cpu.cc revision 9920
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, 234 params->numROBEntries, params->squashWidth, 235 params->smtROBPolicy, params->smtROBThreshold, 236 params->numThreads), 237 238 scoreboard(name() + ".scoreboard", 239 regFile.totalNumPhysRegs(), TheISA::NumMiscRegs, 240 TheISA::ZeroReg, TheISA::ZeroReg), 241 242 isa(numThreads, NULL), 243 244 icachePort(&fetch, this), 245 dcachePort(&iew.ldstQueue, this), 246 247 timeBuffer(params->backComSize, params->forwardComSize), 248 fetchQueue(params->backComSize, params->forwardComSize), 249 decodeQueue(params->backComSize, params->forwardComSize), 250 renameQueue(params->backComSize, params->forwardComSize), 251 iewQueue(params->backComSize, params->forwardComSize), 252 activityRec(name(), NumStages, 253 params->backComSize + params->forwardComSize, 254 params->activity), 255 256 globalSeqNum(1), 257 system(params->system), 258 drainManager(NULL), 259 lastRunningCycle(curCycle()) 260{ 261 if (!params->switched_out) { 262 _status = Running; 263 } else { 264 _status = SwitchedOut; 265 } 266 267 if (params->checker) { 268 BaseCPU *temp_checker = params->checker; 269 checker = dynamic_cast<Checker<Impl> *>(temp_checker); 270 checker->setIcachePort(&icachePort); 271 checker->setSystem(params->system); 272 } else { 273 checker = NULL; 274 } 275 276 if (!FullSystem) { 277 thread.resize(numThreads); 278 tids.resize(numThreads); 279 } 280 281 // The stages also need their CPU pointer setup. However this 282 // must be done at the upper level CPU because they have pointers 283 // to the upper level CPU, and not this FullO3CPU. 284 285 // Set up Pointers to the activeThreads list for each stage 286 fetch.setActiveThreads(&activeThreads); 287 decode.setActiveThreads(&activeThreads); 288 rename.setActiveThreads(&activeThreads); 289 iew.setActiveThreads(&activeThreads); 290 commit.setActiveThreads(&activeThreads); 291 292 // Give each of the stages the time buffer they will use. 293 fetch.setTimeBuffer(&timeBuffer); 294 decode.setTimeBuffer(&timeBuffer); 295 rename.setTimeBuffer(&timeBuffer); 296 iew.setTimeBuffer(&timeBuffer); 297 commit.setTimeBuffer(&timeBuffer); 298 299 // Also setup each of the stages' queues. 300 fetch.setFetchQueue(&fetchQueue); 301 decode.setFetchQueue(&fetchQueue); 302 commit.setFetchQueue(&fetchQueue); 303 decode.setDecodeQueue(&decodeQueue); 304 rename.setDecodeQueue(&decodeQueue); 305 rename.setRenameQueue(&renameQueue); 306 iew.setRenameQueue(&renameQueue); 307 iew.setIEWQueue(&iewQueue); 308 commit.setIEWQueue(&iewQueue); 309 commit.setRenameQueue(&renameQueue); 310 311 commit.setIEWStage(&iew); 312 rename.setIEWStage(&iew); 313 rename.setCommitStage(&commit); 314 315 ThreadID active_threads; 316 if (FullSystem) { 317 active_threads = 1; 318 } else { 319 active_threads = params->workload.size(); 320 321 if (active_threads > Impl::MaxThreads) { 322 panic("Workload Size too large. Increase the 'MaxThreads' " 323 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) " 324 "or edit your workload size."); 325 } 326 } 327 328 //Make Sure That this a Valid Architeture 329 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs); 330 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs); 331 assert(params->numPhysCCRegs >= numThreads * TheISA::NumCCRegs); 332 333 rename.setScoreboard(&scoreboard); 334 iew.setScoreboard(&scoreboard); 335 336 // Setup the rename map for whichever stages need it. 337 for (ThreadID tid = 0; tid < numThreads; tid++) { 338 isa[tid] = params->isa[tid]; 339 340 // Only Alpha has an FP zero register, so for other ISAs we 341 // use an invalid FP register index to avoid special treatment 342 // of any valid FP reg. 343 RegIndex invalidFPReg = TheISA::NumFloatRegs + 1; 344 RegIndex fpZeroReg = 345 (THE_ISA == ALPHA_ISA) ? TheISA::ZeroReg : invalidFPReg; 346 347 commitRenameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg, 348 &freeList); 349 350 renameMap[tid].init(®File, TheISA::ZeroReg, fpZeroReg, 351 &freeList); 352 353 activateThreadEvent[tid].init(tid, this); 354 deallocateContextEvent[tid].init(tid, this); 355 } 356 357 // Initialize rename map to assign physical registers to the 358 // architectural registers for active threads only. 359 for (ThreadID tid = 0; tid < active_threads; tid++) { 360 for (RegIndex ridx = 0; ridx < TheISA::NumIntRegs; ++ridx) { 361 // Note that we can't use the rename() method because we don't 362 // want special treatment for the zero register at this point 363 PhysRegIndex phys_reg = freeList.getIntReg(); 364 renameMap[tid].setIntEntry(ridx, phys_reg); 365 commitRenameMap[tid].setIntEntry(ridx, phys_reg); 366 } 367 368 for (RegIndex ridx = 0; ridx < TheISA::NumFloatRegs; ++ridx) { 369 PhysRegIndex phys_reg = freeList.getFloatReg(); 370 renameMap[tid].setFloatEntry(ridx, phys_reg); 371 commitRenameMap[tid].setFloatEntry(ridx, phys_reg); 372 } 373 374 for (RegIndex ridx = 0; ridx < TheISA::NumCCRegs; ++ridx) { 375 PhysRegIndex phys_reg = freeList.getCCReg(); 376 renameMap[tid].setCCEntry(ridx, phys_reg); 377 commitRenameMap[tid].setCCEntry(ridx, phys_reg); 378 } 379 } 380 381 rename.setRenameMap(renameMap); 382 commit.setRenameMap(commitRenameMap); 383 rename.setFreeList(&freeList); 384 385 // Setup the ROB for whichever stages need it. 386 commit.setROB(&rob); 387 388 lastActivatedCycle = 0; 389#if 0 390 // Give renameMap & rename stage access to the freeList; 391 for (ThreadID tid = 0; tid < numThreads; tid++) 392 globalSeqNum[tid] = 1; 393#endif 394 395 contextSwitch = false; 396 DPRINTF(O3CPU, "Creating O3CPU object.\n"); 397 398 // Setup any thread state. 399 this->thread.resize(this->numThreads); 400 401 for (ThreadID tid = 0; tid < this->numThreads; ++tid) { 402 if (FullSystem) { 403 // SMT is not supported in FS mode yet. 404 assert(this->numThreads == 1); 405 this->thread[tid] = new Thread(this, 0, NULL); 406 } else { 407 if (tid < params->workload.size()) { 408 DPRINTF(O3CPU, "Workload[%i] process is %#x", 409 tid, this->thread[tid]); 410 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 411 (typename Impl::O3CPU *)(this), 412 tid, params->workload[tid]); 413 414 //usedTids[tid] = true; 415 //threadMap[tid] = tid; 416 } else { 417 //Allocate Empty thread so M5 can use later 418 //when scheduling threads to CPU 419 Process* dummy_proc = NULL; 420 421 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 422 (typename Impl::O3CPU *)(this), 423 tid, dummy_proc); 424 //usedTids[tid] = false; 425 } 426 } 427 428 ThreadContext *tc; 429 430 // Setup the TC that will serve as the interface to the threads/CPU. 431 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>; 432 433 tc = o3_tc; 434 435 // If we're using a checker, then the TC should be the 436 // CheckerThreadContext. 437 if (params->checker) { 438 tc = new CheckerThreadContext<O3ThreadContext<Impl> >( 439 o3_tc, this->checker); 440 } 441 442 o3_tc->cpu = (typename Impl::O3CPU *)(this); 443 assert(o3_tc->cpu); 444 o3_tc->thread = this->thread[tid]; 445 446 if (FullSystem) { 447 // Setup quiesce event. 448 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc); 449 } 450 // Give the thread the TC. 451 this->thread[tid]->tc = tc; 452 453 // Add the TC to the CPU's list of TC's. 454 this->threadContexts.push_back(tc); 455 } 456 457 // FullO3CPU always requires an interrupt controller. 458 if (!params->switched_out && !interrupts) { 459 fatal("FullO3CPU %s has no interrupt controller.\n" 460 "Ensure createInterruptController() is called.\n", name()); 461 } 462 463 for (ThreadID tid = 0; tid < this->numThreads; tid++) 464 this->thread[tid]->setFuncExeInst(0); 465} 466 467template <class Impl> 468FullO3CPU<Impl>::~FullO3CPU() 469{ 470} 471 472template <class Impl> 473void 474FullO3CPU<Impl>::regStats() 475{ 476 BaseO3CPU::regStats(); 477 478 // Register any of the O3CPU's stats here. 479 timesIdled 480 .name(name() + ".timesIdled") 481 .desc("Number of times that the entire CPU went into an idle state and" 482 " unscheduled itself") 483 .prereq(timesIdled); 484 485 idleCycles 486 .name(name() + ".idleCycles") 487 .desc("Total number of cycles that the CPU has spent unscheduled due " 488 "to idling") 489 .prereq(idleCycles); 490 491 quiesceCycles 492 .name(name() + ".quiesceCycles") 493 .desc("Total number of cycles that CPU has spent quiesced or waiting " 494 "for an interrupt") 495 .prereq(quiesceCycles); 496 497 // Number of Instructions simulated 498 // -------------------------------- 499 // Should probably be in Base CPU but need templated 500 // MaxThreads so put in here instead 501 committedInsts 502 .init(numThreads) 503 .name(name() + ".committedInsts") 504 .desc("Number of Instructions Simulated"); 505 506 committedOps 507 .init(numThreads) 508 .name(name() + ".committedOps") 509 .desc("Number of Ops (including micro ops) Simulated"); 510 511 totalCommittedInsts 512 .name(name() + ".committedInsts_total") 513 .desc("Number of Instructions Simulated"); 514 515 cpi 516 .name(name() + ".cpi") 517 .desc("CPI: Cycles Per Instruction") 518 .precision(6); 519 cpi = numCycles / committedInsts; 520 521 totalCpi 522 .name(name() + ".cpi_total") 523 .desc("CPI: Total CPI of All Threads") 524 .precision(6); 525 totalCpi = numCycles / totalCommittedInsts; 526 527 ipc 528 .name(name() + ".ipc") 529 .desc("IPC: Instructions Per Cycle") 530 .precision(6); 531 ipc = committedInsts / numCycles; 532 533 totalIpc 534 .name(name() + ".ipc_total") 535 .desc("IPC: Total IPC of All Threads") 536 .precision(6); 537 totalIpc = totalCommittedInsts / numCycles; 538 539 this->fetch.regStats(); 540 this->decode.regStats(); 541 this->rename.regStats(); 542 this->iew.regStats(); 543 this->commit.regStats(); 544 this->rob.regStats(); 545 546 intRegfileReads 547 .name(name() + ".int_regfile_reads") 548 .desc("number of integer regfile reads") 549 .prereq(intRegfileReads); 550 551 intRegfileWrites 552 .name(name() + ".int_regfile_writes") 553 .desc("number of integer regfile writes") 554 .prereq(intRegfileWrites); 555 556 fpRegfileReads 557 .name(name() + ".fp_regfile_reads") 558 .desc("number of floating regfile reads") 559 .prereq(fpRegfileReads); 560 561 fpRegfileWrites 562 .name(name() + ".fp_regfile_writes") 563 .desc("number of floating regfile writes") 564 .prereq(fpRegfileWrites); 565 566 ccRegfileReads 567 .name(name() + ".cc_regfile_reads") 568 .desc("number of cc regfile reads") 569 .prereq(ccRegfileReads); 570 571 ccRegfileWrites 572 .name(name() + ".cc_regfile_writes") 573 .desc("number of cc regfile writes") 574 .prereq(ccRegfileWrites); 575 576 miscRegfileReads 577 .name(name() + ".misc_regfile_reads") 578 .desc("number of misc regfile reads") 579 .prereq(miscRegfileReads); 580 581 miscRegfileWrites 582 .name(name() + ".misc_regfile_writes") 583 .desc("number of misc regfile writes") 584 .prereq(miscRegfileWrites); 585} 586 587template <class Impl> 588void 589FullO3CPU<Impl>::tick() 590{ 591 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n"); 592 assert(!switchedOut()); 593 assert(getDrainState() != Drainable::Drained); 594 595 ++numCycles; 596 597// activity = false; 598 599 //Tick each of the stages 600 fetch.tick(); 601 602 decode.tick(); 603 604 rename.tick(); 605 606 iew.tick(); 607 608 commit.tick(); 609 610 if (!FullSystem) 611 doContextSwitch(); 612 613 // Now advance the time buffers 614 timeBuffer.advance(); 615 616 fetchQueue.advance(); 617 decodeQueue.advance(); 618 renameQueue.advance(); 619 iewQueue.advance(); 620 621 activityRec.advance(); 622 623 if (removeInstsThisCycle) { 624 cleanUpRemovedInsts(); 625 } 626 627 if (!tickEvent.scheduled()) { 628 if (_status == SwitchedOut) { 629 DPRINTF(O3CPU, "Switched out!\n"); 630 // increment stat 631 lastRunningCycle = curCycle(); 632 } else if (!activityRec.active() || _status == Idle) { 633 DPRINTF(O3CPU, "Idle!\n"); 634 lastRunningCycle = curCycle(); 635 timesIdled++; 636 } else { 637 schedule(tickEvent, clockEdge(Cycles(1))); 638 DPRINTF(O3CPU, "Scheduling next tick!\n"); 639 } 640 } 641 642 if (!FullSystem) 643 updateThreadPriority(); 644 645 tryDrain(); 646} 647 648template <class Impl> 649void 650FullO3CPU<Impl>::init() 651{ 652 BaseCPU::init(); 653 654 for (ThreadID tid = 0; tid < numThreads; ++tid) { 655 // Set noSquashFromTC so that the CPU doesn't squash when initially 656 // setting up registers. 657 thread[tid]->noSquashFromTC = true; 658 // Initialise the ThreadContext's memory proxies 659 thread[tid]->initMemProxies(thread[tid]->getTC()); 660 } 661 662 if (FullSystem && !params()->switched_out) { 663 for (ThreadID tid = 0; tid < numThreads; tid++) { 664 ThreadContext *src_tc = threadContexts[tid]; 665 TheISA::initCPU(src_tc, src_tc->contextId()); 666 } 667 } 668 669 // Clear noSquashFromTC. 670 for (int tid = 0; tid < numThreads; ++tid) 671 thread[tid]->noSquashFromTC = false; 672 673 commit.setThreads(thread); 674} 675 676template <class Impl> 677void 678FullO3CPU<Impl>::startup() 679{ 680 for (int tid = 0; tid < numThreads; ++tid) 681 isa[tid]->startup(threadContexts[tid]); 682 683 fetch.startupStage(); 684 decode.startupStage(); 685 iew.startupStage(); 686 rename.startupStage(); 687 commit.startupStage(); 688} 689 690template <class Impl> 691void 692FullO3CPU<Impl>::activateThread(ThreadID tid) 693{ 694 list<ThreadID>::iterator isActive = 695 std::find(activeThreads.begin(), activeThreads.end(), tid); 696 697 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid); 698 assert(!switchedOut()); 699 700 if (isActive == activeThreads.end()) { 701 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n", 702 tid); 703 704 activeThreads.push_back(tid); 705 } 706} 707 708template <class Impl> 709void 710FullO3CPU<Impl>::deactivateThread(ThreadID tid) 711{ 712 //Remove From Active List, if Active 713 list<ThreadID>::iterator thread_it = 714 std::find(activeThreads.begin(), activeThreads.end(), tid); 715 716 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid); 717 assert(!switchedOut()); 718 719 if (thread_it != activeThreads.end()) { 720 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n", 721 tid); 722 activeThreads.erase(thread_it); 723 } 724} 725 726template <class Impl> 727Counter 728FullO3CPU<Impl>::totalInsts() const 729{ 730 Counter total(0); 731 732 ThreadID size = thread.size(); 733 for (ThreadID i = 0; i < size; i++) 734 total += thread[i]->numInst; 735 736 return total; 737} 738 739template <class Impl> 740Counter 741FullO3CPU<Impl>::totalOps() const 742{ 743 Counter total(0); 744 745 ThreadID size = thread.size(); 746 for (ThreadID i = 0; i < size; i++) 747 total += thread[i]->numOp; 748 749 return total; 750} 751 752template <class Impl> 753void 754FullO3CPU<Impl>::activateContext(ThreadID tid, Cycles delay) 755{ 756 assert(!switchedOut()); 757 758 // Needs to set each stage to running as well. 759 if (delay){ 760 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate " 761 "on cycle %d\n", tid, clockEdge(delay)); 762 scheduleActivateThreadEvent(tid, delay); 763 } else { 764 activateThread(tid); 765 } 766 767 // We don't want to wake the CPU if it is drained. In that case, 768 // we just want to flag the thread as active and schedule the tick 769 // event from drainResume() instead. 770 if (getDrainState() == Drainable::Drained) 771 return; 772 773 // If we are time 0 or if the last activation time is in the past, 774 // schedule the next tick and wake up the fetch unit 775 if (lastActivatedCycle == 0 || lastActivatedCycle < curTick()) { 776 scheduleTickEvent(delay); 777 778 // Be sure to signal that there's some activity so the CPU doesn't 779 // deschedule itself. 780 activityRec.activity(); 781 fetch.wakeFromQuiesce(); 782 783 Cycles cycles(curCycle() - lastRunningCycle); 784 // @todo: This is an oddity that is only here to match the stats 785 if (cycles != 0) 786 --cycles; 787 quiesceCycles += cycles; 788 789 lastActivatedCycle = curTick(); 790 791 _status = Running; 792 } 793} 794 795template <class Impl> 796bool 797FullO3CPU<Impl>::scheduleDeallocateContext(ThreadID tid, bool remove, 798 Cycles delay) 799{ 800 // Schedule removal of thread data from CPU 801 if (delay){ 802 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate " 803 "on tick %d\n", tid, clockEdge(delay)); 804 scheduleDeallocateContextEvent(tid, remove, delay); 805 return false; 806 } else { 807 deactivateThread(tid); 808 if (remove) 809 removeThread(tid); 810 return true; 811 } 812} 813 814template <class Impl> 815void 816FullO3CPU<Impl>::suspendContext(ThreadID tid) 817{ 818 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid); 819 assert(!switchedOut()); 820 bool deallocated = scheduleDeallocateContext(tid, false, Cycles(1)); 821 // If this was the last thread then unschedule the tick event. 822 if ((activeThreads.size() == 1 && !deallocated) || 823 activeThreads.size() == 0) 824 unscheduleTickEvent(); 825 826 DPRINTF(Quiesce, "Suspending Context\n"); 827 lastRunningCycle = curCycle(); 828 _status = Idle; 829} 830 831template <class Impl> 832void 833FullO3CPU<Impl>::haltContext(ThreadID tid) 834{ 835 //For now, this is the same as deallocate 836 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid); 837 assert(!switchedOut()); 838 scheduleDeallocateContext(tid, true, Cycles(1)); 839} 840 841template <class Impl> 842void 843FullO3CPU<Impl>::insertThread(ThreadID tid) 844{ 845 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU"); 846 // Will change now that the PC and thread state is internal to the CPU 847 // and not in the ThreadContext. 848 ThreadContext *src_tc; 849 if (FullSystem) 850 src_tc = system->threadContexts[tid]; 851 else 852 src_tc = tcBase(tid); 853 854 //Bind Int Regs to Rename Map 855 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 856 PhysRegIndex phys_reg = freeList.getIntReg(); 857 858 renameMap[tid].setEntry(ireg,phys_reg); 859 scoreboard.setReg(phys_reg); 860 } 861 862 //Bind Float Regs to Rename Map 863 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 864 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) { 865 PhysRegIndex phys_reg = freeList.getFloatReg(); 866 867 renameMap[tid].setEntry(freg,phys_reg); 868 scoreboard.setReg(phys_reg); 869 } 870 871 //Bind condition-code Regs to Rename Map 872 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs; 873 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 874 creg < max_reg; creg++) { 875 PhysRegIndex phys_reg = freeList.getCCReg(); 876 877 renameMap[tid].setEntry(creg,phys_reg); 878 scoreboard.setReg(phys_reg); 879 } 880 881 //Copy Thread Data Into RegFile 882 //this->copyFromTC(tid); 883 884 //Set PC/NPC/NNPC 885 pcState(src_tc->pcState(), tid); 886 887 src_tc->setStatus(ThreadContext::Active); 888 889 activateContext(tid, Cycles(1)); 890 891 //Reset ROB/IQ/LSQ Entries 892 commit.rob->resetEntries(); 893 iew.resetEntries(); 894} 895 896template <class Impl> 897void 898FullO3CPU<Impl>::removeThread(ThreadID tid) 899{ 900 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid); 901 902 // Copy Thread Data From RegFile 903 // If thread is suspended, it might be re-allocated 904 // this->copyToTC(tid); 905 906 907 // @todo: 2-27-2008: Fix how we free up rename mappings 908 // here to alleviate the case for double-freeing registers 909 // in SMT workloads. 910 911 // Unbind Int Regs from Rename Map 912 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 913 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg); 914 915 scoreboard.unsetReg(phys_reg); 916 freeList.addReg(phys_reg); 917 } 918 919 // Unbind Float Regs from Rename Map 920 int max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 921 for (int freg = TheISA::NumIntRegs; freg < max_reg; freg++) { 922 PhysRegIndex phys_reg = renameMap[tid].lookup(freg); 923 924 scoreboard.unsetReg(phys_reg); 925 freeList.addReg(phys_reg); 926 } 927 928 // Unbind condition-code Regs from Rename Map 929 max_reg = TheISA::NumIntRegs + TheISA::NumFloatRegs + TheISA::NumCCRegs; 930 for (int creg = TheISA::NumIntRegs + TheISA::NumFloatRegs; 931 creg < max_reg; creg++) { 932 PhysRegIndex phys_reg = renameMap[tid].lookup(creg); 933 934 scoreboard.unsetReg(phys_reg); 935 freeList.addReg(phys_reg); 936 } 937 938 // Squash Throughout Pipeline 939 DynInstPtr inst = commit.rob->readHeadInst(tid); 940 InstSeqNum squash_seq_num = inst->seqNum; 941 fetch.squash(0, squash_seq_num, inst, tid); 942 decode.squash(tid); 943 rename.squash(squash_seq_num, tid); 944 iew.squash(tid); 945 iew.ldstQueue.squash(squash_seq_num, tid); 946 commit.rob->squash(squash_seq_num, tid); 947 948 949 assert(iew.instQueue.getCount(tid) == 0); 950 assert(iew.ldstQueue.getCount(tid) == 0); 951 952 // Reset ROB/IQ/LSQ Entries 953 954 // Commented out for now. This should be possible to do by 955 // telling all the pipeline stages to drain first, and then 956 // checking until the drain completes. Once the pipeline is 957 // drained, call resetEntries(). - 10-09-06 ktlim 958/* 959 if (activeThreads.size() >= 1) { 960 commit.rob->resetEntries(); 961 iew.resetEntries(); 962 } 963*/ 964} 965 966 967template <class Impl> 968void 969FullO3CPU<Impl>::activateWhenReady(ThreadID tid) 970{ 971 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming" 972 "(e.g. PhysRegs/ROB/IQ/LSQ) \n", 973 tid); 974 975 bool ready = true; 976 977 // Should these all be '<' not '>='? This seems backwards... 978 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) { 979 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 980 "Phys. Int. Regs.\n", 981 tid); 982 ready = false; 983 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) { 984 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 985 "Phys. Float. Regs.\n", 986 tid); 987 ready = false; 988 } else if (freeList.numFreeCCRegs() >= TheISA::NumCCRegs) { 989 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 990 "Phys. CC. Regs.\n", 991 tid); 992 ready = false; 993 } else if (commit.rob->numFreeEntries() >= 994 commit.rob->entryAmount(activeThreads.size() + 1)) { 995 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 996 "ROB entries.\n", 997 tid); 998 ready = false; 999 } else if (iew.instQueue.numFreeEntries() >= 1000 iew.instQueue.entryAmount(activeThreads.size() + 1)) { 1001 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 1002 "IQ entries.\n", 1003 tid); 1004 ready = false; 1005 } else if (iew.ldstQueue.numFreeEntries() >= 1006 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) { 1007 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 1008 "LSQ entries.\n", 1009 tid); 1010 ready = false; 1011 } 1012 1013 if (ready) { 1014 insertThread(tid); 1015 1016 contextSwitch = false; 1017 1018 cpuWaitList.remove(tid); 1019 } else { 1020 suspendContext(tid); 1021 1022 //blocks fetch 1023 contextSwitch = true; 1024 1025 //@todo: dont always add to waitlist 1026 //do waitlist 1027 cpuWaitList.push_back(tid); 1028 } 1029} 1030 1031template <class Impl> 1032Fault 1033FullO3CPU<Impl>::hwrei(ThreadID tid) 1034{ 1035#if THE_ISA == ALPHA_ISA 1036 // Need to clear the lock flag upon returning from an interrupt. 1037 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid); 1038 1039 this->thread[tid]->kernelStats->hwrei(); 1040 1041 // FIXME: XXX check for interrupts? XXX 1042#endif 1043 return NoFault; 1044} 1045 1046template <class Impl> 1047bool 1048FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid) 1049{ 1050#if THE_ISA == ALPHA_ISA 1051 if (this->thread[tid]->kernelStats) 1052 this->thread[tid]->kernelStats->callpal(palFunc, 1053 this->threadContexts[tid]); 1054 1055 switch (palFunc) { 1056 case PAL::halt: 1057 halt(); 1058 if (--System::numSystemsRunning == 0) 1059 exitSimLoop("all cpus halted"); 1060 break; 1061 1062 case PAL::bpt: 1063 case PAL::bugchk: 1064 if (this->system->breakpoint()) 1065 return false; 1066 break; 1067 } 1068#endif 1069 return true; 1070} 1071 1072template <class Impl> 1073Fault 1074FullO3CPU<Impl>::getInterrupts() 1075{ 1076 // Check if there are any outstanding interrupts 1077 return this->interrupts->getInterrupt(this->threadContexts[0]); 1078} 1079 1080template <class Impl> 1081void 1082FullO3CPU<Impl>::processInterrupts(Fault interrupt) 1083{ 1084 // Check for interrupts here. For now can copy the code that 1085 // exists within isa_fullsys_traits.hh. Also assume that thread 0 1086 // is the one that handles the interrupts. 1087 // @todo: Possibly consolidate the interrupt checking code. 1088 // @todo: Allow other threads to handle interrupts. 1089 1090 assert(interrupt != NoFault); 1091 this->interrupts->updateIntrInfo(this->threadContexts[0]); 1092 1093 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name()); 1094 this->trap(interrupt, 0, NULL); 1095} 1096 1097template <class Impl> 1098void 1099FullO3CPU<Impl>::trap(Fault fault, ThreadID tid, StaticInstPtr inst) 1100{ 1101 // Pass the thread's TC into the invoke method. 1102 fault->invoke(this->threadContexts[tid], inst); 1103} 1104 1105template <class Impl> 1106void 1107FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid) 1108{ 1109 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid); 1110 1111 DPRINTF(Activity,"Activity: syscall() called.\n"); 1112 1113 // Temporarily increase this by one to account for the syscall 1114 // instruction. 1115 ++(this->thread[tid]->funcExeInst); 1116 1117 // Execute the actual syscall. 1118 this->thread[tid]->syscall(callnum); 1119 1120 // Decrease funcExeInst by one as the normal commit will handle 1121 // incrementing it. 1122 --(this->thread[tid]->funcExeInst); 1123} 1124 1125template <class Impl> 1126void 1127FullO3CPU<Impl>::serializeThread(std::ostream &os, ThreadID tid) 1128{ 1129 thread[tid]->serialize(os); 1130} 1131 1132template <class Impl> 1133void 1134FullO3CPU<Impl>::unserializeThread(Checkpoint *cp, const std::string §ion, 1135 ThreadID tid) 1136{ 1137 thread[tid]->unserialize(cp, section); 1138} 1139 1140template <class Impl> 1141unsigned int 1142FullO3CPU<Impl>::drain(DrainManager *drain_manager) 1143{ 1144 // If the CPU isn't doing anything, then return immediately. 1145 if (switchedOut()) { 1146 setDrainState(Drainable::Drained); 1147 return 0; 1148 } 1149 1150 DPRINTF(Drain, "Draining...\n"); 1151 setDrainState(Drainable::Draining); 1152 1153 // We only need to signal a drain to the commit stage as this 1154 // initiates squashing controls the draining. Once the commit 1155 // stage commits an instruction where it is safe to stop, it'll 1156 // squash the rest of the instructions in the pipeline and force 1157 // the fetch stage to stall. The pipeline will be drained once all 1158 // in-flight instructions have retired. 1159 commit.drain(); 1160 1161 // Wake the CPU and record activity so everything can drain out if 1162 // the CPU was not able to immediately drain. 1163 if (!isDrained()) { 1164 drainManager = drain_manager; 1165 1166 wakeCPU(); 1167 activityRec.activity(); 1168 1169 DPRINTF(Drain, "CPU not drained\n"); 1170 1171 return 1; 1172 } else { 1173 setDrainState(Drainable::Drained); 1174 DPRINTF(Drain, "CPU is already drained\n"); 1175 if (tickEvent.scheduled()) 1176 deschedule(tickEvent); 1177 1178 // Flush out any old data from the time buffers. In 1179 // particular, there might be some data in flight from the 1180 // fetch stage that isn't visible in any of the CPU buffers we 1181 // test in isDrained(). 1182 for (int i = 0; i < timeBuffer.getSize(); ++i) { 1183 timeBuffer.advance(); 1184 fetchQueue.advance(); 1185 decodeQueue.advance(); 1186 renameQueue.advance(); 1187 iewQueue.advance(); 1188 } 1189 1190 drainSanityCheck(); 1191 return 0; 1192 } 1193} 1194 1195template <class Impl> 1196bool 1197FullO3CPU<Impl>::tryDrain() 1198{ 1199 if (!drainManager || !isDrained()) 1200 return false; 1201 1202 if (tickEvent.scheduled()) 1203 deschedule(tickEvent); 1204 1205 DPRINTF(Drain, "CPU done draining, processing drain event\n"); 1206 drainManager->signalDrainDone(); 1207 drainManager = NULL; 1208 1209 return true; 1210} 1211 1212template <class Impl> 1213void 1214FullO3CPU<Impl>::drainSanityCheck() const 1215{ 1216 assert(isDrained()); 1217 fetch.drainSanityCheck(); 1218 decode.drainSanityCheck(); 1219 rename.drainSanityCheck(); 1220 iew.drainSanityCheck(); 1221 commit.drainSanityCheck(); 1222} 1223 1224template <class Impl> 1225bool 1226FullO3CPU<Impl>::isDrained() const 1227{ 1228 bool drained(true); 1229 1230 for (ThreadID i = 0; i < thread.size(); ++i) { 1231 if (activateThreadEvent[i].scheduled()) { 1232 DPRINTF(Drain, "CPU not drained, tread %i has a " 1233 "pending activate event\n", i); 1234 drained = false; 1235 } 1236 if (deallocateContextEvent[i].scheduled()) { 1237 DPRINTF(Drain, "CPU not drained, tread %i has a " 1238 "pending deallocate context event\n", i); 1239 drained = false; 1240 } 1241 } 1242 1243 if (!instList.empty() || !removeList.empty()) { 1244 DPRINTF(Drain, "Main CPU structures not drained.\n"); 1245 drained = false; 1246 } 1247 1248 if (!fetch.isDrained()) { 1249 DPRINTF(Drain, "Fetch not drained.\n"); 1250 drained = false; 1251 } 1252 1253 if (!decode.isDrained()) { 1254 DPRINTF(Drain, "Decode not drained.\n"); 1255 drained = false; 1256 } 1257 1258 if (!rename.isDrained()) { 1259 DPRINTF(Drain, "Rename not drained.\n"); 1260 drained = false; 1261 } 1262 1263 if (!iew.isDrained()) { 1264 DPRINTF(Drain, "IEW not drained.\n"); 1265 drained = false; 1266 } 1267 1268 if (!commit.isDrained()) { 1269 DPRINTF(Drain, "Commit not drained.\n"); 1270 drained = false; 1271 } 1272 1273 return drained; 1274} 1275 1276template <class Impl> 1277void 1278FullO3CPU<Impl>::commitDrained(ThreadID tid) 1279{ 1280 fetch.drainStall(tid); 1281} 1282 1283template <class Impl> 1284void 1285FullO3CPU<Impl>::drainResume() 1286{ 1287 setDrainState(Drainable::Running); 1288 if (switchedOut()) 1289 return; 1290 1291 DPRINTF(Drain, "Resuming...\n"); 1292 verifyMemoryMode(); 1293 1294 fetch.drainResume(); 1295 commit.drainResume(); 1296 1297 _status = Idle; 1298 for (ThreadID i = 0; i < thread.size(); i++) { 1299 if (thread[i]->status() == ThreadContext::Active) { 1300 DPRINTF(Drain, "Activating thread: %i\n", i); 1301 activateThread(i); 1302 _status = Running; 1303 } 1304 } 1305 1306 assert(!tickEvent.scheduled()); 1307 if (_status == Running) 1308 schedule(tickEvent, nextCycle()); 1309} 1310 1311template <class Impl> 1312void 1313FullO3CPU<Impl>::switchOut() 1314{ 1315 DPRINTF(O3CPU, "Switching out\n"); 1316 BaseCPU::switchOut(); 1317 1318 activityRec.reset(); 1319 1320 _status = SwitchedOut; 1321 1322 if (checker) 1323 checker->switchOut(); 1324} 1325 1326template <class Impl> 1327void 1328FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU) 1329{ 1330 BaseCPU::takeOverFrom(oldCPU); 1331 1332 fetch.takeOverFrom(); 1333 decode.takeOverFrom(); 1334 rename.takeOverFrom(); 1335 iew.takeOverFrom(); 1336 commit.takeOverFrom(); 1337 1338 assert(!tickEvent.scheduled()); 1339 1340 FullO3CPU<Impl> *oldO3CPU = dynamic_cast<FullO3CPU<Impl>*>(oldCPU); 1341 if (oldO3CPU) 1342 globalSeqNum = oldO3CPU->globalSeqNum; 1343 1344 lastRunningCycle = curCycle(); 1345 _status = Idle; 1346} 1347 1348template <class Impl> 1349void 1350FullO3CPU<Impl>::verifyMemoryMode() const 1351{ 1352 if (!system->isTimingMode()) { 1353 fatal("The O3 CPU requires the memory system to be in " 1354 "'timing' mode.\n"); 1355 } 1356} 1357 1358template <class Impl> 1359TheISA::MiscReg 1360FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) 1361{ 1362 return this->isa[tid]->readMiscRegNoEffect(misc_reg); 1363} 1364 1365template <class Impl> 1366TheISA::MiscReg 1367FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid) 1368{ 1369 miscRegfileReads++; 1370 return this->isa[tid]->readMiscReg(misc_reg, tcBase(tid)); 1371} 1372 1373template <class Impl> 1374void 1375FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg, 1376 const TheISA::MiscReg &val, ThreadID tid) 1377{ 1378 this->isa[tid]->setMiscRegNoEffect(misc_reg, val); 1379} 1380 1381template <class Impl> 1382void 1383FullO3CPU<Impl>::setMiscReg(int misc_reg, 1384 const TheISA::MiscReg &val, ThreadID tid) 1385{ 1386 miscRegfileWrites++; 1387 this->isa[tid]->setMiscReg(misc_reg, val, tcBase(tid)); 1388} 1389 1390template <class Impl> 1391uint64_t 1392FullO3CPU<Impl>::readIntReg(int reg_idx) 1393{ 1394 intRegfileReads++; 1395 return regFile.readIntReg(reg_idx); 1396} 1397 1398template <class Impl> 1399FloatReg 1400FullO3CPU<Impl>::readFloatReg(int reg_idx) 1401{ 1402 fpRegfileReads++; 1403 return regFile.readFloatReg(reg_idx); 1404} 1405 1406template <class Impl> 1407FloatRegBits 1408FullO3CPU<Impl>::readFloatRegBits(int reg_idx) 1409{ 1410 fpRegfileReads++; 1411 return regFile.readFloatRegBits(reg_idx); 1412} 1413 1414template <class Impl> 1415CCReg 1416FullO3CPU<Impl>::readCCReg(int reg_idx) 1417{ 1418 ccRegfileReads++; 1419 return regFile.readCCReg(reg_idx); 1420} 1421 1422template <class Impl> 1423void 1424FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val) 1425{ 1426 intRegfileWrites++; 1427 regFile.setIntReg(reg_idx, val); 1428} 1429 1430template <class Impl> 1431void 1432FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val) 1433{ 1434 fpRegfileWrites++; 1435 regFile.setFloatReg(reg_idx, val); 1436} 1437 1438template <class Impl> 1439void 1440FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val) 1441{ 1442 fpRegfileWrites++; 1443 regFile.setFloatRegBits(reg_idx, val); 1444} 1445 1446template <class Impl> 1447void 1448FullO3CPU<Impl>::setCCReg(int reg_idx, CCReg val) 1449{ 1450 ccRegfileWrites++; 1451 regFile.setCCReg(reg_idx, val); 1452} 1453 1454template <class Impl> 1455uint64_t 1456FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid) 1457{ 1458 intRegfileReads++; 1459 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx); 1460 1461 return regFile.readIntReg(phys_reg); 1462} 1463 1464template <class Impl> 1465float 1466FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid) 1467{ 1468 fpRegfileReads++; 1469 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1470 1471 return regFile.readFloatReg(phys_reg); 1472} 1473 1474template <class Impl> 1475uint64_t 1476FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid) 1477{ 1478 fpRegfileReads++; 1479 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1480 1481 return regFile.readFloatRegBits(phys_reg); 1482} 1483 1484template <class Impl> 1485CCReg 1486FullO3CPU<Impl>::readArchCCReg(int reg_idx, ThreadID tid) 1487{ 1488 ccRegfileReads++; 1489 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx); 1490 1491 return regFile.readCCReg(phys_reg); 1492} 1493 1494template <class Impl> 1495void 1496FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid) 1497{ 1498 intRegfileWrites++; 1499 PhysRegIndex phys_reg = commitRenameMap[tid].lookupInt(reg_idx); 1500 1501 regFile.setIntReg(phys_reg, val); 1502} 1503 1504template <class Impl> 1505void 1506FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid) 1507{ 1508 fpRegfileWrites++; 1509 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1510 1511 regFile.setFloatReg(phys_reg, val); 1512} 1513 1514template <class Impl> 1515void 1516FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid) 1517{ 1518 fpRegfileWrites++; 1519 PhysRegIndex phys_reg = commitRenameMap[tid].lookupFloat(reg_idx); 1520 1521 regFile.setFloatRegBits(phys_reg, val); 1522} 1523 1524template <class Impl> 1525void 1526FullO3CPU<Impl>::setArchCCReg(int reg_idx, CCReg val, ThreadID tid) 1527{ 1528 ccRegfileWrites++; 1529 PhysRegIndex phys_reg = commitRenameMap[tid].lookupCC(reg_idx); 1530 1531 regFile.setCCReg(phys_reg, val); 1532} 1533 1534template <class Impl> 1535TheISA::PCState 1536FullO3CPU<Impl>::pcState(ThreadID tid) 1537{ 1538 return commit.pcState(tid); 1539} 1540 1541template <class Impl> 1542void 1543FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid) 1544{ 1545 commit.pcState(val, tid); 1546} 1547 1548template <class Impl> 1549Addr 1550FullO3CPU<Impl>::instAddr(ThreadID tid) 1551{ 1552 return commit.instAddr(tid); 1553} 1554 1555template <class Impl> 1556Addr 1557FullO3CPU<Impl>::nextInstAddr(ThreadID tid) 1558{ 1559 return commit.nextInstAddr(tid); 1560} 1561 1562template <class Impl> 1563MicroPC 1564FullO3CPU<Impl>::microPC(ThreadID tid) 1565{ 1566 return commit.microPC(tid); 1567} 1568 1569template <class Impl> 1570void 1571FullO3CPU<Impl>::squashFromTC(ThreadID tid) 1572{ 1573 this->thread[tid]->noSquashFromTC = true; 1574 this->commit.generateTCEvent(tid); 1575} 1576 1577template <class Impl> 1578typename FullO3CPU<Impl>::ListIt 1579FullO3CPU<Impl>::addInst(DynInstPtr &inst) 1580{ 1581 instList.push_back(inst); 1582 1583 return --(instList.end()); 1584} 1585 1586template <class Impl> 1587void 1588FullO3CPU<Impl>::instDone(ThreadID tid, DynInstPtr &inst) 1589{ 1590 // Keep an instruction count. 1591 if (!inst->isMicroop() || inst->isLastMicroop()) { 1592 thread[tid]->numInst++; 1593 thread[tid]->numInsts++; 1594 committedInsts[tid]++; 1595 totalCommittedInsts++; 1596 } 1597 thread[tid]->numOp++; 1598 thread[tid]->numOps++; 1599 committedOps[tid]++; 1600 1601 system->totalNumInsts++; 1602 // Check for instruction-count-based events. 1603 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst); 1604 system->instEventQueue.serviceEvents(system->totalNumInsts); 1605} 1606 1607template <class Impl> 1608void 1609FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst) 1610{ 1611 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s " 1612 "[sn:%lli]\n", 1613 inst->threadNumber, inst->pcState(), inst->seqNum); 1614 1615 removeInstsThisCycle = true; 1616 1617 // Remove the front instruction. 1618 removeList.push(inst->getInstListIt()); 1619} 1620 1621template <class Impl> 1622void 1623FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid) 1624{ 1625 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction" 1626 " list.\n", tid); 1627 1628 ListIt end_it; 1629 1630 bool rob_empty = false; 1631 1632 if (instList.empty()) { 1633 return; 1634 } else if (rob.isEmpty(/*tid*/)) { 1635 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n"); 1636 end_it = instList.begin(); 1637 rob_empty = true; 1638 } else { 1639 end_it = (rob.readTailInst(tid))->getInstListIt(); 1640 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n"); 1641 } 1642 1643 removeInstsThisCycle = true; 1644 1645 ListIt inst_it = instList.end(); 1646 1647 inst_it--; 1648 1649 // Walk through the instruction list, removing any instructions 1650 // that were inserted after the given instruction iterator, end_it. 1651 while (inst_it != end_it) { 1652 assert(!instList.empty()); 1653 1654 squashInstIt(inst_it, tid); 1655 1656 inst_it--; 1657 } 1658 1659 // If the ROB was empty, then we actually need to remove the first 1660 // instruction as well. 1661 if (rob_empty) { 1662 squashInstIt(inst_it, tid); 1663 } 1664} 1665 1666template <class Impl> 1667void 1668FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid) 1669{ 1670 assert(!instList.empty()); 1671 1672 removeInstsThisCycle = true; 1673 1674 ListIt inst_iter = instList.end(); 1675 1676 inst_iter--; 1677 1678 DPRINTF(O3CPU, "Deleting instructions from instruction " 1679 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n", 1680 tid, seq_num, (*inst_iter)->seqNum); 1681 1682 while ((*inst_iter)->seqNum > seq_num) { 1683 1684 bool break_loop = (inst_iter == instList.begin()); 1685 1686 squashInstIt(inst_iter, tid); 1687 1688 inst_iter--; 1689 1690 if (break_loop) 1691 break; 1692 } 1693} 1694 1695template <class Impl> 1696inline void 1697FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid) 1698{ 1699 if ((*instIt)->threadNumber == tid) { 1700 DPRINTF(O3CPU, "Squashing instruction, " 1701 "[tid:%i] [sn:%lli] PC %s\n", 1702 (*instIt)->threadNumber, 1703 (*instIt)->seqNum, 1704 (*instIt)->pcState()); 1705 1706 // Mark it as squashed. 1707 (*instIt)->setSquashed(); 1708 1709 // @todo: Formulate a consistent method for deleting 1710 // instructions from the instruction list 1711 // Remove the instruction from the list. 1712 removeList.push(instIt); 1713 } 1714} 1715 1716template <class Impl> 1717void 1718FullO3CPU<Impl>::cleanUpRemovedInsts() 1719{ 1720 while (!removeList.empty()) { 1721 DPRINTF(O3CPU, "Removing instruction, " 1722 "[tid:%i] [sn:%lli] PC %s\n", 1723 (*removeList.front())->threadNumber, 1724 (*removeList.front())->seqNum, 1725 (*removeList.front())->pcState()); 1726 1727 instList.erase(removeList.front()); 1728 1729 removeList.pop(); 1730 } 1731 1732 removeInstsThisCycle = false; 1733} 1734/* 1735template <class Impl> 1736void 1737FullO3CPU<Impl>::removeAllInsts() 1738{ 1739 instList.clear(); 1740} 1741*/ 1742template <class Impl> 1743void 1744FullO3CPU<Impl>::dumpInsts() 1745{ 1746 int num = 0; 1747 1748 ListIt inst_list_it = instList.begin(); 1749 1750 cprintf("Dumping Instruction List\n"); 1751 1752 while (inst_list_it != instList.end()) { 1753 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n" 1754 "Squashed:%i\n\n", 1755 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber, 1756 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(), 1757 (*inst_list_it)->isSquashed()); 1758 inst_list_it++; 1759 ++num; 1760 } 1761} 1762/* 1763template <class Impl> 1764void 1765FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst) 1766{ 1767 iew.wakeDependents(inst); 1768} 1769*/ 1770template <class Impl> 1771void 1772FullO3CPU<Impl>::wakeCPU() 1773{ 1774 if (activityRec.active() || tickEvent.scheduled()) { 1775 DPRINTF(Activity, "CPU already running.\n"); 1776 return; 1777 } 1778 1779 DPRINTF(Activity, "Waking up CPU\n"); 1780 1781 Cycles cycles(curCycle() - lastRunningCycle); 1782 // @todo: This is an oddity that is only here to match the stats 1783 if (cycles != 0) 1784 --cycles; 1785 idleCycles += cycles; 1786 numCycles += cycles; 1787 1788 schedule(tickEvent, clockEdge()); 1789} 1790 1791template <class Impl> 1792void 1793FullO3CPU<Impl>::wakeup() 1794{ 1795 if (this->thread[0]->status() != ThreadContext::Suspended) 1796 return; 1797 1798 this->wakeCPU(); 1799 1800 DPRINTF(Quiesce, "Suspended Processor woken\n"); 1801 this->threadContexts[0]->activate(); 1802} 1803 1804template <class Impl> 1805ThreadID 1806FullO3CPU<Impl>::getFreeTid() 1807{ 1808 for (ThreadID tid = 0; tid < numThreads; tid++) { 1809 if (!tids[tid]) { 1810 tids[tid] = true; 1811 return tid; 1812 } 1813 } 1814 1815 return InvalidThreadID; 1816} 1817 1818template <class Impl> 1819void 1820FullO3CPU<Impl>::doContextSwitch() 1821{ 1822 if (contextSwitch) { 1823 1824 //ADD CODE TO DEACTIVE THREAD HERE (???) 1825 1826 ThreadID size = cpuWaitList.size(); 1827 for (ThreadID tid = 0; tid < size; tid++) { 1828 activateWhenReady(tid); 1829 } 1830 1831 if (cpuWaitList.size() == 0) 1832 contextSwitch = true; 1833 } 1834} 1835 1836template <class Impl> 1837void 1838FullO3CPU<Impl>::updateThreadPriority() 1839{ 1840 if (activeThreads.size() > 1) { 1841 //DEFAULT TO ROUND ROBIN SCHEME 1842 //e.g. Move highest priority to end of thread list 1843 list<ThreadID>::iterator list_begin = activeThreads.begin(); 1844 1845 unsigned high_thread = *list_begin; 1846 1847 activeThreads.erase(list_begin); 1848 1849 activeThreads.push_back(high_thread); 1850 } 1851} 1852 1853// Forward declaration of FullO3CPU. 1854template class FullO3CPU<O3CPUImpl>; 1855