1/*
2 * Copyright (c) 2011-2012, 2014 ARM Limited
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Copyright (c) 2004-2006 The Regents of The University of Michigan
16 * Copyright (c) 2011 Regents of the University of California
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are
21 * met: redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer;
23 * redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution;
26 * neither the name of the copyright holders nor the names of its
27 * contributors may be used to endorse or promote products derived from
28 * this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 * Authors: Kevin Lim
43 * Korey Sewell
44 * Rick Strong
45 */
46
47#include "arch/kernel_stats.hh"
48#include "config/the_isa.hh"
49#include "cpu/checker/cpu.hh"
50#include "cpu/checker/thread_context.hh"
51#include "cpu/o3/cpu.hh"
52#include "cpu/o3/isa_specific.hh"
53#include "cpu/o3/thread_context.hh"
54#include "cpu/activity.hh"
55#include "cpu/quiesce_event.hh"
56#include "cpu/simple_thread.hh"
57#include "cpu/thread_context.hh"
58#include "debug/Activity.hh"
59#include "debug/Drain.hh"
60#include "debug/O3CPU.hh"
61#include "debug/Quiesce.hh"
62#include "enums/MemoryMode.hh"
63#include "sim/core.hh"
64#include "sim/full_system.hh"
65#include "sim/process.hh"
66#include "sim/stat_control.hh"
67#include "sim/system.hh"
68
69#if THE_ISA == ALPHA_ISA
70#include "arch/alpha/osfpal.hh"
71#include "debug/Activity.hh"
72#endif
73
74struct BaseCPUParams;
75
76using namespace TheISA;
77using namespace std;
78
79BaseO3CPU::BaseO3CPU(BaseCPUParams *params)
80 : BaseCPU(params)
81{
82}
83
84void
85BaseO3CPU::regStats()
86{
87 BaseCPU::regStats();
88}
89
90template<class Impl>
91bool
92FullO3CPU<Impl>::IcachePort::recvTimingResp(PacketPtr pkt)
93{
94 DPRINTF(O3CPU, "Fetch unit received timing\n");
95 // We shouldn't ever get a cacheable block in ownership state
96 assert(pkt->req->isUncacheable() ||
97 !(pkt->memInhibitAsserted() && !pkt->sharedAsserted()));
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 for (ThreadID tid = 0; tid < cpu->numThreads; tid++) {
122 if (cpu->getCpuAddrMonitor(tid)->doMonitor(pkt)) {
123 cpu->wakeup(tid);
124 }
125 }
126 lsq->recvTimingSnoopReq(pkt);
127}
128
129template <class Impl>
130void
131FullO3CPU<Impl>::DcachePort::recvReqRetry()
132{
133 lsq->recvReqRetry();
134}
135
136template <class Impl>
137FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
138 : Event(CPU_Tick_Pri), cpu(c)
139{
140}
141
142template <class Impl>
143void
144FullO3CPU<Impl>::TickEvent::process()
145{
146 cpu->tick();
147}
148
149template <class Impl>
150const char *
151FullO3CPU<Impl>::TickEvent::description() const
152{
153 return "FullO3CPU tick";
154}
155
156template <class Impl>
157FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
158 : BaseO3CPU(params),
159 itb(params->itb),
160 dtb(params->dtb),
161 tickEvent(this),
162#ifndef NDEBUG
163 instcount(0),
164#endif
165 removeInstsThisCycle(false),
166 fetch(this, params),
167 decode(this, params),
168 rename(this, params),
169 iew(this, params),
170 commit(this, params),
171
172 regFile(params->numPhysIntRegs,
173 params->numPhysFloatRegs,
174 params->numPhysCCRegs),
175
176 freeList(name() + ".freelist", ®File),
177
178 rob(this, params),
179
180 scoreboard(name() + ".scoreboard",
181 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs,
182 TheISA::ZeroReg, TheISA::ZeroReg),
183
184 isa(numThreads, NULL),
185
186 icachePort(&fetch, this),
187 dcachePort(&iew.ldstQueue, this),
188
189 timeBuffer(params->backComSize, params->forwardComSize),
190 fetchQueue(params->backComSize, params->forwardComSize),
191 decodeQueue(params->backComSize, params->forwardComSize),
192 renameQueue(params->backComSize, params->forwardComSize),
193 iewQueue(params->backComSize, params->forwardComSize),
194 activityRec(name(), NumStages,
195 params->backComSize + params->forwardComSize,
196 params->activity),
197
198 globalSeqNum(1),
199 system(params->system),
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.empty()) {
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(drainState() != DrainState::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 (drainState() == DrainState::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
| 1/*
2 * Copyright (c) 2011-2012, 2014 ARM Limited
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating
9 * to a hardware implementation of the functionality of the software
10 * licensed hereunder. You may use the software subject to the license
11 * terms below provided that you ensure that this notice is replicated
12 * unmodified and in its entirety in all distributions of the software,
13 * modified or unmodified, in source code or in binary form.
14 *
15 * Copyright (c) 2004-2006 The Regents of The University of Michigan
16 * Copyright (c) 2011 Regents of the University of California
17 * All rights reserved.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions are
21 * met: redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer;
23 * redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution;
26 * neither the name of the copyright holders nor the names of its
27 * contributors may be used to endorse or promote products derived from
28 * this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 *
42 * Authors: Kevin Lim
43 * Korey Sewell
44 * Rick Strong
45 */
46
47#include "arch/kernel_stats.hh"
48#include "config/the_isa.hh"
49#include "cpu/checker/cpu.hh"
50#include "cpu/checker/thread_context.hh"
51#include "cpu/o3/cpu.hh"
52#include "cpu/o3/isa_specific.hh"
53#include "cpu/o3/thread_context.hh"
54#include "cpu/activity.hh"
55#include "cpu/quiesce_event.hh"
56#include "cpu/simple_thread.hh"
57#include "cpu/thread_context.hh"
58#include "debug/Activity.hh"
59#include "debug/Drain.hh"
60#include "debug/O3CPU.hh"
61#include "debug/Quiesce.hh"
62#include "enums/MemoryMode.hh"
63#include "sim/core.hh"
64#include "sim/full_system.hh"
65#include "sim/process.hh"
66#include "sim/stat_control.hh"
67#include "sim/system.hh"
68
69#if THE_ISA == ALPHA_ISA
70#include "arch/alpha/osfpal.hh"
71#include "debug/Activity.hh"
72#endif
73
74struct BaseCPUParams;
75
76using namespace TheISA;
77using namespace std;
78
79BaseO3CPU::BaseO3CPU(BaseCPUParams *params)
80 : BaseCPU(params)
81{
82}
83
84void
85BaseO3CPU::regStats()
86{
87 BaseCPU::regStats();
88}
89
90template<class Impl>
91bool
92FullO3CPU<Impl>::IcachePort::recvTimingResp(PacketPtr pkt)
93{
94 DPRINTF(O3CPU, "Fetch unit received timing\n");
95 // We shouldn't ever get a cacheable block in ownership state
96 assert(pkt->req->isUncacheable() ||
97 !(pkt->memInhibitAsserted() && !pkt->sharedAsserted()));
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 for (ThreadID tid = 0; tid < cpu->numThreads; tid++) {
122 if (cpu->getCpuAddrMonitor(tid)->doMonitor(pkt)) {
123 cpu->wakeup(tid);
124 }
125 }
126 lsq->recvTimingSnoopReq(pkt);
127}
128
129template <class Impl>
130void
131FullO3CPU<Impl>::DcachePort::recvReqRetry()
132{
133 lsq->recvReqRetry();
134}
135
136template <class Impl>
137FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c)
138 : Event(CPU_Tick_Pri), cpu(c)
139{
140}
141
142template <class Impl>
143void
144FullO3CPU<Impl>::TickEvent::process()
145{
146 cpu->tick();
147}
148
149template <class Impl>
150const char *
151FullO3CPU<Impl>::TickEvent::description() const
152{
153 return "FullO3CPU tick";
154}
155
156template <class Impl>
157FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params)
158 : BaseO3CPU(params),
159 itb(params->itb),
160 dtb(params->dtb),
161 tickEvent(this),
162#ifndef NDEBUG
163 instcount(0),
164#endif
165 removeInstsThisCycle(false),
166 fetch(this, params),
167 decode(this, params),
168 rename(this, params),
169 iew(this, params),
170 commit(this, params),
171
172 regFile(params->numPhysIntRegs,
173 params->numPhysFloatRegs,
174 params->numPhysCCRegs),
175
176 freeList(name() + ".freelist", ®File),
177
178 rob(this, params),
179
180 scoreboard(name() + ".scoreboard",
181 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs,
182 TheISA::ZeroReg, TheISA::ZeroReg),
183
184 isa(numThreads, NULL),
185
186 icachePort(&fetch, this),
187 dcachePort(&iew.ldstQueue, this),
188
189 timeBuffer(params->backComSize, params->forwardComSize),
190 fetchQueue(params->backComSize, params->forwardComSize),
191 decodeQueue(params->backComSize, params->forwardComSize),
192 renameQueue(params->backComSize, params->forwardComSize),
193 iewQueue(params->backComSize, params->forwardComSize),
194 activityRec(name(), NumStages,
195 params->backComSize + params->forwardComSize,
196 params->activity),
197
198 globalSeqNum(1),
199 system(params->system),
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.empty()) {
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(drainState() != DrainState::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 (drainState() == DrainState::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++) {
| 793 int max_reg = TheISA::FP_Reg_Base + TheISA::NumFloatRegs;
794 for (int freg = TheISA::FP_Reg_Base; 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
| 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;
| 802 max_reg = TheISA::CC_Reg_Base + TheISA::NumCCRegs;
803 for (int creg = TheISA::CC_Reg_Base;
|
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[0]->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[0]->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(CheckpointOut &cp, ThreadID tid) const
990{
991 thread[tid]->serialize(cp);
992}
993
994template <class Impl>
995void
996FullO3CPU<Impl>::unserializeThread(CheckpointIn &cp, ThreadID tid)
997{
998 thread[tid]->unserialize(cp);
999}
1000
1001template <class Impl>
1002DrainState
1003FullO3CPU<Impl>::drain()
1004{
1005 // If the CPU isn't doing anything, then return immediately.
1006 if (switchedOut())
1007 return DrainState::Drained;
1008
1009 DPRINTF(Drain, "Draining...\n");
1010
1011 // We only need to signal a drain to the commit stage as this
1012 // initiates squashing controls the draining. Once the commit
1013 // stage commits an instruction where it is safe to stop, it'll
1014 // squash the rest of the instructions in the pipeline and force
1015 // the fetch stage to stall. The pipeline will be drained once all
1016 // in-flight instructions have retired.
1017 commit.drain();
1018
1019 // Wake the CPU and record activity so everything can drain out if
1020 // the CPU was not able to immediately drain.
1021 if (!isDrained()) {
1022 wakeCPU();
1023 activityRec.activity();
1024
1025 DPRINTF(Drain, "CPU not drained\n");
1026
1027 return DrainState::Draining;
1028 } else {
1029 DPRINTF(Drain, "CPU is already drained\n");
1030 if (tickEvent.scheduled())
1031 deschedule(tickEvent);
1032
1033 // Flush out any old data from the time buffers. In
1034 // particular, there might be some data in flight from the
1035 // fetch stage that isn't visible in any of the CPU buffers we
1036 // test in isDrained().
1037 for (int i = 0; i < timeBuffer.getSize(); ++i) {
1038 timeBuffer.advance();
1039 fetchQueue.advance();
1040 decodeQueue.advance();
1041 renameQueue.advance();
1042 iewQueue.advance();
1043 }
1044
1045 drainSanityCheck();
1046 return DrainState::Drained;
1047 }
1048}
1049
1050template <class Impl>
1051bool
1052FullO3CPU<Impl>::tryDrain()
1053{
1054 if (drainState() != DrainState::Draining || !isDrained())
1055 return false;
1056
1057 if (tickEvent.scheduled())
1058 deschedule(tickEvent);
1059
1060 DPRINTF(Drain, "CPU done draining, processing drain event\n");
1061 signalDrainDone();
1062
1063 return true;
1064}
1065
1066template <class Impl>
1067void
1068FullO3CPU<Impl>::drainSanityCheck() const
1069{
1070 assert(isDrained());
1071 fetch.drainSanityCheck();
1072 decode.drainSanityCheck();
1073 rename.drainSanityCheck();
1074 iew.drainSanityCheck();
1075 commit.drainSanityCheck();
1076}
1077
1078template <class Impl>
1079bool
1080FullO3CPU<Impl>::isDrained() const
1081{
1082 bool drained(true);
1083
1084 if (!instList.empty() || !removeList.empty()) {
1085 DPRINTF(Drain, "Main CPU structures not drained.\n");
1086 drained = false;
1087 }
1088
1089 if (!fetch.isDrained()) {
1090 DPRINTF(Drain, "Fetch not drained.\n");
1091 drained = false;
1092 }
1093
1094 if (!decode.isDrained()) {
1095 DPRINTF(Drain, "Decode not drained.\n");
1096 drained = false;
1097 }
1098
1099 if (!rename.isDrained()) {
1100 DPRINTF(Drain, "Rename not drained.\n");
1101 drained = false;
1102 }
1103
1104 if (!iew.isDrained()) {
1105 DPRINTF(Drain, "IEW not drained.\n");
1106 drained = false;
1107 }
1108
1109 if (!commit.isDrained()) {
1110 DPRINTF(Drain, "Commit not drained.\n");
1111 drained = false;
1112 }
1113
1114 return drained;
1115}
1116
1117template <class Impl>
1118void
1119FullO3CPU<Impl>::commitDrained(ThreadID tid)
1120{
1121 fetch.drainStall(tid);
1122}
1123
1124template <class Impl>
1125void
1126FullO3CPU<Impl>::drainResume()
1127{
1128 if (switchedOut())
1129 return;
1130
1131 DPRINTF(Drain, "Resuming...\n");
1132 verifyMemoryMode();
1133
1134 fetch.drainResume();
1135 commit.drainResume();
1136
1137 _status = Idle;
1138 for (ThreadID i = 0; i < thread.size(); i++) {
1139 if (thread[i]->status() == ThreadContext::Active) {
1140 DPRINTF(Drain, "Activating thread: %i\n", i);
1141 activateThread(i);
1142 _status = Running;
1143 }
1144 }
1145
1146 assert(!tickEvent.scheduled());
1147 if (_status == Running)
1148 schedule(tickEvent, nextCycle());
1149}
1150
1151template <class Impl>
1152void
1153FullO3CPU<Impl>::switchOut()
1154{
1155 DPRINTF(O3CPU, "Switching out\n");
1156 BaseCPU::switchOut();
1157
1158 activityRec.reset();
1159
1160 _status = SwitchedOut;
1161
1162 if (checker)
1163 checker->switchOut();
1164}
1165
1166template <class Impl>
1167void
1168FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
1169{
1170 BaseCPU::takeOverFrom(oldCPU);
1171
1172 fetch.takeOverFrom();
1173 decode.takeOverFrom();
1174 rename.takeOverFrom();
1175 iew.takeOverFrom();
1176 commit.takeOverFrom();
1177
1178 assert(!tickEvent.scheduled());
1179
1180 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU);
1181 if (oldO3CPU)
1182 globalSeqNum = oldO3CPU->globalSeqNum;
1183
1184 lastRunningCycle = curCycle();
1185 _status = Idle;
1186}
1187
1188template <class Impl>
1189void
1190FullO3CPU<Impl>::verifyMemoryMode() const
1191{
1192 if (!system->isTimingMode()) {
1193 fatal("The O3 CPU requires the memory system to be in "
1194 "'timing' mode.\n");
1195 }
1196}
1197
1198template <class Impl>
1199TheISA::MiscReg
1200FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) const
1201{
1202 return this->isa[tid]->readMiscRegNoEffect(misc_reg);
1203}
1204
1205template <class Impl>
1206TheISA::MiscReg
1207FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid)
1208{
1209 miscRegfileReads++;
1210 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid));
1211}
1212
1213template <class Impl>
1214void
1215FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg,
1216 const TheISA::MiscReg &val, ThreadID tid)
1217{
1218 this->isa[tid]->setMiscRegNoEffect(misc_reg, val);
1219}
1220
1221template <class Impl>
1222void
1223FullO3CPU<Impl>::setMiscReg(int misc_reg,
1224 const TheISA::MiscReg &val, ThreadID tid)
1225{
1226 miscRegfileWrites++;
1227 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid));
1228}
1229
1230template <class Impl>
1231uint64_t
1232FullO3CPU<Impl>::readIntReg(int reg_idx)
1233{
1234 intRegfileReads++;
1235 return regFile.readIntReg(reg_idx);
1236}
1237
1238template <class Impl>
1239FloatReg
1240FullO3CPU<Impl>::readFloatReg(int reg_idx)
1241{
1242 fpRegfileReads++;
1243 return regFile.readFloatReg(reg_idx);
1244}
1245
1246template <class Impl>
1247FloatRegBits
1248FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
1249{
1250 fpRegfileReads++;
1251 return regFile.readFloatRegBits(reg_idx);
1252}
1253
1254template <class Impl>
1255CCReg
1256FullO3CPU<Impl>::readCCReg(int reg_idx)
1257{
1258 ccRegfileReads++;
1259 return regFile.readCCReg(reg_idx);
1260}
1261
1262template <class Impl>
1263void
1264FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
1265{
1266 intRegfileWrites++;
1267 regFile.setIntReg(reg_idx, val);
1268}
1269
1270template <class Impl>
1271void
1272FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
1273{
1274 fpRegfileWrites++;
1275 regFile.setFloatReg(reg_idx, val);
1276}
1277
1278template <class Impl>
1279void
1280FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
1281{
1282 fpRegfileWrites++;
1283 regFile.setFloatRegBits(reg_idx, val);
1284}
1285
1286template <class Impl>
1287void
1288FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val)
1289{
1290 ccRegfileWrites++;
1291 regFile.setCCReg(reg_idx, val);
1292}
1293
1294template <class Impl>
1295uint64_t
1296FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid)
1297{
1298 intRegfileReads++;
1299 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1300
1301 return regFile.readIntReg(phys_reg);
1302}
1303
1304template <class Impl>
1305float
1306FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid)
1307{
1308 fpRegfileReads++;
1309 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1310
1311 return regFile.readFloatReg(phys_reg);
1312}
1313
1314template <class Impl>
1315uint64_t
1316FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid)
1317{
1318 fpRegfileReads++;
1319 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1320
1321 return regFile.readFloatRegBits(phys_reg);
1322}
1323
1324template <class Impl>
1325CCReg
1326FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid)
1327{
1328 ccRegfileReads++;
1329 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1330
1331 return regFile.readCCReg(phys_reg);
1332}
1333
1334template <class Impl>
1335void
1336FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid)
1337{
1338 intRegfileWrites++;
1339 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1340
1341 regFile.setIntReg(phys_reg, val);
1342}
1343
1344template <class Impl>
1345void
1346FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid)
1347{
1348 fpRegfileWrites++;
1349 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1350
1351 regFile.setFloatReg(phys_reg, val);
1352}
1353
1354template <class Impl>
1355void
1356FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid)
1357{
1358 fpRegfileWrites++;
1359 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1360
1361 regFile.setFloatRegBits(phys_reg, val);
1362}
1363
1364template <class Impl>
1365void
1366FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid)
1367{
1368 ccRegfileWrites++;
1369 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1370
1371 regFile.setCCReg(phys_reg, val);
1372}
1373
1374template <class Impl>
1375TheISA::PCState
1376FullO3CPU<Impl>::pcState(ThreadID tid)
1377{
1378 return commit.pcState(tid);
1379}
1380
1381template <class Impl>
1382void
1383FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid)
1384{
1385 commit.pcState(val, tid);
1386}
1387
1388template <class Impl>
1389Addr
1390FullO3CPU<Impl>::instAddr(ThreadID tid)
1391{
1392 return commit.instAddr(tid);
1393}
1394
1395template <class Impl>
1396Addr
1397FullO3CPU<Impl>::nextInstAddr(ThreadID tid)
1398{
1399 return commit.nextInstAddr(tid);
1400}
1401
1402template <class Impl>
1403MicroPC
1404FullO3CPU<Impl>::microPC(ThreadID tid)
1405{
1406 return commit.microPC(tid);
1407}
1408
1409template <class Impl>
1410void
1411FullO3CPU<Impl>::squashFromTC(ThreadID tid)
1412{
1413 this->thread[tid]->noSquashFromTC = true;
1414 this->commit.generateTCEvent(tid);
1415}
1416
1417template <class Impl>
1418typename FullO3CPU<Impl>::ListIt
1419FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1420{
1421 instList.push_back(inst);
1422
1423 return --(instList.end());
1424}
1425
1426template <class Impl>
1427void
1428FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst)
1429{
1430 // Keep an instruction count.
1431 if (!inst->isMicroop() || inst->isLastMicroop()) {
1432 thread[tid]->numInst++;
1433 thread[tid]->numInsts++;
1434 committedInsts[tid]++;
1435 system->totalNumInsts++;
1436
1437 // Check for instruction-count-based events.
1438 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1439 system->instEventQueue.serviceEvents(system->totalNumInsts);
1440 }
1441 thread[tid]->numOp++;
1442 thread[tid]->numOps++;
1443 committedOps[tid]++;
1444
1445 probeInstCommit(inst->staticInst);
1446}
1447
1448template <class Impl>
1449void
1450FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1451{
1452 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s "
1453 "[sn:%lli]\n",
1454 inst->threadNumber, inst->pcState(), inst->seqNum);
1455
1456 removeInstsThisCycle = true;
1457
1458 // Remove the front instruction.
1459 removeList.push(inst->getInstListIt());
1460}
1461
1462template <class Impl>
1463void
1464FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid)
1465{
1466 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1467 " list.\n", tid);
1468
1469 ListIt end_it;
1470
1471 bool rob_empty = false;
1472
1473 if (instList.empty()) {
1474 return;
1475 } else if (rob.isEmpty(tid)) {
1476 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1477 end_it = instList.begin();
1478 rob_empty = true;
1479 } else {
1480 end_it = (rob.readTailInst(tid))->getInstListIt();
1481 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1482 }
1483
1484 removeInstsThisCycle = true;
1485
1486 ListIt inst_it = instList.end();
1487
1488 inst_it--;
1489
1490 // Walk through the instruction list, removing any instructions
1491 // that were inserted after the given instruction iterator, end_it.
1492 while (inst_it != end_it) {
1493 assert(!instList.empty());
1494
1495 squashInstIt(inst_it, tid);
1496
1497 inst_it--;
1498 }
1499
1500 // If the ROB was empty, then we actually need to remove the first
1501 // instruction as well.
1502 if (rob_empty) {
1503 squashInstIt(inst_it, tid);
1504 }
1505}
1506
1507template <class Impl>
1508void
1509FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid)
1510{
1511 assert(!instList.empty());
1512
1513 removeInstsThisCycle = true;
1514
1515 ListIt inst_iter = instList.end();
1516
1517 inst_iter--;
1518
1519 DPRINTF(O3CPU, "Deleting instructions from instruction "
1520 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1521 tid, seq_num, (*inst_iter)->seqNum);
1522
1523 while ((*inst_iter)->seqNum > seq_num) {
1524
1525 bool break_loop = (inst_iter == instList.begin());
1526
1527 squashInstIt(inst_iter, tid);
1528
1529 inst_iter--;
1530
1531 if (break_loop)
1532 break;
1533 }
1534}
1535
1536template <class Impl>
1537inline void
1538FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid)
1539{
1540 if ((*instIt)->threadNumber == tid) {
1541 DPRINTF(O3CPU, "Squashing instruction, "
1542 "[tid:%i] [sn:%lli] PC %s\n",
1543 (*instIt)->threadNumber,
1544 (*instIt)->seqNum,
1545 (*instIt)->pcState());
1546
1547 // Mark it as squashed.
1548 (*instIt)->setSquashed();
1549
1550 // @todo: Formulate a consistent method for deleting
1551 // instructions from the instruction list
1552 // Remove the instruction from the list.
1553 removeList.push(instIt);
1554 }
1555}
1556
1557template <class Impl>
1558void
1559FullO3CPU<Impl>::cleanUpRemovedInsts()
1560{
1561 while (!removeList.empty()) {
1562 DPRINTF(O3CPU, "Removing instruction, "
1563 "[tid:%i] [sn:%lli] PC %s\n",
1564 (*removeList.front())->threadNumber,
1565 (*removeList.front())->seqNum,
1566 (*removeList.front())->pcState());
1567
1568 instList.erase(removeList.front());
1569
1570 removeList.pop();
1571 }
1572
1573 removeInstsThisCycle = false;
1574}
1575/*
1576template <class Impl>
1577void
1578FullO3CPU<Impl>::removeAllInsts()
1579{
1580 instList.clear();
1581}
1582*/
1583template <class Impl>
1584void
1585FullO3CPU<Impl>::dumpInsts()
1586{
1587 int num = 0;
1588
1589 ListIt inst_list_it = instList.begin();
1590
1591 cprintf("Dumping Instruction List\n");
1592
1593 while (inst_list_it != instList.end()) {
1594 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1595 "Squashed:%i\n\n",
1596 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber,
1597 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1598 (*inst_list_it)->isSquashed());
1599 inst_list_it++;
1600 ++num;
1601 }
1602}
1603/*
1604template <class Impl>
1605void
1606FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1607{
1608 iew.wakeDependents(inst);
1609}
1610*/
1611template <class Impl>
1612void
1613FullO3CPU<Impl>::wakeCPU()
1614{
1615 if (activityRec.active() || tickEvent.scheduled()) {
1616 DPRINTF(Activity, "CPU already running.\n");
1617 return;
1618 }
1619
1620 DPRINTF(Activity, "Waking up CPU\n");
1621
1622 Cycles cycles(curCycle() - lastRunningCycle);
1623 // @todo: This is an oddity that is only here to match the stats
1624 if (cycles > 1) {
1625 --cycles;
1626 idleCycles += cycles;
1627 numCycles += cycles;
1628 ppCycles->notify(cycles);
1629 }
1630
1631 schedule(tickEvent, clockEdge());
1632}
1633
1634template <class Impl>
1635void
1636FullO3CPU<Impl>::wakeup(ThreadID tid)
1637{
1638 if (this->thread[tid]->status() != ThreadContext::Suspended)
1639 return;
1640
1641 this->wakeCPU();
1642
1643 DPRINTF(Quiesce, "Suspended Processor woken\n");
1644 this->threadContexts[tid]->activate();
1645}
1646
1647template <class Impl>
1648ThreadID
1649FullO3CPU<Impl>::getFreeTid()
1650{
1651 for (ThreadID tid = 0; tid < numThreads; tid++) {
1652 if (!tids[tid]) {
1653 tids[tid] = true;
1654 return tid;
1655 }
1656 }
1657
1658 return InvalidThreadID;
1659}
1660
1661template <class Impl>
1662void
1663FullO3CPU<Impl>::updateThreadPriority()
1664{
1665 if (activeThreads.size() > 1) {
1666 //DEFAULT TO ROUND ROBIN SCHEME
1667 //e.g. Move highest priority to end of thread list
1668 list<ThreadID>::iterator list_begin = activeThreads.begin();
1669
1670 unsigned high_thread = *list_begin;
1671
1672 activeThreads.erase(list_begin);
1673
1674 activeThreads.push_back(high_thread);
1675 }
1676}
1677
1678// Forward declaration of FullO3CPU.
1679template class FullO3CPU<O3CPUImpl>;
| 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[0]->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[0]->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(CheckpointOut &cp, ThreadID tid) const
990{
991 thread[tid]->serialize(cp);
992}
993
994template <class Impl>
995void
996FullO3CPU<Impl>::unserializeThread(CheckpointIn &cp, ThreadID tid)
997{
998 thread[tid]->unserialize(cp);
999}
1000
1001template <class Impl>
1002DrainState
1003FullO3CPU<Impl>::drain()
1004{
1005 // If the CPU isn't doing anything, then return immediately.
1006 if (switchedOut())
1007 return DrainState::Drained;
1008
1009 DPRINTF(Drain, "Draining...\n");
1010
1011 // We only need to signal a drain to the commit stage as this
1012 // initiates squashing controls the draining. Once the commit
1013 // stage commits an instruction where it is safe to stop, it'll
1014 // squash the rest of the instructions in the pipeline and force
1015 // the fetch stage to stall. The pipeline will be drained once all
1016 // in-flight instructions have retired.
1017 commit.drain();
1018
1019 // Wake the CPU and record activity so everything can drain out if
1020 // the CPU was not able to immediately drain.
1021 if (!isDrained()) {
1022 wakeCPU();
1023 activityRec.activity();
1024
1025 DPRINTF(Drain, "CPU not drained\n");
1026
1027 return DrainState::Draining;
1028 } else {
1029 DPRINTF(Drain, "CPU is already drained\n");
1030 if (tickEvent.scheduled())
1031 deschedule(tickEvent);
1032
1033 // Flush out any old data from the time buffers. In
1034 // particular, there might be some data in flight from the
1035 // fetch stage that isn't visible in any of the CPU buffers we
1036 // test in isDrained().
1037 for (int i = 0; i < timeBuffer.getSize(); ++i) {
1038 timeBuffer.advance();
1039 fetchQueue.advance();
1040 decodeQueue.advance();
1041 renameQueue.advance();
1042 iewQueue.advance();
1043 }
1044
1045 drainSanityCheck();
1046 return DrainState::Drained;
1047 }
1048}
1049
1050template <class Impl>
1051bool
1052FullO3CPU<Impl>::tryDrain()
1053{
1054 if (drainState() != DrainState::Draining || !isDrained())
1055 return false;
1056
1057 if (tickEvent.scheduled())
1058 deschedule(tickEvent);
1059
1060 DPRINTF(Drain, "CPU done draining, processing drain event\n");
1061 signalDrainDone();
1062
1063 return true;
1064}
1065
1066template <class Impl>
1067void
1068FullO3CPU<Impl>::drainSanityCheck() const
1069{
1070 assert(isDrained());
1071 fetch.drainSanityCheck();
1072 decode.drainSanityCheck();
1073 rename.drainSanityCheck();
1074 iew.drainSanityCheck();
1075 commit.drainSanityCheck();
1076}
1077
1078template <class Impl>
1079bool
1080FullO3CPU<Impl>::isDrained() const
1081{
1082 bool drained(true);
1083
1084 if (!instList.empty() || !removeList.empty()) {
1085 DPRINTF(Drain, "Main CPU structures not drained.\n");
1086 drained = false;
1087 }
1088
1089 if (!fetch.isDrained()) {
1090 DPRINTF(Drain, "Fetch not drained.\n");
1091 drained = false;
1092 }
1093
1094 if (!decode.isDrained()) {
1095 DPRINTF(Drain, "Decode not drained.\n");
1096 drained = false;
1097 }
1098
1099 if (!rename.isDrained()) {
1100 DPRINTF(Drain, "Rename not drained.\n");
1101 drained = false;
1102 }
1103
1104 if (!iew.isDrained()) {
1105 DPRINTF(Drain, "IEW not drained.\n");
1106 drained = false;
1107 }
1108
1109 if (!commit.isDrained()) {
1110 DPRINTF(Drain, "Commit not drained.\n");
1111 drained = false;
1112 }
1113
1114 return drained;
1115}
1116
1117template <class Impl>
1118void
1119FullO3CPU<Impl>::commitDrained(ThreadID tid)
1120{
1121 fetch.drainStall(tid);
1122}
1123
1124template <class Impl>
1125void
1126FullO3CPU<Impl>::drainResume()
1127{
1128 if (switchedOut())
1129 return;
1130
1131 DPRINTF(Drain, "Resuming...\n");
1132 verifyMemoryMode();
1133
1134 fetch.drainResume();
1135 commit.drainResume();
1136
1137 _status = Idle;
1138 for (ThreadID i = 0; i < thread.size(); i++) {
1139 if (thread[i]->status() == ThreadContext::Active) {
1140 DPRINTF(Drain, "Activating thread: %i\n", i);
1141 activateThread(i);
1142 _status = Running;
1143 }
1144 }
1145
1146 assert(!tickEvent.scheduled());
1147 if (_status == Running)
1148 schedule(tickEvent, nextCycle());
1149}
1150
1151template <class Impl>
1152void
1153FullO3CPU<Impl>::switchOut()
1154{
1155 DPRINTF(O3CPU, "Switching out\n");
1156 BaseCPU::switchOut();
1157
1158 activityRec.reset();
1159
1160 _status = SwitchedOut;
1161
1162 if (checker)
1163 checker->switchOut();
1164}
1165
1166template <class Impl>
1167void
1168FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
1169{
1170 BaseCPU::takeOverFrom(oldCPU);
1171
1172 fetch.takeOverFrom();
1173 decode.takeOverFrom();
1174 rename.takeOverFrom();
1175 iew.takeOverFrom();
1176 commit.takeOverFrom();
1177
1178 assert(!tickEvent.scheduled());
1179
1180 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU);
1181 if (oldO3CPU)
1182 globalSeqNum = oldO3CPU->globalSeqNum;
1183
1184 lastRunningCycle = curCycle();
1185 _status = Idle;
1186}
1187
1188template <class Impl>
1189void
1190FullO3CPU<Impl>::verifyMemoryMode() const
1191{
1192 if (!system->isTimingMode()) {
1193 fatal("The O3 CPU requires the memory system to be in "
1194 "'timing' mode.\n");
1195 }
1196}
1197
1198template <class Impl>
1199TheISA::MiscReg
1200FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) const
1201{
1202 return this->isa[tid]->readMiscRegNoEffect(misc_reg);
1203}
1204
1205template <class Impl>
1206TheISA::MiscReg
1207FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid)
1208{
1209 miscRegfileReads++;
1210 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid));
1211}
1212
1213template <class Impl>
1214void
1215FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg,
1216 const TheISA::MiscReg &val, ThreadID tid)
1217{
1218 this->isa[tid]->setMiscRegNoEffect(misc_reg, val);
1219}
1220
1221template <class Impl>
1222void
1223FullO3CPU<Impl>::setMiscReg(int misc_reg,
1224 const TheISA::MiscReg &val, ThreadID tid)
1225{
1226 miscRegfileWrites++;
1227 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid));
1228}
1229
1230template <class Impl>
1231uint64_t
1232FullO3CPU<Impl>::readIntReg(int reg_idx)
1233{
1234 intRegfileReads++;
1235 return regFile.readIntReg(reg_idx);
1236}
1237
1238template <class Impl>
1239FloatReg
1240FullO3CPU<Impl>::readFloatReg(int reg_idx)
1241{
1242 fpRegfileReads++;
1243 return regFile.readFloatReg(reg_idx);
1244}
1245
1246template <class Impl>
1247FloatRegBits
1248FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
1249{
1250 fpRegfileReads++;
1251 return regFile.readFloatRegBits(reg_idx);
1252}
1253
1254template <class Impl>
1255CCReg
1256FullO3CPU<Impl>::readCCReg(int reg_idx)
1257{
1258 ccRegfileReads++;
1259 return regFile.readCCReg(reg_idx);
1260}
1261
1262template <class Impl>
1263void
1264FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
1265{
1266 intRegfileWrites++;
1267 regFile.setIntReg(reg_idx, val);
1268}
1269
1270template <class Impl>
1271void
1272FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
1273{
1274 fpRegfileWrites++;
1275 regFile.setFloatReg(reg_idx, val);
1276}
1277
1278template <class Impl>
1279void
1280FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
1281{
1282 fpRegfileWrites++;
1283 regFile.setFloatRegBits(reg_idx, val);
1284}
1285
1286template <class Impl>
1287void
1288FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val)
1289{
1290 ccRegfileWrites++;
1291 regFile.setCCReg(reg_idx, val);
1292}
1293
1294template <class Impl>
1295uint64_t
1296FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid)
1297{
1298 intRegfileReads++;
1299 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1300
1301 return regFile.readIntReg(phys_reg);
1302}
1303
1304template <class Impl>
1305float
1306FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid)
1307{
1308 fpRegfileReads++;
1309 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1310
1311 return regFile.readFloatReg(phys_reg);
1312}
1313
1314template <class Impl>
1315uint64_t
1316FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid)
1317{
1318 fpRegfileReads++;
1319 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1320
1321 return regFile.readFloatRegBits(phys_reg);
1322}
1323
1324template <class Impl>
1325CCReg
1326FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid)
1327{
1328 ccRegfileReads++;
1329 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1330
1331 return regFile.readCCReg(phys_reg);
1332}
1333
1334template <class Impl>
1335void
1336FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid)
1337{
1338 intRegfileWrites++;
1339 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx);
1340
1341 regFile.setIntReg(phys_reg, val);
1342}
1343
1344template <class Impl>
1345void
1346FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid)
1347{
1348 fpRegfileWrites++;
1349 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1350
1351 regFile.setFloatReg(phys_reg, val);
1352}
1353
1354template <class Impl>
1355void
1356FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid)
1357{
1358 fpRegfileWrites++;
1359 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx);
1360
1361 regFile.setFloatRegBits(phys_reg, val);
1362}
1363
1364template <class Impl>
1365void
1366FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid)
1367{
1368 ccRegfileWrites++;
1369 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx);
1370
1371 regFile.setCCReg(phys_reg, val);
1372}
1373
1374template <class Impl>
1375TheISA::PCState
1376FullO3CPU<Impl>::pcState(ThreadID tid)
1377{
1378 return commit.pcState(tid);
1379}
1380
1381template <class Impl>
1382void
1383FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid)
1384{
1385 commit.pcState(val, tid);
1386}
1387
1388template <class Impl>
1389Addr
1390FullO3CPU<Impl>::instAddr(ThreadID tid)
1391{
1392 return commit.instAddr(tid);
1393}
1394
1395template <class Impl>
1396Addr
1397FullO3CPU<Impl>::nextInstAddr(ThreadID tid)
1398{
1399 return commit.nextInstAddr(tid);
1400}
1401
1402template <class Impl>
1403MicroPC
1404FullO3CPU<Impl>::microPC(ThreadID tid)
1405{
1406 return commit.microPC(tid);
1407}
1408
1409template <class Impl>
1410void
1411FullO3CPU<Impl>::squashFromTC(ThreadID tid)
1412{
1413 this->thread[tid]->noSquashFromTC = true;
1414 this->commit.generateTCEvent(tid);
1415}
1416
1417template <class Impl>
1418typename FullO3CPU<Impl>::ListIt
1419FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1420{
1421 instList.push_back(inst);
1422
1423 return --(instList.end());
1424}
1425
1426template <class Impl>
1427void
1428FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst)
1429{
1430 // Keep an instruction count.
1431 if (!inst->isMicroop() || inst->isLastMicroop()) {
1432 thread[tid]->numInst++;
1433 thread[tid]->numInsts++;
1434 committedInsts[tid]++;
1435 system->totalNumInsts++;
1436
1437 // Check for instruction-count-based events.
1438 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1439 system->instEventQueue.serviceEvents(system->totalNumInsts);
1440 }
1441 thread[tid]->numOp++;
1442 thread[tid]->numOps++;
1443 committedOps[tid]++;
1444
1445 probeInstCommit(inst->staticInst);
1446}
1447
1448template <class Impl>
1449void
1450FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1451{
1452 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s "
1453 "[sn:%lli]\n",
1454 inst->threadNumber, inst->pcState(), inst->seqNum);
1455
1456 removeInstsThisCycle = true;
1457
1458 // Remove the front instruction.
1459 removeList.push(inst->getInstListIt());
1460}
1461
1462template <class Impl>
1463void
1464FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid)
1465{
1466 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1467 " list.\n", tid);
1468
1469 ListIt end_it;
1470
1471 bool rob_empty = false;
1472
1473 if (instList.empty()) {
1474 return;
1475 } else if (rob.isEmpty(tid)) {
1476 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1477 end_it = instList.begin();
1478 rob_empty = true;
1479 } else {
1480 end_it = (rob.readTailInst(tid))->getInstListIt();
1481 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1482 }
1483
1484 removeInstsThisCycle = true;
1485
1486 ListIt inst_it = instList.end();
1487
1488 inst_it--;
1489
1490 // Walk through the instruction list, removing any instructions
1491 // that were inserted after the given instruction iterator, end_it.
1492 while (inst_it != end_it) {
1493 assert(!instList.empty());
1494
1495 squashInstIt(inst_it, tid);
1496
1497 inst_it--;
1498 }
1499
1500 // If the ROB was empty, then we actually need to remove the first
1501 // instruction as well.
1502 if (rob_empty) {
1503 squashInstIt(inst_it, tid);
1504 }
1505}
1506
1507template <class Impl>
1508void
1509FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid)
1510{
1511 assert(!instList.empty());
1512
1513 removeInstsThisCycle = true;
1514
1515 ListIt inst_iter = instList.end();
1516
1517 inst_iter--;
1518
1519 DPRINTF(O3CPU, "Deleting instructions from instruction "
1520 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1521 tid, seq_num, (*inst_iter)->seqNum);
1522
1523 while ((*inst_iter)->seqNum > seq_num) {
1524
1525 bool break_loop = (inst_iter == instList.begin());
1526
1527 squashInstIt(inst_iter, tid);
1528
1529 inst_iter--;
1530
1531 if (break_loop)
1532 break;
1533 }
1534}
1535
1536template <class Impl>
1537inline void
1538FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid)
1539{
1540 if ((*instIt)->threadNumber == tid) {
1541 DPRINTF(O3CPU, "Squashing instruction, "
1542 "[tid:%i] [sn:%lli] PC %s\n",
1543 (*instIt)->threadNumber,
1544 (*instIt)->seqNum,
1545 (*instIt)->pcState());
1546
1547 // Mark it as squashed.
1548 (*instIt)->setSquashed();
1549
1550 // @todo: Formulate a consistent method for deleting
1551 // instructions from the instruction list
1552 // Remove the instruction from the list.
1553 removeList.push(instIt);
1554 }
1555}
1556
1557template <class Impl>
1558void
1559FullO3CPU<Impl>::cleanUpRemovedInsts()
1560{
1561 while (!removeList.empty()) {
1562 DPRINTF(O3CPU, "Removing instruction, "
1563 "[tid:%i] [sn:%lli] PC %s\n",
1564 (*removeList.front())->threadNumber,
1565 (*removeList.front())->seqNum,
1566 (*removeList.front())->pcState());
1567
1568 instList.erase(removeList.front());
1569
1570 removeList.pop();
1571 }
1572
1573 removeInstsThisCycle = false;
1574}
1575/*
1576template <class Impl>
1577void
1578FullO3CPU<Impl>::removeAllInsts()
1579{
1580 instList.clear();
1581}
1582*/
1583template <class Impl>
1584void
1585FullO3CPU<Impl>::dumpInsts()
1586{
1587 int num = 0;
1588
1589 ListIt inst_list_it = instList.begin();
1590
1591 cprintf("Dumping Instruction List\n");
1592
1593 while (inst_list_it != instList.end()) {
1594 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1595 "Squashed:%i\n\n",
1596 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber,
1597 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1598 (*inst_list_it)->isSquashed());
1599 inst_list_it++;
1600 ++num;
1601 }
1602}
1603/*
1604template <class Impl>
1605void
1606FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1607{
1608 iew.wakeDependents(inst);
1609}
1610*/
1611template <class Impl>
1612void
1613FullO3CPU<Impl>::wakeCPU()
1614{
1615 if (activityRec.active() || tickEvent.scheduled()) {
1616 DPRINTF(Activity, "CPU already running.\n");
1617 return;
1618 }
1619
1620 DPRINTF(Activity, "Waking up CPU\n");
1621
1622 Cycles cycles(curCycle() - lastRunningCycle);
1623 // @todo: This is an oddity that is only here to match the stats
1624 if (cycles > 1) {
1625 --cycles;
1626 idleCycles += cycles;
1627 numCycles += cycles;
1628 ppCycles->notify(cycles);
1629 }
1630
1631 schedule(tickEvent, clockEdge());
1632}
1633
1634template <class Impl>
1635void
1636FullO3CPU<Impl>::wakeup(ThreadID tid)
1637{
1638 if (this->thread[tid]->status() != ThreadContext::Suspended)
1639 return;
1640
1641 this->wakeCPU();
1642
1643 DPRINTF(Quiesce, "Suspended Processor woken\n");
1644 this->threadContexts[tid]->activate();
1645}
1646
1647template <class Impl>
1648ThreadID
1649FullO3CPU<Impl>::getFreeTid()
1650{
1651 for (ThreadID tid = 0; tid < numThreads; tid++) {
1652 if (!tids[tid]) {
1653 tids[tid] = true;
1654 return tid;
1655 }
1656 }
1657
1658 return InvalidThreadID;
1659}
1660
1661template <class Impl>
1662void
1663FullO3CPU<Impl>::updateThreadPriority()
1664{
1665 if (activeThreads.size() > 1) {
1666 //DEFAULT TO ROUND ROBIN SCHEME
1667 //e.g. Move highest priority to end of thread list
1668 list<ThreadID>::iterator list_begin = activeThreads.begin();
1669
1670 unsigned high_thread = *list_begin;
1671
1672 activeThreads.erase(list_begin);
1673
1674 activeThreads.push_back(high_thread);
1675 }
1676}
1677
1678// Forward declaration of FullO3CPU.
1679template class FullO3CPU<O3CPUImpl>;
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