cpu.cc revision 10225
1/* 2 * Copyright (c) 2011-2012 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 block in ownership state 96 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 97 fetch->processCacheCompletion(pkt); 98 99 return true; 100} 101 102template<class Impl> 103void 104FullO3CPU<Impl>::IcachePort::recvRetry() 105{ 106 fetch->recvRetry(); 107} 108 109template <class Impl> 110bool 111FullO3CPU<Impl>::DcachePort::recvTimingResp(PacketPtr pkt) 112{ 113 return lsq->recvTimingResp(pkt); 114} 115 116template <class Impl> 117void 118FullO3CPU<Impl>::DcachePort::recvTimingSnoopReq(PacketPtr pkt) 119{ 120 lsq->recvTimingSnoopReq(pkt); 121} 122 123template <class Impl> 124void 125FullO3CPU<Impl>::DcachePort::recvRetry() 126{ 127 lsq->recvRetry(); 128} 129 130template <class Impl> 131FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c) 132 : Event(CPU_Tick_Pri), cpu(c) 133{ 134} 135 136template <class Impl> 137void 138FullO3CPU<Impl>::TickEvent::process() 139{ 140 cpu->tick(); 141} 142 143template <class Impl> 144const char * 145FullO3CPU<Impl>::TickEvent::description() const 146{ 147 return "FullO3CPU tick"; 148} 149 150template <class Impl> 151FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent() 152 : Event(CPU_Switch_Pri) 153{ 154} 155 156template <class Impl> 157void 158FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num, 159 FullO3CPU<Impl> *thread_cpu) 160{ 161 tid = thread_num; 162 cpu = thread_cpu; 163} 164 165template <class Impl> 166void 167FullO3CPU<Impl>::ActivateThreadEvent::process() 168{ 169 cpu->activateThread(tid); 170} 171 172template <class Impl> 173const char * 174FullO3CPU<Impl>::ActivateThreadEvent::description() const 175{ 176 return "FullO3CPU \"Activate Thread\""; 177} 178 179template <class Impl> 180FullO3CPU<Impl>::DeallocateContextEvent::DeallocateContextEvent() 181 : Event(CPU_Tick_Pri), tid(0), remove(false), cpu(NULL) 182{ 183} 184 185template <class Impl> 186void 187FullO3CPU<Impl>::DeallocateContextEvent::init(int thread_num, 188 FullO3CPU<Impl> *thread_cpu) 189{ 190 tid = thread_num; 191 cpu = thread_cpu; 192 remove = false; 193} 194 195template <class Impl> 196void 197FullO3CPU<Impl>::DeallocateContextEvent::process() 198{ 199 cpu->deactivateThread(tid); 200 if (remove) 201 cpu->removeThread(tid); 202} 203 204template <class Impl> 205const char * 206FullO3CPU<Impl>::DeallocateContextEvent::description() const 207{ 208 return "FullO3CPU \"Deallocate Context\""; 209} 210 211template <class Impl> 212FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params) 213 : BaseO3CPU(params), 214 itb(params->itb), 215 dtb(params->dtb), 216 tickEvent(this), 217#ifndef NDEBUG 218 instcount(0), 219#endif 220 removeInstsThisCycle(false), 221 fetch(this, params), 222 decode(this, params), 223 rename(this, params), 224 iew(this, params), 225 commit(this, params), 226 227 regFile(params->numPhysIntRegs, 228 params->numPhysFloatRegs, 229 params->numPhysCCRegs), 230 231 freeList(name() + ".freelist", ®File), 232 233 rob(this, params), 234 235 scoreboard(name() + ".scoreboard", 236 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs, 237 TheISA::ZeroReg, TheISA::ZeroReg), 238 239 isa(numThreads, NULL), 240 241 icachePort(&fetch, this), 242 dcachePort(&iew.ldstQueue, this), 243 244 timeBuffer(params->backComSize, params->forwardComSize), 245 fetchQueue(params->backComSize, params->forwardComSize), 246 decodeQueue(params->backComSize, params->forwardComSize), 247 renameQueue(params->backComSize, params->forwardComSize), 248 iewQueue(params->backComSize, params->forwardComSize), 249 activityRec(name(), NumStages, 250 params->backComSize + params->forwardComSize, 251 params->activity), 252 253 globalSeqNum(1), 254 system(params->system), 255 drainManager(NULL), 256 lastRunningCycle(curCycle()) 257{ 258 if (!params->switched_out) { 259 _status = Running; 260 } else { 261 _status = SwitchedOut; 262 } 263 264 if (params->checker) { 265 BaseCPU *temp_checker = params->checker; 266 checker = dynamic_cast<Checker<Impl> *>(temp_checker); 267 checker->setIcachePort(&icachePort); 268 checker->setSystem(params->system); 269 } else { 270 checker = NULL; 271 } 272 273 if (!FullSystem) { 274 thread.resize(numThreads); 275 tids.resize(numThreads); 276 } 277 278 // The stages also need their CPU pointer setup. However this 279 // must be done at the upper level CPU because they have pointers 280 // to the upper level CPU, and not this FullO3CPU. 281 282 // Set up Pointers to the activeThreads list for each stage 283 fetch.setActiveThreads(&activeThreads); 284 decode.setActiveThreads(&activeThreads); 285 rename.setActiveThreads(&activeThreads); 286 iew.setActiveThreads(&activeThreads); 287 commit.setActiveThreads(&activeThreads); 288 289 // Give each of the stages the time buffer they will use. 290 fetch.setTimeBuffer(&timeBuffer); 291 decode.setTimeBuffer(&timeBuffer); 292 rename.setTimeBuffer(&timeBuffer); 293 iew.setTimeBuffer(&timeBuffer); 294 commit.setTimeBuffer(&timeBuffer); 295 296 // Also setup each of the stages' queues. 297 fetch.setFetchQueue(&fetchQueue); 298 decode.setFetchQueue(&fetchQueue); 299 commit.setFetchQueue(&fetchQueue); 300 decode.setDecodeQueue(&decodeQueue); 301 rename.setDecodeQueue(&decodeQueue); 302 rename.setRenameQueue(&renameQueue); 303 iew.setRenameQueue(&renameQueue); 304 iew.setIEWQueue(&iewQueue); 305 commit.setIEWQueue(&iewQueue); 306 commit.setRenameQueue(&renameQueue); 307 308 commit.setIEWStage(&iew); 309 rename.setIEWStage(&iew); 310 rename.setCommitStage(&commit); 311 312 ThreadID active_threads; 313 if (FullSystem) { 314 active_threads = 1; 315 } else { 316 active_threads = params->workload.size(); 317 318 if (active_threads > Impl::MaxThreads) { 319 panic("Workload Size too large. Increase the 'MaxThreads' " 320 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) " 321 "or edit your workload size."); 322 } 323 } 324 325 //Make Sure That this a Valid Architeture 326 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs); 327 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs); 328 assert(params->numPhysCCRegs >= numThreads * TheISA::NumCCRegs); 329 330 rename.setScoreboard(&scoreboard); 331 iew.setScoreboard(&scoreboard); 332 333 // Setup the rename map for whichever stages need it. 334 for (ThreadID tid = 0; tid < numThreads; tid++) { 335 isa[tid] = params->isa[tid]; 336 337 // Only Alpha has an FP zero register, so for other ISAs we 338 // use an invalid FP register index to avoid special treatment 339 // of any valid FP reg. 340 RegIndex invalidFPReg = TheISA::NumFloatRegs + 1; 341 RegIndex fpZeroReg = 342 (THE_ISA == ALPHA_ISA) ? TheISA::ZeroReg : invalidFPReg; 343 344 commitRenameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg, 345 &freeList); 346 347 renameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg, 348 &freeList); 349 350 activateThreadEvent[tid].init(tid, this); 351 deallocateContextEvent[tid].init(tid, this); 352 } 353 354 // Initialize rename map to assign physical registers to the 355 // architectural registers for active threads only. 356 for (ThreadID tid = 0; tid < active_threads; tid++) { 357 for (RegIndex ridx = 0; ridx < TheISA::NumIntRegs; ++ridx) { 358 // Note that we can't use the rename() method because we don't 359 // want special treatment for the zero register at this point 360 PhysRegIndex phys_reg = freeList.getIntReg(); 361 renameMap[tid].setIntEntry(ridx, phys_reg); 362 commitRenameMap[tid].setIntEntry(ridx, phys_reg); 363 } 364 365 for (RegIndex ridx = 0; ridx < TheISA::NumFloatRegs; ++ridx) { 366 PhysRegIndex phys_reg = freeList.getFloatReg(); 367 renameMap[tid].setFloatEntry(ridx, phys_reg); 368 commitRenameMap[tid].setFloatEntry(ridx, phys_reg); 369 } 370 371 for (RegIndex ridx = 0; ridx < TheISA::NumCCRegs; ++ridx) { 372 PhysRegIndex phys_reg = freeList.getCCReg(); 373 renameMap[tid].setCCEntry(ridx, phys_reg); 374 commitRenameMap[tid].setCCEntry(ridx, phys_reg); 375 } 376 } 377 378 rename.setRenameMap(renameMap); 379 commit.setRenameMap(commitRenameMap); 380 rename.setFreeList(&freeList); 381 382 // Setup the ROB for whichever stages need it. 383 commit.setROB(&rob); 384 385 lastActivatedCycle = 0; 386#if 0 387 // Give renameMap & rename stage access to the freeList; 388 for (ThreadID tid = 0; tid < numThreads; tid++) 389 globalSeqNum[tid] = 1; 390#endif 391 392 contextSwitch = false; 393 DPRINTF(O3CPU, "Creating O3CPU object.\n"); 394 395 // Setup any thread state. 396 this->thread.resize(this->numThreads); 397 398 for (ThreadID tid = 0; tid < this->numThreads; ++tid) { 399 if (FullSystem) { 400 // SMT is not supported in FS mode yet. 401 assert(this->numThreads == 1); 402 this->thread[tid] = new Thread(this, 0, NULL); 403 } else { 404 if (tid < params->workload.size()) { 405 DPRINTF(O3CPU, "Workload[%i] process is %#x", 406 tid, this->thread[tid]); 407 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 408 (typename Impl::O3CPU *)(this), 409 tid, params->workload[tid]); 410 411 //usedTids[tid] = true; 412 //threadMap[tid] = tid; 413 } else { 414 //Allocate Empty thread so M5 can use later 415 //when scheduling threads to CPU 416 Process* dummy_proc = NULL; 417 418 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 419 (typename Impl::O3CPU *)(this), 420 tid, dummy_proc); 421 //usedTids[tid] = false; 422 } 423 } 424 425 ThreadContext *tc; 426 427 // Setup the TC that will serve as the interface to the threads/CPU. 428 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>; 429 430 tc = o3_tc; 431 432 // If we're using a checker, then the TC should be the 433 // CheckerThreadContext. 434 if (params->checker) { 435 tc = new CheckerThreadContext<O3ThreadContext<Impl> >( 436 o3_tc, this->checker); 437 } 438 439 o3_tc->cpu = (typename Impl::O3CPU *)(this); 440 assert(o3_tc->cpu); 441 o3_tc->thread = this->thread[tid]; 442 443 if (FullSystem) { 444 // Setup quiesce event. 445 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc); 446 } 447 // Give the thread the TC. 448 this->thread[tid]->tc = tc; 449 450 // Add the TC to the CPU's list of TC's. 451 this->threadContexts.push_back(tc); 452 } 453 454 // FullO3CPU always requires an interrupt controller. 455 if (!params->switched_out && !interrupts) { 456 fatal("FullO3CPU %s has no interrupt controller.\n" 457 "Ensure createInterruptController() is called.\n", name()); 458 } 459 460 for (ThreadID tid = 0; tid < this->numThreads; tid++) 461 this->thread[tid]->setFuncExeInst(0); 462} 463 464template <class Impl> 465FullO3CPU<Impl>::~FullO3CPU() 466{ 467} 468 469template <class Impl> 470void 471FullO3CPU<Impl>::regProbePoints() 472{ 473 ppInstAccessComplete = new ProbePointArg<PacketPtr>(getProbeManager(), "InstAccessComplete"); 474 ppDataAccessComplete = new ProbePointArg<std::pair<DynInstPtr, PacketPtr> >(getProbeManager(), "DataAccessComplete"); 475 fetch.regProbePoints(); 476 iew.regProbePoints(); 477 commit.regProbePoints(); 478} 479 480template <class Impl> 481void 482FullO3CPU<Impl>::regStats() 483{ 484 BaseO3CPU::regStats(); 485 486 // Register any of the O3CPU's stats here. 487 timesIdled 488 .name(name() + ".timesIdled") 489 .desc("Number of times that the entire CPU went into an idle state and" 490 " unscheduled itself") 491 .prereq(timesIdled); 492 493 idleCycles 494 .name(name() + ".idleCycles") 495 .desc("Total number of cycles that the CPU has spent unscheduled due " 496 "to idling") 497 .prereq(idleCycles); 498 499 quiesceCycles 500 .name(name() + ".quiesceCycles") 501 .desc("Total number of cycles that CPU has spent quiesced or waiting " 502 "for an interrupt") 503 .prereq(quiesceCycles); 504 505 // Number of Instructions simulated 506 // -------------------------------- 507 // Should probably be in Base CPU but need templated 508 // MaxThreads so put in here instead 509 committedInsts 510 .init(numThreads) 511 .name(name() + ".committedInsts") 512 .desc("Number of Instructions Simulated") 513 .flags(Stats::total); 514 515 committedOps 516 .init(numThreads) 517 .name(name() + ".committedOps") 518 .desc("Number of Ops (including micro ops) Simulated") 519 .flags(Stats::total); 520 521 cpi 522 .name(name() + ".cpi") 523 .desc("CPI: Cycles Per Instruction") 524 .precision(6); 525 cpi = numCycles / committedInsts; 526 527 totalCpi 528 .name(name() + ".cpi_total") 529 .desc("CPI: Total CPI of All Threads") 530 .precision(6); 531 totalCpi = numCycles / sum(committedInsts); 532 533 ipc 534 .name(name() + ".ipc") 535 .desc("IPC: Instructions Per Cycle") 536 .precision(6); 537 ipc = committedInsts / numCycles; 538 539 totalIpc 540 .name(name() + ".ipc_total") 541 .desc("IPC: Total IPC of All Threads") 542 .precision(6); 543 totalIpc = sum(committedInsts) / numCycles; 544 545 this->fetch.regStats(); 546 this->decode.regStats(); 547 this->rename.regStats(); 548 this->iew.regStats(); 549 this->commit.regStats(); 550 this->rob.regStats(); 551 552 intRegfileReads 553 .name(name() + ".int_regfile_reads") 554 .desc("number of integer regfile reads") 555 .prereq(intRegfileReads); 556 557 intRegfileWrites 558 .name(name() + ".int_regfile_writes") 559 .desc("number of integer regfile writes") 560 .prereq(intRegfileWrites); 561 562 fpRegfileReads 563 .name(name() + ".fp_regfile_reads") 564 .desc("number of floating regfile reads") 565 .prereq(fpRegfileReads); 566 567 fpRegfileWrites 568 .name(name() + ".fp_regfile_writes") 569 .desc("number of floating regfile writes") 570 .prereq(fpRegfileWrites); 571 572 ccRegfileReads 573 .name(name() + ".cc_regfile_reads") 574 .desc("number of cc regfile reads") 575 .prereq(ccRegfileReads); 576 577 ccRegfileWrites 578 .name(name() + ".cc_regfile_writes") 579 .desc("number of cc regfile writes") 580 .prereq(ccRegfileWrites); 581 582 miscRegfileReads 583 .name(name() + ".misc_regfile_reads") 584 .desc("number of misc regfile reads") 585 .prereq(miscRegfileReads); 586 587 miscRegfileWrites 588 .name(name() + ".misc_regfile_writes") 589 .desc("number of misc regfile writes") 590 .prereq(miscRegfileWrites); 591} 592 593template <class Impl> 594void 595FullO3CPU<Impl>::tick() 596{ 597 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n"); 598 assert(!switchedOut()); 599 assert(getDrainState() != Drainable::Drained); 600 601 ++numCycles; 602 603// activity = false; 604 605 //Tick each of the stages 606 fetch.tick(); 607 608 decode.tick(); 609 610 rename.tick(); 611 612 iew.tick(); 613 614 commit.tick(); 615 616 if (!FullSystem) 617 doContextSwitch(); 618 619 // Now advance the time buffers 620 timeBuffer.advance(); 621 622 fetchQueue.advance(); 623 decodeQueue.advance(); 624 renameQueue.advance(); 625 iewQueue.advance(); 626 627 activityRec.advance(); 628 629 if (removeInstsThisCycle) { 630 cleanUpRemovedInsts(); 631 } 632 633 if (!tickEvent.scheduled()) { 634 if (_status == SwitchedOut) { 635 DPRINTF(O3CPU, "Switched out!\n"); 636 // increment stat 637 lastRunningCycle = curCycle(); 638 } else if (!activityRec.active() || _status == Idle) { 639 DPRINTF(O3CPU, "Idle!\n"); 640 lastRunningCycle = curCycle(); 641 timesIdled++; 642 } else { 643 schedule(tickEvent, clockEdge(Cycles(1))); 644 DPRINTF(O3CPU, "Scheduling next tick!\n"); 645 } 646 } 647 648 if (!FullSystem) 649 updateThreadPriority(); 650 651 tryDrain(); 652} 653 654template <class Impl> 655void 656FullO3CPU<Impl>::init() 657{ 658 BaseCPU::init(); 659 660 for (ThreadID tid = 0; tid < numThreads; ++tid) { 661 // Set noSquashFromTC so that the CPU doesn't squash when initially 662 // setting up registers. 663 thread[tid]->noSquashFromTC = true; 664 // Initialise the ThreadContext's memory proxies 665 thread[tid]->initMemProxies(thread[tid]->getTC()); 666 } 667 668 if (FullSystem && !params()->switched_out) { 669 for (ThreadID tid = 0; tid < numThreads; tid++) { 670 ThreadContext *src_tc = threadContexts[tid]; 671 TheISA::initCPU(src_tc, src_tc->contextId()); 672 } 673 } 674 675 // Clear noSquashFromTC. 676 for (int tid = 0; tid < numThreads; ++tid) 677 thread[tid]->noSquashFromTC = false; 678 679 commit.setThreads(thread); 680} 681 682template <class Impl> 683void 684FullO3CPU<Impl>::startup() 685{ 686 BaseCPU::startup(); 687 for (int tid = 0; tid < numThreads; ++tid) 688 isa[tid]->startup(threadContexts[tid]); 689 690 fetch.startupStage(); 691 decode.startupStage(); 692 iew.startupStage(); 693 rename.startupStage(); 694 commit.startupStage(); 695} 696 697template <class Impl> 698void 699FullO3CPU<Impl>::activateThread(ThreadID tid) 700{ 701 list<ThreadID>::iterator isActive = 702 std::find(activeThreads.begin(), activeThreads.end(), tid); 703 704 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid); 705 assert(!switchedOut()); 706 707 if (isActive == activeThreads.end()) { 708 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n", 709 tid); 710 711 activeThreads.push_back(tid); 712 } 713} 714 715template <class Impl> 716void 717FullO3CPU<Impl>::deactivateThread(ThreadID tid) 718{ 719 //Remove From Active List, if Active 720 list<ThreadID>::iterator thread_it = 721 std::find(activeThreads.begin(), activeThreads.end(), tid); 722 723 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid); 724 assert(!switchedOut()); 725 726 if (thread_it != activeThreads.end()) { 727 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n", 728 tid); 729 activeThreads.erase(thread_it); 730 } 731} 732 733template <class Impl> 734Counter 735FullO3CPU<Impl>::totalInsts() const 736{ 737 Counter total(0); 738 739 ThreadID size = thread.size(); 740 for (ThreadID i = 0; i < size; i++) 741 total += thread[i]->numInst; 742 743 return total; 744} 745 746template <class Impl> 747Counter 748FullO3CPU<Impl>::totalOps() const 749{ 750 Counter total(0); 751 752 ThreadID size = thread.size(); 753 for (ThreadID i = 0; i < size; i++) 754 total += thread[i]->numOp; 755 756 return total; 757} 758 759template <class Impl> 760void 761FullO3CPU<Impl>::activateContext(ThreadID tid, Cycles delay) 762{ 763 assert(!switchedOut()); 764 765 // Needs to set each stage to running as well. 766 if (delay){ 767 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate " 768 "on cycle %d\n", tid, clockEdge(delay)); 769 scheduleActivateThreadEvent(tid, delay); 770 } else { 771 activateThread(tid); 772 } 773 774 // We don't want to wake the CPU if it is drained. In that case, 775 // we just want to flag the thread as active and schedule the tick 776 // event from drainResume() instead. 777 if (getDrainState() == Drainable::Drained) 778 return; 779 780 // If we are time 0 or if the last activation time is in the past, 781 // schedule the next tick and wake up the fetch unit 782 if (lastActivatedCycle == 0 || lastActivatedCycle < curTick()) { 783 scheduleTickEvent(delay); 784 785 // Be sure to signal that there's some activity so the CPU doesn't 786 // deschedule itself. 787 activityRec.activity(); 788 fetch.wakeFromQuiesce(); 789 790 Cycles cycles(curCycle() - lastRunningCycle); 791 // @todo: This is an oddity that is only here to match the stats 792 if (cycles != 0) 793 --cycles; 794 quiesceCycles += cycles; 795 796 lastActivatedCycle = curTick(); 797 798 _status = Running; 799 } 800} 801 802template <class Impl> 803bool 804FullO3CPU<Impl>::scheduleDeallocateContext(ThreadID tid, bool remove, 805 Cycles delay) 806{ 807 // Schedule removal of thread data from CPU 808 if (delay){ 809 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate " 810 "on tick %d\n", tid, clockEdge(delay)); 811 scheduleDeallocateContextEvent(tid, remove, delay); 812 return false; 813 } else { 814 deactivateThread(tid); 815 if (remove) 816 removeThread(tid); 817 return true; 818 } 819} 820 821template <class Impl> 822void 823FullO3CPU<Impl>::suspendContext(ThreadID tid) 824{ 825 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid); 826 assert(!switchedOut()); 827 bool deallocated = scheduleDeallocateContext(tid, false, Cycles(1)); 828 // If this was the last thread then unschedule the tick event. 829 if ((activeThreads.size() == 1 && !deallocated) || 830 activeThreads.size() == 0) 831 unscheduleTickEvent(); 832 833 DPRINTF(Quiesce, "Suspending Context\n"); 834 lastRunningCycle = curCycle(); 835 _status = Idle; 836} 837 838template <class Impl> 839void 840FullO3CPU<Impl>::haltContext(ThreadID tid) 841{ 842 //For now, this is the same as deallocate 843 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid); 844 assert(!switchedOut()); 845 scheduleDeallocateContext(tid, true, Cycles(1)); 846} 847 848template <class Impl> 849void 850FullO3CPU<Impl>::insertThread(ThreadID tid) 851{ 852 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU"); 853 // Will change now that the PC and thread state is internal to the CPU 854 // and not in the ThreadContext. 855 ThreadContext *src_tc; 856 if (FullSystem) 857 src_tc = system->threadContexts[tid]; 858 else 859 src_tc = tcBase(tid); 860 861 //Bind Int Regs to Rename Map 862 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 863 PhysRegIndex phys_reg = freeList.getIntReg(); 864 865 renameMap[tid].setEntry(ireg,phys_reg); 866 scoreboard.setReg(phys_reg); 867 } 868 869 //Bind Float Regs to Rename Map 870 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 871 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) { 872 PhysRegIndex phys_reg = freeList.getFloatReg(); 873 874 renameMap[tid].setEntry(freg,phys_reg); 875 scoreboard.setReg(phys_reg); 876 } 877 878 //Bind condition-code Regs to Rename Map 879 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs; 880 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 881 creg < max_reg; creg++) { 882 PhysRegIndex phys_reg = freeList.getCCReg(); 883 884 renameMap[tid].setEntry(creg,phys_reg); 885 scoreboard.setReg(phys_reg); 886 } 887 888 //Copy Thread Data Into RegFile 889 //this->copyFromTC(tid); 890 891 //Set PC/NPC/NNPC 892 pcState(src_tc->pcState(), tid); 893 894 src_tc->setStatus(ThreadContext::Active); 895 896 activateContext(tid, Cycles(1)); 897 898 //Reset ROB/IQ/LSQ Entries 899 commit.rob->resetEntries(); 900 iew.resetEntries(); 901} 902 903template <class Impl> 904void 905FullO3CPU<Impl>::removeThread(ThreadID tid) 906{ 907 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid); 908 909 // Copy Thread Data From RegFile 910 // If thread is suspended, it might be re-allocated 911 // this->copyToTC(tid); 912 913 914 // @todo: 2-27-2008: Fix how we free up rename mappings 915 // here to alleviate the case for double-freeing registers 916 // in SMT workloads. 917 918 // Unbind Int Regs from Rename Map 919 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 920 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg); 921 922 scoreboard.unsetReg(phys_reg); 923 freeList.addReg(phys_reg); 924 } 925 926 // Unbind Float Regs from Rename Map 927 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 928 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) { 929 PhysRegIndex phys_reg = renameMap[tid].lookup(freg); 930 931 scoreboard.unsetReg(phys_reg); 932 freeList.addReg(phys_reg); 933 } 934 935 // Unbind condition-code Regs from Rename Map 936 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs; 937 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 938 creg < max_reg; creg++) { 939 PhysRegIndex phys_reg = renameMap[tid].lookup(creg); 940 941 scoreboard.unsetReg(phys_reg); 942 freeList.addReg(phys_reg); 943 } 944 945 // Squash Throughout Pipeline 946 DynInstPtr inst = commit.rob->readHeadInst(tid); 947 InstSeqNum squash_seq_num = inst->seqNum; 948 fetch.squash(0, squash_seq_num, inst, tid); 949 decode.squash(tid); 950 rename.squash(squash_seq_num, tid); 951 iew.squash(tid); 952 iew.ldstQueue.squash(squash_seq_num, tid); 953 commit.rob->squash(squash_seq_num, tid); 954 955 956 assert(iew.instQueue.getCount(tid) == 0); 957 assert(iew.ldstQueue.getCount(tid) == 0); 958 959 // Reset ROB/IQ/LSQ Entries 960 961 // Commented out for now. This should be possible to do by 962 // telling all the pipeline stages to drain first, and then 963 // checking until the drain completes. Once the pipeline is 964 // drained, call resetEntries(). - 10-09-06 ktlim 965/* 966 if (activeThreads.size() >= 1) { 967 commit.rob->resetEntries(); 968 iew.resetEntries(); 969 } 970*/ 971} 972 973 974template <class Impl> 975void 976FullO3CPU<Impl>::activateWhenReady(ThreadID tid) 977{ 978 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming" 979 "(e.g. PhysRegs/ROB/IQ/LSQ) \n", 980 tid); 981 982 bool ready = true; 983 984 // Should these all be '<' not '>='? This seems backwards... 985 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) { 986 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 987 "Phys. Int. Regs.\n", 988 tid); 989 ready = false; 990 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) { 991 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 992 "Phys. Float. Regs.\n", 993 tid); 994 ready = false; 995 } else if (freeList.numFreeCCRegs() >= TheISA::NumCCRegs) { 996 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 997 "Phys. CC. Regs.\n", 998 tid); 999 ready = false; 1000 } else if (commit.rob->numFreeEntries() >= 1001 commit.rob->entryAmount(activeThreads.size() + 1)) { 1002 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 1003 "ROB entries.\n", 1004 tid); 1005 ready = false; 1006 } else if (iew.instQueue.numFreeEntries() >= 1007 iew.instQueue.entryAmount(activeThreads.size() + 1)) { 1008 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 1009 "IQ entries.\n", 1010 tid); 1011 ready = false; 1012 } else if (iew.ldstQueue.numFreeEntries() >= 1013 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) { 1014 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 1015 "LSQ entries.\n", 1016 tid); 1017 ready = false; 1018 } 1019 1020 if (ready) { 1021 insertThread(tid); 1022 1023 contextSwitch = false; 1024 1025 cpuWaitList.remove(tid); 1026 } else { 1027 suspendContext(tid); 1028 1029 //blocks fetch 1030 contextSwitch = true; 1031 1032 //@todo: dont always add to waitlist 1033 //do waitlist 1034 cpuWaitList.push_back(tid); 1035 } 1036} 1037 1038template <class Impl> 1039Fault 1040FullO3CPU<Impl>::hwrei(ThreadID tid) 1041{ 1042#if THE_ISA == ALPHA_ISA 1043 // Need to clear the lock flag upon returning from an interrupt. 1044 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid); 1045 1046 this->thread[tid]->kernelStats->hwrei(); 1047 1048 // FIXME: XXX check for interrupts? XXX 1049#endif 1050 return NoFault; 1051} 1052 1053template <class Impl> 1054bool 1055FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid) 1056{ 1057#if THE_ISA == ALPHA_ISA 1058 if (this->thread[tid]->kernelStats) 1059 this->thread[tid]->kernelStats->callpal(palFunc, 1060 this->threadContexts[tid]); 1061 1062 switch (palFunc) { 1063 case PAL::halt: 1064 halt(); 1065 if (--System::numSystemsRunning == 0) 1066 exitSimLoop("all cpus halted"); 1067 break; 1068 1069 case PAL::bpt: 1070 case PAL::bugchk: 1071 if (this->system->breakpoint()) 1072 return false; 1073 break; 1074 } 1075#endif 1076 return true; 1077} 1078 1079template <class Impl> 1080Fault 1081FullO3CPU<Impl>::getInterrupts() 1082{ 1083 // Check if there are any outstanding interrupts 1084 return this->interrupts->getInterrupt(this->threadContexts[0]); 1085} 1086 1087template <class Impl> 1088void 1089FullO3CPU<Impl>::processInterrupts(Fault interrupt) 1090{ 1091 // Check for interrupts here. For now can copy the code that 1092 // exists within isa_fullsys_traits.hh. Also assume that thread 0 1093 // is the one that handles the interrupts. 1094 // @todo: Possibly consolidate the interrupt checking code. 1095 // @todo: Allow other threads to handle interrupts. 1096 1097 assert(interrupt != NoFault); 1098 this->interrupts->updateIntrInfo(this->threadContexts[0]); 1099 1100 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name()); 1101 this->trap(interrupt, 0, NULL); 1102} 1103 1104template <class Impl> 1105void 1106FullO3CPU<Impl>::trap(Fault fault, ThreadID tid, StaticInstPtr inst) 1107{ 1108 // Pass the thread's TC into the invoke method. 1109 fault->invoke(this->threadContexts[tid], inst); 1110} 1111 1112template <class Impl> 1113void 1114FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid) 1115{ 1116 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid); 1117 1118 DPRINTF(Activity,"Activity: syscall() called.\n"); 1119 1120 // Temporarily increase this by one to account for the syscall 1121 // instruction. 1122 ++(this->thread[tid]->funcExeInst); 1123 1124 // Execute the actual syscall. 1125 this->thread[tid]->syscall(callnum); 1126 1127 // Decrease funcExeInst by one as the normal commit will handle 1128 // incrementing it. 1129 --(this->thread[tid]->funcExeInst); 1130} 1131 1132template <class Impl> 1133void 1134FullO3CPU<Impl>::serializeThread(std::ostream &os, ThreadID tid) 1135{ 1136 thread[tid]->serialize(os); 1137} 1138 1139template <class Impl> 1140void 1141FullO3CPU<Impl>::unserializeThread(Checkpoint *cp, const std::string §ion, 1142 ThreadID tid) 1143{ 1144 thread[tid]->unserialize(cp, section); 1145} 1146 1147template <class Impl> 1148unsigned int 1149FullO3CPU<Impl>::drain(DrainManager *drain_manager) 1150{ 1151 // If the CPU isn't doing anything, then return immediately. 1152 if (switchedOut()) { 1153 setDrainState(Drainable::Drained); 1154 return 0; 1155 } 1156 1157 DPRINTF(Drain, "Draining...\n"); 1158 setDrainState(Drainable::Draining); 1159 1160 // We only need to signal a drain to the commit stage as this 1161 // initiates squashing controls the draining. Once the commit 1162 // stage commits an instruction where it is safe to stop, it'll 1163 // squash the rest of the instructions in the pipeline and force 1164 // the fetch stage to stall. The pipeline will be drained once all 1165 // in-flight instructions have retired. 1166 commit.drain(); 1167 1168 // Wake the CPU and record activity so everything can drain out if 1169 // the CPU was not able to immediately drain. 1170 if (!isDrained()) { 1171 drainManager = drain_manager; 1172 1173 wakeCPU(); 1174 activityRec.activity(); 1175 1176 DPRINTF(Drain, "CPU not drained\n"); 1177 1178 return 1; 1179 } else { 1180 setDrainState(Drainable::Drained); 1181 DPRINTF(Drain, "CPU is already drained\n"); 1182 if (tickEvent.scheduled()) 1183 deschedule(tickEvent); 1184 1185 // Flush out any old data from the time buffers. In 1186 // particular, there might be some data in flight from the 1187 // fetch stage that isn't visible in any of the CPU buffers we 1188 // test in isDrained(). 1189 for (int i = 0; i < timeBuffer.getSize(); ++i) { 1190 timeBuffer.advance(); 1191 fetchQueue.advance(); 1192 decodeQueue.advance(); 1193 renameQueue.advance(); 1194 iewQueue.advance(); 1195 } 1196 1197 drainSanityCheck(); 1198 return 0; 1199 } 1200} 1201 1202template <class Impl> 1203bool 1204FullO3CPU<Impl>::tryDrain() 1205{ 1206 if (!drainManager || !isDrained()) 1207 return false; 1208 1209 if (tickEvent.scheduled()) 1210 deschedule(tickEvent); 1211 1212 DPRINTF(Drain, "CPU done draining, processing drain event\n"); 1213 drainManager->signalDrainDone(); 1214 drainManager = NULL; 1215 1216 return true; 1217} 1218 1219template <class Impl> 1220void 1221FullO3CPU<Impl>::drainSanityCheck() const 1222{ 1223 assert(isDrained()); 1224 fetch.drainSanityCheck(); 1225 decode.drainSanityCheck(); 1226 rename.drainSanityCheck(); 1227 iew.drainSanityCheck(); 1228 commit.drainSanityCheck(); 1229} 1230 1231template <class Impl> 1232bool 1233FullO3CPU<Impl>::isDrained() const 1234{ 1235 bool drained(true); 1236 1237 for (ThreadID i = 0; i < thread.size(); ++i) { 1238 if (activateThreadEvent[i].scheduled()) { 1239 DPRINTF(Drain, "CPU not drained, tread %i has a " 1240 "pending activate event\n", i); 1241 drained = false; 1242 } 1243 if (deallocateContextEvent[i].scheduled()) { 1244 DPRINTF(Drain, "CPU not drained, tread %i has a " 1245 "pending deallocate context event\n", i); 1246 drained = false; 1247 } 1248 } 1249 1250 if (!instList.empty() || !removeList.empty()) { 1251 DPRINTF(Drain, "Main CPU structures not drained.\n"); 1252 drained = false; 1253 } 1254 1255 if (!fetch.isDrained()) { 1256 DPRINTF(Drain, "Fetch not drained.\n"); 1257 drained = false; 1258 } 1259 1260 if (!decode.isDrained()) { 1261 DPRINTF(Drain, "Decode not drained.\n"); 1262 drained = false; 1263 } 1264 1265 if (!rename.isDrained()) { 1266 DPRINTF(Drain, "Rename not drained.\n"); 1267 drained = false; 1268 } 1269 1270 if (!iew.isDrained()) { 1271 DPRINTF(Drain, "IEW not drained.\n"); 1272 drained = false; 1273 } 1274 1275 if (!commit.isDrained()) { 1276 DPRINTF(Drain, "Commit not drained.\n"); 1277 drained = false; 1278 } 1279 1280 return drained; 1281} 1282 1283template <class Impl> 1284void 1285FullO3CPU<Impl>::commitDrained(ThreadID tid) 1286{ 1287 fetch.drainStall(tid); 1288} 1289 1290template <class Impl> 1291void 1292FullO3CPU<Impl>::drainResume() 1293{ 1294 setDrainState(Drainable::Running); 1295 if (switchedOut()) 1296 return; 1297 1298 DPRINTF(Drain, "Resuming...\n"); 1299 verifyMemoryMode(); 1300 1301 fetch.drainResume(); 1302 commit.drainResume(); 1303 1304 _status = Idle; 1305 for (ThreadID i = 0; i < thread.size(); i++) { 1306 if (thread[i]->status() == ThreadContext::Active) { 1307 DPRINTF(Drain, "Activating thread: %i\n", i); 1308 activateThread(i); 1309 _status = Running; 1310 } 1311 } 1312 1313 assert(!tickEvent.scheduled()); 1314 if (_status == Running) 1315 schedule(tickEvent, nextCycle()); 1316} 1317 1318template <class Impl> 1319void 1320FullO3CPU<Impl>::switchOut() 1321{ 1322 DPRINTF(O3CPU, "Switching out\n"); 1323 BaseCPU::switchOut(); 1324 1325 activityRec.reset(); 1326 1327 _status = SwitchedOut; 1328 1329 if (checker) 1330 checker->switchOut(); 1331} 1332 1333template <class Impl> 1334void 1335FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU) 1336{ 1337 BaseCPU::takeOverFrom(oldCPU); 1338 1339 fetch.takeOverFrom(); 1340 decode.takeOverFrom(); 1341 rename.takeOverFrom(); 1342 iew.takeOverFrom(); 1343 commit.takeOverFrom(); 1344 1345 assert(!tickEvent.scheduled()); 1346 1347 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU); 1348 if (oldO3CPU) 1349 globalSeqNum = oldO3CPU->globalSeqNum; 1350 1351 lastRunningCycle = curCycle(); 1352 _status = Idle; 1353} 1354 1355template <class Impl> 1356void 1357FullO3CPU<Impl>::verifyMemoryMode() const 1358{ 1359 if (!system->isTimingMode()) { 1360 fatal("The O3 CPU requires the memory system to be in " 1361 "'timing' mode.\n"); 1362 } 1363} 1364 1365template <class Impl> 1366TheISA::MiscReg 1367FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) 1368{ 1369 return this->isa[tid]->readMiscRegNoEffect(misc_reg); 1370} 1371 1372template <class Impl> 1373TheISA::MiscReg 1374FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid) 1375{ 1376 miscRegfileReads++; 1377 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid)); 1378} 1379 1380template <class Impl> 1381void 1382FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg, 1383 const TheISA::MiscReg &val, ThreadID tid) 1384{ 1385 this->isa[tid]->setMiscRegNoEffect(misc_reg, val); 1386} 1387 1388template <class Impl> 1389void 1390FullO3CPU<Impl>::setMiscReg(int misc_reg, 1391 const TheISA::MiscReg &val, ThreadID tid) 1392{ 1393 miscRegfileWrites++; 1394 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid)); 1395} 1396 1397template <class Impl> 1398uint64_t 1399FullO3CPU<Impl>::readIntReg(int reg_idx) 1400{ 1401 intRegfileReads++; 1402 return regFile.readIntReg(reg_idx); 1403} 1404 1405template <class Impl> 1406FloatReg 1407FullO3CPU<Impl>::readFloatReg(int reg_idx) 1408{ 1409 fpRegfileReads++; 1410 return regFile.readFloatReg(reg_idx); 1411} 1412 1413template <class Impl> 1414FloatRegBits 1415FullO3CPU<Impl>::readFloatRegBits(int reg_idx) 1416{ 1417 fpRegfileReads++; 1418 return regFile.readFloatRegBits(reg_idx); 1419} 1420 1421template <class Impl> 1422CCReg 1423FullO3CPU<Impl>::readCCReg(int reg_idx) 1424{ 1425 ccRegfileReads++; 1426 return regFile.readCCReg(reg_idx); 1427} 1428 1429template <class Impl> 1430void 1431FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val) 1432{ 1433 intRegfileWrites++; 1434 regFile.setIntReg(reg_idx, val); 1435} 1436 1437template <class Impl> 1438void 1439FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val) 1440{ 1441 fpRegfileWrites++; 1442 regFile.setFloatReg(reg_idx, val); 1443} 1444 1445template <class Impl> 1446void 1447FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val) 1448{ 1449 fpRegfileWrites++; 1450 regFile.setFloatRegBits(reg_idx, val); 1451} 1452 1453template <class Impl> 1454void 1455FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val) 1456{ 1457 ccRegfileWrites++; 1458 regFile.setCCReg(reg_idx, val); 1459} 1460 1461template <class Impl> 1462uint64_t 1463FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid) 1464{ 1465 intRegfileReads++; 1466 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx); 1467 1468 return regFile.readIntReg(phys_reg); 1469} 1470 1471template <class Impl> 1472float 1473FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid) 1474{ 1475 fpRegfileReads++; 1476 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1477 1478 return regFile.readFloatReg(phys_reg); 1479} 1480 1481template <class Impl> 1482uint64_t 1483FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid) 1484{ 1485 fpRegfileReads++; 1486 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1487 1488 return regFile.readFloatRegBits(phys_reg); 1489} 1490 1491template <class Impl> 1492CCReg 1493FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid) 1494{ 1495 ccRegfileReads++; 1496 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx); 1497 1498 return regFile.readCCReg(phys_reg); 1499} 1500 1501template <class Impl> 1502void 1503FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid) 1504{ 1505 intRegfileWrites++; 1506 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx); 1507 1508 regFile.setIntReg(phys_reg, val); 1509} 1510 1511template <class Impl> 1512void 1513FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid) 1514{ 1515 fpRegfileWrites++; 1516 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1517 1518 regFile.setFloatReg(phys_reg, val); 1519} 1520 1521template <class Impl> 1522void 1523FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid) 1524{ 1525 fpRegfileWrites++; 1526 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1527 1528 regFile.setFloatRegBits(phys_reg, val); 1529} 1530 1531template <class Impl> 1532void 1533FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid) 1534{ 1535 ccRegfileWrites++; 1536 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx); 1537 1538 regFile.setCCReg(phys_reg, val); 1539} 1540 1541template <class Impl> 1542TheISA::PCState 1543FullO3CPU<Impl>::pcState(ThreadID tid) 1544{ 1545 return commit.pcState(tid); 1546} 1547 1548template <class Impl> 1549void 1550FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid) 1551{ 1552 commit.pcState(val, tid); 1553} 1554 1555template <class Impl> 1556Addr 1557FullO3CPU<Impl>::instAddr(ThreadID tid) 1558{ 1559 return commit.instAddr(tid); 1560} 1561 1562template <class Impl> 1563Addr 1564FullO3CPU<Impl>::nextInstAddr(ThreadID tid) 1565{ 1566 return commit.nextInstAddr(tid); 1567} 1568 1569template <class Impl> 1570MicroPC 1571FullO3CPU<Impl>::microPC(ThreadID tid) 1572{ 1573 return commit.microPC(tid); 1574} 1575 1576template <class Impl> 1577void 1578FullO3CPU<Impl>::squashFromTC(ThreadID tid) 1579{ 1580 this->thread[tid]->noSquashFromTC = true; 1581 this->commit.generateTCEvent(tid); 1582} 1583 1584template <class Impl> 1585typename FullO3CPU<Impl>::ListIt 1586FullO3CPU<Impl>::addInst(DynInstPtr &inst) 1587{ 1588 instList.push_back(inst); 1589 1590 return --(instList.end()); 1591} 1592 1593template <class Impl> 1594void 1595FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst) 1596{ 1597 // Keep an instruction count. 1598 if (!inst->isMicroop() || inst->isLastMicroop()) { 1599 thread[tid]->numInst++; 1600 thread[tid]->numInsts++; 1601 committedInsts[tid]++; 1602 } 1603 thread[tid]->numOp++; 1604 thread[tid]->numOps++; 1605 committedOps[tid]++; 1606 1607 system->totalNumInsts++; 1608 // Check for instruction-count-based events. 1609 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst); 1610 system->instEventQueue.serviceEvents(system->totalNumInsts); 1611} 1612 1613template <class Impl> 1614void 1615FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst) 1616{ 1617 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s " 1618 "[sn:%lli]\n", 1619 inst->threadNumber, inst->pcState(), inst->seqNum); 1620 1621 removeInstsThisCycle = true; 1622 1623 // Remove the front instruction. 1624 removeList.push(inst->getInstListIt()); 1625} 1626 1627template <class Impl> 1628void 1629FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid) 1630{ 1631 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction" 1632 " list.\n", tid); 1633 1634 ListIt end_it; 1635 1636 bool rob_empty = false; 1637 1638 if (instList.empty()) { 1639 return; 1640 } else if (rob.isEmpty(tid)) { 1641 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n"); 1642 end_it = instList.begin(); 1643 rob_empty = true; 1644 } else { 1645 end_it = (rob.readTailInst(tid))->getInstListIt(); 1646 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n"); 1647 } 1648 1649 removeInstsThisCycle = true; 1650 1651 ListIt inst_it = instList.end(); 1652 1653 inst_it--; 1654 1655 // Walk through the instruction list, removing any instructions 1656 // that were inserted after the given instruction iterator, end_it. 1657 while (inst_it != end_it) { 1658 assert(!instList.empty()); 1659 1660 squashInstIt(inst_it, tid); 1661 1662 inst_it--; 1663 } 1664 1665 // If the ROB was empty, then we actually need to remove the first 1666 // instruction as well. 1667 if (rob_empty) { 1668 squashInstIt(inst_it, tid); 1669 } 1670} 1671 1672template <class Impl> 1673void 1674FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid) 1675{ 1676 assert(!instList.empty()); 1677 1678 removeInstsThisCycle = true; 1679 1680 ListIt inst_iter = instList.end(); 1681 1682 inst_iter--; 1683 1684 DPRINTF(O3CPU, "Deleting instructions from instruction " 1685 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n", 1686 tid, seq_num, (*inst_iter)->seqNum); 1687 1688 while ((*inst_iter)->seqNum > seq_num) { 1689 1690 bool break_loop = (inst_iter == instList.begin()); 1691 1692 squashInstIt(inst_iter, tid); 1693 1694 inst_iter--; 1695 1696 if (break_loop) 1697 break; 1698 } 1699} 1700 1701template <class Impl> 1702inline void 1703FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid) 1704{ 1705 if ((*instIt)->threadNumber == tid) { 1706 DPRINTF(O3CPU, "Squashing instruction, " 1707 "[tid:%i] [sn:%lli] PC %s\n", 1708 (*instIt)->threadNumber, 1709 (*instIt)->seqNum, 1710 (*instIt)->pcState()); 1711 1712 // Mark it as squashed. 1713 (*instIt)->setSquashed(); 1714 1715 // @todo: Formulate a consistent method for deleting 1716 // instructions from the instruction list 1717 // Remove the instruction from the list. 1718 removeList.push(instIt); 1719 } 1720} 1721 1722template <class Impl> 1723void 1724FullO3CPU<Impl>::cleanUpRemovedInsts() 1725{ 1726 while (!removeList.empty()) { 1727 DPRINTF(O3CPU, "Removing instruction, " 1728 "[tid:%i] [sn:%lli] PC %s\n", 1729 (*removeList.front())->threadNumber, 1730 (*removeList.front())->seqNum, 1731 (*removeList.front())->pcState()); 1732 1733 instList.erase(removeList.front()); 1734 1735 removeList.pop(); 1736 } 1737 1738 removeInstsThisCycle = false; 1739} 1740/* 1741template <class Impl> 1742void 1743FullO3CPU<Impl>::removeAllInsts() 1744{ 1745 instList.clear(); 1746} 1747*/ 1748template <class Impl> 1749void 1750FullO3CPU<Impl>::dumpInsts() 1751{ 1752 int num = 0; 1753 1754 ListIt inst_list_it = instList.begin(); 1755 1756 cprintf("Dumping Instruction List\n"); 1757 1758 while (inst_list_it != instList.end()) { 1759 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n" 1760 "Squashed:%i\n\n", 1761 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber, 1762 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(), 1763 (*inst_list_it)->isSquashed()); 1764 inst_list_it++; 1765 ++num; 1766 } 1767} 1768/* 1769template <class Impl> 1770void 1771FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst) 1772{ 1773 iew.wakeDependents(inst); 1774} 1775*/ 1776template <class Impl> 1777void 1778FullO3CPU<Impl>::wakeCPU() 1779{ 1780 if (activityRec.active() || tickEvent.scheduled()) { 1781 DPRINTF(Activity, "CPU already running.\n"); 1782 return; 1783 } 1784 1785 DPRINTF(Activity, "Waking up CPU\n"); 1786 1787 Cycles cycles(curCycle() - lastRunningCycle); 1788 // @todo: This is an oddity that is only here to match the stats 1789 if (cycles != 0) 1790 --cycles; 1791 idleCycles += cycles; 1792 numCycles += cycles; 1793 1794 schedule(tickEvent, clockEdge()); 1795} 1796 1797template <class Impl> 1798void 1799FullO3CPU<Impl>::wakeup() 1800{ 1801 if (this->thread[0]->status() != ThreadContext::Suspended) 1802 return; 1803 1804 this->wakeCPU(); 1805 1806 DPRINTF(Quiesce, "Suspended Processor woken\n"); 1807 this->threadContexts[0]->activate(); 1808} 1809 1810template <class Impl> 1811ThreadID 1812FullO3CPU<Impl>::getFreeTid() 1813{ 1814 for (ThreadID tid = 0; tid < numThreads; tid++) { 1815 if (!tids[tid]) { 1816 tids[tid] = true; 1817 return tid; 1818 } 1819 } 1820 1821 return InvalidThreadID; 1822} 1823 1824template <class Impl> 1825void 1826FullO3CPU<Impl>::doContextSwitch() 1827{ 1828 if (contextSwitch) { 1829 1830 //ADD CODE TO DEACTIVE THREAD HERE (???) 1831 1832 ThreadID size = cpuWaitList.size(); 1833 for (ThreadID tid = 0; tid < size; tid++) { 1834 activateWhenReady(tid); 1835 } 1836 1837 if (cpuWaitList.size() == 0) 1838 contextSwitch = true; 1839 } 1840} 1841 1842template <class Impl> 1843void 1844FullO3CPU<Impl>::updateThreadPriority() 1845{ 1846 if (activeThreads.size() > 1) { 1847 //DEFAULT TO ROUND ROBIN SCHEME 1848 //e.g. Move highest priority to end of thread list 1849 list<ThreadID>::iterator list_begin = activeThreads.begin(); 1850 1851 unsigned high_thread = *list_begin; 1852 1853 activeThreads.erase(list_begin); 1854 1855 activeThreads.push_back(high_thread); 1856 } 1857} 1858 1859// Forward declaration of FullO3CPU. 1860template class FullO3CPU<O3CPUImpl>; 1861