1/*
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Kevin Lim
29 * Korey Sewell
30 */
31
32#include "config/full_system.hh"
33#include "config/use_checker.hh"
34
35#if FULL_SYSTEM
36#include "sim/system.hh"
37#else
38#include "sim/process.hh"
39#endif
40
41#include "cpu/activity.hh"
42#include "cpu/simple_thread.hh"
43#include "cpu/thread_context.hh"
44#include "cpu/o3/isa_specific.hh"
45#include "cpu/o3/cpu.hh"
46
47#include "sim/root.hh"
48#include "sim/stat_control.hh"
49
50#if USE_CHECKER
51#include "cpu/checker/cpu.hh"
52#endif
53
54using namespace std;
55using namespace TheISA;
56
57BaseO3CPU::BaseO3CPU(Params *params)
58 : BaseCPU(params), cpu_id(0)
59{
60}
61
62void
63BaseO3CPU::regStats()
64{
65 BaseCPU::regStats();
66}
67
68template <class Impl>
69FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
70 : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c)
71{
72}
73
74template <class Impl>
75void
76FullO3CPU<Impl>::TickEvent::process()
77{
78 cpu->tick();
79}
80
81template <class Impl>
82const char *
83FullO3CPU<Impl>::TickEvent::description()
84{
85 return "FullO3CPU tick event";
86}
87
88template <class Impl>
89FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent()
90 : Event(&mainEventQueue, CPU_Tick_Pri)
91{
92}
93
94template <class Impl>
95void
96FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num,
97 FullO3CPU<Impl> *thread_cpu)
98{
99 tid = thread_num;
100 cpu = thread_cpu;
101}
102
103template <class Impl>
104void
105FullO3CPU<Impl>::ActivateThreadEvent::process()
106{
107 cpu->activateThread(tid);
108}
109
110template <class Impl>
111const char *
112FullO3CPU<Impl>::ActivateThreadEvent::description()
113{
114 return "FullO3CPU \"Activate Thread\" event";
115}
116
117template <class Impl>
118FullO3CPU<Impl>::FullO3CPU(Params *params)
119 : BaseO3CPU(params),
120 tickEvent(this),
121 removeInstsThisCycle(false),
122 fetch(params),
123 decode(params),
124 rename(params),
125 iew(params),
126 commit(params),
127
128 regFile(params->numPhysIntRegs, params->numPhysFloatRegs),
129
130 freeList(params->numberOfThreads,
131 TheISA::NumIntRegs, params->numPhysIntRegs,
132 TheISA::NumFloatRegs, params->numPhysFloatRegs),
133
134 rob(params->numROBEntries, params->squashWidth,
135 params->smtROBPolicy, params->smtROBThreshold,
136 params->numberOfThreads),
137
138 scoreboard(params->numberOfThreads,
139 TheISA::NumIntRegs, params->numPhysIntRegs,
140 TheISA::NumFloatRegs, params->numPhysFloatRegs,
141 TheISA::NumMiscRegs * number_of_threads,
142 TheISA::ZeroReg),
143
144 // For now just have these time buffers be pretty big.
145 // @todo: Make these time buffer sizes parameters or derived
146 // from latencies
147 timeBuffer(5, 5),
148 fetchQueue(5, 5),
149 decodeQueue(5, 5),
150 renameQueue(5, 5),
151 iewQueue(5, 5),
152 activityRec(NumStages, 10, params->activity),
153
154 globalSeqNum(1),
155
156#if FULL_SYSTEM
157 system(params->system),
158 physmem(system->physmem),
159#endif // FULL_SYSTEM
160 mem(params->mem),
161 drainCount(0),
162 deferRegistration(params->deferRegistration),
163 numThreads(number_of_threads)
164{
165 _status = Idle;
166
167 checker = NULL;
168
169 if (params->checker) {
170#if USE_CHECKER
171 BaseCPU *temp_checker = params->checker;
172 checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker);
173 checker->setMemory(mem);
174#if FULL_SYSTEM
175 checker->setSystem(params->system);
176#endif
177#else
178 panic("Checker enabled but not compiled in!");
179#endif // USE_CHECKER
180 }
181
182#if !FULL_SYSTEM
183 thread.resize(number_of_threads);
184 tids.resize(number_of_threads);
185#endif
186
187 // The stages also need their CPU pointer setup. However this
188 // must be done at the upper level CPU because they have pointers
189 // to the upper level CPU, and not this FullO3CPU.
190
191 // Set up Pointers to the activeThreads list for each stage
192 fetch.setActiveThreads(&activeThreads);
193 decode.setActiveThreads(&activeThreads);
194 rename.setActiveThreads(&activeThreads);
195 iew.setActiveThreads(&activeThreads);
196 commit.setActiveThreads(&activeThreads);
197
198 // Give each of the stages the time buffer they will use.
199 fetch.setTimeBuffer(&timeBuffer);
200 decode.setTimeBuffer(&timeBuffer);
201 rename.setTimeBuffer(&timeBuffer);
202 iew.setTimeBuffer(&timeBuffer);
203 commit.setTimeBuffer(&timeBuffer);
204
205 // Also setup each of the stages' queues.
206 fetch.setFetchQueue(&fetchQueue);
207 decode.setFetchQueue(&fetchQueue);
208 commit.setFetchQueue(&fetchQueue);
209 decode.setDecodeQueue(&decodeQueue);
210 rename.setDecodeQueue(&decodeQueue);
211 rename.setRenameQueue(&renameQueue);
212 iew.setRenameQueue(&renameQueue);
213 iew.setIEWQueue(&iewQueue);
214 commit.setIEWQueue(&iewQueue);
215 commit.setRenameQueue(&renameQueue);
216
217 commit.setFetchStage(&fetch);
218 commit.setIEWStage(&iew);
219 rename.setIEWStage(&iew);
220 rename.setCommitStage(&commit);
221
222#if !FULL_SYSTEM
223 int active_threads = params->workload.size();
224
225 if (active_threads > Impl::MaxThreads) {
226 panic("Workload Size too large. Increase the 'MaxThreads'"
227 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) or "
228 "edit your workload size.");
229 }
230#else
231 int active_threads = 1;
232#endif
233
234 //Make Sure That this a Valid Architeture
235 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs);
236 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs);
237
238 rename.setScoreboard(&scoreboard);
239 iew.setScoreboard(&scoreboard);
240
241 // Setup the rename map for whichever stages need it.
242 PhysRegIndex lreg_idx = 0;
243 PhysRegIndex freg_idx = params->numPhysIntRegs; //Index to 1 after int regs
244
245 for (int tid=0; tid < numThreads; tid++) {
246 bool bindRegs = (tid <= active_threads - 1);
247
248 commitRenameMap[tid].init(TheISA::NumIntRegs,
249 params->numPhysIntRegs,
250 lreg_idx, //Index for Logical. Regs
251
252 TheISA::NumFloatRegs,
253 params->numPhysFloatRegs,
254 freg_idx, //Index for Float Regs
255
256 TheISA::NumMiscRegs,
257
258 TheISA::ZeroReg,
259 TheISA::ZeroReg,
260
261 tid,
262 false);
263
264 renameMap[tid].init(TheISA::NumIntRegs,
265 params->numPhysIntRegs,
266 lreg_idx, //Index for Logical. Regs
267
268 TheISA::NumFloatRegs,
269 params->numPhysFloatRegs,
270 freg_idx, //Index for Float Regs
271
272 TheISA::NumMiscRegs,
273
274 TheISA::ZeroReg,
275 TheISA::ZeroReg,
276
277 tid,
278 bindRegs);
279 }
280
281 rename.setRenameMap(renameMap);
282 commit.setRenameMap(commitRenameMap);
283
284 // Give renameMap & rename stage access to the freeList;
285 for (int i=0; i < numThreads; i++) {
286 renameMap[i].setFreeList(&freeList);
287 }
288 rename.setFreeList(&freeList);
289
290 // Setup the ROB for whichever stages need it.
291 commit.setROB(&rob);
292
293 lastRunningCycle = curTick;
294
295 lastActivatedCycle = -1;
296
297 contextSwitch = false;
298}
299
300template <class Impl>
301FullO3CPU<Impl>::~FullO3CPU()
302{
303}
304
305template <class Impl>
306void
307FullO3CPU<Impl>::fullCPURegStats()
308{
309 BaseO3CPU::regStats();
310
311 // Register any of the O3CPU's stats here.
312 timesIdled
313 .name(name() + ".timesIdled")
314 .desc("Number of times that the entire CPU went into an idle state and"
315 " unscheduled itself")
316 .prereq(timesIdled);
317
318 idleCycles
319 .name(name() + ".idleCycles")
320 .desc("Total number of cycles that the CPU has spent unscheduled due "
321 "to idling")
322 .prereq(idleCycles);
323
324 // Number of Instructions simulated
325 // --------------------------------
326 // Should probably be in Base CPU but need templated
327 // MaxThreads so put in here instead
328 committedInsts
329 .init(numThreads)
330 .name(name() + ".committedInsts")
331 .desc("Number of Instructions Simulated");
332
333 totalCommittedInsts
334 .name(name() + ".committedInsts_total")
335 .desc("Number of Instructions Simulated");
336
337 cpi
338 .name(name() + ".cpi")
339 .desc("CPI: Cycles Per Instruction")
340 .precision(6);
341 cpi = simTicks / committedInsts;
342
343 totalCpi
344 .name(name() + ".cpi_total")
345 .desc("CPI: Total CPI of All Threads")
346 .precision(6);
347 totalCpi = simTicks / totalCommittedInsts;
348
349 ipc
350 .name(name() + ".ipc")
351 .desc("IPC: Instructions Per Cycle")
352 .precision(6);
353 ipc = committedInsts / simTicks;
354
355 totalIpc
356 .name(name() + ".ipc_total")
357 .desc("IPC: Total IPC of All Threads")
358 .precision(6);
359 totalIpc = totalCommittedInsts / simTicks;
360
361}
362
363template <class Impl>
364void
365FullO3CPU<Impl>::tick()
366{
367 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n");
368
369 ++numCycles;
370
371// activity = false;
372
373 //Tick each of the stages
374 fetch.tick();
375
376 decode.tick();
377
378 rename.tick();
379
380 iew.tick();
381
382 commit.tick();
383
384#if !FULL_SYSTEM
385 doContextSwitch();
386#endif
387
388 // Now advance the time buffers
389 timeBuffer.advance();
390
391 fetchQueue.advance();
392 decodeQueue.advance();
393 renameQueue.advance();
394 iewQueue.advance();
395
396 activityRec.advance();
397
398 if (removeInstsThisCycle) {
399 cleanUpRemovedInsts();
400 }
401
402 if (!tickEvent.scheduled()) {
403 if (_status == SwitchedOut) {
404 // increment stat
405 lastRunningCycle = curTick;
406 } else if (!activityRec.active()) {
407 lastRunningCycle = curTick;
408 timesIdled++;
409 } else {
410 tickEvent.schedule(curTick + cycles(1));
411 }
412 }
413
414#if !FULL_SYSTEM
415 updateThreadPriority();
416#endif
417
418}
419
420template <class Impl>
421void
422FullO3CPU<Impl>::init()
423{
424 if (!deferRegistration) {
425 registerThreadContexts();
426 }
427
428 // Set inSyscall so that the CPU doesn't squash when initially
429 // setting up registers.
430 for (int i = 0; i < number_of_threads; ++i)
431 thread[i]->inSyscall = true;
432
433 for (int tid=0; tid < number_of_threads; tid++) {
434#if FULL_SYSTEM
435 ThreadContext *src_tc = threadContexts[tid];
436#else
437 ThreadContext *src_tc = thread[tid]->getTC();
438#endif
439 // Threads start in the Suspended State
440 if (src_tc->status() != ThreadContext::Suspended) {
441 continue;
442 }
443
444#if FULL_SYSTEM
445 TheISA::initCPU(src_tc, src_tc->readCpuId());
446#endif
447 }
448
449 // Clear inSyscall.
450 for (int i = 0; i < number_of_threads; ++i)
451 thread[i]->inSyscall = false;
452
453 // Initialize stages.
454 fetch.initStage();
455 iew.initStage();
456 rename.initStage();
457 commit.initStage();
458
459 commit.setThreads(thread);
460}
461
462template <class Impl>
463void
464FullO3CPU<Impl>::insertThread(unsigned tid)
465{
466 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU");
467 // Will change now that the PC and thread state is internal to the CPU
468 // and not in the ThreadContext.
469#if FULL_SYSTEM
470 ThreadContext *src_tc = system->threadContexts[tid];
471#else
472 ThreadContext *src_tc = tcBase(tid);
473#endif
474
475 //Bind Int Regs to Rename Map
476 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
477 PhysRegIndex phys_reg = freeList.getIntReg();
478
479 renameMap[tid].setEntry(ireg,phys_reg);
480 scoreboard.setReg(phys_reg);
481 }
482
483 //Bind Float Regs to Rename Map
484 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
485 PhysRegIndex phys_reg = freeList.getFloatReg();
486
487 renameMap[tid].setEntry(freg,phys_reg);
488 scoreboard.setReg(phys_reg);
489 }
490
491 //Copy Thread Data Into RegFile
492 //this->copyFromTC(tid);
493
494 //Set PC/NPC/NNPC
495 setPC(src_tc->readPC(), tid);
496 setNextPC(src_tc->readNextPC(), tid);
497#if THE_ISA != ALPHA_ISA
498 setNextNPC(src_tc->readNextNPC(), tid);
499#endif
500
501 src_tc->setStatus(ThreadContext::Active);
502
503 activateContext(tid,1);
504
505 //Reset ROB/IQ/LSQ Entries
506 commit.rob->resetEntries();
507 iew.resetEntries();
508}
509
510template <class Impl>
511void
512FullO3CPU<Impl>::removeThread(unsigned tid)
513{
514 DPRINTF(O3CPU,"[tid:%i] Removing thread from CPU.");
515
516 // Copy Thread Data From RegFile
517 // If thread is suspended, it might be re-allocated
518 //this->copyToTC(tid);
519
520 // Unbind Int Regs from Rename Map
521 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
522 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
523
524 scoreboard.unsetReg(phys_reg);
525 freeList.addReg(phys_reg);
526 }
527
528 // Unbind Float Regs from Rename Map
529 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
530 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
531
532 scoreboard.unsetReg(phys_reg);
533 freeList.addReg(phys_reg);
534 }
535
536 // Squash Throughout Pipeline
537 fetch.squash(0,tid);
538 decode.squash(tid);
539 rename.squash(tid);
540
541 assert(iew.ldstQueue.getCount(tid) == 0);
542
543 // Reset ROB/IQ/LSQ Entries
544 if (activeThreads.size() >= 1) {
545 commit.rob->resetEntries();
546 iew.resetEntries();
547 }
548}
549
550
551template <class Impl>
552void
553FullO3CPU<Impl>::activateWhenReady(int tid)
554{
555 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming"
556 "(e.g. PhysRegs/ROB/IQ/LSQ) \n",
557 tid);
558
559 bool ready = true;
560
561 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) {
562 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
563 "Phys. Int. Regs.\n",
564 tid);
565 ready = false;
566 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) {
567 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
568 "Phys. Float. Regs.\n",
569 tid);
570 ready = false;
571 } else if (commit.rob->numFreeEntries() >=
572 commit.rob->entryAmount(activeThreads.size() + 1)) {
573 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
574 "ROB entries.\n",
575 tid);
576 ready = false;
577 } else if (iew.instQueue.numFreeEntries() >=
578 iew.instQueue.entryAmount(activeThreads.size() + 1)) {
579 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
580 "IQ entries.\n",
581 tid);
582 ready = false;
583 } else if (iew.ldstQueue.numFreeEntries() >=
584 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) {
585 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
586 "LSQ entries.\n",
587 tid);
588 ready = false;
589 }
590
591 if (ready) {
592 insertThread(tid);
593
594 contextSwitch = false;
595
596 cpuWaitList.remove(tid);
597 } else {
598 suspendContext(tid);
599
600 //blocks fetch
601 contextSwitch = true;
602
603 //do waitlist
604 cpuWaitList.push_back(tid);
605 }
606}
607
608template <class Impl>
609void
610FullO3CPU<Impl>::activateThread(unsigned int tid)
611{
612 list<unsigned>::iterator isActive = find(
613 activeThreads.begin(), activeThreads.end(), tid);
614
615 if (isActive == activeThreads.end()) {
616 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
617 tid);
618
619 activeThreads.push_back(tid);
620 }
621}
622
623
624template <class Impl>
625void
626FullO3CPU<Impl>::activateContext(int tid, int delay)
627{
628 // Needs to set each stage to running as well.
629 if (delay){
630 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate "
631 "on cycle %d\n", tid, curTick + cycles(delay));
632 scheduleActivateThreadEvent(tid, delay);
633 } else {
634 activateThread(tid);
635 }
636
637 if(lastActivatedCycle < curTick) {
638 scheduleTickEvent(delay);
639
640 // Be sure to signal that there's some activity so the CPU doesn't
641 // deschedule itself.
642 activityRec.activity();
643 fetch.wakeFromQuiesce();
644
645 lastActivatedCycle = curTick;
646
647 _status = Running;
648 }
649}
650
651template <class Impl>
652void
653FullO3CPU<Impl>::suspendContext(int tid)
654{
655 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid);
656 unscheduleTickEvent();
657 _status = Idle;
658/*
659 //Remove From Active List, if Active
660 list<unsigned>::iterator isActive = find(
661 activeThreads.begin(), activeThreads.end(), tid);
662
663 if (isActive != activeThreads.end()) {
664 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
665 tid);
666 activeThreads.erase(isActive);
667 }
668*/
669}
670
671template <class Impl>
672void
673FullO3CPU<Impl>::deallocateContext(int tid)
674{
675 DPRINTF(O3CPU,"[tid:%i]: Deallocating Thread Context", tid);
676
677 //Remove From Active List, if Active
678 list<unsigned>::iterator thread_it =
679 find(activeThreads.begin(), activeThreads.end(), tid);
680
681 if (thread_it != activeThreads.end()) {
682 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
683 tid);
684 activeThreads.erase(thread_it);
685
686 removeThread(tid);
687 }
688}
689
690template <class Impl>
691void
692FullO3CPU<Impl>::haltContext(int tid)
693{
694 DPRINTF(O3CPU,"[tid:%i]: Halting Thread Context", tid);
695/*
696 //Remove From Active List, if Active
697 list<unsigned>::iterator isActive = find(
698 activeThreads.begin(), activeThreads.end(), tid);
699
700 if (isActive != activeThreads.end()) {
701 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
702 tid);
703 activeThreads.erase(isActive);
704
705 removeThread(tid);
706 }
707*/
708}
709
710template <class Impl>
711void
712FullO3CPU<Impl>::serialize(std::ostream &os)
713{
714 SERIALIZE_ENUM(_status);
715 BaseCPU::serialize(os);
716 nameOut(os, csprintf("%s.tickEvent", name()));
717 tickEvent.serialize(os);
718
719 // Use SimpleThread's ability to checkpoint to make it easier to
720 // write out the registers. Also make this static so it doesn't
721 // get instantiated multiple times (causes a panic in statistics).
722 static SimpleThread temp;
723
724 for (int i = 0; i < thread.size(); i++) {
725 nameOut(os, csprintf("%s.xc.%i", name(), i));
726 temp.copyTC(thread[i]->getTC());
727 temp.serialize(os);
728 }
729}
730
731template <class Impl>
732void
733FullO3CPU<Impl>::unserialize(Checkpoint *cp, const std::string §ion)
734{
735 UNSERIALIZE_ENUM(_status);
736 BaseCPU::unserialize(cp, section);
737 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
738
739 // Use SimpleThread's ability to checkpoint to make it easier to
740 // read in the registers. Also make this static so it doesn't
741 // get instantiated multiple times (causes a panic in statistics).
742 static SimpleThread temp;
743
744 for (int i = 0; i < thread.size(); i++) {
745 temp.copyTC(thread[i]->getTC());
746 temp.unserialize(cp, csprintf("%s.xc.%i", section, i));
747 thread[i]->getTC()->copyArchRegs(temp.getTC());
748 }
749}
750
751template <class Impl>
752bool
753FullO3CPU<Impl>::drain(Event *drain_event)
754{
755 drainCount = 0;
756 fetch.drain();
757 decode.drain();
758 rename.drain();
759 iew.drain();
760 commit.drain();
761
762 // Wake the CPU and record activity so everything can drain out if
763 // the CPU was not able to immediately drain.
764 if (getState() != SimObject::DrainedTiming) {
765 // A bit of a hack...set the drainEvent after all the drain()
766 // calls have been made, that way if all of the stages drain
767 // immediately, the signalDrained() function knows not to call
768 // process on the drain event.
769 drainEvent = drain_event;
770
771 wakeCPU();
772 activityRec.activity();
773
774 return false;
775 } else {
776 return true;
777 }
778}
779
780template <class Impl>
781void
782FullO3CPU<Impl>::resume()
783{
784 fetch.resume();
785 decode.resume();
786 rename.resume();
787 iew.resume();
788 commit.resume();
789
790 if (_status == SwitchedOut || _status == Idle)
791 return;
792
793 if (!tickEvent.scheduled())
794 tickEvent.schedule(curTick);
795 _status = Running;
796}
797
798template <class Impl>
799void
800FullO3CPU<Impl>::signalDrained()
801{
802 if (++drainCount == NumStages) {
803 if (tickEvent.scheduled())
804 tickEvent.squash();
805
806 changeState(SimObject::DrainedTiming);
807
808 if (drainEvent) {
809 drainEvent->process();
810 drainEvent = NULL;
811 }
812 }
813 assert(drainCount <= 5);
814}
815
816template <class Impl>
817void
818FullO3CPU<Impl>::switchOut()
819{
820 fetch.switchOut();
821 rename.switchOut();
822 commit.switchOut();
823 instList.clear();
824 while (!removeList.empty()) {
825 removeList.pop();
826 }
827
828 _status = SwitchedOut;
829#if USE_CHECKER
830 if (checker)
831 checker->switchOut();
832#endif
833}
834
835template <class Impl>
836void
837FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
838{
839 // Flush out any old data from the time buffers.
840 for (int i = 0; i < 10; ++i) {
841 timeBuffer.advance();
842 fetchQueue.advance();
843 decodeQueue.advance();
844 renameQueue.advance();
845 iewQueue.advance();
846 }
847
848 activityRec.reset();
849
850 BaseCPU::takeOverFrom(oldCPU);
851
852 fetch.takeOverFrom();
853 decode.takeOverFrom();
854 rename.takeOverFrom();
855 iew.takeOverFrom();
856 commit.takeOverFrom();
857
858 assert(!tickEvent.scheduled());
859
860 // @todo: Figure out how to properly select the tid to put onto
861 // the active threads list.
862 int tid = 0;
863
864 list<unsigned>::iterator isActive = find(
865 activeThreads.begin(), activeThreads.end(), tid);
866
867 if (isActive == activeThreads.end()) {
868 //May Need to Re-code this if the delay variable is the delay
869 //needed for thread to activate
870 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n",
871 tid);
872
873 activeThreads.push_back(tid);
874 }
875
876 // Set all statuses to active, schedule the CPU's tick event.
877 // @todo: Fix up statuses so this is handled properly
878 for (int i = 0; i < threadContexts.size(); ++i) {
879 ThreadContext *tc = threadContexts[i];
880 if (tc->status() == ThreadContext::Active && _status != Running) {
881 _status = Running;
882 tickEvent.schedule(curTick);
883 }
884 }
885 if (!tickEvent.scheduled())
886 tickEvent.schedule(curTick);
887}
888
889template <class Impl>
890uint64_t
891FullO3CPU<Impl>::readIntReg(int reg_idx)
892{
893 return regFile.readIntReg(reg_idx);
894}
895
896template <class Impl>
897FloatReg
898FullO3CPU<Impl>::readFloatReg(int reg_idx, int width)
899{
900 return regFile.readFloatReg(reg_idx, width);
901}
902
903template <class Impl>
904FloatReg
905FullO3CPU<Impl>::readFloatReg(int reg_idx)
906{
907 return regFile.readFloatReg(reg_idx);
908}
909
910template <class Impl>
911FloatRegBits
912FullO3CPU<Impl>::readFloatRegBits(int reg_idx, int width)
913{
914 return regFile.readFloatRegBits(reg_idx, width);
915}
916
917template <class Impl>
918FloatRegBits
919FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
920{
921 return regFile.readFloatRegBits(reg_idx);
922}
923
924template <class Impl>
925void
926FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
927{
928 regFile.setIntReg(reg_idx, val);
929}
930
931template <class Impl>
932void
933FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
934{
935 regFile.setFloatReg(reg_idx, val, width);
936}
937
938template <class Impl>
939void
940FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
941{
942 regFile.setFloatReg(reg_idx, val);
943}
944
945template <class Impl>
946void
947FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val, int width)
948{
949 regFile.setFloatRegBits(reg_idx, val, width);
950}
951
952template <class Impl>
953void
954FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
955{
956 regFile.setFloatRegBits(reg_idx, val);
957}
958
959template <class Impl>
960uint64_t
961FullO3CPU<Impl>::readArchIntReg(int reg_idx, unsigned tid)
962{
963 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
964
965 return regFile.readIntReg(phys_reg);
966}
967
968template <class Impl>
969float
970FullO3CPU<Impl>::readArchFloatRegSingle(int reg_idx, unsigned tid)
971{
972 int idx = reg_idx + TheISA::FP_Base_DepTag;
973 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
974
975 return regFile.readFloatReg(phys_reg);
976}
977
978template <class Impl>
979double
980FullO3CPU<Impl>::readArchFloatRegDouble(int reg_idx, unsigned tid)
981{
982 int idx = reg_idx + TheISA::FP_Base_DepTag;
983 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
984
985 return regFile.readFloatReg(phys_reg, 64);
986}
987
988template <class Impl>
989uint64_t
990FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, unsigned tid)
991{
992 int idx = reg_idx + TheISA::FP_Base_DepTag;
993 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
994
995 return regFile.readFloatRegBits(phys_reg);
996}
997
998template <class Impl>
999void
1000FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, unsigned tid)
1001{
1002 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1003
1004 regFile.setIntReg(phys_reg, val);
1005}
1006
1007template <class Impl>
1008void
1009FullO3CPU<Impl>::setArchFloatRegSingle(int reg_idx, float val, unsigned tid)
1010{
1011 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1012
1013 regFile.setFloatReg(phys_reg, val);
1014}
1015
1016template <class Impl>
1017void
1018FullO3CPU<Impl>::setArchFloatRegDouble(int reg_idx, double val, unsigned tid)
1019{
1020 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1021
1022 regFile.setFloatReg(phys_reg, val, 64);
1023}
1024
1025template <class Impl>
1026void
1027FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, unsigned tid)
1028{
1029 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1030
1031 regFile.setFloatRegBits(phys_reg, val);
1032}
1033
1034template <class Impl>
1035uint64_t
1036FullO3CPU<Impl>::readPC(unsigned tid)
1037{
1038 return commit.readPC(tid);
1039}
1040
1041template <class Impl>
1042void
1043FullO3CPU<Impl>::setPC(Addr new_PC,unsigned tid)
1044{
1045 commit.setPC(new_PC, tid);
1046}
1047
1048template <class Impl>
1049uint64_t
1050FullO3CPU<Impl>::readNextPC(unsigned tid)
1051{
1052 return commit.readNextPC(tid);
1053}
1054
1055template <class Impl>
1056void
1057FullO3CPU<Impl>::setNextPC(uint64_t val,unsigned tid)
1058{
1059 commit.setNextPC(val, tid);
1060}
1061
1062#if THE_ISA != ALPHA_ISA
1063template <class Impl>
1064uint64_t
1065FullO3CPU<Impl>::readNextNPC(unsigned tid)
1066{
1067 return commit.readNextNPC(tid);
1068}
1069
1070template <class Impl>
1071void
1072FullO3CPU<Impl>::setNextNNPC(uint64_t val,unsigned tid)
1073{
1074 commit.setNextNPC(val, tid);
1075}
1076#endif
1077
1078template <class Impl>
1079typename FullO3CPU<Impl>::ListIt
1080FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1081{
1082 instList.push_back(inst);
1083
1084 return --(instList.end());
1085}
1086
1087template <class Impl>
1088void
1089FullO3CPU<Impl>::instDone(unsigned tid)
1090{
1091 // Keep an instruction count.
1092 thread[tid]->numInst++;
1093 thread[tid]->numInsts++;
1094 committedInsts[tid]++;
1095 totalCommittedInsts++;
1096
1097 // Check for instruction-count-based events.
1098 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1099}
1100
1101template <class Impl>
1102void
1103FullO3CPU<Impl>::addToRemoveList(DynInstPtr &inst)
1104{
1105 removeInstsThisCycle = true;
1106
1107 removeList.push(inst->getInstListIt());
1108}
1109
1110template <class Impl>
1111void
1112FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1113{
1114 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %#x "
1115 "[sn:%lli]\n",
1116 inst->threadNumber, inst->readPC(), inst->seqNum);
1117
1118 removeInstsThisCycle = true;
1119
1120 // Remove the front instruction.
1121 removeList.push(inst->getInstListIt());
1122}
1123
1124template <class Impl>
1125void
1126FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid)
1127{
1128 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1129 " list.\n", tid);
1130
1131 ListIt end_it;
1132
1133 bool rob_empty = false;
1134
1135 if (instList.empty()) {
1136 return;
1137 } else if (rob.isEmpty(/*tid*/)) {
1138 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1139 end_it = instList.begin();
1140 rob_empty = true;
1141 } else {
1142 end_it = (rob.readTailInst(tid))->getInstListIt();
1143 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1144 }
1145
1146 removeInstsThisCycle = true;
1147
1148 ListIt inst_it = instList.end();
1149
1150 inst_it--;
1151
1152 // Walk through the instruction list, removing any instructions
1153 // that were inserted after the given instruction iterator, end_it.
1154 while (inst_it != end_it) {
1155 assert(!instList.empty());
1156
1157 squashInstIt(inst_it, tid);
1158
1159 inst_it--;
1160 }
1161
1162 // If the ROB was empty, then we actually need to remove the first
1163 // instruction as well.
1164 if (rob_empty) {
1165 squashInstIt(inst_it, tid);
1166 }
1167}
1168
1169template <class Impl>
1170void
1171FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num,
1172 unsigned tid)
1173{
1174 assert(!instList.empty());
1175
1176 removeInstsThisCycle = true;
1177
1178 ListIt inst_iter = instList.end();
1179
1180 inst_iter--;
1181
1182 DPRINTF(O3CPU, "Deleting instructions from instruction "
1183 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1184 tid, seq_num, (*inst_iter)->seqNum);
1185
1186 while ((*inst_iter)->seqNum > seq_num) {
1187
1188 bool break_loop = (inst_iter == instList.begin());
1189
1190 squashInstIt(inst_iter, tid);
1191
1192 inst_iter--;
1193
1194 if (break_loop)
1195 break;
1196 }
1197}
1198
1199template <class Impl>
1200inline void
1201FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, const unsigned &tid)
1202{
1203 if ((*instIt)->threadNumber == tid) {
1204 DPRINTF(O3CPU, "Squashing instruction, "
1205 "[tid:%i] [sn:%lli] PC %#x\n",
1206 (*instIt)->threadNumber,
1207 (*instIt)->seqNum,
1208 (*instIt)->readPC());
1209
1210 // Mark it as squashed.
1211 (*instIt)->setSquashed();
1212
1213 // @todo: Formulate a consistent method for deleting
1214 // instructions from the instruction list
1215 // Remove the instruction from the list.
1216 removeList.push(instIt);
1217 }
1218}
1219
1220template <class Impl>
1221void
1222FullO3CPU<Impl>::cleanUpRemovedInsts()
1223{
1224 while (!removeList.empty()) {
1225 DPRINTF(O3CPU, "Removing instruction, "
1226 "[tid:%i] [sn:%lli] PC %#x\n",
1227 (*removeList.front())->threadNumber,
1228 (*removeList.front())->seqNum,
1229 (*removeList.front())->readPC());
1230
1231 instList.erase(removeList.front());
1232
1233 removeList.pop();
1234 }
1235
1236 removeInstsThisCycle = false;
1237}
1238/*
1239template <class Impl>
1240void
1241FullO3CPU<Impl>::removeAllInsts()
1242{
1243 instList.clear();
1244}
1245*/
1246template <class Impl>
1247void
1248FullO3CPU<Impl>::dumpInsts()
1249{
1250 int num = 0;
1251
1252 ListIt inst_list_it = instList.begin();
1253
1254 cprintf("Dumping Instruction List\n");
1255
1256 while (inst_list_it != instList.end()) {
1257 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1258 "Squashed:%i\n\n",
1259 num, (*inst_list_it)->readPC(), (*inst_list_it)->threadNumber,
1260 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1261 (*inst_list_it)->isSquashed());
1262 inst_list_it++;
1263 ++num;
1264 }
1265}
1266/*
1267template <class Impl>
1268void
1269FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1270{
1271 iew.wakeDependents(inst);
1272}
1273*/
1274template <class Impl>
1275void
1276FullO3CPU<Impl>::wakeCPU()
1277{
1278 if (activityRec.active() || tickEvent.scheduled()) {
1279 DPRINTF(Activity, "CPU already running.\n");
1280 return;
1281 }
1282
1283 DPRINTF(Activity, "Waking up CPU\n");
1284
1285 idleCycles += (curTick - 1) - lastRunningCycle;
1286
1287 tickEvent.schedule(curTick);
1288}
1289
1290template <class Impl>
1291int
1292FullO3CPU<Impl>::getFreeTid()
1293{
1294 for (int i=0; i < numThreads; i++) {
1295 if (!tids[i]) {
1296 tids[i] = true;
1297 return i;
1298 }
1299 }
1300
1301 return -1;
1302}
1303
1304template <class Impl>
1305void
1306FullO3CPU<Impl>::doContextSwitch()
1307{
1308 if (contextSwitch) {
1309
1310 //ADD CODE TO DEACTIVE THREAD HERE (???)
1311
1312 for (int tid=0; tid < cpuWaitList.size(); tid++) {
1313 activateWhenReady(tid);
1314 }
1315
1316 if (cpuWaitList.size() == 0)
1317 contextSwitch = true;
1318 }
1319}
1320
1321template <class Impl>
1322void
1323FullO3CPU<Impl>::updateThreadPriority()
1324{
1325 if (activeThreads.size() > 1)
1326 {
1327 //DEFAULT TO ROUND ROBIN SCHEME
1328 //e.g. Move highest priority to end of thread list
1329 list<unsigned>::iterator list_begin = activeThreads.begin();
1330 list<unsigned>::iterator list_end = activeThreads.end();
1331
1332 unsigned high_thread = *list_begin;
1333
1334 activeThreads.erase(list_begin);
1335
1336 activeThreads.push_back(high_thread);
1337 }
1338}
1339
1340// Forward declaration of FullO3CPU.
1341template class FullO3CPU<O3CPUImpl>;
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Kevin Lim
29 * Korey Sewell
30 */
31
32#include "config/full_system.hh"
33#include "config/use_checker.hh"
34
35#if FULL_SYSTEM
36#include "sim/system.hh"
37#else
38#include "sim/process.hh"
39#endif
40
41#include "cpu/activity.hh"
42#include "cpu/simple_thread.hh"
43#include "cpu/thread_context.hh"
44#include "cpu/o3/isa_specific.hh"
45#include "cpu/o3/cpu.hh"
46
47#include "sim/root.hh"
48#include "sim/stat_control.hh"
49
50#if USE_CHECKER
51#include "cpu/checker/cpu.hh"
52#endif
53
54using namespace std;
55using namespace TheISA;
56
57BaseO3CPU::BaseO3CPU(Params *params)
58 : BaseCPU(params), cpu_id(0)
59{
60}
61
62void
63BaseO3CPU::regStats()
64{
65 BaseCPU::regStats();
66}
67
68template <class Impl>
69FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
70 : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c)
71{
72}
73
74template <class Impl>
75void
76FullO3CPU<Impl>::TickEvent::process()
77{
78 cpu->tick();
79}
80
81template <class Impl>
82const char *
83FullO3CPU<Impl>::TickEvent::description()
84{
85 return "FullO3CPU tick event";
86}
87
88template <class Impl>
89FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent()
90 : Event(&mainEventQueue, CPU_Tick_Pri)
91{
92}
93
94template <class Impl>
95void
96FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num,
97 FullO3CPU<Impl> *thread_cpu)
98{
99 tid = thread_num;
100 cpu = thread_cpu;
101}
102
103template <class Impl>
104void
105FullO3CPU<Impl>::ActivateThreadEvent::process()
106{
107 cpu->activateThread(tid);
108}
109
110template <class Impl>
111const char *
112FullO3CPU<Impl>::ActivateThreadEvent::description()
113{
114 return "FullO3CPU \"Activate Thread\" event";
115}
116
117template <class Impl>
118FullO3CPU<Impl>::FullO3CPU(Params *params)
119 : BaseO3CPU(params),
120 tickEvent(this),
121 removeInstsThisCycle(false),
122 fetch(params),
123 decode(params),
124 rename(params),
125 iew(params),
126 commit(params),
127
128 regFile(params->numPhysIntRegs, params->numPhysFloatRegs),
129
130 freeList(params->numberOfThreads,
131 TheISA::NumIntRegs, params->numPhysIntRegs,
132 TheISA::NumFloatRegs, params->numPhysFloatRegs),
133
134 rob(params->numROBEntries, params->squashWidth,
135 params->smtROBPolicy, params->smtROBThreshold,
136 params->numberOfThreads),
137
138 scoreboard(params->numberOfThreads,
139 TheISA::NumIntRegs, params->numPhysIntRegs,
140 TheISA::NumFloatRegs, params->numPhysFloatRegs,
141 TheISA::NumMiscRegs * number_of_threads,
142 TheISA::ZeroReg),
143
144 // For now just have these time buffers be pretty big.
145 // @todo: Make these time buffer sizes parameters or derived
146 // from latencies
147 timeBuffer(5, 5),
148 fetchQueue(5, 5),
149 decodeQueue(5, 5),
150 renameQueue(5, 5),
151 iewQueue(5, 5),
152 activityRec(NumStages, 10, params->activity),
153
154 globalSeqNum(1),
155
156#if FULL_SYSTEM
157 system(params->system),
158 physmem(system->physmem),
159#endif // FULL_SYSTEM
160 mem(params->mem),
161 drainCount(0),
162 deferRegistration(params->deferRegistration),
163 numThreads(number_of_threads)
164{
165 _status = Idle;
166
167 checker = NULL;
168
169 if (params->checker) {
170#if USE_CHECKER
171 BaseCPU *temp_checker = params->checker;
172 checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker);
173 checker->setMemory(mem);
174#if FULL_SYSTEM
175 checker->setSystem(params->system);
176#endif
177#else
178 panic("Checker enabled but not compiled in!");
179#endif // USE_CHECKER
180 }
181
182#if !FULL_SYSTEM
183 thread.resize(number_of_threads);
184 tids.resize(number_of_threads);
185#endif
186
187 // The stages also need their CPU pointer setup. However this
188 // must be done at the upper level CPU because they have pointers
189 // to the upper level CPU, and not this FullO3CPU.
190
191 // Set up Pointers to the activeThreads list for each stage
192 fetch.setActiveThreads(&activeThreads);
193 decode.setActiveThreads(&activeThreads);
194 rename.setActiveThreads(&activeThreads);
195 iew.setActiveThreads(&activeThreads);
196 commit.setActiveThreads(&activeThreads);
197
198 // Give each of the stages the time buffer they will use.
199 fetch.setTimeBuffer(&timeBuffer);
200 decode.setTimeBuffer(&timeBuffer);
201 rename.setTimeBuffer(&timeBuffer);
202 iew.setTimeBuffer(&timeBuffer);
203 commit.setTimeBuffer(&timeBuffer);
204
205 // Also setup each of the stages' queues.
206 fetch.setFetchQueue(&fetchQueue);
207 decode.setFetchQueue(&fetchQueue);
208 commit.setFetchQueue(&fetchQueue);
209 decode.setDecodeQueue(&decodeQueue);
210 rename.setDecodeQueue(&decodeQueue);
211 rename.setRenameQueue(&renameQueue);
212 iew.setRenameQueue(&renameQueue);
213 iew.setIEWQueue(&iewQueue);
214 commit.setIEWQueue(&iewQueue);
215 commit.setRenameQueue(&renameQueue);
216
217 commit.setFetchStage(&fetch);
218 commit.setIEWStage(&iew);
219 rename.setIEWStage(&iew);
220 rename.setCommitStage(&commit);
221
222#if !FULL_SYSTEM
223 int active_threads = params->workload.size();
224
225 if (active_threads > Impl::MaxThreads) {
226 panic("Workload Size too large. Increase the 'MaxThreads'"
227 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) or "
228 "edit your workload size.");
229 }
230#else
231 int active_threads = 1;
232#endif
233
234 //Make Sure That this a Valid Architeture
235 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs);
236 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs);
237
238 rename.setScoreboard(&scoreboard);
239 iew.setScoreboard(&scoreboard);
240
241 // Setup the rename map for whichever stages need it.
242 PhysRegIndex lreg_idx = 0;
243 PhysRegIndex freg_idx = params->numPhysIntRegs; //Index to 1 after int regs
244
245 for (int tid=0; tid < numThreads; tid++) {
246 bool bindRegs = (tid <= active_threads - 1);
247
248 commitRenameMap[tid].init(TheISA::NumIntRegs,
249 params->numPhysIntRegs,
250 lreg_idx, //Index for Logical. Regs
251
252 TheISA::NumFloatRegs,
253 params->numPhysFloatRegs,
254 freg_idx, //Index for Float Regs
255
256 TheISA::NumMiscRegs,
257
258 TheISA::ZeroReg,
259 TheISA::ZeroReg,
260
261 tid,
262 false);
263
264 renameMap[tid].init(TheISA::NumIntRegs,
265 params->numPhysIntRegs,
266 lreg_idx, //Index for Logical. Regs
267
268 TheISA::NumFloatRegs,
269 params->numPhysFloatRegs,
270 freg_idx, //Index for Float Regs
271
272 TheISA::NumMiscRegs,
273
274 TheISA::ZeroReg,
275 TheISA::ZeroReg,
276
277 tid,
278 bindRegs);
279 }
280
281 rename.setRenameMap(renameMap);
282 commit.setRenameMap(commitRenameMap);
283
284 // Give renameMap & rename stage access to the freeList;
285 for (int i=0; i < numThreads; i++) {
286 renameMap[i].setFreeList(&freeList);
287 }
288 rename.setFreeList(&freeList);
289
290 // Setup the ROB for whichever stages need it.
291 commit.setROB(&rob);
292
293 lastRunningCycle = curTick;
294
295 lastActivatedCycle = -1;
296
297 contextSwitch = false;
298}
299
300template <class Impl>
301FullO3CPU<Impl>::~FullO3CPU()
302{
303}
304
305template <class Impl>
306void
307FullO3CPU<Impl>::fullCPURegStats()
308{
309 BaseO3CPU::regStats();
310
311 // Register any of the O3CPU's stats here.
312 timesIdled
313 .name(name() + ".timesIdled")
314 .desc("Number of times that the entire CPU went into an idle state and"
315 " unscheduled itself")
316 .prereq(timesIdled);
317
318 idleCycles
319 .name(name() + ".idleCycles")
320 .desc("Total number of cycles that the CPU has spent unscheduled due "
321 "to idling")
322 .prereq(idleCycles);
323
324 // Number of Instructions simulated
325 // --------------------------------
326 // Should probably be in Base CPU but need templated
327 // MaxThreads so put in here instead
328 committedInsts
329 .init(numThreads)
330 .name(name() + ".committedInsts")
331 .desc("Number of Instructions Simulated");
332
333 totalCommittedInsts
334 .name(name() + ".committedInsts_total")
335 .desc("Number of Instructions Simulated");
336
337 cpi
338 .name(name() + ".cpi")
339 .desc("CPI: Cycles Per Instruction")
340 .precision(6);
341 cpi = simTicks / committedInsts;
342
343 totalCpi
344 .name(name() + ".cpi_total")
345 .desc("CPI: Total CPI of All Threads")
346 .precision(6);
347 totalCpi = simTicks / totalCommittedInsts;
348
349 ipc
350 .name(name() + ".ipc")
351 .desc("IPC: Instructions Per Cycle")
352 .precision(6);
353 ipc = committedInsts / simTicks;
354
355 totalIpc
356 .name(name() + ".ipc_total")
357 .desc("IPC: Total IPC of All Threads")
358 .precision(6);
359 totalIpc = totalCommittedInsts / simTicks;
360
361}
362
363template <class Impl>
364void
365FullO3CPU<Impl>::tick()
366{
367 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n");
368
369 ++numCycles;
370
371// activity = false;
372
373 //Tick each of the stages
374 fetch.tick();
375
376 decode.tick();
377
378 rename.tick();
379
380 iew.tick();
381
382 commit.tick();
383
384#if !FULL_SYSTEM
385 doContextSwitch();
386#endif
387
388 // Now advance the time buffers
389 timeBuffer.advance();
390
391 fetchQueue.advance();
392 decodeQueue.advance();
393 renameQueue.advance();
394 iewQueue.advance();
395
396 activityRec.advance();
397
398 if (removeInstsThisCycle) {
399 cleanUpRemovedInsts();
400 }
401
402 if (!tickEvent.scheduled()) {
403 if (_status == SwitchedOut) {
404 // increment stat
405 lastRunningCycle = curTick;
406 } else if (!activityRec.active()) {
407 lastRunningCycle = curTick;
408 timesIdled++;
409 } else {
410 tickEvent.schedule(curTick + cycles(1));
411 }
412 }
413
414#if !FULL_SYSTEM
415 updateThreadPriority();
416#endif
417
418}
419
420template <class Impl>
421void
422FullO3CPU<Impl>::init()
423{
424 if (!deferRegistration) {
425 registerThreadContexts();
426 }
427
428 // Set inSyscall so that the CPU doesn't squash when initially
429 // setting up registers.
430 for (int i = 0; i < number_of_threads; ++i)
431 thread[i]->inSyscall = true;
432
433 for (int tid=0; tid < number_of_threads; tid++) {
434#if FULL_SYSTEM
435 ThreadContext *src_tc = threadContexts[tid];
436#else
437 ThreadContext *src_tc = thread[tid]->getTC();
438#endif
439 // Threads start in the Suspended State
440 if (src_tc->status() != ThreadContext::Suspended) {
441 continue;
442 }
443
444#if FULL_SYSTEM
445 TheISA::initCPU(src_tc, src_tc->readCpuId());
446#endif
447 }
448
449 // Clear inSyscall.
450 for (int i = 0; i < number_of_threads; ++i)
451 thread[i]->inSyscall = false;
452
453 // Initialize stages.
454 fetch.initStage();
455 iew.initStage();
456 rename.initStage();
457 commit.initStage();
458
459 commit.setThreads(thread);
460}
461
462template <class Impl>
463void
464FullO3CPU<Impl>::insertThread(unsigned tid)
465{
466 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU");
467 // Will change now that the PC and thread state is internal to the CPU
468 // and not in the ThreadContext.
469#if FULL_SYSTEM
470 ThreadContext *src_tc = system->threadContexts[tid];
471#else
472 ThreadContext *src_tc = tcBase(tid);
473#endif
474
475 //Bind Int Regs to Rename Map
476 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
477 PhysRegIndex phys_reg = freeList.getIntReg();
478
479 renameMap[tid].setEntry(ireg,phys_reg);
480 scoreboard.setReg(phys_reg);
481 }
482
483 //Bind Float Regs to Rename Map
484 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
485 PhysRegIndex phys_reg = freeList.getFloatReg();
486
487 renameMap[tid].setEntry(freg,phys_reg);
488 scoreboard.setReg(phys_reg);
489 }
490
491 //Copy Thread Data Into RegFile
492 //this->copyFromTC(tid);
493
494 //Set PC/NPC/NNPC
495 setPC(src_tc->readPC(), tid);
496 setNextPC(src_tc->readNextPC(), tid);
497#if THE_ISA != ALPHA_ISA
498 setNextNPC(src_tc->readNextNPC(), tid);
499#endif
500
501 src_tc->setStatus(ThreadContext::Active);
502
503 activateContext(tid,1);
504
505 //Reset ROB/IQ/LSQ Entries
506 commit.rob->resetEntries();
507 iew.resetEntries();
508}
509
510template <class Impl>
511void
512FullO3CPU<Impl>::removeThread(unsigned tid)
513{
514 DPRINTF(O3CPU,"[tid:%i] Removing thread from CPU.");
515
516 // Copy Thread Data From RegFile
517 // If thread is suspended, it might be re-allocated
518 //this->copyToTC(tid);
519
520 // Unbind Int Regs from Rename Map
521 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
522 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
523
524 scoreboard.unsetReg(phys_reg);
525 freeList.addReg(phys_reg);
526 }
527
528 // Unbind Float Regs from Rename Map
529 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
530 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
531
532 scoreboard.unsetReg(phys_reg);
533 freeList.addReg(phys_reg);
534 }
535
536 // Squash Throughout Pipeline
537 fetch.squash(0,tid);
538 decode.squash(tid);
539 rename.squash(tid);
540
541 assert(iew.ldstQueue.getCount(tid) == 0);
542
543 // Reset ROB/IQ/LSQ Entries
544 if (activeThreads.size() >= 1) {
545 commit.rob->resetEntries();
546 iew.resetEntries();
547 }
548}
549
550
551template <class Impl>
552void
553FullO3CPU<Impl>::activateWhenReady(int tid)
554{
555 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming"
556 "(e.g. PhysRegs/ROB/IQ/LSQ) \n",
557 tid);
558
559 bool ready = true;
560
561 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) {
562 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
563 "Phys. Int. Regs.\n",
564 tid);
565 ready = false;
566 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) {
567 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
568 "Phys. Float. Regs.\n",
569 tid);
570 ready = false;
571 } else if (commit.rob->numFreeEntries() >=
572 commit.rob->entryAmount(activeThreads.size() + 1)) {
573 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
574 "ROB entries.\n",
575 tid);
576 ready = false;
577 } else if (iew.instQueue.numFreeEntries() >=
578 iew.instQueue.entryAmount(activeThreads.size() + 1)) {
579 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
580 "IQ entries.\n",
581 tid);
582 ready = false;
583 } else if (iew.ldstQueue.numFreeEntries() >=
584 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) {
585 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
586 "LSQ entries.\n",
587 tid);
588 ready = false;
589 }
590
591 if (ready) {
592 insertThread(tid);
593
594 contextSwitch = false;
595
596 cpuWaitList.remove(tid);
597 } else {
598 suspendContext(tid);
599
600 //blocks fetch
601 contextSwitch = true;
602
603 //do waitlist
604 cpuWaitList.push_back(tid);
605 }
606}
607
608template <class Impl>
609void
610FullO3CPU<Impl>::activateThread(unsigned int tid)
611{
612 list<unsigned>::iterator isActive = find(
613 activeThreads.begin(), activeThreads.end(), tid);
614
615 if (isActive == activeThreads.end()) {
616 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
617 tid);
618
619 activeThreads.push_back(tid);
620 }
621}
622
623
624template <class Impl>
625void
626FullO3CPU<Impl>::activateContext(int tid, int delay)
627{
628 // Needs to set each stage to running as well.
629 if (delay){
630 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate "
631 "on cycle %d\n", tid, curTick + cycles(delay));
632 scheduleActivateThreadEvent(tid, delay);
633 } else {
634 activateThread(tid);
635 }
636
637 if(lastActivatedCycle < curTick) {
638 scheduleTickEvent(delay);
639
640 // Be sure to signal that there's some activity so the CPU doesn't
641 // deschedule itself.
642 activityRec.activity();
643 fetch.wakeFromQuiesce();
644
645 lastActivatedCycle = curTick;
646
647 _status = Running;
648 }
649}
650
651template <class Impl>
652void
653FullO3CPU<Impl>::suspendContext(int tid)
654{
655 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid);
656 unscheduleTickEvent();
657 _status = Idle;
658/*
659 //Remove From Active List, if Active
660 list<unsigned>::iterator isActive = find(
661 activeThreads.begin(), activeThreads.end(), tid);
662
663 if (isActive != activeThreads.end()) {
664 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
665 tid);
666 activeThreads.erase(isActive);
667 }
668*/
669}
670
671template <class Impl>
672void
673FullO3CPU<Impl>::deallocateContext(int tid)
674{
675 DPRINTF(O3CPU,"[tid:%i]: Deallocating Thread Context", tid);
676
677 //Remove From Active List, if Active
678 list<unsigned>::iterator thread_it =
679 find(activeThreads.begin(), activeThreads.end(), tid);
680
681 if (thread_it != activeThreads.end()) {
682 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
683 tid);
684 activeThreads.erase(thread_it);
685
686 removeThread(tid);
687 }
688}
689
690template <class Impl>
691void
692FullO3CPU<Impl>::haltContext(int tid)
693{
694 DPRINTF(O3CPU,"[tid:%i]: Halting Thread Context", tid);
695/*
696 //Remove From Active List, if Active
697 list<unsigned>::iterator isActive = find(
698 activeThreads.begin(), activeThreads.end(), tid);
699
700 if (isActive != activeThreads.end()) {
701 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
702 tid);
703 activeThreads.erase(isActive);
704
705 removeThread(tid);
706 }
707*/
708}
709
710template <class Impl>
711void
712FullO3CPU<Impl>::serialize(std::ostream &os)
713{
714 SERIALIZE_ENUM(_status);
715 BaseCPU::serialize(os);
716 nameOut(os, csprintf("%s.tickEvent", name()));
717 tickEvent.serialize(os);
718
719 // Use SimpleThread's ability to checkpoint to make it easier to
720 // write out the registers. Also make this static so it doesn't
721 // get instantiated multiple times (causes a panic in statistics).
722 static SimpleThread temp;
723
724 for (int i = 0; i < thread.size(); i++) {
725 nameOut(os, csprintf("%s.xc.%i", name(), i));
726 temp.copyTC(thread[i]->getTC());
727 temp.serialize(os);
728 }
729}
730
731template <class Impl>
732void
733FullO3CPU<Impl>::unserialize(Checkpoint *cp, const std::string §ion)
734{
735 UNSERIALIZE_ENUM(_status);
736 BaseCPU::unserialize(cp, section);
737 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
738
739 // Use SimpleThread's ability to checkpoint to make it easier to
740 // read in the registers. Also make this static so it doesn't
741 // get instantiated multiple times (causes a panic in statistics).
742 static SimpleThread temp;
743
744 for (int i = 0; i < thread.size(); i++) {
745 temp.copyTC(thread[i]->getTC());
746 temp.unserialize(cp, csprintf("%s.xc.%i", section, i));
747 thread[i]->getTC()->copyArchRegs(temp.getTC());
748 }
749}
750
751template <class Impl>
752bool
753FullO3CPU<Impl>::drain(Event *drain_event)
754{
755 drainCount = 0;
756 fetch.drain();
757 decode.drain();
758 rename.drain();
759 iew.drain();
760 commit.drain();
761
762 // Wake the CPU and record activity so everything can drain out if
763 // the CPU was not able to immediately drain.
764 if (getState() != SimObject::DrainedTiming) {
765 // A bit of a hack...set the drainEvent after all the drain()
766 // calls have been made, that way if all of the stages drain
767 // immediately, the signalDrained() function knows not to call
768 // process on the drain event.
769 drainEvent = drain_event;
770
771 wakeCPU();
772 activityRec.activity();
773
774 return false;
775 } else {
776 return true;
777 }
778}
779
780template <class Impl>
781void
782FullO3CPU<Impl>::resume()
783{
784 fetch.resume();
785 decode.resume();
786 rename.resume();
787 iew.resume();
788 commit.resume();
789
790 if (_status == SwitchedOut || _status == Idle)
791 return;
792
793 if (!tickEvent.scheduled())
794 tickEvent.schedule(curTick);
795 _status = Running;
796}
797
798template <class Impl>
799void
800FullO3CPU<Impl>::signalDrained()
801{
802 if (++drainCount == NumStages) {
803 if (tickEvent.scheduled())
804 tickEvent.squash();
805
806 changeState(SimObject::DrainedTiming);
807
808 if (drainEvent) {
809 drainEvent->process();
810 drainEvent = NULL;
811 }
812 }
813 assert(drainCount <= 5);
814}
815
816template <class Impl>
817void
818FullO3CPU<Impl>::switchOut()
819{
820 fetch.switchOut();
821 rename.switchOut();
822 commit.switchOut();
823 instList.clear();
824 while (!removeList.empty()) {
825 removeList.pop();
826 }
827
828 _status = SwitchedOut;
829#if USE_CHECKER
830 if (checker)
831 checker->switchOut();
832#endif
833}
834
835template <class Impl>
836void
837FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
838{
839 // Flush out any old data from the time buffers.
840 for (int i = 0; i < 10; ++i) {
841 timeBuffer.advance();
842 fetchQueue.advance();
843 decodeQueue.advance();
844 renameQueue.advance();
845 iewQueue.advance();
846 }
847
848 activityRec.reset();
849
850 BaseCPU::takeOverFrom(oldCPU);
851
852 fetch.takeOverFrom();
853 decode.takeOverFrom();
854 rename.takeOverFrom();
855 iew.takeOverFrom();
856 commit.takeOverFrom();
857
858 assert(!tickEvent.scheduled());
859
860 // @todo: Figure out how to properly select the tid to put onto
861 // the active threads list.
862 int tid = 0;
863
864 list<unsigned>::iterator isActive = find(
865 activeThreads.begin(), activeThreads.end(), tid);
866
867 if (isActive == activeThreads.end()) {
868 //May Need to Re-code this if the delay variable is the delay
869 //needed for thread to activate
870 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n",
871 tid);
872
873 activeThreads.push_back(tid);
874 }
875
876 // Set all statuses to active, schedule the CPU's tick event.
877 // @todo: Fix up statuses so this is handled properly
878 for (int i = 0; i < threadContexts.size(); ++i) {
879 ThreadContext *tc = threadContexts[i];
880 if (tc->status() == ThreadContext::Active && _status != Running) {
881 _status = Running;
882 tickEvent.schedule(curTick);
883 }
884 }
885 if (!tickEvent.scheduled())
886 tickEvent.schedule(curTick);
887}
888
889template <class Impl>
890uint64_t
891FullO3CPU<Impl>::readIntReg(int reg_idx)
892{
893 return regFile.readIntReg(reg_idx);
894}
895
896template <class Impl>
897FloatReg
898FullO3CPU<Impl>::readFloatReg(int reg_idx, int width)
899{
900 return regFile.readFloatReg(reg_idx, width);
901}
902
903template <class Impl>
904FloatReg
905FullO3CPU<Impl>::readFloatReg(int reg_idx)
906{
907 return regFile.readFloatReg(reg_idx);
908}
909
910template <class Impl>
911FloatRegBits
912FullO3CPU<Impl>::readFloatRegBits(int reg_idx, int width)
913{
914 return regFile.readFloatRegBits(reg_idx, width);
915}
916
917template <class Impl>
918FloatRegBits
919FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
920{
921 return regFile.readFloatRegBits(reg_idx);
922}
923
924template <class Impl>
925void
926FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
927{
928 regFile.setIntReg(reg_idx, val);
929}
930
931template <class Impl>
932void
933FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
934{
935 regFile.setFloatReg(reg_idx, val, width);
936}
937
938template <class Impl>
939void
940FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
941{
942 regFile.setFloatReg(reg_idx, val);
943}
944
945template <class Impl>
946void
947FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val, int width)
948{
949 regFile.setFloatRegBits(reg_idx, val, width);
950}
951
952template <class Impl>
953void
954FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
955{
956 regFile.setFloatRegBits(reg_idx, val);
957}
958
959template <class Impl>
960uint64_t
961FullO3CPU<Impl>::readArchIntReg(int reg_idx, unsigned tid)
962{
963 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
964
965 return regFile.readIntReg(phys_reg);
966}
967
968template <class Impl>
969float
970FullO3CPU<Impl>::readArchFloatRegSingle(int reg_idx, unsigned tid)
971{
972 int idx = reg_idx + TheISA::FP_Base_DepTag;
973 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
974
975 return regFile.readFloatReg(phys_reg);
976}
977
978template <class Impl>
979double
980FullO3CPU<Impl>::readArchFloatRegDouble(int reg_idx, unsigned tid)
981{
982 int idx = reg_idx + TheISA::FP_Base_DepTag;
983 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
984
985 return regFile.readFloatReg(phys_reg, 64);
986}
987
988template <class Impl>
989uint64_t
990FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, unsigned tid)
991{
992 int idx = reg_idx + TheISA::FP_Base_DepTag;
993 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
994
995 return regFile.readFloatRegBits(phys_reg);
996}
997
998template <class Impl>
999void
1000FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, unsigned tid)
1001{
1002 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1003
1004 regFile.setIntReg(phys_reg, val);
1005}
1006
1007template <class Impl>
1008void
1009FullO3CPU<Impl>::setArchFloatRegSingle(int reg_idx, float val, unsigned tid)
1010{
1011 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1012
1013 regFile.setFloatReg(phys_reg, val);
1014}
1015
1016template <class Impl>
1017void
1018FullO3CPU<Impl>::setArchFloatRegDouble(int reg_idx, double val, unsigned tid)
1019{
1020 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1021
1022 regFile.setFloatReg(phys_reg, val, 64);
1023}
1024
1025template <class Impl>
1026void
1027FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, unsigned tid)
1028{
1029 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
1030
1031 regFile.setFloatRegBits(phys_reg, val);
1032}
1033
1034template <class Impl>
1035uint64_t
1036FullO3CPU<Impl>::readPC(unsigned tid)
1037{
1038 return commit.readPC(tid);
1039}
1040
1041template <class Impl>
1042void
1043FullO3CPU<Impl>::setPC(Addr new_PC,unsigned tid)
1044{
1045 commit.setPC(new_PC, tid);
1046}
1047
1048template <class Impl>
1049uint64_t
1050FullO3CPU<Impl>::readNextPC(unsigned tid)
1051{
1052 return commit.readNextPC(tid);
1053}
1054
1055template <class Impl>
1056void
1057FullO3CPU<Impl>::setNextPC(uint64_t val,unsigned tid)
1058{
1059 commit.setNextPC(val, tid);
1060}
1061
1062#if THE_ISA != ALPHA_ISA
1063template <class Impl>
1064uint64_t
1065FullO3CPU<Impl>::readNextNPC(unsigned tid)
1066{
1067 return commit.readNextNPC(tid);
1068}
1069
1070template <class Impl>
1071void
1072FullO3CPU<Impl>::setNextNNPC(uint64_t val,unsigned tid)
1073{
1074 commit.setNextNPC(val, tid);
1075}
1076#endif
1077
1078template <class Impl>
1079typename FullO3CPU<Impl>::ListIt
1080FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1081{
1082 instList.push_back(inst);
1083
1084 return --(instList.end());
1085}
1086
1087template <class Impl>
1088void
1089FullO3CPU<Impl>::instDone(unsigned tid)
1090{
1091 // Keep an instruction count.
1092 thread[tid]->numInst++;
1093 thread[tid]->numInsts++;
1094 committedInsts[tid]++;
1095 totalCommittedInsts++;
1096
1097 // Check for instruction-count-based events.
1098 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1099}
1100
1101template <class Impl>
1102void
1103FullO3CPU<Impl>::addToRemoveList(DynInstPtr &inst)
1104{
1105 removeInstsThisCycle = true;
1106
1107 removeList.push(inst->getInstListIt());
1108}
1109
1110template <class Impl>
1111void
1112FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1113{
1114 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %#x "
1115 "[sn:%lli]\n",
1116 inst->threadNumber, inst->readPC(), inst->seqNum);
1117
1118 removeInstsThisCycle = true;
1119
1120 // Remove the front instruction.
1121 removeList.push(inst->getInstListIt());
1122}
1123
1124template <class Impl>
1125void
1126FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid)
1127{
1128 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1129 " list.\n", tid);
1130
1131 ListIt end_it;
1132
1133 bool rob_empty = false;
1134
1135 if (instList.empty()) {
1136 return;
1137 } else if (rob.isEmpty(/*tid*/)) {
1138 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1139 end_it = instList.begin();
1140 rob_empty = true;
1141 } else {
1142 end_it = (rob.readTailInst(tid))->getInstListIt();
1143 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1144 }
1145
1146 removeInstsThisCycle = true;
1147
1148 ListIt inst_it = instList.end();
1149
1150 inst_it--;
1151
1152 // Walk through the instruction list, removing any instructions
1153 // that were inserted after the given instruction iterator, end_it.
1154 while (inst_it != end_it) {
1155 assert(!instList.empty());
1156
1157 squashInstIt(inst_it, tid);
1158
1159 inst_it--;
1160 }
1161
1162 // If the ROB was empty, then we actually need to remove the first
1163 // instruction as well.
1164 if (rob_empty) {
1165 squashInstIt(inst_it, tid);
1166 }
1167}
1168
1169template <class Impl>
1170void
1171FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num,
1172 unsigned tid)
1173{
1174 assert(!instList.empty());
1175
1176 removeInstsThisCycle = true;
1177
1178 ListIt inst_iter = instList.end();
1179
1180 inst_iter--;
1181
1182 DPRINTF(O3CPU, "Deleting instructions from instruction "
1183 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1184 tid, seq_num, (*inst_iter)->seqNum);
1185
1186 while ((*inst_iter)->seqNum > seq_num) {
1187
1188 bool break_loop = (inst_iter == instList.begin());
1189
1190 squashInstIt(inst_iter, tid);
1191
1192 inst_iter--;
1193
1194 if (break_loop)
1195 break;
1196 }
1197}
1198
1199template <class Impl>
1200inline void
1201FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, const unsigned &tid)
1202{
1203 if ((*instIt)->threadNumber == tid) {
1204 DPRINTF(O3CPU, "Squashing instruction, "
1205 "[tid:%i] [sn:%lli] PC %#x\n",
1206 (*instIt)->threadNumber,
1207 (*instIt)->seqNum,
1208 (*instIt)->readPC());
1209
1210 // Mark it as squashed.
1211 (*instIt)->setSquashed();
1212
1213 // @todo: Formulate a consistent method for deleting
1214 // instructions from the instruction list
1215 // Remove the instruction from the list.
1216 removeList.push(instIt);
1217 }
1218}
1219
1220template <class Impl>
1221void
1222FullO3CPU<Impl>::cleanUpRemovedInsts()
1223{
1224 while (!removeList.empty()) {
1225 DPRINTF(O3CPU, "Removing instruction, "
1226 "[tid:%i] [sn:%lli] PC %#x\n",
1227 (*removeList.front())->threadNumber,
1228 (*removeList.front())->seqNum,
1229 (*removeList.front())->readPC());
1230
1231 instList.erase(removeList.front());
1232
1233 removeList.pop();
1234 }
1235
1236 removeInstsThisCycle = false;
1237}
1238/*
1239template <class Impl>
1240void
1241FullO3CPU<Impl>::removeAllInsts()
1242{
1243 instList.clear();
1244}
1245*/
1246template <class Impl>
1247void
1248FullO3CPU<Impl>::dumpInsts()
1249{
1250 int num = 0;
1251
1252 ListIt inst_list_it = instList.begin();
1253
1254 cprintf("Dumping Instruction List\n");
1255
1256 while (inst_list_it != instList.end()) {
1257 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1258 "Squashed:%i\n\n",
1259 num, (*inst_list_it)->readPC(), (*inst_list_it)->threadNumber,
1260 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1261 (*inst_list_it)->isSquashed());
1262 inst_list_it++;
1263 ++num;
1264 }
1265}
1266/*
1267template <class Impl>
1268void
1269FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1270{
1271 iew.wakeDependents(inst);
1272}
1273*/
1274template <class Impl>
1275void
1276FullO3CPU<Impl>::wakeCPU()
1277{
1278 if (activityRec.active() || tickEvent.scheduled()) {
1279 DPRINTF(Activity, "CPU already running.\n");
1280 return;
1281 }
1282
1283 DPRINTF(Activity, "Waking up CPU\n");
1284
1285 idleCycles += (curTick - 1) - lastRunningCycle;
1286
1287 tickEvent.schedule(curTick);
1288}
1289
1290template <class Impl>
1291int
1292FullO3CPU<Impl>::getFreeTid()
1293{
1294 for (int i=0; i < numThreads; i++) {
1295 if (!tids[i]) {
1296 tids[i] = true;
1297 return i;
1298 }
1299 }
1300
1301 return -1;
1302}
1303
1304template <class Impl>
1305void
1306FullO3CPU<Impl>::doContextSwitch()
1307{
1308 if (contextSwitch) {
1309
1310 //ADD CODE TO DEACTIVE THREAD HERE (???)
1311
1312 for (int tid=0; tid < cpuWaitList.size(); tid++) {
1313 activateWhenReady(tid);
1314 }
1315
1316 if (cpuWaitList.size() == 0)
1317 contextSwitch = true;
1318 }
1319}
1320
1321template <class Impl>
1322void
1323FullO3CPU<Impl>::updateThreadPriority()
1324{
1325 if (activeThreads.size() > 1)
1326 {
1327 //DEFAULT TO ROUND ROBIN SCHEME
1328 //e.g. Move highest priority to end of thread list
1329 list<unsigned>::iterator list_begin = activeThreads.begin();
1330 list<unsigned>::iterator list_end = activeThreads.end();
1331
1332 unsigned high_thread = *list_begin;
1333
1334 activeThreads.erase(list_begin);
1335
1336 activeThreads.push_back(high_thread);
1337 }
1338}
1339
1340// Forward declaration of FullO3CPU.
1341template class FullO3CPU<O3CPUImpl>;