cpu.cc revision 8948:e95ee70f876c
1/* 2 * Copyright (c) 2011-2012 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2004-2006 The Regents of The University of Michigan 15 * Copyright (c) 2011 Regents of the University of California 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Kevin Lim 42 * Korey Sewell 43 * Rick Strong 44 */ 45 46#include "arch/kernel_stats.hh" 47#include "config/the_isa.hh" 48#include "cpu/checker/cpu.hh" 49#include "cpu/checker/thread_context.hh" 50#include "cpu/o3/cpu.hh" 51#include "cpu/o3/isa_specific.hh" 52#include "cpu/o3/thread_context.hh" 53#include "cpu/activity.hh" 54#include "cpu/quiesce_event.hh" 55#include "cpu/simple_thread.hh" 56#include "cpu/thread_context.hh" 57#include "debug/Activity.hh" 58#include "debug/O3CPU.hh" 59#include "debug/Quiesce.hh" 60#include "enums/MemoryMode.hh" 61#include "sim/core.hh" 62#include "sim/full_system.hh" 63#include "sim/process.hh" 64#include "sim/stat_control.hh" 65#include "sim/system.hh" 66 67#if THE_ISA == ALPHA_ISA 68#include "arch/alpha/osfpal.hh" 69#include "debug/Activity.hh" 70#endif 71 72struct BaseCPUParams; 73 74using namespace TheISA; 75using namespace std; 76 77BaseO3CPU::BaseO3CPU(BaseCPUParams *params) 78 : BaseCPU(params) 79{ 80} 81 82void 83BaseO3CPU::regStats() 84{ 85 BaseCPU::regStats(); 86} 87 88template<class Impl> 89bool 90FullO3CPU<Impl>::IcachePort::recvTiming(PacketPtr pkt) 91{ 92 assert(pkt->isResponse()); 93 DPRINTF(O3CPU, "Fetch unit received timing\n"); 94 // We shouldn't ever get a block in ownership state 95 assert(!(pkt->memInhibitAsserted() && !pkt->sharedAsserted())); 96 fetch->processCacheCompletion(pkt); 97 98 return true; 99} 100 101template<class Impl> 102void 103FullO3CPU<Impl>::IcachePort::recvRetry() 104{ 105 fetch->recvRetry(); 106} 107 108template <class Impl> 109bool 110FullO3CPU<Impl>::DcachePort::recvTiming(PacketPtr pkt) 111{ 112 assert(pkt->isResponse()); 113 return lsq->recvTiming(pkt); 114} 115 116template <class Impl> 117bool 118FullO3CPU<Impl>::DcachePort::recvTimingSnoop(PacketPtr pkt) 119{ 120 assert(pkt->isRequest()); 121 return lsq->recvTimingSnoop(pkt); 122} 123 124template <class Impl> 125void 126FullO3CPU<Impl>::DcachePort::recvRetry() 127{ 128 lsq->recvRetry(); 129} 130 131template <class Impl> 132FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c) 133 : Event(CPU_Tick_Pri), cpu(c) 134{ 135} 136 137template <class Impl> 138void 139FullO3CPU<Impl>::TickEvent::process() 140{ 141 cpu->tick(); 142} 143 144template <class Impl> 145const char * 146FullO3CPU<Impl>::TickEvent::description() const 147{ 148 return "FullO3CPU tick"; 149} 150 151template <class Impl> 152FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent() 153 : Event(CPU_Switch_Pri) 154{ 155} 156 157template <class Impl> 158void 159FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num, 160 FullO3CPU<Impl> *thread_cpu) 161{ 162 tid = thread_num; 163 cpu = thread_cpu; 164} 165 166template <class Impl> 167void 168FullO3CPU<Impl>::ActivateThreadEvent::process() 169{ 170 cpu->activateThread(tid); 171} 172 173template <class Impl> 174const char * 175FullO3CPU<Impl>::ActivateThreadEvent::description() const 176{ 177 return "FullO3CPU \"Activate Thread\""; 178} 179 180template <class Impl> 181FullO3CPU<Impl>::DeallocateContextEvent::DeallocateContextEvent() 182 : Event(CPU_Tick_Pri), tid(0), remove(false), cpu(NULL) 183{ 184} 185 186template <class Impl> 187void 188FullO3CPU<Impl>::DeallocateContextEvent::init(int thread_num, 189 FullO3CPU<Impl> *thread_cpu) 190{ 191 tid = thread_num; 192 cpu = thread_cpu; 193 remove = false; 194} 195 196template <class Impl> 197void 198FullO3CPU<Impl>::DeallocateContextEvent::process() 199{ 200 cpu->deactivateThread(tid); 201 if (remove) 202 cpu->removeThread(tid); 203} 204 205template <class Impl> 206const char * 207FullO3CPU<Impl>::DeallocateContextEvent::description() const 208{ 209 return "FullO3CPU \"Deallocate Context\""; 210} 211 212template <class Impl> 213FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params) 214 : BaseO3CPU(params), 215 itb(params->itb), 216 dtb(params->dtb), 217 tickEvent(this), 218#ifndef NDEBUG 219 instcount(0), 220#endif 221 removeInstsThisCycle(false), 222 fetch(this, params), 223 decode(this, params), 224 rename(this, params), 225 iew(this, params), 226 commit(this, params), 227 228 regFile(this, params->numPhysIntRegs, 229 params->numPhysFloatRegs), 230 231 freeList(params->numThreads, 232 TheISA::NumIntRegs, params->numPhysIntRegs, 233 TheISA::NumFloatRegs, params->numPhysFloatRegs), 234 235 rob(this, 236 params->numROBEntries, params->squashWidth, 237 params->smtROBPolicy, params->smtROBThreshold, 238 params->numThreads), 239 240 scoreboard(params->numThreads, 241 TheISA::NumIntRegs, params->numPhysIntRegs, 242 TheISA::NumFloatRegs, params->numPhysFloatRegs, 243 TheISA::NumMiscRegs * numThreads, 244 TheISA::ZeroReg), 245 246 icachePort(&fetch, this), 247 dcachePort(&iew.ldstQueue, this), 248 249 timeBuffer(params->backComSize, params->forwardComSize), 250 fetchQueue(params->backComSize, params->forwardComSize), 251 decodeQueue(params->backComSize, params->forwardComSize), 252 renameQueue(params->backComSize, params->forwardComSize), 253 iewQueue(params->backComSize, params->forwardComSize), 254 activityRec(name(), NumStages, 255 params->backComSize + params->forwardComSize, 256 params->activity), 257 258 globalSeqNum(1), 259 system(params->system), 260 drainCount(0), 261 deferRegistration(params->defer_registration) 262{ 263 if (!deferRegistration) { 264 _status = Running; 265 } else { 266 _status = Idle; 267 } 268 269 if (params->checker) { 270 BaseCPU *temp_checker = params->checker; 271 checker = dynamic_cast<Checker<Impl> *>(temp_checker); 272 checker->setIcachePort(&icachePort); 273 checker->setSystem(params->system); 274 } else { 275 checker = NULL; 276 } 277 278 if (!FullSystem) { 279 thread.resize(numThreads); 280 tids.resize(numThreads); 281 } 282 283 // The stages also need their CPU pointer setup. However this 284 // must be done at the upper level CPU because they have pointers 285 // to the upper level CPU, and not this FullO3CPU. 286 287 // Set up Pointers to the activeThreads list for each stage 288 fetch.setActiveThreads(&activeThreads); 289 decode.setActiveThreads(&activeThreads); 290 rename.setActiveThreads(&activeThreads); 291 iew.setActiveThreads(&activeThreads); 292 commit.setActiveThreads(&activeThreads); 293 294 // Give each of the stages the time buffer they will use. 295 fetch.setTimeBuffer(&timeBuffer); 296 decode.setTimeBuffer(&timeBuffer); 297 rename.setTimeBuffer(&timeBuffer); 298 iew.setTimeBuffer(&timeBuffer); 299 commit.setTimeBuffer(&timeBuffer); 300 301 // Also setup each of the stages' queues. 302 fetch.setFetchQueue(&fetchQueue); 303 decode.setFetchQueue(&fetchQueue); 304 commit.setFetchQueue(&fetchQueue); 305 decode.setDecodeQueue(&decodeQueue); 306 rename.setDecodeQueue(&decodeQueue); 307 rename.setRenameQueue(&renameQueue); 308 iew.setRenameQueue(&renameQueue); 309 iew.setIEWQueue(&iewQueue); 310 commit.setIEWQueue(&iewQueue); 311 commit.setRenameQueue(&renameQueue); 312 313 commit.setIEWStage(&iew); 314 rename.setIEWStage(&iew); 315 rename.setCommitStage(&commit); 316 317 ThreadID active_threads; 318 if (FullSystem) { 319 active_threads = 1; 320 } else { 321 active_threads = params->workload.size(); 322 323 if (active_threads > Impl::MaxThreads) { 324 panic("Workload Size too large. Increase the 'MaxThreads' " 325 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) " 326 "or edit your workload size."); 327 } 328 } 329 330 //Make Sure That this a Valid Architeture 331 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs); 332 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs); 333 334 rename.setScoreboard(&scoreboard); 335 iew.setScoreboard(&scoreboard); 336 337 // Setup the rename map for whichever stages need it. 338 PhysRegIndex lreg_idx = 0; 339 PhysRegIndex freg_idx = params->numPhysIntRegs; //Index to 1 after int regs 340 341 for (ThreadID tid = 0; tid < numThreads; tid++) { 342 bool bindRegs = (tid <= active_threads - 1); 343 344 commitRenameMap[tid].init(TheISA::NumIntRegs, 345 params->numPhysIntRegs, 346 lreg_idx, //Index for Logical. Regs 347 348 TheISA::NumFloatRegs, 349 params->numPhysFloatRegs, 350 freg_idx, //Index for Float Regs 351 352 TheISA::NumMiscRegs, 353 354 TheISA::ZeroReg, 355 TheISA::ZeroReg, 356 357 tid, 358 false); 359 360 renameMap[tid].init(TheISA::NumIntRegs, 361 params->numPhysIntRegs, 362 lreg_idx, //Index for Logical. Regs 363 364 TheISA::NumFloatRegs, 365 params->numPhysFloatRegs, 366 freg_idx, //Index for Float Regs 367 368 TheISA::NumMiscRegs, 369 370 TheISA::ZeroReg, 371 TheISA::ZeroReg, 372 373 tid, 374 bindRegs); 375 376 activateThreadEvent[tid].init(tid, this); 377 deallocateContextEvent[tid].init(tid, this); 378 } 379 380 rename.setRenameMap(renameMap); 381 commit.setRenameMap(commitRenameMap); 382 383 // Give renameMap & rename stage access to the freeList; 384 for (ThreadID tid = 0; tid < numThreads; tid++) 385 renameMap[tid].setFreeList(&freeList); 386 rename.setFreeList(&freeList); 387 388 // Setup the ROB for whichever stages need it. 389 commit.setROB(&rob); 390 391 lastRunningCycle = curTick(); 392 393 lastActivatedCycle = -1; 394#if 0 395 // Give renameMap & rename stage access to the freeList; 396 for (ThreadID tid = 0; tid < numThreads; tid++) 397 globalSeqNum[tid] = 1; 398#endif 399 400 contextSwitch = false; 401 DPRINTF(O3CPU, "Creating O3CPU object.\n"); 402 403 // Setup any thread state. 404 this->thread.resize(this->numThreads); 405 406 for (ThreadID tid = 0; tid < this->numThreads; ++tid) { 407 if (FullSystem) { 408 // SMT is not supported in FS mode yet. 409 assert(this->numThreads == 1); 410 this->thread[tid] = new Thread(this, 0, NULL); 411 } else { 412 if (tid < params->workload.size()) { 413 DPRINTF(O3CPU, "Workload[%i] process is %#x", 414 tid, this->thread[tid]); 415 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 416 (typename Impl::O3CPU *)(this), 417 tid, params->workload[tid]); 418 419 //usedTids[tid] = true; 420 //threadMap[tid] = tid; 421 } else { 422 //Allocate Empty thread so M5 can use later 423 //when scheduling threads to CPU 424 Process* dummy_proc = NULL; 425 426 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 427 (typename Impl::O3CPU *)(this), 428 tid, dummy_proc); 429 //usedTids[tid] = false; 430 } 431 } 432 433 ThreadContext *tc; 434 435 // Setup the TC that will serve as the interface to the threads/CPU. 436 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>; 437 438 tc = o3_tc; 439 440 // If we're using a checker, then the TC should be the 441 // CheckerThreadContext. 442 if (params->checker) { 443 tc = new CheckerThreadContext<O3ThreadContext<Impl> >( 444 o3_tc, this->checker); 445 } 446 447 o3_tc->cpu = (typename Impl::O3CPU *)(this); 448 assert(o3_tc->cpu); 449 o3_tc->thread = this->thread[tid]; 450 451 if (FullSystem) { 452 // Setup quiesce event. 453 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc); 454 } 455 // Give the thread the TC. 456 this->thread[tid]->tc = tc; 457 458 // Add the TC to the CPU's list of TC's. 459 this->threadContexts.push_back(tc); 460 } 461 462 // FullO3CPU always requires an interrupt controller. 463 if (!params->defer_registration && !interrupts) { 464 fatal("FullO3CPU %s has no interrupt controller.\n" 465 "Ensure createInterruptController() is called.\n", name()); 466 } 467 468 for (ThreadID tid = 0; tid < this->numThreads; tid++) 469 this->thread[tid]->setFuncExeInst(0); 470 471 lockAddr = 0; 472 lockFlag = false; 473} 474 475template <class Impl> 476FullO3CPU<Impl>::~FullO3CPU() 477{ 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"); 513 514 committedOps 515 .init(numThreads) 516 .name(name() + ".committedOps") 517 .desc("Number of Ops (including micro ops) Simulated"); 518 519 totalCommittedInsts 520 .name(name() + ".committedInsts_total") 521 .desc("Number of Instructions Simulated"); 522 523 cpi 524 .name(name() + ".cpi") 525 .desc("CPI: Cycles Per Instruction") 526 .precision(6); 527 cpi = numCycles / committedInsts; 528 529 totalCpi 530 .name(name() + ".cpi_total") 531 .desc("CPI: Total CPI of All Threads") 532 .precision(6); 533 totalCpi = numCycles / totalCommittedInsts; 534 535 ipc 536 .name(name() + ".ipc") 537 .desc("IPC: Instructions Per Cycle") 538 .precision(6); 539 ipc = committedInsts / numCycles; 540 541 totalIpc 542 .name(name() + ".ipc_total") 543 .desc("IPC: Total IPC of All Threads") 544 .precision(6); 545 totalIpc = totalCommittedInsts / numCycles; 546 547 this->fetch.regStats(); 548 this->decode.regStats(); 549 this->rename.regStats(); 550 this->iew.regStats(); 551 this->commit.regStats(); 552 this->rob.regStats(); 553 554 intRegfileReads 555 .name(name() + ".int_regfile_reads") 556 .desc("number of integer regfile reads") 557 .prereq(intRegfileReads); 558 559 intRegfileWrites 560 .name(name() + ".int_regfile_writes") 561 .desc("number of integer regfile writes") 562 .prereq(intRegfileWrites); 563 564 fpRegfileReads 565 .name(name() + ".fp_regfile_reads") 566 .desc("number of floating regfile reads") 567 .prereq(fpRegfileReads); 568 569 fpRegfileWrites 570 .name(name() + ".fp_regfile_writes") 571 .desc("number of floating regfile writes") 572 .prereq(fpRegfileWrites); 573 574 miscRegfileReads 575 .name(name() + ".misc_regfile_reads") 576 .desc("number of misc regfile reads") 577 .prereq(miscRegfileReads); 578 579 miscRegfileWrites 580 .name(name() + ".misc_regfile_writes") 581 .desc("number of misc regfile writes") 582 .prereq(miscRegfileWrites); 583} 584 585template <class Impl> 586void 587FullO3CPU<Impl>::tick() 588{ 589 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n"); 590 591 ++numCycles; 592 593// activity = false; 594 595 //Tick each of the stages 596 fetch.tick(); 597 598 decode.tick(); 599 600 rename.tick(); 601 602 iew.tick(); 603 604 commit.tick(); 605 606 if (!FullSystem) 607 doContextSwitch(); 608 609 // Now advance the time buffers 610 timeBuffer.advance(); 611 612 fetchQueue.advance(); 613 decodeQueue.advance(); 614 renameQueue.advance(); 615 iewQueue.advance(); 616 617 activityRec.advance(); 618 619 if (removeInstsThisCycle) { 620 cleanUpRemovedInsts(); 621 } 622 623 if (!tickEvent.scheduled()) { 624 if (_status == SwitchedOut || 625 getState() == SimObject::Drained) { 626 DPRINTF(O3CPU, "Switched out!\n"); 627 // increment stat 628 lastRunningCycle = curTick(); 629 } else if (!activityRec.active() || _status == Idle) { 630 DPRINTF(O3CPU, "Idle!\n"); 631 lastRunningCycle = curTick(); 632 timesIdled++; 633 } else { 634 schedule(tickEvent, nextCycle(curTick() + ticks(1))); 635 DPRINTF(O3CPU, "Scheduling next tick!\n"); 636 } 637 } 638 639 if (!FullSystem) 640 updateThreadPriority(); 641} 642 643template <class Impl> 644void 645FullO3CPU<Impl>::init() 646{ 647 BaseCPU::init(); 648 649 for (ThreadID tid = 0; tid < numThreads; ++tid) { 650 // Set inSyscall so that the CPU doesn't squash when initially 651 // setting up registers. 652 thread[tid]->inSyscall = true; 653 // Initialise the ThreadContext's memory proxies 654 thread[tid]->initMemProxies(thread[tid]->getTC()); 655 } 656 657 // this CPU could still be unconnected if we are restoring from a 658 // checkpoint and this CPU is to be switched in, thus we can only 659 // do this here if the instruction port is actually connected, if 660 // not we have to do it as part of takeOverFrom 661 if (icachePort.isConnected()) 662 fetch.setIcache(); 663 664 if (FullSystem && !params()->defer_registration) { 665 for (ThreadID tid = 0; tid < numThreads; tid++) { 666 ThreadContext *src_tc = threadContexts[tid]; 667 TheISA::initCPU(src_tc, src_tc->contextId()); 668 } 669 } 670 671 // Clear inSyscall. 672 for (int tid = 0; tid < numThreads; ++tid) 673 thread[tid]->inSyscall = false; 674 675 // Initialize stages. 676 fetch.initStage(); 677 iew.initStage(); 678 rename.initStage(); 679 commit.initStage(); 680 681 commit.setThreads(thread); 682} 683 684template <class Impl> 685void 686FullO3CPU<Impl>::activateThread(ThreadID tid) 687{ 688 list<ThreadID>::iterator isActive = 689 std::find(activeThreads.begin(), activeThreads.end(), tid); 690 691 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid); 692 693 if (isActive == activeThreads.end()) { 694 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n", 695 tid); 696 697 activeThreads.push_back(tid); 698 } 699} 700 701template <class Impl> 702void 703FullO3CPU<Impl>::deactivateThread(ThreadID tid) 704{ 705 //Remove From Active List, if Active 706 list<ThreadID>::iterator thread_it = 707 std::find(activeThreads.begin(), activeThreads.end(), tid); 708 709 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid); 710 711 if (thread_it != activeThreads.end()) { 712 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n", 713 tid); 714 activeThreads.erase(thread_it); 715 } 716} 717 718template <class Impl> 719Counter 720FullO3CPU<Impl>::totalInsts() const 721{ 722 Counter total(0); 723 724 ThreadID size = thread.size(); 725 for (ThreadID i = 0; i < size; i++) 726 total += thread[i]->numInst; 727 728 return total; 729} 730 731template <class Impl> 732Counter 733FullO3CPU<Impl>::totalOps() const 734{ 735 Counter total(0); 736 737 ThreadID size = thread.size(); 738 for (ThreadID i = 0; i < size; i++) 739 total += thread[i]->numOp; 740 741 return total; 742} 743 744template <class Impl> 745void 746FullO3CPU<Impl>::activateContext(ThreadID tid, int delay) 747{ 748 // Needs to set each stage to running as well. 749 if (delay){ 750 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate " 751 "on cycle %d\n", tid, curTick() + ticks(delay)); 752 scheduleActivateThreadEvent(tid, delay); 753 } else { 754 activateThread(tid); 755 } 756 757 if (lastActivatedCycle < curTick()) { 758 scheduleTickEvent(delay); 759 760 // Be sure to signal that there's some activity so the CPU doesn't 761 // deschedule itself. 762 activityRec.activity(); 763 fetch.wakeFromQuiesce(); 764 765 quiesceCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 766 767 lastActivatedCycle = curTick(); 768 769 _status = Running; 770 } 771} 772 773template <class Impl> 774bool 775FullO3CPU<Impl>::scheduleDeallocateContext(ThreadID tid, bool remove, 776 int delay) 777{ 778 // Schedule removal of thread data from CPU 779 if (delay){ 780 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate " 781 "on cycle %d\n", tid, curTick() + ticks(delay)); 782 scheduleDeallocateContextEvent(tid, remove, delay); 783 return false; 784 } else { 785 deactivateThread(tid); 786 if (remove) 787 removeThread(tid); 788 return true; 789 } 790} 791 792template <class Impl> 793void 794FullO3CPU<Impl>::suspendContext(ThreadID tid) 795{ 796 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid); 797 bool deallocated = scheduleDeallocateContext(tid, false, 1); 798 // If this was the last thread then unschedule the tick event. 799 if ((activeThreads.size() == 1 && !deallocated) || 800 activeThreads.size() == 0) 801 unscheduleTickEvent(); 802 803 DPRINTF(Quiesce, "Suspending Context\n"); 804 lastRunningCycle = curTick(); 805 _status = Idle; 806} 807 808template <class Impl> 809void 810FullO3CPU<Impl>::haltContext(ThreadID tid) 811{ 812 //For now, this is the same as deallocate 813 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid); 814 scheduleDeallocateContext(tid, true, 1); 815} 816 817template <class Impl> 818void 819FullO3CPU<Impl>::insertThread(ThreadID tid) 820{ 821 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU"); 822 // Will change now that the PC and thread state is internal to the CPU 823 // and not in the ThreadContext. 824 ThreadContext *src_tc; 825 if (FullSystem) 826 src_tc = system->threadContexts[tid]; 827 else 828 src_tc = tcBase(tid); 829 830 //Bind Int Regs to Rename Map 831 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 832 PhysRegIndex phys_reg = freeList.getIntReg(); 833 834 renameMap[tid].setEntry(ireg,phys_reg); 835 scoreboard.setReg(phys_reg); 836 } 837 838 //Bind Float Regs to Rename Map 839 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) { 840 PhysRegIndex phys_reg = freeList.getFloatReg(); 841 842 renameMap[tid].setEntry(freg,phys_reg); 843 scoreboard.setReg(phys_reg); 844 } 845 846 //Copy Thread Data Into RegFile 847 //this->copyFromTC(tid); 848 849 //Set PC/NPC/NNPC 850 pcState(src_tc->pcState(), tid); 851 852 src_tc->setStatus(ThreadContext::Active); 853 854 activateContext(tid,1); 855 856 //Reset ROB/IQ/LSQ Entries 857 commit.rob->resetEntries(); 858 iew.resetEntries(); 859} 860 861template <class Impl> 862void 863FullO3CPU<Impl>::removeThread(ThreadID tid) 864{ 865 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid); 866 867 // Copy Thread Data From RegFile 868 // If thread is suspended, it might be re-allocated 869 // this->copyToTC(tid); 870 871 872 // @todo: 2-27-2008: Fix how we free up rename mappings 873 // here to alleviate the case for double-freeing registers 874 // in SMT workloads. 875 876 // Unbind Int Regs from Rename Map 877 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 878 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg); 879 880 scoreboard.unsetReg(phys_reg); 881 freeList.addReg(phys_reg); 882 } 883 884 // Unbind Float Regs from Rename Map 885 for (int freg = TheISA::NumIntRegs; freg < TheISA::NumFloatRegs; freg++) { 886 PhysRegIndex phys_reg = renameMap[tid].lookup(freg); 887 888 scoreboard.unsetReg(phys_reg); 889 freeList.addReg(phys_reg); 890 } 891 892 // Squash Throughout Pipeline 893 DynInstPtr inst = commit.rob->readHeadInst(tid); 894 InstSeqNum squash_seq_num = inst->seqNum; 895 fetch.squash(0, squash_seq_num, inst, tid); 896 decode.squash(tid); 897 rename.squash(squash_seq_num, tid); 898 iew.squash(tid); 899 iew.ldstQueue.squash(squash_seq_num, tid); 900 commit.rob->squash(squash_seq_num, tid); 901 902 903 assert(iew.instQueue.getCount(tid) == 0); 904 assert(iew.ldstQueue.getCount(tid) == 0); 905 906 // Reset ROB/IQ/LSQ Entries 907 908 // Commented out for now. This should be possible to do by 909 // telling all the pipeline stages to drain first, and then 910 // checking until the drain completes. Once the pipeline is 911 // drained, call resetEntries(). - 10-09-06 ktlim 912/* 913 if (activeThreads.size() >= 1) { 914 commit.rob->resetEntries(); 915 iew.resetEntries(); 916 } 917*/ 918} 919 920 921template <class Impl> 922void 923FullO3CPU<Impl>::activateWhenReady(ThreadID tid) 924{ 925 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming" 926 "(e.g. PhysRegs/ROB/IQ/LSQ) \n", 927 tid); 928 929 bool ready = true; 930 931 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) { 932 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 933 "Phys. Int. Regs.\n", 934 tid); 935 ready = false; 936 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) { 937 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 938 "Phys. Float. Regs.\n", 939 tid); 940 ready = false; 941 } else if (commit.rob->numFreeEntries() >= 942 commit.rob->entryAmount(activeThreads.size() + 1)) { 943 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 944 "ROB entries.\n", 945 tid); 946 ready = false; 947 } else if (iew.instQueue.numFreeEntries() >= 948 iew.instQueue.entryAmount(activeThreads.size() + 1)) { 949 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 950 "IQ entries.\n", 951 tid); 952 ready = false; 953 } else if (iew.ldstQueue.numFreeEntries() >= 954 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) { 955 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 956 "LSQ entries.\n", 957 tid); 958 ready = false; 959 } 960 961 if (ready) { 962 insertThread(tid); 963 964 contextSwitch = false; 965 966 cpuWaitList.remove(tid); 967 } else { 968 suspendContext(tid); 969 970 //blocks fetch 971 contextSwitch = true; 972 973 //@todo: dont always add to waitlist 974 //do waitlist 975 cpuWaitList.push_back(tid); 976 } 977} 978 979template <class Impl> 980Fault 981FullO3CPU<Impl>::hwrei(ThreadID tid) 982{ 983#if THE_ISA == ALPHA_ISA 984 // Need to clear the lock flag upon returning from an interrupt. 985 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid); 986 987 this->thread[tid]->kernelStats->hwrei(); 988 989 // FIXME: XXX check for interrupts? XXX 990#endif 991 return NoFault; 992} 993 994template <class Impl> 995bool 996FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid) 997{ 998#if THE_ISA == ALPHA_ISA 999 if (this->thread[tid]->kernelStats) 1000 this->thread[tid]->kernelStats->callpal(palFunc, 1001 this->threadContexts[tid]); 1002 1003 switch (palFunc) { 1004 case PAL::halt: 1005 halt(); 1006 if (--System::numSystemsRunning == 0) 1007 exitSimLoop("all cpus halted"); 1008 break; 1009 1010 case PAL::bpt: 1011 case PAL::bugchk: 1012 if (this->system->breakpoint()) 1013 return false; 1014 break; 1015 } 1016#endif 1017 return true; 1018} 1019 1020template <class Impl> 1021Fault 1022FullO3CPU<Impl>::getInterrupts() 1023{ 1024 // Check if there are any outstanding interrupts 1025 return this->interrupts->getInterrupt(this->threadContexts[0]); 1026} 1027 1028template <class Impl> 1029void 1030FullO3CPU<Impl>::processInterrupts(Fault interrupt) 1031{ 1032 // Check for interrupts here. For now can copy the code that 1033 // exists within isa_fullsys_traits.hh. Also assume that thread 0 1034 // is the one that handles the interrupts. 1035 // @todo: Possibly consolidate the interrupt checking code. 1036 // @todo: Allow other threads to handle interrupts. 1037 1038 assert(interrupt != NoFault); 1039 this->interrupts->updateIntrInfo(this->threadContexts[0]); 1040 1041 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name()); 1042 this->trap(interrupt, 0, NULL); 1043} 1044 1045template <class Impl> 1046void 1047FullO3CPU<Impl>::trap(Fault fault, ThreadID tid, StaticInstPtr inst) 1048{ 1049 // Pass the thread's TC into the invoke method. 1050 fault->invoke(this->threadContexts[tid], inst); 1051} 1052 1053template <class Impl> 1054void 1055FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid) 1056{ 1057 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid); 1058 1059 DPRINTF(Activity,"Activity: syscall() called.\n"); 1060 1061 // Temporarily increase this by one to account for the syscall 1062 // instruction. 1063 ++(this->thread[tid]->funcExeInst); 1064 1065 // Execute the actual syscall. 1066 this->thread[tid]->syscall(callnum); 1067 1068 // Decrease funcExeInst by one as the normal commit will handle 1069 // incrementing it. 1070 --(this->thread[tid]->funcExeInst); 1071} 1072 1073template <class Impl> 1074void 1075FullO3CPU<Impl>::serialize(std::ostream &os) 1076{ 1077 SimObject::State so_state = SimObject::getState(); 1078 SERIALIZE_ENUM(so_state); 1079 BaseCPU::serialize(os); 1080 nameOut(os, csprintf("%s.tickEvent", name())); 1081 tickEvent.serialize(os); 1082 1083 // Use SimpleThread's ability to checkpoint to make it easier to 1084 // write out the registers. Also make this static so it doesn't 1085 // get instantiated multiple times (causes a panic in statistics). 1086 static SimpleThread temp; 1087 1088 ThreadID size = thread.size(); 1089 for (ThreadID i = 0; i < size; i++) { 1090 nameOut(os, csprintf("%s.xc.%i", name(), i)); 1091 temp.copyTC(thread[i]->getTC()); 1092 temp.serialize(os); 1093 } 1094} 1095 1096template <class Impl> 1097void 1098FullO3CPU<Impl>::unserialize(Checkpoint *cp, const std::string §ion) 1099{ 1100 SimObject::State so_state; 1101 UNSERIALIZE_ENUM(so_state); 1102 BaseCPU::unserialize(cp, section); 1103 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section)); 1104 1105 // Use SimpleThread's ability to checkpoint to make it easier to 1106 // read in the registers. Also make this static so it doesn't 1107 // get instantiated multiple times (causes a panic in statistics). 1108 static SimpleThread temp; 1109 1110 ThreadID size = thread.size(); 1111 for (ThreadID i = 0; i < size; i++) { 1112 temp.copyTC(thread[i]->getTC()); 1113 temp.unserialize(cp, csprintf("%s.xc.%i", section, i)); 1114 thread[i]->getTC()->copyArchRegs(temp.getTC()); 1115 } 1116} 1117 1118template <class Impl> 1119unsigned int 1120FullO3CPU<Impl>::drain(Event *drain_event) 1121{ 1122 DPRINTF(O3CPU, "Switching out\n"); 1123 1124 // If the CPU isn't doing anything, then return immediately. 1125 if (_status == Idle || _status == SwitchedOut) { 1126 return 0; 1127 } 1128 1129 drainCount = 0; 1130 fetch.drain(); 1131 decode.drain(); 1132 rename.drain(); 1133 iew.drain(); 1134 commit.drain(); 1135 1136 // Wake the CPU and record activity so everything can drain out if 1137 // the CPU was not able to immediately drain. 1138 if (getState() != SimObject::Drained) { 1139 // A bit of a hack...set the drainEvent after all the drain() 1140 // calls have been made, that way if all of the stages drain 1141 // immediately, the signalDrained() function knows not to call 1142 // process on the drain event. 1143 drainEvent = drain_event; 1144 1145 wakeCPU(); 1146 activityRec.activity(); 1147 1148 return 1; 1149 } else { 1150 return 0; 1151 } 1152} 1153 1154template <class Impl> 1155void 1156FullO3CPU<Impl>::resume() 1157{ 1158 fetch.resume(); 1159 decode.resume(); 1160 rename.resume(); 1161 iew.resume(); 1162 commit.resume(); 1163 1164 changeState(SimObject::Running); 1165 1166 if (_status == SwitchedOut || _status == Idle) 1167 return; 1168 1169 assert(system->getMemoryMode() == Enums::timing); 1170 1171 if (!tickEvent.scheduled()) 1172 schedule(tickEvent, nextCycle()); 1173 _status = Running; 1174} 1175 1176template <class Impl> 1177void 1178FullO3CPU<Impl>::signalDrained() 1179{ 1180 if (++drainCount == NumStages) { 1181 if (tickEvent.scheduled()) 1182 tickEvent.squash(); 1183 1184 changeState(SimObject::Drained); 1185 1186 BaseCPU::switchOut(); 1187 1188 if (drainEvent) { 1189 drainEvent->process(); 1190 drainEvent = NULL; 1191 } 1192 } 1193 assert(drainCount <= 5); 1194} 1195 1196template <class Impl> 1197void 1198FullO3CPU<Impl>::switchOut() 1199{ 1200 fetch.switchOut(); 1201 rename.switchOut(); 1202 iew.switchOut(); 1203 commit.switchOut(); 1204 instList.clear(); 1205 while (!removeList.empty()) { 1206 removeList.pop(); 1207 } 1208 1209 _status = SwitchedOut; 1210 1211 if (checker) 1212 checker->switchOut(); 1213 1214 if (tickEvent.scheduled()) 1215 tickEvent.squash(); 1216} 1217 1218template <class Impl> 1219void 1220FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU) 1221{ 1222 // Flush out any old data from the time buffers. 1223 for (int i = 0; i < timeBuffer.getSize(); ++i) { 1224 timeBuffer.advance(); 1225 fetchQueue.advance(); 1226 decodeQueue.advance(); 1227 renameQueue.advance(); 1228 iewQueue.advance(); 1229 } 1230 1231 activityRec.reset(); 1232 1233 BaseCPU::takeOverFrom(oldCPU); 1234 1235 fetch.takeOverFrom(); 1236 decode.takeOverFrom(); 1237 rename.takeOverFrom(); 1238 iew.takeOverFrom(); 1239 commit.takeOverFrom(); 1240 1241 assert(!tickEvent.scheduled() || tickEvent.squashed()); 1242 1243 // @todo: Figure out how to properly select the tid to put onto 1244 // the active threads list. 1245 ThreadID tid = 0; 1246 1247 list<ThreadID>::iterator isActive = 1248 std::find(activeThreads.begin(), activeThreads.end(), tid); 1249 1250 if (isActive == activeThreads.end()) { 1251 //May Need to Re-code this if the delay variable is the delay 1252 //needed for thread to activate 1253 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n", 1254 tid); 1255 1256 activeThreads.push_back(tid); 1257 } 1258 1259 // Set all statuses to active, schedule the CPU's tick event. 1260 // @todo: Fix up statuses so this is handled properly 1261 ThreadID size = threadContexts.size(); 1262 for (ThreadID i = 0; i < size; ++i) { 1263 ThreadContext *tc = threadContexts[i]; 1264 if (tc->status() == ThreadContext::Active && _status != Running) { 1265 _status = Running; 1266 reschedule(tickEvent, nextCycle(), true); 1267 } 1268 } 1269 if (!tickEvent.scheduled()) 1270 schedule(tickEvent, nextCycle()); 1271 1272 lastRunningCycle = curTick(); 1273} 1274 1275template <class Impl> 1276TheISA::MiscReg 1277FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) 1278{ 1279 return this->isa[tid].readMiscRegNoEffect(misc_reg); 1280} 1281 1282template <class Impl> 1283TheISA::MiscReg 1284FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid) 1285{ 1286 miscRegfileReads++; 1287 return this->isa[tid].readMiscReg(misc_reg, tcBase(tid)); 1288} 1289 1290template <class Impl> 1291void 1292FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg, 1293 const TheISA::MiscReg &val, ThreadID tid) 1294{ 1295 this->isa[tid].setMiscRegNoEffect(misc_reg, val); 1296} 1297 1298template <class Impl> 1299void 1300FullO3CPU<Impl>::setMiscReg(int misc_reg, 1301 const TheISA::MiscReg &val, ThreadID tid) 1302{ 1303 miscRegfileWrites++; 1304 this->isa[tid].setMiscReg(misc_reg, val, tcBase(tid)); 1305} 1306 1307template <class Impl> 1308uint64_t 1309FullO3CPU<Impl>::readIntReg(int reg_idx) 1310{ 1311 intRegfileReads++; 1312 return regFile.readIntReg(reg_idx); 1313} 1314 1315template <class Impl> 1316FloatReg 1317FullO3CPU<Impl>::readFloatReg(int reg_idx) 1318{ 1319 fpRegfileReads++; 1320 return regFile.readFloatReg(reg_idx); 1321} 1322 1323template <class Impl> 1324FloatRegBits 1325FullO3CPU<Impl>::readFloatRegBits(int reg_idx) 1326{ 1327 fpRegfileReads++; 1328 return regFile.readFloatRegBits(reg_idx); 1329} 1330 1331template <class Impl> 1332void 1333FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val) 1334{ 1335 intRegfileWrites++; 1336 regFile.setIntReg(reg_idx, val); 1337} 1338 1339template <class Impl> 1340void 1341FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val) 1342{ 1343 fpRegfileWrites++; 1344 regFile.setFloatReg(reg_idx, val); 1345} 1346 1347template <class Impl> 1348void 1349FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val) 1350{ 1351 fpRegfileWrites++; 1352 regFile.setFloatRegBits(reg_idx, val); 1353} 1354 1355template <class Impl> 1356uint64_t 1357FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid) 1358{ 1359 intRegfileReads++; 1360 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1361 1362 return regFile.readIntReg(phys_reg); 1363} 1364 1365template <class Impl> 1366float 1367FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid) 1368{ 1369 fpRegfileReads++; 1370 int idx = reg_idx + TheISA::NumIntRegs; 1371 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1372 1373 return regFile.readFloatReg(phys_reg); 1374} 1375 1376template <class Impl> 1377uint64_t 1378FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid) 1379{ 1380 fpRegfileReads++; 1381 int idx = reg_idx + TheISA::NumIntRegs; 1382 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1383 1384 return regFile.readFloatRegBits(phys_reg); 1385} 1386 1387template <class Impl> 1388void 1389FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid) 1390{ 1391 intRegfileWrites++; 1392 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1393 1394 regFile.setIntReg(phys_reg, val); 1395} 1396 1397template <class Impl> 1398void 1399FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid) 1400{ 1401 fpRegfileWrites++; 1402 int idx = reg_idx + TheISA::NumIntRegs; 1403 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1404 1405 regFile.setFloatReg(phys_reg, val); 1406} 1407 1408template <class Impl> 1409void 1410FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid) 1411{ 1412 fpRegfileWrites++; 1413 int idx = reg_idx + TheISA::NumIntRegs; 1414 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1415 1416 regFile.setFloatRegBits(phys_reg, val); 1417} 1418 1419template <class Impl> 1420TheISA::PCState 1421FullO3CPU<Impl>::pcState(ThreadID tid) 1422{ 1423 return commit.pcState(tid); 1424} 1425 1426template <class Impl> 1427void 1428FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid) 1429{ 1430 commit.pcState(val, tid); 1431} 1432 1433template <class Impl> 1434Addr 1435FullO3CPU<Impl>::instAddr(ThreadID tid) 1436{ 1437 return commit.instAddr(tid); 1438} 1439 1440template <class Impl> 1441Addr 1442FullO3CPU<Impl>::nextInstAddr(ThreadID tid) 1443{ 1444 return commit.nextInstAddr(tid); 1445} 1446 1447template <class Impl> 1448MicroPC 1449FullO3CPU<Impl>::microPC(ThreadID tid) 1450{ 1451 return commit.microPC(tid); 1452} 1453 1454template <class Impl> 1455void 1456FullO3CPU<Impl>::squashFromTC(ThreadID tid) 1457{ 1458 this->thread[tid]->inSyscall = true; 1459 this->commit.generateTCEvent(tid); 1460} 1461 1462template <class Impl> 1463typename FullO3CPU<Impl>::ListIt 1464FullO3CPU<Impl>::addInst(DynInstPtr &inst) 1465{ 1466 instList.push_back(inst); 1467 1468 return --(instList.end()); 1469} 1470 1471template <class Impl> 1472void 1473FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst) 1474{ 1475 // Keep an instruction count. 1476 if (!inst->isMicroop() || inst->isLastMicroop()) { 1477 thread[tid]->numInst++; 1478 thread[tid]->numInsts++; 1479 committedInsts[tid]++; 1480 totalCommittedInsts++; 1481 } 1482 thread[tid]->numOp++; 1483 thread[tid]->numOps++; 1484 committedOps[tid]++; 1485 1486 system->totalNumInsts++; 1487 // Check for instruction-count-based events. 1488 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst); 1489 system->instEventQueue.serviceEvents(system->totalNumInsts); 1490} 1491 1492template <class Impl> 1493void 1494FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst) 1495{ 1496 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s " 1497 "[sn:%lli]\n", 1498 inst->threadNumber, inst->pcState(), inst->seqNum); 1499 1500 removeInstsThisCycle = true; 1501 1502 // Remove the front instruction. 1503 removeList.push(inst->getInstListIt()); 1504} 1505 1506template <class Impl> 1507void 1508FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid) 1509{ 1510 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction" 1511 " list.\n", tid); 1512 1513 ListIt end_it; 1514 1515 bool rob_empty = false; 1516 1517 if (instList.empty()) { 1518 return; 1519 } else if (rob.isEmpty(/*tid*/)) { 1520 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n"); 1521 end_it = instList.begin(); 1522 rob_empty = true; 1523 } else { 1524 end_it = (rob.readTailInst(tid))->getInstListIt(); 1525 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n"); 1526 } 1527 1528 removeInstsThisCycle = true; 1529 1530 ListIt inst_it = instList.end(); 1531 1532 inst_it--; 1533 1534 // Walk through the instruction list, removing any instructions 1535 // that were inserted after the given instruction iterator, end_it. 1536 while (inst_it != end_it) { 1537 assert(!instList.empty()); 1538 1539 squashInstIt(inst_it, tid); 1540 1541 inst_it--; 1542 } 1543 1544 // If the ROB was empty, then we actually need to remove the first 1545 // instruction as well. 1546 if (rob_empty) { 1547 squashInstIt(inst_it, tid); 1548 } 1549} 1550 1551template <class Impl> 1552void 1553FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid) 1554{ 1555 assert(!instList.empty()); 1556 1557 removeInstsThisCycle = true; 1558 1559 ListIt inst_iter = instList.end(); 1560 1561 inst_iter--; 1562 1563 DPRINTF(O3CPU, "Deleting instructions from instruction " 1564 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n", 1565 tid, seq_num, (*inst_iter)->seqNum); 1566 1567 while ((*inst_iter)->seqNum > seq_num) { 1568 1569 bool break_loop = (inst_iter == instList.begin()); 1570 1571 squashInstIt(inst_iter, tid); 1572 1573 inst_iter--; 1574 1575 if (break_loop) 1576 break; 1577 } 1578} 1579 1580template <class Impl> 1581inline void 1582FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid) 1583{ 1584 if ((*instIt)->threadNumber == tid) { 1585 DPRINTF(O3CPU, "Squashing instruction, " 1586 "[tid:%i] [sn:%lli] PC %s\n", 1587 (*instIt)->threadNumber, 1588 (*instIt)->seqNum, 1589 (*instIt)->pcState()); 1590 1591 // Mark it as squashed. 1592 (*instIt)->setSquashed(); 1593 1594 // @todo: Formulate a consistent method for deleting 1595 // instructions from the instruction list 1596 // Remove the instruction from the list. 1597 removeList.push(instIt); 1598 } 1599} 1600 1601template <class Impl> 1602void 1603FullO3CPU<Impl>::cleanUpRemovedInsts() 1604{ 1605 while (!removeList.empty()) { 1606 DPRINTF(O3CPU, "Removing instruction, " 1607 "[tid:%i] [sn:%lli] PC %s\n", 1608 (*removeList.front())->threadNumber, 1609 (*removeList.front())->seqNum, 1610 (*removeList.front())->pcState()); 1611 1612 instList.erase(removeList.front()); 1613 1614 removeList.pop(); 1615 } 1616 1617 removeInstsThisCycle = false; 1618} 1619/* 1620template <class Impl> 1621void 1622FullO3CPU<Impl>::removeAllInsts() 1623{ 1624 instList.clear(); 1625} 1626*/ 1627template <class Impl> 1628void 1629FullO3CPU<Impl>::dumpInsts() 1630{ 1631 int num = 0; 1632 1633 ListIt inst_list_it = instList.begin(); 1634 1635 cprintf("Dumping Instruction List\n"); 1636 1637 while (inst_list_it != instList.end()) { 1638 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n" 1639 "Squashed:%i\n\n", 1640 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber, 1641 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(), 1642 (*inst_list_it)->isSquashed()); 1643 inst_list_it++; 1644 ++num; 1645 } 1646} 1647/* 1648template <class Impl> 1649void 1650FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst) 1651{ 1652 iew.wakeDependents(inst); 1653} 1654*/ 1655template <class Impl> 1656void 1657FullO3CPU<Impl>::wakeCPU() 1658{ 1659 if (activityRec.active() || tickEvent.scheduled()) { 1660 DPRINTF(Activity, "CPU already running.\n"); 1661 return; 1662 } 1663 1664 DPRINTF(Activity, "Waking up CPU\n"); 1665 1666 idleCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1667 numCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1668 1669 schedule(tickEvent, nextCycle()); 1670} 1671 1672template <class Impl> 1673void 1674FullO3CPU<Impl>::wakeup() 1675{ 1676 if (this->thread[0]->status() != ThreadContext::Suspended) 1677 return; 1678 1679 this->wakeCPU(); 1680 1681 DPRINTF(Quiesce, "Suspended Processor woken\n"); 1682 this->threadContexts[0]->activate(); 1683} 1684 1685template <class Impl> 1686ThreadID 1687FullO3CPU<Impl>::getFreeTid() 1688{ 1689 for (ThreadID tid = 0; tid < numThreads; tid++) { 1690 if (!tids[tid]) { 1691 tids[tid] = true; 1692 return tid; 1693 } 1694 } 1695 1696 return InvalidThreadID; 1697} 1698 1699template <class Impl> 1700void 1701FullO3CPU<Impl>::doContextSwitch() 1702{ 1703 if (contextSwitch) { 1704 1705 //ADD CODE TO DEACTIVE THREAD HERE (???) 1706 1707 ThreadID size = cpuWaitList.size(); 1708 for (ThreadID tid = 0; tid < size; tid++) { 1709 activateWhenReady(tid); 1710 } 1711 1712 if (cpuWaitList.size() == 0) 1713 contextSwitch = true; 1714 } 1715} 1716 1717template <class Impl> 1718void 1719FullO3CPU<Impl>::updateThreadPriority() 1720{ 1721 if (activeThreads.size() > 1) { 1722 //DEFAULT TO ROUND ROBIN SCHEME 1723 //e.g. Move highest priority to end of thread list 1724 list<ThreadID>::iterator list_begin = activeThreads.begin(); 1725 1726 unsigned high_thread = *list_begin; 1727 1728 activeThreads.erase(list_begin); 1729 1730 activeThreads.push_back(high_thread); 1731 } 1732} 1733 1734// Forward declaration of FullO3CPU. 1735template class FullO3CPU<O3CPUImpl>; 1736