.clear();
1589}
1590*/
1591template <class Impl>
1592void
1593FullO3CPU<Impl>::dumpInsts()
1594{
1595 int num = 0;
1596
1597 ListIt inst_list_it = instList.begin();
1598
1599 cprintf("Dumping Instruction List\n");
1600
1601 while (inst_list_it != instList.end()) {
1602 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1603 "Squashed:%i\n\n",
1604 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber,
1605 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1606 (*inst_list_it)->isSquashed());
1607 inst_list_it++;
1608 ++num;
1609 }
1610}
1611/*
1612template <class Impl>
1613void
1614FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1615{
1616 iew.wakeDependents(inst);
1617}
1618*/
1619template <class Impl>
1620void
1621FullO3CPU<Impl>::wakeCPU()
1622{
1623 if (activityRec.active() || tickEvent.scheduled()) {
1624 DPRINTF(Activity, "CPU already running.\n");
1625 return;
1626 }
1627
1628 DPRINTF(Activity, "Waking up CPU\n");
1629
1630 Cycles cycles(curCycle() - lastRunningCycle);
1631 // @todo: This is an oddity that is only here to match the stats
1632 if (cycles > 1) {
1633 --cycles;
1634 idleCycles += cycles;
1635 numCycles += cycles;
1636 ppCycles->notify(cycles);
1637 }
1638
1639 schedule(tickEvent, clockEdge());
1640}
1641
1642template <class Impl>
1643void
1644FullO3CPU<Impl>::wakeup()
1645{
1646 if (this->thread[0]->status() != ThreadContext::Suspended)
1647 return;
1648
1649 this->wakeCPU();
1650
1651 DPRINTF(Quiesce, "Suspended Processor woken\n");
1652 this->threadContexts[0]->activate();
1653}
1654
1655template <class Impl>
1656ThreadID
1657FullO3CPU<Impl>::getFreeTid()
1658{
1659 for (ThreadID tid = 0; tid < numThreads; tid++) {
1660 if (!tids[tid]) {
1661 tids[tid] = true;
1662 return tid;
1663 }
1664 }
1665
1666 return InvalidThreadID;
1667}
1668
1669template <class Impl>
1670void
1671FullO3CPU<Impl>::updateThreadPriority()
1672{
1673 if (activeThreads.size() > 1) {
1674 //DEFAULT TO ROUND ROBIN SCHEME
1675 //e.g. Move highest priority to end of thread list
1676 list<ThreadID>::iterator list_begin = activeThreads.begin();
1677
1678 unsigned high_thread = *list_begin;
1679
1680 activeThreads.erase(list_begin);
1681
1682 activeThreads.push_back(high_thread);
1683 }
1684}
1685
1686// Forward declaration of FullO3CPU.
1687template class FullO3CPU<O3CPUImpl>;
| 98 fetch->processCacheCompletion(pkt);
99
100 return true;
101}
102
103template<class Impl>
104void
105FullO3CPU<Impl>::IcachePort::recvReqRetry()
106{
107 fetch->recvReqRetry();
108}
109
110template <class Impl>
111bool
112FullO3CPU<Impl>::DcachePort::recvTimingResp(PacketPtr pkt)
113{
114 return lsq->recvTimingResp(pkt);
115}
116
117template <class Impl>
118void
119FullO3CPU<Impl>::DcachePort::recvTimingSnoopReq(PacketPtr pkt)
120{
121 // X86 ISA: Snooping an invalidation for monitor/mwait
122 if(cpu->getCpuAddrMonitor()->doMonitor(pkt)) {
123 cpu->wakeup();
124 }
125 lsq->recvTimingSnoopReq(pkt);
126}
127
128template <class Impl>
129void
130FullO3CPU<Impl>::DcachePort::recvReqRetry()
131{
132 lsq->recvReqRetry();
133}
134
135template <class Impl>
136FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
137 : Event(CPU_Tick_Pri), cpu(c)
138{
139}
140
141template <class Impl>
142void
143FullO3CPU<Impl>::TickEvent::process()
144{
145 cpu->tick();
146}
147
148template <class Impl>
149const char *
150FullO3CPU<Impl>::TickEvent::description() const
151{
152 return "FullO3CPU tick";
153}
154
155template <class Impl>
156FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
157 : BaseO3CPU(params),
158 itb(params->itb),
159 dtb(params->dtb),
160 tickEvent(this),
161#ifndef NDEBUG
162 instcount(0),
163#endif
164 removeInstsThisCycle(false),
165 fetch(this, params),
166 decode(this, params),
167 rename(this, params),
168 iew(this, params),
169 commit(this, params),
170
171 regFile(params->numPhysIntRegs,
172 params->numPhysFloatRegs,
173 params->numPhysCCRegs),
174
175 freeList(name() + ".freelist", ®File),
176
177 rob(this, params),
178
179 scoreboard(name() + ".scoreboard",
180 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs,
181 TheISA::ZeroReg, TheISA::ZeroReg),
182
183 isa(numThreads, NULL),
184
185 icachePort(&fetch, this),
186 dcachePort(&iew.ldstQueue, this),
187
188 timeBuffer(params->backComSize, params->forwardComSize),
189 fetchQueue(params->backComSize, params->forwardComSize),
190 decodeQueue(params->backComSize, params->forwardComSize),
191 renameQueue(params->backComSize, params->forwardComSize),
192 iewQueue(params->backComSize, params->forwardComSize),
193 activityRec(name(), NumStages,
194 params->backComSize + params->forwardComSize,
195 params->activity),
196
197 globalSeqNum(1),
198 system(params->system),
199 drainManager(NULL),
200 lastRunningCycle(curCycle())
201{
202 if (!params->switched_out) {
203 _status = Running;
204 } else {
205 _status = SwitchedOut;
206 }
207
208 if (params->checker) {
209 BaseCPU *temp_checker = params->checker;
210 checker = dynamic_cast<Checker<Impl> *>(temp_checker);
211 checker->setIcachePort(&icachePort);
212 checker->setSystem(params->system);
213 } else {
214 checker = NULL;
215 }
216
217 if (!FullSystem) {
218 thread.resize(numThreads);
219 tids.resize(numThreads);
220 }
221
222 // The stages also need their CPU pointer setup. However this
223 // must be done at the upper level CPU because they have pointers
224 // to the upper level CPU, and not this FullO3CPU.
225
226 // Set up Pointers to the activeThreads list for each stage
227 fetch.setActiveThreads(&activeThreads);
228 decode.setActiveThreads(&activeThreads);
229 rename.setActiveThreads(&activeThreads);
230 iew.setActiveThreads(&activeThreads);
231 commit.setActiveThreads(&activeThreads);
232
233 // Give each of the stages the time buffer they will use.
234 fetch.setTimeBuffer(&timeBuffer);
235 decode.setTimeBuffer(&timeBuffer);
236 rename.setTimeBuffer(&timeBuffer);
237 iew.setTimeBuffer(&timeBuffer);
238 commit.setTimeBuffer(&timeBuffer);
239
240 // Also setup each of the stages' queues.
241 fetch.setFetchQueue(&fetchQueue);
242 decode.setFetchQueue(&fetchQueue);
243 commit.setFetchQueue(&fetchQueue);
244 decode.setDecodeQueue(&decodeQueue);
245 rename.setDecodeQueue(&decodeQueue);
246 rename.setRenameQueue(&renameQueue);
247 iew.setRenameQueue(&renameQueue);
248 iew.setIEWQueue(&iewQueue);
249 commit.setIEWQueue(&iewQueue);
250 commit.setRenameQueue(&renameQueue);
251
252 commit.setIEWStage(&iew);
253 rename.setIEWStage(&iew);
254 rename.setCommitStage(&commit);
255
256 ThreadID active_threads;
257 if (FullSystem) {
258 active_threads = 1;
259 } else {
260 active_threads = params->workload.size();
261
262 if (active_threads > Impl::MaxThreads) {
263 panic("Workload Size too large. Increase the 'MaxThreads' "
264 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) "
265 "or edit your workload size.");
266 }
267 }
268
269 //Make Sure That this a Valid Architeture
270 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs);
271 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs);
272 assert(params->numPhysCCRegs >= numThreads * TheISA::NumCCRegs);
273
274 rename.setScoreboard(&scoreboard);
275 iew.setScoreboard(&scoreboard);
276
277 // Setup the rename map for whichever stages need it.
278 for (ThreadID tid = 0; tid < numThreads; tid++) {
279 isa[tid] = params->isa[tid];
280
281 // Only Alpha has an FP zero register, so for other ISAs we
282 // use an invalid FP register index to avoid special treatment
283 // of any valid FP reg.
284 RegIndex invalidFPReg = TheISA::NumFloatRegs + 1;
285 RegIndex fpZeroReg =
286 (THE_ISA == ALPHA_ISA) ? TheISA::ZeroReg : invalidFPReg;
287
288 commitRenameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg,
289 &freeList);
290
291 renameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg,
292 &freeList);
293 }
294
295 // Initialize rename map to assign physical registers to the
296 // architectural registers for active threads only.
297 for (ThreadID tid = 0; tid < active_threads; tid++) {
298 for (RegIndex ridx = 0; ridx < TheISA::NumIntRegs; ++ridx) {
299 // Note that we can't use the rename() method because we don't
300 // want special treatment for the zero register at this point
301 PhysRegIndex phys_reg = freeList.getIntReg();
302 renameMap[tid].setIntEntry(ridx, phys_reg);
303 commitRenameMap[tid].setIntEntry(ridx, phys_reg);
304 }
305
306 for (RegIndex ridx = 0; ridx < TheISA::NumFloatRegs; ++ridx) {
307 PhysRegIndex phys_reg = freeList.getFloatReg();
308 renameMap[tid].setFloatEntry(ridx, phys_reg);
309 commitRenameMap[tid].setFloatEntry(ridx, phys_reg);
310 }
311
312 for (RegIndex ridx = 0; ridx < TheISA::NumCCRegs; ++ridx) {
313 PhysRegIndex phys_reg = freeList.getCCReg();
314 renameMap[tid].setCCEntry(ridx, phys_reg);
315 commitRenameMap[tid].setCCEntry(ridx, phys_reg);
316 }
317 }
318
319 rename.setRenameMap(renameMap);
320 commit.setRenameMap(commitRenameMap);
321 rename.setFreeList(&freeList);
322
323 // Setup the ROB for whichever stages need it.
324 commit.setROB(&rob);
325
326 lastActivatedCycle = 0;
327#if 0
328 // Give renameMap & rename stage access to the freeList;
329 for (ThreadID tid = 0; tid < numThreads; tid++)
330 globalSeqNum[tid] = 1;
331#endif
332
333 DPRINTF(O3CPU, "Creating O3CPU object.\n");
334
335 // Setup any thread state.
336 this->thread.resize(this->numThreads);
337
338 for (ThreadID tid = 0; tid < this->numThreads; ++tid) {
339 if (FullSystem) {
340 // SMT is not supported in FS mode yet.
341 assert(this->numThreads == 1);
342 this->thread[tid] = new Thread(this, 0, NULL);
343 } else {
344 if (tid < params->workload.size()) {
345 DPRINTF(O3CPU, "Workload[%i] process is %#x",
346 tid, this->thread[tid]);
347 this->thread[tid] = new typename FullO3CPU<Impl>::Thread(
348 (typename Impl::O3CPU *)(this),
349 tid, params->workload[tid]);
350
351 //usedTids[tid] = true;
352 //threadMap[tid] = tid;
353 } else {
354 //Allocate Empty thread so M5 can use later
355 //when scheduling threads to CPU
356 Process* dummy_proc = NULL;
357
358 this->thread[tid] = new typename FullO3CPU<Impl>::Thread(
359 (typename Impl::O3CPU *)(this),
360 tid, dummy_proc);
361 //usedTids[tid] = false;
362 }
363 }
364
365 ThreadContext *tc;
366
367 // Setup the TC that will serve as the interface to the threads/CPU.
368 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>;
369
370 tc = o3_tc;
371
372 // If we're using a checker, then the TC should be the
373 // CheckerThreadContext.
374 if (params->checker) {
375 tc = new CheckerThreadContext<O3ThreadContext<Impl> >(
376 o3_tc, this->checker);
377 }
378
379 o3_tc->cpu = (typename Impl::O3CPU *)(this);
380 assert(o3_tc->cpu);
381 o3_tc->thread = this->thread[tid];
382
383 if (FullSystem) {
384 // Setup quiesce event.
385 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc);
386 }
387 // Give the thread the TC.
388 this->thread[tid]->tc = tc;
389
390 // Add the TC to the CPU's list of TC's.
391 this->threadContexts.push_back(tc);
392 }
393
394 // FullO3CPU always requires an interrupt controller.
395 if (!params->switched_out && !interrupts) {
396 fatal("FullO3CPU %s has no interrupt controller.\n"
397 "Ensure createInterruptController() is called.\n", name());
398 }
399
400 for (ThreadID tid = 0; tid < this->numThreads; tid++)
401 this->thread[tid]->setFuncExeInst(0);
402}
403
404template <class Impl>
405FullO3CPU<Impl>::~FullO3CPU()
406{
407}
408
409template <class Impl>
410void
411FullO3CPU<Impl>::regProbePoints()
412{
413 BaseCPU::regProbePoints();
414
415 ppInstAccessComplete = new ProbePointArg<PacketPtr>(getProbeManager(), "InstAccessComplete");
416 ppDataAccessComplete = new ProbePointArg<std::pair<DynInstPtr, PacketPtr> >(getProbeManager(), "DataAccessComplete");
417
418 fetch.regProbePoints();
419 iew.regProbePoints();
420 commit.regProbePoints();
421}
422
423template <class Impl>
424void
425FullO3CPU<Impl>::regStats()
426{
427 BaseO3CPU::regStats();
428
429 // Register any of the O3CPU's stats here.
430 timesIdled
431 .name(name() + ".timesIdled")
432 .desc("Number of times that the entire CPU went into an idle state and"
433 " unscheduled itself")
434 .prereq(timesIdled);
435
436 idleCycles
437 .name(name() + ".idleCycles")
438 .desc("Total number of cycles that the CPU has spent unscheduled due "
439 "to idling")
440 .prereq(idleCycles);
441
442 quiesceCycles
443 .name(name() + ".quiesceCycles")
444 .desc("Total number of cycles that CPU has spent quiesced or waiting "
445 "for an interrupt")
446 .prereq(quiesceCycles);
447
448 // Number of Instructions simulated
449 // --------------------------------
450 // Should probably be in Base CPU but need templated
451 // MaxThreads so put in here instead
452 committedInsts
453 .init(numThreads)
454 .name(name() + ".committedInsts")
455 .desc("Number of Instructions Simulated")
456 .flags(Stats::total);
457
458 committedOps
459 .init(numThreads)
460 .name(name() + ".committedOps")
461 .desc("Number of Ops (including micro ops) Simulated")
462 .flags(Stats::total);
463
464 cpi
465 .name(name() + ".cpi")
466 .desc("CPI: Cycles Per Instruction")
467 .precision(6);
468 cpi = numCycles / committedInsts;
469
470 totalCpi
471 .name(name() + ".cpi_total")
472 .desc("CPI: Total CPI of All Threads")
473 .precision(6);
474 totalCpi = numCycles / sum(committedInsts);
475
476 ipc
477 .name(name() + ".ipc")
478 .desc("IPC: Instructions Per Cycle")
479 .precision(6);
480 ipc = committedInsts / numCycles;
481
482 totalIpc
483 .name(name() + ".ipc_total")
484 .desc("IPC: Total IPC of All Threads")
485 .precision(6);
486 totalIpc = sum(committedInsts) / numCycles;
487
488 this->fetch.regStats();
489 this->decode.regStats();
490 this->rename.regStats();
491 this->iew.regStats();
492 this->commit.regStats();
493 this->rob.regStats();
494
495 intRegfileReads
496 .name(name() + ".int_regfile_reads")
497 .desc("number of integer regfile reads")
498 .prereq(intRegfileReads);
499
500 intRegfileWrites
501 .name(name() + ".int_regfile_writes")
502 .desc("number of integer regfile writes")
503 .prereq(intRegfileWrites);
504
505 fpRegfileReads
506 .name(name() + ".fp_regfile_reads")
507 .desc("number of floating regfile reads")
508 .prereq(fpRegfileReads);
509
510 fpRegfileWrites
511 .name(name() + ".fp_regfile_writes")
512 .desc("number of floating regfile writes")
513 .prereq(fpRegfileWrites);
514
515 ccRegfileReads
516 .name(name() + ".cc_regfile_reads")
517 .desc("number of cc regfile reads")
518 .prereq(ccRegfileReads);
519
520 ccRegfileWrites
521 .name(name() + ".cc_regfile_writes")
522 .desc("number of cc regfile writes")
523 .prereq(ccRegfileWrites);
524
525 miscRegfileReads
526 .name(name() + ".misc_regfile_reads")
527 .desc("number of misc regfile reads")
528 .prereq(miscRegfileReads);
529
530 miscRegfileWrites
531 .name(name() + ".misc_regfile_writes")
532 .desc("number of misc regfile writes")
533 .prereq(miscRegfileWrites);
534}
535
536template <class Impl>
537void
538FullO3CPU<Impl>::tick()
539{
540 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n");
541 assert(!switchedOut());
542 assert(getDrainState() != Drainable::Drained);
543
544 ++numCycles;
545 ppCycles->notify(1);
546
547// activity = false;
548
549 //Tick each of the stages
550 fetch.tick();
551
552 decode.tick();
553
554 rename.tick();
555
556 iew.tick();
557
558 commit.tick();
559
560 // Now advance the time buffers
561 timeBuffer.advance();
562
563 fetchQueue.advance();
564 decodeQueue.advance();
565 renameQueue.advance();
566 iewQueue.advance();
567
568 activityRec.advance();
569
570 if (removeInstsThisCycle) {
571 cleanUpRemovedInsts();
572 }
573
574 if (!tickEvent.scheduled()) {
575 if (_status == SwitchedOut) {
576 DPRINTF(O3CPU, "Switched out!\n");
577 // increment stat
578 lastRunningCycle = curCycle();
579 } else if (!activityRec.active() || _status == Idle) {
580 DPRINTF(O3CPU, "Idle!\n");
581 lastRunningCycle = curCycle();
582 timesIdled++;
583 } else {
584 schedule(tickEvent, clockEdge(Cycles(1)));
585 DPRINTF(O3CPU, "Scheduling next tick!\n");
586 }
587 }
588
589 if (!FullSystem)
590 updateThreadPriority();
591
592 tryDrain();
593}
594
595template <class Impl>
596void
597FullO3CPU<Impl>::init()
598{
599 BaseCPU::init();
600
601 for (ThreadID tid = 0; tid < numThreads; ++tid) {
602 // Set noSquashFromTC so that the CPU doesn't squash when initially
603 // setting up registers.
604 thread[tid]->noSquashFromTC = true;
605 // Initialise the ThreadContext's memory proxies
606 thread[tid]->initMemProxies(thread[tid]->getTC());
607 }
608
609 if (FullSystem && !params()->switched_out) {
610 for (ThreadID tid = 0; tid < numThreads; tid++) {
611 ThreadContext *src_tc = threadContexts[tid];
612 TheISA::initCPU(src_tc, src_tc->contextId());
613 }
614 }
615
616 // Clear noSquashFromTC.
617 for (int tid = 0; tid < numThreads; ++tid)
618 thread[tid]->noSquashFromTC = false;
619
620 commit.setThreads(thread);
621}
622
623template <class Impl>
624void
625FullO3CPU<Impl>::startup()
626{
627 BaseCPU::startup();
628 for (int tid = 0; tid < numThreads; ++tid)
629 isa[tid]->startup(threadContexts[tid]);
630
631 fetch.startupStage();
632 decode.startupStage();
633 iew.startupStage();
634 rename.startupStage();
635 commit.startupStage();
636}
637
638template <class Impl>
639void
640FullO3CPU<Impl>::activateThread(ThreadID tid)
641{
642 list<ThreadID>::iterator isActive =
643 std::find(activeThreads.begin(), activeThreads.end(), tid);
644
645 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid);
646 assert(!switchedOut());
647
648 if (isActive == activeThreads.end()) {
649 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
650 tid);
651
652 activeThreads.push_back(tid);
653 }
654}
655
656template <class Impl>
657void
658FullO3CPU<Impl>::deactivateThread(ThreadID tid)
659{
660 //Remove From Active List, if Active
661 list<ThreadID>::iterator thread_it =
662 std::find(activeThreads.begin(), activeThreads.end(), tid);
663
664 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid);
665 assert(!switchedOut());
666
667 if (thread_it != activeThreads.end()) {
668 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
669 tid);
670 activeThreads.erase(thread_it);
671 }
672
673 fetch.deactivateThread(tid);
674 commit.deactivateThread(tid);
675}
676
677template <class Impl>
678Counter
679FullO3CPU<Impl>::totalInsts() const
680{
681 Counter total(0);
682
683 ThreadID size = thread.size();
684 for (ThreadID i = 0; i < size; i++)
685 total += thread[i]->numInst;
686
687 return total;
688}
689
690template <class Impl>
691Counter
692FullO3CPU<Impl>::totalOps() const
693{
694 Counter total(0);
695
696 ThreadID size = thread.size();
697 for (ThreadID i = 0; i < size; i++)
698 total += thread[i]->numOp;
699
700 return total;
701}
702
703template <class Impl>
704void
705FullO3CPU<Impl>::activateContext(ThreadID tid)
706{
707 assert(!switchedOut());
708
709 // Needs to set each stage to running as well.
710 activateThread(tid);
711
712 // We don't want to wake the CPU if it is drained. In that case,
713 // we just want to flag the thread as active and schedule the tick
714 // event from drainResume() instead.
715 if (getDrainState() == Drainable::Drained)
716 return;
717
718 // If we are time 0 or if the last activation time is in the past,
719 // schedule the next tick and wake up the fetch unit
720 if (lastActivatedCycle == 0 || lastActivatedCycle < curTick()) {
721 scheduleTickEvent(Cycles(0));
722
723 // Be sure to signal that there's some activity so the CPU doesn't
724 // deschedule itself.
725 activityRec.activity();
726 fetch.wakeFromQuiesce();
727
728 Cycles cycles(curCycle() - lastRunningCycle);
729 // @todo: This is an oddity that is only here to match the stats
730 if (cycles != 0)
731 --cycles;
732 quiesceCycles += cycles;
733
734 lastActivatedCycle = curTick();
735
736 _status = Running;
737 }
738}
739
740template <class Impl>
741void
742FullO3CPU<Impl>::suspendContext(ThreadID tid)
743{
744 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid);
745 assert(!switchedOut());
746
747 deactivateThread(tid);
748
749 // If this was the last thread then unschedule the tick event.
750 if (activeThreads.size() == 0) {
751 unscheduleTickEvent();
752 lastRunningCycle = curCycle();
753 _status = Idle;
754 }
755
756 DPRINTF(Quiesce, "Suspending Context\n");
757}
758
759template <class Impl>
760void
761FullO3CPU<Impl>::haltContext(ThreadID tid)
762{
763 //For now, this is the same as deallocate
764 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid);
765 assert(!switchedOut());
766
767 deactivateThread(tid);
768 removeThread(tid);
769}
770
771template <class Impl>
772void
773FullO3CPU<Impl>::insertThread(ThreadID tid)
774{
775 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU");
776 // Will change now that the PC and thread state is internal to the CPU
777 // and not in the ThreadContext.
778 ThreadContext *src_tc;
779 if (FullSystem)
780 src_tc = system->threadContexts[tid];
781 else
782 src_tc = tcBase(tid);
783
784 //Bind Int Regs to Rename Map
785 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
786 PhysRegIndex phys_reg = freeList.getIntReg();
787
788 renameMap[tid].setEntry(ireg,phys_reg);
789 scoreboard.setReg(phys_reg);
790 }
791
792 //Bind Float Regs to Rename Map
793 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs;
794 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) {
795 PhysRegIndex phys_reg = freeList.getFloatReg();
796
797 renameMap[tid].setEntry(freg,phys_reg);
798 scoreboard.setReg(phys_reg);
799 }
800
801 //Bind condition-code Regs to Rename Map
802 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs;
803 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs;
804 creg < max_reg; creg++) {
805 PhysRegIndex phys_reg = freeList.getCCReg();
806
807 renameMap[tid].setEntry(creg,phys_reg);
808 scoreboard.setReg(phys_reg);
809 }
810
811 //Copy Thread Data Into RegFile
812 //this->copyFromTC(tid);
813
814 //Set PC/NPC/NNPC
815 pcState(src_tc->pcState(), tid);
816
817 src_tc->setStatus(ThreadContext::Active);
818
819 activateContext(tid);
820
821 //Reset ROB/IQ/LSQ Entries
822 commit.rob->resetEntries();
823 iew.resetEntries();
824}
825
826template <class Impl>
827void
828FullO3CPU<Impl>::removeThread(ThreadID tid)
829{
830 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid);
831
832 // Copy Thread Data From RegFile
833 // If thread is suspended, it might be re-allocated
834 // this->copyToTC(tid);
835
836
837 // @todo: 2-27-2008: Fix how we free up rename mappings
838 // here to alleviate the case for double-freeing registers
839 // in SMT workloads.
840
841 // Unbind Int Regs from Rename Map
842 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
843 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
844 scoreboard.unsetReg(phys_reg);
845 freeList.addReg(phys_reg);
846 }
847
848 // Unbind Float Regs from Rename Map
849 int max_reg = TheISA::FP_Reg_Base + TheISA::NumFloatRegs;
850 for (int freg = TheISA::FP_Reg_Base; freg < max_reg; freg++) {
851 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
852 scoreboard.unsetReg(phys_reg);
853 freeList.addReg(phys_reg);
854 }
855
856 // Unbind condition-code Regs from Rename Map
857 max_reg = TheISA::CC_Reg_Base + TheISA::NumCCRegs;
858 for (int creg = TheISA::CC_Reg_Base; creg < max_reg; creg++) {
859 PhysRegIndex phys_reg = renameMap[tid].lookup(creg);
860 scoreboard.unsetReg(phys_reg);
861 freeList.addReg(phys_reg);
862 }
863
864 // Squash Throughout Pipeline
865 DynInstPtr inst = commit.rob->readHeadInst(tid);
866 InstSeqNum squash_seq_num = inst->seqNum;
867 fetch.squash(0, squash_seq_num, inst, tid);
868 decode.squash(tid);
869 rename.squash(squash_seq_num, tid);
870 iew.squash(tid);
871 iew.ldstQueue.squash(squash_seq_num, tid);
872 commit.rob->squash(squash_seq_num, tid);
873
874
875 assert(iew.instQueue.getCount(tid) == 0);
876 assert(iew.ldstQueue.getCount(tid) == 0);
877
878 // Reset ROB/IQ/LSQ Entries
879
880 // Commented out for now. This should be possible to do by
881 // telling all the pipeline stages to drain first, and then
882 // checking until the drain completes. Once the pipeline is
883 // drained, call resetEntries(). - 10-09-06 ktlim
884/*
885 if (activeThreads.size() >= 1) {
886 commit.rob->resetEntries();
887 iew.resetEntries();
888 }
889*/
890}
891
892template <class Impl>
893Fault
894FullO3CPU<Impl>::hwrei(ThreadID tid)
895{
896#if THE_ISA == ALPHA_ISA
897 // Need to clear the lock flag upon returning from an interrupt.
898 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid);
899
900 this->thread[tid]->kernelStats->hwrei();
901
902 // FIXME: XXX check for interrupts? XXX
903#endif
904 return NoFault;
905}
906
907template <class Impl>
908bool
909FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid)
910{
911#if THE_ISA == ALPHA_ISA
912 if (this->thread[tid]->kernelStats)
913 this->thread[tid]->kernelStats->callpal(palFunc,
914 this->threadContexts[tid]);
915
916 switch (palFunc) {
917 case PAL::halt:
918 halt();
919 if (--System::numSystemsRunning == 0)
920 exitSimLoop("all cpus halted");
921 break;
922
923 case PAL::bpt:
924 case PAL::bugchk:
925 if (this->system->breakpoint())
926 return false;
927 break;
928 }
929#endif
930 return true;
931}
932
933template <class Impl>
934Fault
935FullO3CPU<Impl>::getInterrupts()
936{
937 // Check if there are any outstanding interrupts
938 return this->interrupts->getInterrupt(this->threadContexts[0]);
939}
940
941template <class Impl>
942void
943FullO3CPU<Impl>::processInterrupts(const Fault &interrupt)
944{
945 // Check for interrupts here. For now can copy the code that
946 // exists within isa_fullsys_traits.hh. Also assume that thread 0
947 // is the one that handles the interrupts.
948 // @todo: Possibly consolidate the interrupt checking code.
949 // @todo: Allow other threads to handle interrupts.
950
951 assert(interrupt != NoFault);
952 this->interrupts->updateIntrInfo(this->threadContexts[0]);
953
954 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name());
955 this->trap(interrupt, 0, nullptr);
956}
957
958template <class Impl>
959void
960FullO3CPU<Impl>::trap(const Fault &fault, ThreadID tid,
961 const StaticInstPtr &inst)
962{
963 // Pass the thread's TC into the invoke method.
964 fault->invoke(this->threadContexts[tid], inst);
965}
966
967template <class Impl>
968void
969FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid)
970{
971 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid);
972
973 DPRINTF(Activity,"Activity: syscall() called.\n");
974
975 // Temporarily increase this by one to account for the syscall
976 // instruction.
977 ++(this->thread[tid]->funcExeInst);
978
979 // Execute the actual syscall.
980 this->thread[tid]->syscall(callnum);
981
982 // Decrease funcExeInst by one as the normal commit will handle
983 // incrementing it.
984 --(this->thread[tid]->funcExeInst);
985}
986
987template <class Impl>
988void
989FullO3CPU<Impl>::serializeThread(std::ostream &os, ThreadID tid)
990{
991 thread[tid]->serialize(os);
992}
993
994template <class Impl>
995void
996FullO3CPU<Impl>::unserializeThread(Checkpoint *cp, const std::string §ion,
997 ThreadID tid)
998{
999 thread[tid]->unserialize(cp, section);
1000}
1001
1002template <class Impl>
1003unsigned int
1004FullO3CPU<Impl>::drain(DrainManager *drain_manager)
1005{
1006 // If the CPU isn't doing anything, then return immediately.
1007 if (switchedOut()) {
1008 setDrainState(Drainable::Drained);
1009 return 0;
1010 }
1011
1012 DPRINTF(Drain, "Draining...\n");
1013 setDrainState(Drainable::Draining);
1014
1015 // We only need to signal a drain to the commit stage as this
1016 // initiates squashing controls the draining. Once the commit
1017 // stage commits an instruction where it is safe to stop, it'll
1018 // squash the rest of the instructions in the pipeline and force
1019 // the fetch stage to stall. The pipeline will be drained once all
1020 // in-flight instructions have retired.
1021 commit.drain();
1022
1023 // Wake the CPU and record activity so everything can drain out if
1024 // the CPU was not able to immediately drain.
1025 if (!isDrained()) {
1026 drainManager = drain_manager;
1027
1028 wakeCPU();
1029 activityRec.activity();
1030
1031 DPRINTF(Drain, "CPU not drained\n");
1032
1033 return 1;
1034 } else {
1035 setDrainState(Drainable::Drained);
1036 DPRINTF(Drain, "CPU is already drained\n");
1037 if (tickEvent.scheduled())
1038 deschedule(tickEvent);
1039
1040 // Flush out any old data from the time buffers. In
1041 // particular, there might be some data in flight from the
1042 // fetch stage that isn't visible in any of the CPU buffers we
1043 // test in isDrained().
1044 for (int i = 0; i < timeBuffer.getSize(); ++i) {
1045 timeBuffer.advance();
1046 fetchQueue.advance();
1047 decodeQueue.advance();
1048 renameQueue.advance();
1049 iewQueue.advance();
1050 }
1051
1052 drainSanityCheck();
1053 return 0;
1054 }
1055}
1056
1057template <class Impl>
1058bool
1059FullO3CPU<Impl>::tryDrain()
1060{
1061 if (!drainManager || !isDrained())
1062 return false;
1063
1064 if (tickEvent.scheduled())
1065 deschedule(tickEvent);
1066
1067 DPRINTF(Drain, "CPU done draining, processing drain event\n");
1068 drainManager->signalDrainDone();
1069 drainManager = NULL;
1070
1071 return true;
1072}
1073
1074template <class Impl>
1075void
1076FullO3CPU<Impl>::drainSanityCheck() const
1077{
1078 assert(isDrained());
1079 fetch.drainSanityCheck();
1080 decode.drainSanityCheck();
1081 rename.drainSanityCheck();
1082 iew.drainSanityCheck();
1083 commit.drainSanityCheck();
1084}
1085
1086template <class Impl>
1087bool
1088FullO3CPU<Impl>::isDrained() const
1089{
1090 bool drained(true);
1091
1092 if (!instList.empty() || !removeList.empty()) {
1093 DPRINTF(Drain, "Main CPU structures not drained.\n");
1094 drained = false;
1095 }
1096
1097 if (!fetch.isDrained()) {
1098 DPRINTF(Drain, "Fetch not drained.\n");
1099 drained = false;
1100 }
1101
1102 if (!decode.isDrained()) {
1103 DPRINTF(Drain, "Decode not drained.\n");
1104 drained = false;
1105 }
1106
1107 if (!rename.isDrained()) {
1108 DPRINTF(Drain, "Rename not drained.\n");
1109 drained = false;
1110 }
1111
1112 if (!iew.isDrained()) {
1113 DPRINTF(Drain, "IEW not drained.\n");
1114 drained = false;
1115 }
1116
1117 if (!commit.isDrained()) {
1118 DPRINTF(Drain, "Commit not drained.\n");
1119 drained = false;
1120 }
1121
1122 return drained;
1123}
1124
1125template <class Impl>
1126void
1127FullO3CPU<Impl>::commitDrained(ThreadID tid)
1128{
1129 fetch.drainStall(tid);
1130}
1131
1132template <class Impl>
1133void
1134FullO3CPU<Impl>::drainResume()
1135{
1136 setDrainState(Drainable::Running);
1137 if (switchedOut())
1138 return;
1139
1140 DPRINTF(Drain, "Resuming...\n");
1141 verifyMemoryMode();
1142
1143 fetch.drainResume();
1144 commit.drainResume();
1145
1146 _status = Idle;
1147 for (ThreadID i = 0; i < thread.size(); i++) {
1148 if (thread[i]->status() == ThreadContext::Active) {
1149 DPRINTF(Drain, "Activating thread: %i\n", i);
1150 activateThread(i);
1151 _status = Running;
1152 }
1153 }
1154
1155 assert(!tickEvent.scheduled());
1156 if (_status == Running)
1157 schedule(tickEvent, nextCycle());
1158}
1159
1160template <class Impl>
1161void
1162FullO3CPU<Impl>::switchOut()
1163{
1164 DPRINTF(O3CPU, "Switching out\n");
1165 BaseCPU::switchOut();
1166
1167 activityRec.reset();
1168
1169 _status = SwitchedOut;
1170
1171 if (checker)
1172 checker->switchOut();
1173}
1174
1175template <class Impl>
1176void
1177FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
1178{
1179 BaseCPU::takeOverFrom(oldCPU);
1180
1181 fetch.takeOverFrom();
1182 decode.takeOverFrom();
1183 rename.takeOverFrom();
1184 iew.takeOverFrom();
1185 commit.takeOverFrom();
1186
1187 assert(!tickEvent.scheduled());
1188
1189 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU);
1190 if (oldO3CPU)
1191 globalSeqNum = oldO3CPU->globalSeqNum;
1192
1193 lastRunningCycle = curCycle();
1194 _status = Idle;
1195}
1196
1197template <class Impl>
1198void
1199FullO3CPU<Impl>::verifyMemoryMode() const
1200{
1201 if (!system->isTimingMode()) {
1202 fatal("The O3 CPU requires the memory system to be in "
1203 "'timing' mode.\n");
1204 }
1205}
1206
1207template <class Impl>
1208TheISA::MiscReg
1209FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) const
1210{
1211 return this->isa[tid]->readMiscRegNoEffect(misc_reg);
1212}
1213
1214template <class Impl>
1215TheISA::MiscReg
1216FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid)
1217{
1218 miscRegfileReads++;
1219 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid));
1220}
1221
1222template <class Impl>
1223void
1224FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg,
1225 const TheISA::MiscReg &val, ThreadID tid)
1226{
1227 this->isa[tid]->setMiscRegNoEffect(misc_reg, val);
1228}
1229
1230template <class Impl>
1231void
1232FullO3CPU<Impl>::setMiscReg(int misc_reg,
1233 const TheISA::MiscReg &val, ThreadID tid)
1234{
1235 miscRegfileWrites++;
1236 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid));
1237}
1238
1239template <class Impl>
1240uint64_t
1241FullO3CPU<Impl>::readIntReg(int reg_idx)
1242{
1243 intRegfileReads++;
1244 return regFile.readIntReg(reg_idx);
1245}
1246
1247template <class Impl>
1248FloatReg
1249FullO3CPU<Impl>::readFloatReg(int reg_idx)
1250{
1251 fpRegfileReads++;
1252 return regFile.readFloatReg(reg_idx);
1253}
1254
1255template <class Impl>
1256FloatRegBits
1257FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
1258{
1259 fpRegfileReads++;
1260 return regFile.readFloatRegBits(reg_idx);
1261}
1262
1263template <class Impl>
1264CCReg
1265FullO3CPU<Impl>::readCCReg(int reg_idx)
1266{
1267 ccRegfileReads++;
1268 return regFile.readCCReg(reg_idx);
1269}
1270
1271template <class Impl>
1272void
1273FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
1274{
1275 intRegfileWrites++;
1276 regFile.setIntReg(reg_idx, val);
1277}
1278
1279template <class Impl>
1280void
1281FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
1282{
1283 fpRegfileWrites++;
1284 regFile.setFloatReg(reg_idx, val);
1285}
1286
1287template <class Impl>
1288void
1289FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
1290{
1291 fpRegfileWrites++;
1292 regFile.setFloatRegBits(reg_idx, val);
1293}
1294
1295template <class Impl>
1296void
1297FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val)
1298{
1299 ccRegfileWrites++;
1300 regFile.setCCReg(reg_idx, val);
1301}
1302
1303template <class Impl>
1304uint64_t
1305FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid)
1306{
1307 intRegfileReads++;
1308 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1309
1310 return regFile.readIntReg(phys_reg);
1311}
1312
1313template <class Impl>
1314float
1315FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid)
1316{
1317 fpRegfileReads++;
1318 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1319
1320 return regFile.readFloatReg(phys_reg);
1321}
1322
1323template <class Impl>
1324uint64_t
1325FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid)
1326{
1327 fpRegfileReads++;
1328 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1329
1330 return regFile.readFloatRegBits(phys_reg);
1331}
1332
1333template <class Impl>
1334CCReg
1335FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid)
1336{
1337 ccRegfileReads++;
1338 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1339
1340 return regFile.readCCReg(phys_reg);
1341}
1342
1343template <class Impl>
1344void
1345FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid)
1346{
1347 intRegfileWrites++;
1348 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1349
1350 regFile.setIntReg(phys_reg, val);
1351}
1352
1353template <class Impl>
1354void
1355FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid)
1356{
1357 fpRegfileWrites++;
1358 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1359
1360 regFile.setFloatReg(phys_reg, val);
1361}
1362
1363template <class Impl>
1364void
1365FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid)
1366{
1367 fpRegfileWrites++;
1368 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1369
1370 regFile.setFloatRegBits(phys_reg, val);
1371}
1372
1373template <class Impl>
1374void
1375FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid)
1376{
1377 ccRegfileWrites++;
1378 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1379
1380 regFile.setCCReg(phys_reg, val);
1381}
1382
1383template <class Impl>
1384TheISA::PCState
1385FullO3CPU<Impl>::pcState(ThreadID tid)
1386{
1387 return commit.pcState(tid);
1388}
1389
1390template <class Impl>
1391void
1392FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid)
1393{
1394 commit.pcState(val, tid);
1395}
1396
1397template <class Impl>
1398Addr
1399FullO3CPU<Impl>::instAddr(ThreadID tid)
1400{
1401 return commit.instAddr(tid);
1402}
1403
1404template <class Impl>
1405Addr
1406FullO3CPU<Impl>::nextInstAddr(ThreadID tid)
1407{
1408 return commit.nextInstAddr(tid);
1409}
1410
1411template <class Impl>
1412MicroPC
1413FullO3CPU<Impl>::microPC(ThreadID tid)
1414{
1415 return commit.microPC(tid);
1416}
1417
1418template <class Impl>
1419void
1420FullO3CPU<Impl>::squashFromTC(ThreadID tid)
1421{
1422 this->thread[tid]->noSquashFromTC = true;
1423 this->commit.generateTCEvent(tid);
1424}
1425
1426template <class Impl>
1427typename FullO3CPU<Impl>::ListIt
1428FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1429{
1430 instList.push_back(inst);
1431
1432 return --(instList.end());
1433}
1434
1435template <class Impl>
1436void
1437FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst)
1438{
1439 // Keep an instruction count.
1440 if (!inst->isMicroop() || inst->isLastMicroop()) {
1441 thread[tid]->numInst++;
1442 thread[tid]->numInsts++;
1443 committedInsts[tid]++;
1444 system->totalNumInsts++;
1445
1446 // Check for instruction-count-based events.
1447 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1448 system->instEventQueue.serviceEvents(system->totalNumInsts);
1449 }
1450 thread[tid]->numOp++;
1451 thread[tid]->numOps++;
1452 committedOps[tid]++;
1453
1454 probeInstCommit(inst->staticInst);
1455}
1456
1457template <class Impl>
1458void
1459FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1460{
1461 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s "
1462 "[sn:%lli]\n",
1463 inst->threadNumber, inst->pcState(), inst->seqNum);
1464
1465 removeInstsThisCycle = true;
1466
1467 // Remove the front instruction.
1468 removeList.push(inst->getInstListIt());
1469}
1470
1471template <class Impl>
1472void
1473FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid)
1474{
1475 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1476 " list.\n", tid);
1477
1478 ListIt end_it;
1479
1480 bool rob_empty = false;
1481
1482 if (instList.empty()) {
1483 return;
1484 } else if (rob.isEmpty(tid)) {
1485 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1486 end_it = instList.begin();
1487 rob_empty = true;
1488 } else {
1489 end_it = (rob.readTailInst(tid))->getInstListIt();
1490 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1491 }
1492
1493 removeInstsThisCycle = true;
1494
1495 ListIt inst_it = instList.end();
1496
1497 inst_it--;
1498
1499 // Walk through the instruction list, removing any instructions
1500 // that were inserted after the given instruction iterator, end_it.
1501 while (inst_it != end_it) {
1502 assert(!instList.empty());
1503
1504 squashInstIt(inst_it, tid);
1505
1506 inst_it--;
1507 }
1508
1509 // If the ROB was empty, then we actually need to remove the first
1510 // instruction as well.
1511 if (rob_empty) {
1512 squashInstIt(inst_it, tid);
1513 }
1514}
1515
1516template <class Impl>
1517void
1518FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid)
1519{
1520 assert(!instList.empty());
1521
1522 removeInstsThisCycle = true;
1523
1524 ListIt inst_iter = instList.end();
1525
1526 inst_iter--;
1527
1528 DPRINTF(O3CPU, "Deleting instructions from instruction "
1529 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1530 tid, seq_num, (*inst_iter)->seqNum);
1531
1532 while ((*inst_iter)->seqNum > seq_num) {
1533
1534 bool break_loop = (inst_iter == instList.begin());
1535
1536 squashInstIt(inst_iter, tid);
1537
1538 inst_iter--;
1539
1540 if (break_loop)
1541 break;
1542 }
1543}
1544
1545template <class Impl>
1546inline void
1547FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid)
1548{
1549 if ((*instIt)->threadNumber == tid) {
1550 DPRINTF(O3CPU, "Squashing instruction, "
1551 "[tid:%i] [sn:%lli] PC %s\n",
1552 (*instIt)->threadNumber,
1553 (*instIt)->seqNum,
1554 (*instIt)->pcState());
1555
1556 // Mark it as squashed.
1557 (*instIt)->setSquashed();
1558
1559 // @todo: Formulate a consistent method for deleting
1560 // instructions from the instruction list
1561 // Remove the instruction from the list.
1562 removeList.push(instIt);
1563 }
1564}
1565
1566template <class Impl>
1567void
1568FullO3CPU<Impl>::cleanUpRemovedInsts()
1569{
1570 while (!removeList.empty()) {
1571 DPRINTF(O3CPU, "Removing instruction, "
1572 "[tid:%i] [sn:%lli] PC %s\n",
1573 (*removeList.front())->threadNumber,
1574 (*removeList.front())->seqNum,
1575 (*removeList.front())->pcState());
1576
1577 instList.erase(removeList.front());
1578
1579 removeList.pop();
1580 }
1581
1582 removeInstsThisCycle = false;
1583}
1584/*
1585template <class Impl>
1586void
1587FullO3CPU<Impl>::removeAllInsts()
1588{
1589 instList.clear();
1590}
1591*/
1592template <class Impl>
1593void
1594FullO3CPU<Impl>::dumpInsts()
1595{
1596 int num = 0;
1597
1598 ListIt inst_list_it = instList.begin();
1599
1600 cprintf("Dumping Instruction List\n");
1601
1602 while (inst_list_it != instList.end()) {
1603 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1604 "Squashed:%i\n\n",
1605 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber,
1606 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1607 (*inst_list_it)->isSquashed());
1608 inst_list_it++;
1609 ++num;
1610 }
1611}
1612/*
1613template <class Impl>
1614void
1615FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1616{
1617 iew.wakeDependents(inst);
1618}
1619*/
1620template <class Impl>
1621void
1622FullO3CPU<Impl>::wakeCPU()
1623{
1624 if (activityRec.active() || tickEvent.scheduled()) {
1625 DPRINTF(Activity, "CPU already running.\n");
1626 return;
1627 }
1628
1629 DPRINTF(Activity, "Waking up CPU\n");
1630
1631 Cycles cycles(curCycle() - lastRunningCycle);
1632 // @todo: This is an oddity that is only here to match the stats
1633 if (cycles > 1) {
1634 --cycles;
1635 idleCycles += cycles;
1636 numCycles += cycles;
1637 ppCycles->notify(cycles);
1638 }
1639
1640 schedule(tickEvent, clockEdge());
1641}
1642
1643template <class Impl>
1644void
1645FullO3CPU<Impl>::wakeup()
1646{
1647 if (this->thread[0]->status() != ThreadContext::Suspended)
1648 return;
1649
1650 this->wakeCPU();
1651
1652 DPRINTF(Quiesce, "Suspended Processor woken\n");
1653 this->threadContexts[0]->activate();
1654}
1655
1656template <class Impl>
1657ThreadID
1658FullO3CPU<Impl>::getFreeTid()
1659{
1660 for (ThreadID tid = 0; tid < numThreads; tid++) {
1661 if (!tids[tid]) {
1662 tids[tid] = true;
1663 return tid;
1664 }
1665 }
1666
1667 return InvalidThreadID;
1668}
1669
1670template <class Impl>
1671void
1672FullO3CPU<Impl>::updateThreadPriority()
1673{
1674 if (activeThreads.size() > 1) {
1675 //DEFAULT TO ROUND ROBIN SCHEME
1676 //e.g. Move highest priority to end of thread list
1677 list<ThreadID>::iterator list_begin = activeThreads.begin();
1678
1679 unsigned high_thread = *list_begin;
1680
1681 activeThreads.erase(list_begin);
1682
1683 activeThreads.push_back(high_thread);
1684 }
1685}
1686
1687// Forward declaration of FullO3CPU.
1688template class FullO3CPU<O3CPUImpl>;
|