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 switchCount(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 data");
467 // Will change now that the PC and thread state is internal to the CPU
468 // and not in the ThreadContext.
469#if 0
470#if FULL_SYSTEM
471 ThreadContext *src_tc = system->threadContexts[tid];
472#else
473 ThreadContext *src_tc = thread[tid];
474#endif
475
476 //Bind Int Regs to Rename Map
477 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
478 PhysRegIndex phys_reg = freeList.getIntReg();
479
480 renameMap[tid].setEntry(ireg,phys_reg);
481 scoreboard.setReg(phys_reg);
482 }
483
484 //Bind Float Regs to Rename Map
485 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
486 PhysRegIndex phys_reg = freeList.getFloatReg();
487
488 renameMap[tid].setEntry(freg,phys_reg);
489 scoreboard.setReg(phys_reg);
490 }
491
492 //Copy Thread Data Into RegFile
493 this->copyFromTC(tid);
494
495 //Set PC/NPC
496 regFile.pc[tid] = src_tc->readPC();
497 regFile.npc[tid] = src_tc->readNextPC();
498
499 src_tc->setStatus(ThreadContext::Active);
500
501 activateContext(tid,1);
502
503 //Reset ROB/IQ/LSQ Entries
504 commit.rob->resetEntries();
505 iew.resetEntries();
506#endif
507}
508
509template <class Impl>
510void
511FullO3CPU<Impl>::removeThread(unsigned tid)
512{
513 DPRINTF(O3CPU,"[tid:%i] Removing thread data");
514#if 0
515 //Unbind Int Regs from Rename Map
516 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
517 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
518
519 scoreboard.unsetReg(phys_reg);
520 freeList.addReg(phys_reg);
521 }
522
523 //Unbind Float Regs from Rename Map
524 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
525 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
526
527 scoreboard.unsetReg(phys_reg);
528 freeList.addReg(phys_reg);
529 }
530
531 //Copy Thread Data From RegFile
532 /* Fix Me:
533 * Do we really need to do this if we are removing a thread
534 * in the sense that it's finished (exiting)? If the thread is just
535 * being suspended we might...
536 */
537// this->copyToTC(tid);
538
539 //Squash Throughout Pipeline
540 fetch.squash(0,tid);
541 decode.squash(tid);
542 rename.squash(tid);
543
544 assert(iew.ldstQueue.getCount(tid) == 0);
545
546 //Reset ROB/IQ/LSQ Entries
547 if (activeThreads.size() >= 1) {
548 commit.rob->resetEntries();
549 iew.resetEntries();
550 }
551#endif
552}
553
554
555template <class Impl>
556void
557FullO3CPU<Impl>::activateWhenReady(int tid)
558{
559 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming"
560 "(e.g. PhysRegs/ROB/IQ/LSQ) \n",
561 tid);
562
563 bool ready = true;
564
565 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) {
566 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
567 "Phys. Int. Regs.\n",
568 tid);
569 ready = false;
570 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) {
571 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
572 "Phys. Float. Regs.\n",
573 tid);
574 ready = false;
575 } else if (commit.rob->numFreeEntries() >=
576 commit.rob->entryAmount(activeThreads.size() + 1)) {
577 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
578 "ROB entries.\n",
579 tid);
580 ready = false;
581 } else if (iew.instQueue.numFreeEntries() >=
582 iew.instQueue.entryAmount(activeThreads.size() + 1)) {
583 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
584 "IQ entries.\n",
585 tid);
586 ready = false;
587 } else if (iew.ldstQueue.numFreeEntries() >=
588 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) {
589 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
590 "LSQ entries.\n",
591 tid);
592 ready = false;
593 }
594
595 if (ready) {
596 insertThread(tid);
597
598 contextSwitch = false;
599
600 cpuWaitList.remove(tid);
601 } else {
602 suspendContext(tid);
603
604 //blocks fetch
605 contextSwitch = true;
606
607 //do waitlist
608 cpuWaitList.push_back(tid);
609 }
610}
611
612template <class Impl>
613void
614FullO3CPU<Impl>::activateThread(unsigned int tid)
615{
616 list<unsigned>::iterator isActive = find(
617 activeThreads.begin(), activeThreads.end(), tid);
618
619 if (isActive == activeThreads.end()) {
620 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
621 tid);
622
623 activeThreads.push_back(tid);
624 }
625}
626
627
628template <class Impl>
629void
630FullO3CPU<Impl>::activateContext(int tid, int delay)
631{
632 // Needs to set each stage to running as well.
633 if (delay){
634 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate "
635 "on cycle %d\n", tid, curTick + cycles(delay));
636 scheduleActivateThreadEvent(tid, delay);
637 } else {
638 activateThread(tid);
639 }
640
641 if(lastActivatedCycle < curTick) {
642 scheduleTickEvent(delay);
643
644 // Be sure to signal that there's some activity so the CPU doesn't
645 // deschedule itself.
646 activityRec.activity();
647 fetch.wakeFromQuiesce();
648
649 lastActivatedCycle = curTick;
650
651 _status = Running;
652 }
653}
654
655template <class Impl>
656void
657FullO3CPU<Impl>::suspendContext(int tid)
658{
659 DPRINTF(O3CPU,"[tid: %i]: Suspended ...\n", tid);
660 unscheduleTickEvent();
661 _status = Idle;
662/*
663 //Remove From Active List, if Active
664 list<unsigned>::iterator isActive = find(
665 activeThreads.begin(), activeThreads.end(), tid);
666
667 if (isActive != activeThreads.end()) {
668 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
669 tid);
670 activeThreads.erase(isActive);
671 }
672*/
673}
674
675template <class Impl>
676void
677FullO3CPU<Impl>::deallocateContext(int tid)
678{
679 DPRINTF(O3CPU,"[tid:%i]: Deallocating ...", tid);
680/*
681 //Remove From Active List, if Active
682 list<unsigned>::iterator isActive = find(
683 activeThreads.begin(), activeThreads.end(), tid);
684
685 if (isActive != activeThreads.end()) {
686 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
687 tid);
688 activeThreads.erase(isActive);
689
690 removeThread(tid);
691 }
692*/
693}
694
695template <class Impl>
696void
697FullO3CPU<Impl>::haltContext(int tid)
698{
699 DPRINTF(O3CPU,"[tid:%i]: Halted ...", tid);
700/*
701 //Remove From Active List, if Active
702 list<unsigned>::iterator isActive = find(
703 activeThreads.begin(), activeThreads.end(), tid);
704
705 if (isActive != activeThreads.end()) {
706 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
707 tid);
708 activeThreads.erase(isActive);
709
710 removeThread(tid);
711 }
712*/
713}
714
715template <class Impl>
716void
| 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 switchCount(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 data");
467 // Will change now that the PC and thread state is internal to the CPU
468 // and not in the ThreadContext.
469#if 0
470#if FULL_SYSTEM
471 ThreadContext *src_tc = system->threadContexts[tid];
472#else
473 ThreadContext *src_tc = thread[tid];
474#endif
475
476 //Bind Int Regs to Rename Map
477 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
478 PhysRegIndex phys_reg = freeList.getIntReg();
479
480 renameMap[tid].setEntry(ireg,phys_reg);
481 scoreboard.setReg(phys_reg);
482 }
483
484 //Bind Float Regs to Rename Map
485 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
486 PhysRegIndex phys_reg = freeList.getFloatReg();
487
488 renameMap[tid].setEntry(freg,phys_reg);
489 scoreboard.setReg(phys_reg);
490 }
491
492 //Copy Thread Data Into RegFile
493 this->copyFromTC(tid);
494
495 //Set PC/NPC
496 regFile.pc[tid] = src_tc->readPC();
497 regFile.npc[tid] = src_tc->readNextPC();
498
499 src_tc->setStatus(ThreadContext::Active);
500
501 activateContext(tid,1);
502
503 //Reset ROB/IQ/LSQ Entries
504 commit.rob->resetEntries();
505 iew.resetEntries();
506#endif
507}
508
509template <class Impl>
510void
511FullO3CPU<Impl>::removeThread(unsigned tid)
512{
513 DPRINTF(O3CPU,"[tid:%i] Removing thread data");
514#if 0
515 //Unbind Int Regs from Rename Map
516 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) {
517 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg);
518
519 scoreboard.unsetReg(phys_reg);
520 freeList.addReg(phys_reg);
521 }
522
523 //Unbind Float Regs from Rename Map
524 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) {
525 PhysRegIndex phys_reg = renameMap[tid].lookup(freg);
526
527 scoreboard.unsetReg(phys_reg);
528 freeList.addReg(phys_reg);
529 }
530
531 //Copy Thread Data From RegFile
532 /* Fix Me:
533 * Do we really need to do this if we are removing a thread
534 * in the sense that it's finished (exiting)? If the thread is just
535 * being suspended we might...
536 */
537// this->copyToTC(tid);
538
539 //Squash Throughout Pipeline
540 fetch.squash(0,tid);
541 decode.squash(tid);
542 rename.squash(tid);
543
544 assert(iew.ldstQueue.getCount(tid) == 0);
545
546 //Reset ROB/IQ/LSQ Entries
547 if (activeThreads.size() >= 1) {
548 commit.rob->resetEntries();
549 iew.resetEntries();
550 }
551#endif
552}
553
554
555template <class Impl>
556void
557FullO3CPU<Impl>::activateWhenReady(int tid)
558{
559 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming"
560 "(e.g. PhysRegs/ROB/IQ/LSQ) \n",
561 tid);
562
563 bool ready = true;
564
565 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) {
566 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
567 "Phys. Int. Regs.\n",
568 tid);
569 ready = false;
570 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) {
571 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
572 "Phys. Float. Regs.\n",
573 tid);
574 ready = false;
575 } else if (commit.rob->numFreeEntries() >=
576 commit.rob->entryAmount(activeThreads.size() + 1)) {
577 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
578 "ROB entries.\n",
579 tid);
580 ready = false;
581 } else if (iew.instQueue.numFreeEntries() >=
582 iew.instQueue.entryAmount(activeThreads.size() + 1)) {
583 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
584 "IQ entries.\n",
585 tid);
586 ready = false;
587 } else if (iew.ldstQueue.numFreeEntries() >=
588 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) {
589 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough "
590 "LSQ entries.\n",
591 tid);
592 ready = false;
593 }
594
595 if (ready) {
596 insertThread(tid);
597
598 contextSwitch = false;
599
600 cpuWaitList.remove(tid);
601 } else {
602 suspendContext(tid);
603
604 //blocks fetch
605 contextSwitch = true;
606
607 //do waitlist
608 cpuWaitList.push_back(tid);
609 }
610}
611
612template <class Impl>
613void
614FullO3CPU<Impl>::activateThread(unsigned int tid)
615{
616 list<unsigned>::iterator isActive = find(
617 activeThreads.begin(), activeThreads.end(), tid);
618
619 if (isActive == activeThreads.end()) {
620 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n",
621 tid);
622
623 activeThreads.push_back(tid);
624 }
625}
626
627
628template <class Impl>
629void
630FullO3CPU<Impl>::activateContext(int tid, int delay)
631{
632 // Needs to set each stage to running as well.
633 if (delay){
634 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate "
635 "on cycle %d\n", tid, curTick + cycles(delay));
636 scheduleActivateThreadEvent(tid, delay);
637 } else {
638 activateThread(tid);
639 }
640
641 if(lastActivatedCycle < curTick) {
642 scheduleTickEvent(delay);
643
644 // Be sure to signal that there's some activity so the CPU doesn't
645 // deschedule itself.
646 activityRec.activity();
647 fetch.wakeFromQuiesce();
648
649 lastActivatedCycle = curTick;
650
651 _status = Running;
652 }
653}
654
655template <class Impl>
656void
657FullO3CPU<Impl>::suspendContext(int tid)
658{
659 DPRINTF(O3CPU,"[tid: %i]: Suspended ...\n", tid);
660 unscheduleTickEvent();
661 _status = Idle;
662/*
663 //Remove From Active List, if Active
664 list<unsigned>::iterator isActive = find(
665 activeThreads.begin(), activeThreads.end(), tid);
666
667 if (isActive != activeThreads.end()) {
668 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
669 tid);
670 activeThreads.erase(isActive);
671 }
672*/
673}
674
675template <class Impl>
676void
677FullO3CPU<Impl>::deallocateContext(int tid)
678{
679 DPRINTF(O3CPU,"[tid:%i]: Deallocating ...", tid);
680/*
681 //Remove From Active List, if Active
682 list<unsigned>::iterator isActive = find(
683 activeThreads.begin(), activeThreads.end(), tid);
684
685 if (isActive != activeThreads.end()) {
686 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
687 tid);
688 activeThreads.erase(isActive);
689
690 removeThread(tid);
691 }
692*/
693}
694
695template <class Impl>
696void
697FullO3CPU<Impl>::haltContext(int tid)
698{
699 DPRINTF(O3CPU,"[tid:%i]: Halted ...", tid);
700/*
701 //Remove From Active List, if Active
702 list<unsigned>::iterator isActive = find(
703 activeThreads.begin(), activeThreads.end(), tid);
704
705 if (isActive != activeThreads.end()) {
706 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n",
707 tid);
708 activeThreads.erase(isActive);
709
710 removeThread(tid);
711 }
712*/
713}
714
715template <class Impl>
716void
|
754 _status = SwitchedOut;
755 }
756 assert(switchCount <= 5);
757}
758
759template <class Impl>
760void
761FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
762{
763 // Flush out any old data from the time buffers.
764 for (int i = 0; i < 10; ++i) {
765 timeBuffer.advance();
766 fetchQueue.advance();
767 decodeQueue.advance();
768 renameQueue.advance();
769 iewQueue.advance();
770 }
771
772 activityRec.reset();
773
774 BaseCPU::takeOverFrom(oldCPU);
775
776 fetch.takeOverFrom();
777 decode.takeOverFrom();
778 rename.takeOverFrom();
779 iew.takeOverFrom();
780 commit.takeOverFrom();
781
782 assert(!tickEvent.scheduled());
783
784 // @todo: Figure out how to properly select the tid to put onto
785 // the active threads list.
786 int tid = 0;
787
788 list<unsigned>::iterator isActive = find(
789 activeThreads.begin(), activeThreads.end(), tid);
790
791 if (isActive == activeThreads.end()) {
792 //May Need to Re-code this if the delay variable is the delay
793 //needed for thread to activate
794 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n",
795 tid);
796
797 activeThreads.push_back(tid);
798 }
799
800 // Set all statuses to active, schedule the CPU's tick event.
801 // @todo: Fix up statuses so this is handled properly
802 for (int i = 0; i < threadContexts.size(); ++i) {
803 ThreadContext *tc = threadContexts[i];
804 if (tc->status() == ThreadContext::Active && _status != Running) {
805 _status = Running;
806 tickEvent.schedule(curTick);
807 }
808 }
809 if (!tickEvent.scheduled())
810 tickEvent.schedule(curTick);
811}
812
813template <class Impl>
814uint64_t
815FullO3CPU<Impl>::readIntReg(int reg_idx)
816{
817 return regFile.readIntReg(reg_idx);
818}
819
820template <class Impl>
821FloatReg
822FullO3CPU<Impl>::readFloatReg(int reg_idx, int width)
823{
824 return regFile.readFloatReg(reg_idx, width);
825}
826
827template <class Impl>
828FloatReg
829FullO3CPU<Impl>::readFloatReg(int reg_idx)
830{
831 return regFile.readFloatReg(reg_idx);
832}
833
834template <class Impl>
835FloatRegBits
836FullO3CPU<Impl>::readFloatRegBits(int reg_idx, int width)
837{
838 return regFile.readFloatRegBits(reg_idx, width);
839}
840
841template <class Impl>
842FloatRegBits
843FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
844{
845 return regFile.readFloatRegBits(reg_idx);
846}
847
848template <class Impl>
849void
850FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
851{
852 regFile.setIntReg(reg_idx, val);
853}
854
855template <class Impl>
856void
857FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
858{
859 regFile.setFloatReg(reg_idx, val, width);
860}
861
862template <class Impl>
863void
864FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
865{
866 regFile.setFloatReg(reg_idx, val);
867}
868
869template <class Impl>
870void
871FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val, int width)
872{
873 regFile.setFloatRegBits(reg_idx, val, width);
874}
875
876template <class Impl>
877void
878FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
879{
880 regFile.setFloatRegBits(reg_idx, val);
881}
882
883template <class Impl>
884uint64_t
885FullO3CPU<Impl>::readArchIntReg(int reg_idx, unsigned tid)
886{
887 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
888
889 return regFile.readIntReg(phys_reg);
890}
891
892template <class Impl>
893float
894FullO3CPU<Impl>::readArchFloatRegSingle(int reg_idx, unsigned tid)
895{
896 int idx = reg_idx + TheISA::FP_Base_DepTag;
897 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
898
899 return regFile.readFloatReg(phys_reg);
900}
901
902template <class Impl>
903double
904FullO3CPU<Impl>::readArchFloatRegDouble(int reg_idx, unsigned tid)
905{
906 int idx = reg_idx + TheISA::FP_Base_DepTag;
907 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
908
909 return regFile.readFloatReg(phys_reg, 64);
910}
911
912template <class Impl>
913uint64_t
914FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, unsigned tid)
915{
916 int idx = reg_idx + TheISA::FP_Base_DepTag;
917 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
918
919 return regFile.readFloatRegBits(phys_reg);
920}
921
922template <class Impl>
923void
924FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, unsigned tid)
925{
926 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
927
928 regFile.setIntReg(phys_reg, val);
929}
930
931template <class Impl>
932void
933FullO3CPU<Impl>::setArchFloatRegSingle(int reg_idx, float val, unsigned tid)
934{
935 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
936
937 regFile.setFloatReg(phys_reg, val);
938}
939
940template <class Impl>
941void
942FullO3CPU<Impl>::setArchFloatRegDouble(int reg_idx, double val, unsigned tid)
943{
944 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
945
946 regFile.setFloatReg(phys_reg, val, 64);
947}
948
949template <class Impl>
950void
951FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, unsigned tid)
952{
953 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
954
955 regFile.setFloatRegBits(phys_reg, val);
956}
957
958template <class Impl>
959uint64_t
960FullO3CPU<Impl>::readPC(unsigned tid)
961{
962 return commit.readPC(tid);
963}
964
965template <class Impl>
966void
967FullO3CPU<Impl>::setPC(Addr new_PC,unsigned tid)
968{
969 commit.setPC(new_PC, tid);
970}
971
972template <class Impl>
973uint64_t
974FullO3CPU<Impl>::readNextPC(unsigned tid)
975{
976 return commit.readNextPC(tid);
977}
978
979template <class Impl>
980void
981FullO3CPU<Impl>::setNextPC(uint64_t val,unsigned tid)
982{
983 commit.setNextPC(val, tid);
984}
985
986#if THE_ISA != ALPHA_ISA
987template <class Impl>
988uint64_t
989FullO3CPU<Impl>::readNextNPC(unsigned tid)
990{
991 return commit.readNextNPC(tid);
992}
993
994template <class Impl>
995void
996FullO3CPU<Impl>::setNextNNPC(uint64_t val,unsigned tid)
997{
998 commit.setNextNPC(val, tid);
999}
1000#endif
1001
1002template <class Impl>
1003typename FullO3CPU<Impl>::ListIt
1004FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1005{
1006 instList.push_back(inst);
1007
1008 return --(instList.end());
1009}
1010
1011template <class Impl>
1012void
1013FullO3CPU<Impl>::instDone(unsigned tid)
1014{
1015 // Keep an instruction count.
1016 thread[tid]->numInst++;
1017 thread[tid]->numInsts++;
1018 committedInsts[tid]++;
1019 totalCommittedInsts++;
1020
1021 // Check for instruction-count-based events.
1022 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1023}
1024
1025template <class Impl>
1026void
1027FullO3CPU<Impl>::addToRemoveList(DynInstPtr &inst)
1028{
1029 removeInstsThisCycle = true;
1030
1031 removeList.push(inst->getInstListIt());
1032}
1033
1034template <class Impl>
1035void
1036FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1037{
1038 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %#x "
1039 "[sn:%lli]\n",
1040 inst->threadNumber, inst->readPC(), inst->seqNum);
1041
1042 removeInstsThisCycle = true;
1043
1044 // Remove the front instruction.
1045 removeList.push(inst->getInstListIt());
1046}
1047
1048template <class Impl>
1049void
1050FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid)
1051{
1052 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1053 " list.\n", tid);
1054
1055 ListIt end_it;
1056
1057 bool rob_empty = false;
1058
1059 if (instList.empty()) {
1060 return;
1061 } else if (rob.isEmpty(/*tid*/)) {
1062 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1063 end_it = instList.begin();
1064 rob_empty = true;
1065 } else {
1066 end_it = (rob.readTailInst(tid))->getInstListIt();
1067 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1068 }
1069
1070 removeInstsThisCycle = true;
1071
1072 ListIt inst_it = instList.end();
1073
1074 inst_it--;
1075
1076 // Walk through the instruction list, removing any instructions
1077 // that were inserted after the given instruction iterator, end_it.
1078 while (inst_it != end_it) {
1079 assert(!instList.empty());
1080
1081 squashInstIt(inst_it, tid);
1082
1083 inst_it--;
1084 }
1085
1086 // If the ROB was empty, then we actually need to remove the first
1087 // instruction as well.
1088 if (rob_empty) {
1089 squashInstIt(inst_it, tid);
1090 }
1091}
1092
1093template <class Impl>
1094void
1095FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num,
1096 unsigned tid)
1097{
1098 assert(!instList.empty());
1099
1100 removeInstsThisCycle = true;
1101
1102 ListIt inst_iter = instList.end();
1103
1104 inst_iter--;
1105
1106 DPRINTF(O3CPU, "Deleting instructions from instruction "
1107 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1108 tid, seq_num, (*inst_iter)->seqNum);
1109
1110 while ((*inst_iter)->seqNum > seq_num) {
1111
1112 bool break_loop = (inst_iter == instList.begin());
1113
1114 squashInstIt(inst_iter, tid);
1115
1116 inst_iter--;
1117
1118 if (break_loop)
1119 break;
1120 }
1121}
1122
1123template <class Impl>
1124inline void
1125FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, const unsigned &tid)
1126{
1127 if ((*instIt)->threadNumber == tid) {
1128 DPRINTF(O3CPU, "Squashing instruction, "
1129 "[tid:%i] [sn:%lli] PC %#x\n",
1130 (*instIt)->threadNumber,
1131 (*instIt)->seqNum,
1132 (*instIt)->readPC());
1133
1134 // Mark it as squashed.
1135 (*instIt)->setSquashed();
1136
1137 // @todo: Formulate a consistent method for deleting
1138 // instructions from the instruction list
1139 // Remove the instruction from the list.
1140 removeList.push(instIt);
1141 }
1142}
1143
1144template <class Impl>
1145void
1146FullO3CPU<Impl>::cleanUpRemovedInsts()
1147{
1148 while (!removeList.empty()) {
1149 DPRINTF(O3CPU, "Removing instruction, "
1150 "[tid:%i] [sn:%lli] PC %#x\n",
1151 (*removeList.front())->threadNumber,
1152 (*removeList.front())->seqNum,
1153 (*removeList.front())->readPC());
1154
1155 instList.erase(removeList.front());
1156
1157 removeList.pop();
1158 }
1159
1160 removeInstsThisCycle = false;
1161}
1162/*
1163template <class Impl>
1164void
1165FullO3CPU<Impl>::removeAllInsts()
1166{
1167 instList.clear();
1168}
1169*/
1170template <class Impl>
1171void
1172FullO3CPU<Impl>::dumpInsts()
1173{
1174 int num = 0;
1175
1176 ListIt inst_list_it = instList.begin();
1177
1178 cprintf("Dumping Instruction List\n");
1179
1180 while (inst_list_it != instList.end()) {
1181 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1182 "Squashed:%i\n\n",
1183 num, (*inst_list_it)->readPC(), (*inst_list_it)->threadNumber,
1184 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1185 (*inst_list_it)->isSquashed());
1186 inst_list_it++;
1187 ++num;
1188 }
1189}
1190/*
1191template <class Impl>
1192void
1193FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1194{
1195 iew.wakeDependents(inst);
1196}
1197*/
1198template <class Impl>
1199void
1200FullO3CPU<Impl>::wakeCPU()
1201{
1202 if (activityRec.active() || tickEvent.scheduled()) {
1203 DPRINTF(Activity, "CPU already running.\n");
1204 return;
1205 }
1206
1207 DPRINTF(Activity, "Waking up CPU\n");
1208
1209 idleCycles += (curTick - 1) - lastRunningCycle;
1210
1211 tickEvent.schedule(curTick);
1212}
1213
1214template <class Impl>
1215int
1216FullO3CPU<Impl>::getFreeTid()
1217{
1218 for (int i=0; i < numThreads; i++) {
1219 if (!tids[i]) {
1220 tids[i] = true;
1221 return i;
1222 }
1223 }
1224
1225 return -1;
1226}
1227
1228template <class Impl>
1229void
1230FullO3CPU<Impl>::doContextSwitch()
1231{
1232 if (contextSwitch) {
1233
1234 //ADD CODE TO DEACTIVE THREAD HERE (???)
1235
1236 for (int tid=0; tid < cpuWaitList.size(); tid++) {
1237 activateWhenReady(tid);
1238 }
1239
1240 if (cpuWaitList.size() == 0)
1241 contextSwitch = true;
1242 }
1243}
1244
1245template <class Impl>
1246void
1247FullO3CPU<Impl>::updateThreadPriority()
1248{
1249 if (activeThreads.size() > 1)
1250 {
1251 //DEFAULT TO ROUND ROBIN SCHEME
1252 //e.g. Move highest priority to end of thread list
1253 list<unsigned>::iterator list_begin = activeThreads.begin();
1254 list<unsigned>::iterator list_end = activeThreads.end();
1255
1256 unsigned high_thread = *list_begin;
1257
1258 activeThreads.erase(list_begin);
1259
1260 activeThreads.push_back(high_thread);
1261 }
1262}
1263
1264// Forward declaration of FullO3CPU.
1265template class FullO3CPU<O3CPUImpl>;
| 752 _status = SwitchedOut;
753 }
754 assert(switchCount <= 5);
755}
756
757template <class Impl>
758void
759FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
760{
761 // Flush out any old data from the time buffers.
762 for (int i = 0; i < 10; ++i) {
763 timeBuffer.advance();
764 fetchQueue.advance();
765 decodeQueue.advance();
766 renameQueue.advance();
767 iewQueue.advance();
768 }
769
770 activityRec.reset();
771
772 BaseCPU::takeOverFrom(oldCPU);
773
774 fetch.takeOverFrom();
775 decode.takeOverFrom();
776 rename.takeOverFrom();
777 iew.takeOverFrom();
778 commit.takeOverFrom();
779
780 assert(!tickEvent.scheduled());
781
782 // @todo: Figure out how to properly select the tid to put onto
783 // the active threads list.
784 int tid = 0;
785
786 list<unsigned>::iterator isActive = find(
787 activeThreads.begin(), activeThreads.end(), tid);
788
789 if (isActive == activeThreads.end()) {
790 //May Need to Re-code this if the delay variable is the delay
791 //needed for thread to activate
792 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n",
793 tid);
794
795 activeThreads.push_back(tid);
796 }
797
798 // Set all statuses to active, schedule the CPU's tick event.
799 // @todo: Fix up statuses so this is handled properly
800 for (int i = 0; i < threadContexts.size(); ++i) {
801 ThreadContext *tc = threadContexts[i];
802 if (tc->status() == ThreadContext::Active && _status != Running) {
803 _status = Running;
804 tickEvent.schedule(curTick);
805 }
806 }
807 if (!tickEvent.scheduled())
808 tickEvent.schedule(curTick);
809}
810
811template <class Impl>
812uint64_t
813FullO3CPU<Impl>::readIntReg(int reg_idx)
814{
815 return regFile.readIntReg(reg_idx);
816}
817
818template <class Impl>
819FloatReg
820FullO3CPU<Impl>::readFloatReg(int reg_idx, int width)
821{
822 return regFile.readFloatReg(reg_idx, width);
823}
824
825template <class Impl>
826FloatReg
827FullO3CPU<Impl>::readFloatReg(int reg_idx)
828{
829 return regFile.readFloatReg(reg_idx);
830}
831
832template <class Impl>
833FloatRegBits
834FullO3CPU<Impl>::readFloatRegBits(int reg_idx, int width)
835{
836 return regFile.readFloatRegBits(reg_idx, width);
837}
838
839template <class Impl>
840FloatRegBits
841FullO3CPU<Impl>::readFloatRegBits(int reg_idx)
842{
843 return regFile.readFloatRegBits(reg_idx);
844}
845
846template <class Impl>
847void
848FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val)
849{
850 regFile.setIntReg(reg_idx, val);
851}
852
853template <class Impl>
854void
855FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
856{
857 regFile.setFloatReg(reg_idx, val, width);
858}
859
860template <class Impl>
861void
862FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val)
863{
864 regFile.setFloatReg(reg_idx, val);
865}
866
867template <class Impl>
868void
869FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val, int width)
870{
871 regFile.setFloatRegBits(reg_idx, val, width);
872}
873
874template <class Impl>
875void
876FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
877{
878 regFile.setFloatRegBits(reg_idx, val);
879}
880
881template <class Impl>
882uint64_t
883FullO3CPU<Impl>::readArchIntReg(int reg_idx, unsigned tid)
884{
885 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
886
887 return regFile.readIntReg(phys_reg);
888}
889
890template <class Impl>
891float
892FullO3CPU<Impl>::readArchFloatRegSingle(int reg_idx, unsigned tid)
893{
894 int idx = reg_idx + TheISA::FP_Base_DepTag;
895 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
896
897 return regFile.readFloatReg(phys_reg);
898}
899
900template <class Impl>
901double
902FullO3CPU<Impl>::readArchFloatRegDouble(int reg_idx, unsigned tid)
903{
904 int idx = reg_idx + TheISA::FP_Base_DepTag;
905 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
906
907 return regFile.readFloatReg(phys_reg, 64);
908}
909
910template <class Impl>
911uint64_t
912FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, unsigned tid)
913{
914 int idx = reg_idx + TheISA::FP_Base_DepTag;
915 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx);
916
917 return regFile.readFloatRegBits(phys_reg);
918}
919
920template <class Impl>
921void
922FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, unsigned tid)
923{
924 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
925
926 regFile.setIntReg(phys_reg, val);
927}
928
929template <class Impl>
930void
931FullO3CPU<Impl>::setArchFloatRegSingle(int reg_idx, float val, unsigned tid)
932{
933 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
934
935 regFile.setFloatReg(phys_reg, val);
936}
937
938template <class Impl>
939void
940FullO3CPU<Impl>::setArchFloatRegDouble(int reg_idx, double val, unsigned tid)
941{
942 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
943
944 regFile.setFloatReg(phys_reg, val, 64);
945}
946
947template <class Impl>
948void
949FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, unsigned tid)
950{
951 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx);
952
953 regFile.setFloatRegBits(phys_reg, val);
954}
955
956template <class Impl>
957uint64_t
958FullO3CPU<Impl>::readPC(unsigned tid)
959{
960 return commit.readPC(tid);
961}
962
963template <class Impl>
964void
965FullO3CPU<Impl>::setPC(Addr new_PC,unsigned tid)
966{
967 commit.setPC(new_PC, tid);
968}
969
970template <class Impl>
971uint64_t
972FullO3CPU<Impl>::readNextPC(unsigned tid)
973{
974 return commit.readNextPC(tid);
975}
976
977template <class Impl>
978void
979FullO3CPU<Impl>::setNextPC(uint64_t val,unsigned tid)
980{
981 commit.setNextPC(val, tid);
982}
983
984#if THE_ISA != ALPHA_ISA
985template <class Impl>
986uint64_t
987FullO3CPU<Impl>::readNextNPC(unsigned tid)
988{
989 return commit.readNextNPC(tid);
990}
991
992template <class Impl>
993void
994FullO3CPU<Impl>::setNextNNPC(uint64_t val,unsigned tid)
995{
996 commit.setNextNPC(val, tid);
997}
998#endif
999
1000template <class Impl>
1001typename FullO3CPU<Impl>::ListIt
1002FullO3CPU<Impl>::addInst(DynInstPtr &inst)
1003{
1004 instList.push_back(inst);
1005
1006 return --(instList.end());
1007}
1008
1009template <class Impl>
1010void
1011FullO3CPU<Impl>::instDone(unsigned tid)
1012{
1013 // Keep an instruction count.
1014 thread[tid]->numInst++;
1015 thread[tid]->numInsts++;
1016 committedInsts[tid]++;
1017 totalCommittedInsts++;
1018
1019 // Check for instruction-count-based events.
1020 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst);
1021}
1022
1023template <class Impl>
1024void
1025FullO3CPU<Impl>::addToRemoveList(DynInstPtr &inst)
1026{
1027 removeInstsThisCycle = true;
1028
1029 removeList.push(inst->getInstListIt());
1030}
1031
1032template <class Impl>
1033void
1034FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst)
1035{
1036 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %#x "
1037 "[sn:%lli]\n",
1038 inst->threadNumber, inst->readPC(), inst->seqNum);
1039
1040 removeInstsThisCycle = true;
1041
1042 // Remove the front instruction.
1043 removeList.push(inst->getInstListIt());
1044}
1045
1046template <class Impl>
1047void
1048FullO3CPU<Impl>::removeInstsNotInROB(unsigned tid)
1049{
1050 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction"
1051 " list.\n", tid);
1052
1053 ListIt end_it;
1054
1055 bool rob_empty = false;
1056
1057 if (instList.empty()) {
1058 return;
1059 } else if (rob.isEmpty(/*tid*/)) {
1060 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n");
1061 end_it = instList.begin();
1062 rob_empty = true;
1063 } else {
1064 end_it = (rob.readTailInst(tid))->getInstListIt();
1065 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n");
1066 }
1067
1068 removeInstsThisCycle = true;
1069
1070 ListIt inst_it = instList.end();
1071
1072 inst_it--;
1073
1074 // Walk through the instruction list, removing any instructions
1075 // that were inserted after the given instruction iterator, end_it.
1076 while (inst_it != end_it) {
1077 assert(!instList.empty());
1078
1079 squashInstIt(inst_it, tid);
1080
1081 inst_it--;
1082 }
1083
1084 // If the ROB was empty, then we actually need to remove the first
1085 // instruction as well.
1086 if (rob_empty) {
1087 squashInstIt(inst_it, tid);
1088 }
1089}
1090
1091template <class Impl>
1092void
1093FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num,
1094 unsigned tid)
1095{
1096 assert(!instList.empty());
1097
1098 removeInstsThisCycle = true;
1099
1100 ListIt inst_iter = instList.end();
1101
1102 inst_iter--;
1103
1104 DPRINTF(O3CPU, "Deleting instructions from instruction "
1105 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n",
1106 tid, seq_num, (*inst_iter)->seqNum);
1107
1108 while ((*inst_iter)->seqNum > seq_num) {
1109
1110 bool break_loop = (inst_iter == instList.begin());
1111
1112 squashInstIt(inst_iter, tid);
1113
1114 inst_iter--;
1115
1116 if (break_loop)
1117 break;
1118 }
1119}
1120
1121template <class Impl>
1122inline void
1123FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, const unsigned &tid)
1124{
1125 if ((*instIt)->threadNumber == tid) {
1126 DPRINTF(O3CPU, "Squashing instruction, "
1127 "[tid:%i] [sn:%lli] PC %#x\n",
1128 (*instIt)->threadNumber,
1129 (*instIt)->seqNum,
1130 (*instIt)->readPC());
1131
1132 // Mark it as squashed.
1133 (*instIt)->setSquashed();
1134
1135 // @todo: Formulate a consistent method for deleting
1136 // instructions from the instruction list
1137 // Remove the instruction from the list.
1138 removeList.push(instIt);
1139 }
1140}
1141
1142template <class Impl>
1143void
1144FullO3CPU<Impl>::cleanUpRemovedInsts()
1145{
1146 while (!removeList.empty()) {
1147 DPRINTF(O3CPU, "Removing instruction, "
1148 "[tid:%i] [sn:%lli] PC %#x\n",
1149 (*removeList.front())->threadNumber,
1150 (*removeList.front())->seqNum,
1151 (*removeList.front())->readPC());
1152
1153 instList.erase(removeList.front());
1154
1155 removeList.pop();
1156 }
1157
1158 removeInstsThisCycle = false;
1159}
1160/*
1161template <class Impl>
1162void
1163FullO3CPU<Impl>::removeAllInsts()
1164{
1165 instList.clear();
1166}
1167*/
1168template <class Impl>
1169void
1170FullO3CPU<Impl>::dumpInsts()
1171{
1172 int num = 0;
1173
1174 ListIt inst_list_it = instList.begin();
1175
1176 cprintf("Dumping Instruction List\n");
1177
1178 while (inst_list_it != instList.end()) {
1179 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n"
1180 "Squashed:%i\n\n",
1181 num, (*inst_list_it)->readPC(), (*inst_list_it)->threadNumber,
1182 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(),
1183 (*inst_list_it)->isSquashed());
1184 inst_list_it++;
1185 ++num;
1186 }
1187}
1188/*
1189template <class Impl>
1190void
1191FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst)
1192{
1193 iew.wakeDependents(inst);
1194}
1195*/
1196template <class Impl>
1197void
1198FullO3CPU<Impl>::wakeCPU()
1199{
1200 if (activityRec.active() || tickEvent.scheduled()) {
1201 DPRINTF(Activity, "CPU already running.\n");
1202 return;
1203 }
1204
1205 DPRINTF(Activity, "Waking up CPU\n");
1206
1207 idleCycles += (curTick - 1) - lastRunningCycle;
1208
1209 tickEvent.schedule(curTick);
1210}
1211
1212template <class Impl>
1213int
1214FullO3CPU<Impl>::getFreeTid()
1215{
1216 for (int i=0; i < numThreads; i++) {
1217 if (!tids[i]) {
1218 tids[i] = true;
1219 return i;
1220 }
1221 }
1222
1223 return -1;
1224}
1225
1226template <class Impl>
1227void
1228FullO3CPU<Impl>::doContextSwitch()
1229{
1230 if (contextSwitch) {
1231
1232 //ADD CODE TO DEACTIVE THREAD HERE (???)
1233
1234 for (int tid=0; tid < cpuWaitList.size(); tid++) {
1235 activateWhenReady(tid);
1236 }
1237
1238 if (cpuWaitList.size() == 0)
1239 contextSwitch = true;
1240 }
1241}
1242
1243template <class Impl>
1244void
1245FullO3CPU<Impl>::updateThreadPriority()
1246{
1247 if (activeThreads.size() > 1)
1248 {
1249 //DEFAULT TO ROUND ROBIN SCHEME
1250 //e.g. Move highest priority to end of thread list
1251 list<unsigned>::iterator list_begin = activeThreads.begin();
1252 list<unsigned>::iterator list_end = activeThreads.end();
1253
1254 unsigned high_thread = *list_begin;
1255
1256 activeThreads.erase(list_begin);
1257
1258 activeThreads.push_back(high_thread);
1259 }
1260}
1261
1262// Forward declaration of FullO3CPU.
1263template class FullO3CPU<O3CPUImpl>;
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