src/cpu/simple/timing.cc

   1 /*
   2  * Copyright (c) 2002-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Steve Reinhardt
  29  */
  30
  31 #include "arch/locked_mem.hh"
  32 #include "arch/utility.hh"
  33 #include "cpu/exetrace.hh"
  34 #include "cpu/simple/timing.hh"
  35 #include "mem/packet.hh"
  36 #include "mem/packet_access.hh"
  37 #include "sim/builder.hh"
  38 #include "sim/system.hh"
  39
  40 using namespace std;
  41 using namespace TheISA;
  42
  43 Port *
  44 TimingSimpleCPU::getPort(const std::string &if_name, int idx)
  45 {
  46     if (if_name == "dcache_port")
  47         return &dcachePort;
  48     else if (if_name == "icache_port")
  49         return &icachePort;
  50     else
  51         panic("No Such Port\n");
  52 }
  53
  54 void
  55 TimingSimpleCPU::init()
  56 {
  57     BaseCPU::init();
  58 #if FULL_SYSTEM
  59     for (int i = 0; i < threadContexts.size(); ++i) {
  60         ThreadContext *tc = threadContexts[i];
  61
  62         // initialize CPU, including PC
  63         TheISA::initCPU(tc, tc->readCpuId());
  64     }
  65 #endif
  66 }
  67
  68 Tick
  69 TimingSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt)
  70 {
  71     panic("TimingSimpleCPU doesn't expect recvAtomic callback!");
  72     return curTick;
  73 }
  74
  75 void
  76 TimingSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt)
  77 {
  78     //No internal storage to update, jusst return
  79     return;
  80 }
  81
  82 void
  83 TimingSimpleCPU::CpuPort::recvStatusChange(Status status)
  84 {
  85     if (status == RangeChange)
  86         return;
  87
  88     panic("TimingSimpleCPU doesn't expect recvStatusChange callback!");
  89 }
  90
  91
  92 void
  93 TimingSimpleCPU::CpuPort::TickEvent::schedule(PacketPtr _pkt, Tick t)
  94 {
  95     pkt = _pkt;
  96     Event::schedule(t);
  97 }
  98
  99 TimingSimpleCPU::TimingSimpleCPU(Params *p)
 100     : BaseSimpleCPU(p), icachePort(this, p->clock), dcachePort(this, p->clock),
 101       cpu_id(p->cpu_id)
 102 {
 103     _status = Idle;
 104     ifetch_pkt = dcache_pkt = NULL;
 105     drainEvent = NULL;
 106     fetchEvent = NULL;
 107     previousTick = 0;
 108     changeState(SimObject::Running);
 109 }
 110
 111
 112 TimingSimpleCPU::~TimingSimpleCPU()
 113 {
 114 }
 115
 116 void
 117 TimingSimpleCPU::serialize(ostream &os)
 118 {
 119     SimObject::State so_state = SimObject::getState();
 120     SERIALIZE_ENUM(so_state);
 121     BaseSimpleCPU::serialize(os);
 122 }
 123
 124 void
 125 TimingSimpleCPU::unserialize(Checkpoint *cp, const string &section)
 126 {
 127     SimObject::State so_state;
 128     UNSERIALIZE_ENUM(so_state);
 129     BaseSimpleCPU::unserialize(cp, section);
 130 }
 131
 132 unsigned int
 133 TimingSimpleCPU::drain(Event *drain_event)
 134 {
 135     // TimingSimpleCPU is ready to drain if it's not waiting for
 136     // an access to complete.
 137     if (status() == Idle || status() == Running || status() == SwitchedOut) {
 138         changeState(SimObject::Drained);
 139         return 0;
 140     } else {
 141         changeState(SimObject::Draining);
 142         drainEvent = drain_event;
 143         return 1;
 144     }
 145 }
 146
 147 void
 148 TimingSimpleCPU::resume()
 149 {
 150     if (_status != SwitchedOut && _status != Idle) {
 151         assert(system->getMemoryMode() == System::Timing);
 152
 153         // Delete the old event if it existed.
 154         if (fetchEvent) {
 155             if (fetchEvent->scheduled())
 156                 fetchEvent->deschedule();
 157
 158             delete fetchEvent;
 159         }
 160
 161         fetchEvent =
 162             new EventWrapper<TimingSimpleCPU, &TimingSimpleCPU::fetch>(this, false);
 163         fetchEvent->schedule(curTick);
 164     }
 165
 166     changeState(SimObject::Running);
 167     previousTick = curTick;
 168 }
 169
 170 void
 171 TimingSimpleCPU::switchOut()
 172 {
 173     assert(status() == Running || status() == Idle);
 174     _status = SwitchedOut;
 175     numCycles += curTick - previousTick;
 176
 177     // If we've been scheduled to resume but are then told to switch out,
 178     // we'll need to cancel it.
 179     if (fetchEvent && fetchEvent->scheduled())
 180         fetchEvent->deschedule();
 181 }
 182
 183
 184 void
 185 TimingSimpleCPU::takeOverFrom(BaseCPU *oldCPU)
 186 {
 187     BaseCPU::takeOverFrom(oldCPU);
 188
 189     // if any of this CPU's ThreadContexts are active, mark the CPU as
 190     // running and schedule its tick event.
 191     for (int i = 0; i < threadContexts.size(); ++i) {
 192         ThreadContext *tc = threadContexts[i];
 193         if (tc->status() == ThreadContext::Active && _status != Running) {
 194             _status = Running;
 195             break;
 196         }
 197     }
 198
 199     if (_status != Running) {
 200         _status = Idle;
 201     }
 202
 203     Port *peer;
 204     if (icachePort.getPeer() == NULL) {
 205         peer = oldCPU->getPort("icache_port")->getPeer();
 206         icachePort.setPeer(peer);
 207     } else {
 208         peer = icachePort.getPeer();
 209     }
 210     peer->setPeer(&icachePort);
 211
 212     if (dcachePort.getPeer() == NULL) {
 213         peer = oldCPU->getPort("dcache_port")->getPeer();
 214         dcachePort.setPeer(peer);
 215     } else {
 216         peer = dcachePort.getPeer();
 217     }
 218     peer->setPeer(&dcachePort);
 219 }
 220
 221
 222 void
 223 TimingSimpleCPU::activateContext(int thread_num, int delay)
 224 {
 225     assert(thread_num == 0);
 226     assert(thread);
 227
 228     assert(_status == Idle);
 229
 230     notIdleFraction++;
 231     _status = Running;
 232     // kick things off by initiating the fetch of the next instruction
 233     fetchEvent =
 234         new EventWrapper<TimingSimpleCPU, &TimingSimpleCPU::fetch>(this, false);
 235     fetchEvent->schedule(curTick + cycles(delay));
 236 }
 237
 238
 239 void
 240 TimingSimpleCPU::suspendContext(int thread_num)
 241 {
 242     assert(thread_num == 0);
 243     assert(thread);
 244
 245     assert(_status == Running);
 246
 247     // just change status to Idle... if status != Running,
 248     // completeInst() will not initiate fetch of next instruction.
 249
 250     notIdleFraction--;
 251     _status = Idle;
 252 }
 253
 254
 255 template <class T>
 256 Fault
 257 TimingSimpleCPU::read(Addr addr, T &data, unsigned flags)
 258 {
 259     Request *req =
 260         new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
 261                     cpu_id, /* thread ID */ 0);
 262
 263     if (traceData) {
 264         traceData->setAddr(req->getVaddr());
 265     }
 266
 267    // translate to physical address
 268     Fault fault = thread->translateDataReadReq(req);
 269
 270     // Now do the access.
 271     if (fault == NoFault) {
 272         PacketPtr pkt =
 273             new Packet(req, Packet::ReadReq, Packet::Broadcast);
 274         pkt->dataDynamic<T>(new T);
 275
 276         if (!dcachePort.sendTiming(pkt)) {
 277             _status = DcacheRetry;
 278             dcache_pkt = pkt;
 279         } else {
 280             _status = DcacheWaitResponse;
 281             // memory system takes ownership of packet
 282             dcache_pkt = NULL;
 283         }
 284     }
 285
 286     // This will need a new way to tell if it has a dcache attached.
 287     if (req->isUncacheable())
 288         recordEvent("Uncached Read");
 289
 290     return fault;
 291 }
 292
 293 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 294
 295 template
 296 Fault
 297 TimingSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
 298
 299 template
 300 Fault
 301 TimingSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags);
 302
 303 template
 304 Fault
 305 TimingSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags);
 306
 307 template
 308 Fault
 309 TimingSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags);
 310
 311 #endif //DOXYGEN_SHOULD_SKIP_THIS
 312
 313 template<>
 314 Fault
 315 TimingSimpleCPU::read(Addr addr, double &data, unsigned flags)
 316 {
 317     return read(addr, *(uint64_t*)&data, flags);
 318 }
 319
 320 template<>
 321 Fault
 322 TimingSimpleCPU::read(Addr addr, float &data, unsigned flags)
 323 {
 324     return read(addr, *(uint32_t*)&data, flags);
 325 }
 326
 327
 328 template<>
 329 Fault
 330 TimingSimpleCPU::read(Addr addr, int32_t &data, unsigned flags)
 331 {
 332     return read(addr, (uint32_t&)data, flags);
 333 }
 334
 335
 336 template <class T>
 337 Fault
 338 TimingSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
 339 {
 340     Request *req =
 341         new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
 342                     cpu_id, /* thread ID */ 0);
 343
 344     // translate to physical address
 345     Fault fault = thread->translateDataWriteReq(req);
 346
 347     // Now do the access.
 348     if (fault == NoFault) {
 349         assert(dcache_pkt == NULL);
 350         dcache_pkt = new Packet(req, Packet::WriteReq, Packet::Broadcast);
 351         dcache_pkt->allocate();
 352         dcache_pkt->set(data);
 353
 354         bool do_access = true;  // flag to suppress cache access
 355
 356         if (req->isLocked()) {
 357             do_access = TheISA::handleLockedWrite(thread, req);
 358         }
 359
 360         if (do_access) {
 361             if (!dcachePort.sendTiming(dcache_pkt)) {
 362                 _status = DcacheRetry;
 363             } else {
 364                 _status = DcacheWaitResponse;
 365                 // memory system takes ownership of packet
 366                 dcache_pkt = NULL;
 367             }
 368         }
 369     }
 370
 371     // This will need a new way to tell if it's hooked up to a cache or not.
 372     if (req->isUncacheable())
 373         recordEvent("Uncached Write");
 374
 375     // If the write needs to have a fault on the access, consider calling
 376     // changeStatus() and changing it to "bad addr write" or something.
 377     return fault;
 378 }
 379
 380
 381 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 382 template
 383 Fault
 384 TimingSimpleCPU::write(uint64_t data, Addr addr,
 385                        unsigned flags, uint64_t *res);
 386
 387 template
 388 Fault
 389 TimingSimpleCPU::write(uint32_t data, Addr addr,
 390                        unsigned flags, uint64_t *res);
 391
 392 template
 393 Fault
 394 TimingSimpleCPU::write(uint16_t data, Addr addr,
 395                        unsigned flags, uint64_t *res);
 396
 397 template
 398 Fault
 399 TimingSimpleCPU::write(uint8_t data, Addr addr,
 400                        unsigned flags, uint64_t *res);
 401
 402 #endif //DOXYGEN_SHOULD_SKIP_THIS
 403
 404 template<>
 405 Fault
 406 TimingSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res)
 407 {
 408     return write(*(uint64_t*)&data, addr, flags, res);
 409 }
 410
 411 template<>
 412 Fault
 413 TimingSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res)
 414 {
 415     return write(*(uint32_t*)&data, addr, flags, res);
 416 }
 417
 418
 419 template<>
 420 Fault
 421 TimingSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
 422 {
 423     return write((uint32_t)data, addr, flags, res);
 424 }
 425
 426
 427 void
 428 TimingSimpleCPU::fetch()
 429 {
 430     checkForInterrupts();
 431
 432     Request *ifetch_req = new Request();
 433     ifetch_req->setThreadContext(cpu_id, /* thread ID */ 0);
 434     Fault fault = setupFetchRequest(ifetch_req);
 435
 436     ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast);
 437     ifetch_pkt->dataStatic(&inst);
 438
 439     if (fault == NoFault) {
 440         if (!icachePort.sendTiming(ifetch_pkt)) {
 441             // Need to wait for retry
 442             _status = IcacheRetry;
 443         } else {
 444             // Need to wait for cache to respond
 445             _status = IcacheWaitResponse;
 446             // ownership of packet transferred to memory system
 447             ifetch_pkt = NULL;
 448         }
 449     } else {
 450         // fetch fault: advance directly to next instruction (fault handler)
 451         advanceInst(fault);
 452     }
 453
 454     numCycles += curTick - previousTick;
 455     previousTick = curTick;
 456 }
 457
 458
 459 void
 460 TimingSimpleCPU::advanceInst(Fault fault)
 461 {
 462     advancePC(fault);
 463
 464     if (_status == Running) {
 465         // kick off fetch of next instruction... callback from icache
 466         // response will cause that instruction to be executed,
 467         // keeping the CPU running.
 468         fetch();
 469     }
 470 }
 471
 472
 473 void
 474 TimingSimpleCPU::completeIfetch(PacketPtr pkt)
 475 {
 476     // received a response from the icache: execute the received
 477     // instruction
 478     assert(pkt->result == Packet::Success);
 479     assert(_status == IcacheWaitResponse);
 480
 481     _status = Running;
 482
 483     delete pkt->req;
 484     delete pkt;
 485
 486     numCycles += curTick - previousTick;
 487     previousTick = curTick;
 488
 489     if (getState() == SimObject::Draining) {
 490         completeDrain();
 491         return;
 492     }
 493
 494     preExecute();
 495     if (curStaticInst->isMemRef() && !curStaticInst->isDataPrefetch()) {
 496         // load or store: just send to dcache
 497         Fault fault = curStaticInst->initiateAcc(this, traceData);
 498         if (_status != Running) {
 499             // instruction will complete in dcache response callback
 500             assert(_status == DcacheWaitResponse || _status == DcacheRetry);
 501             assert(fault == NoFault);
 502         } else {
 503             if (fault == NoFault) {
 504                 // early fail on store conditional: complete now
 505                 assert(dcache_pkt != NULL);
 506                 fault = curStaticInst->completeAcc(dcache_pkt, this,
 507                                                    traceData);
 508                 delete dcache_pkt->req;
 509                 delete dcache_pkt;
 510                 dcache_pkt = NULL;
 511             }
 512             postExecute();
 513             advanceInst(fault);
 514         }
 515     } else {
 516         // non-memory instruction: execute completely now
 517         Fault fault = curStaticInst->execute(this, traceData);
 518         postExecute();
 519         advanceInst(fault);
 520     }
 521 }
 522
 523 void
 524 TimingSimpleCPU::IcachePort::ITickEvent::process()
 525 {
 526     cpu->completeIfetch(pkt);
 527 }
 528
 529 bool
 530 TimingSimpleCPU::IcachePort::recvTiming(PacketPtr pkt)
 531 {
 532     if (pkt->isResponse()) {
 533         // delay processing of returned data until next CPU clock edge
 534         Tick time = pkt->req->getTime();
 535         while (time < curTick)
 536             time += lat;
 537
 538         if (time == curTick)
 539             cpu->completeIfetch(pkt);
 540         else
 541             tickEvent.schedule(pkt, time);
 542
 543         return true;
 544     }
 545     else {
 546         //Snooping a Coherence Request, do nothing
 547         return true;
 548     }
 549 }
 550
 551 void
 552 TimingSimpleCPU::IcachePort::recvRetry()
 553 {
 554     // we shouldn't get a retry unless we have a packet that we're
 555     // waiting to transmit
 556     assert(cpu->ifetch_pkt != NULL);
 557     assert(cpu->_status == IcacheRetry);
 558     PacketPtr tmp = cpu->ifetch_pkt;
 559     if (sendTiming(tmp)) {
 560         cpu->_status = IcacheWaitResponse;
 561         cpu->ifetch_pkt = NULL;
 562     }
 563 }
 564
 565 void
 566 TimingSimpleCPU::completeDataAccess(PacketPtr pkt)
 567 {
 568     // received a response from the dcache: complete the load or store
 569     // instruction
 570     assert(pkt->result == Packet::Success);
 571     assert(_status == DcacheWaitResponse);
 572     _status = Running;
 573
 574     numCycles += curTick - previousTick;
 575     previousTick = curTick;
 576
 577     Fault fault = curStaticInst->completeAcc(pkt, this, traceData);
 578
 579     if (pkt->isRead() && pkt->req->isLocked()) {
 580         TheISA::handleLockedRead(thread, pkt->req);
 581     }
 582
 583     delete pkt->req;
 584     delete pkt;
 585
 586     postExecute();
 587
 588     if (getState() == SimObject::Draining) {
 589         advancePC(fault);
 590         completeDrain();
 591
 592         return;
 593     }
 594
 595     advanceInst(fault);
 596 }
 597
 598
 599 void
 600 TimingSimpleCPU::completeDrain()
 601 {
 602     DPRINTF(Config, "Done draining\n");
 603     changeState(SimObject::Drained);
 604     drainEvent->process();
 605 }
 606
 607 bool
 608 TimingSimpleCPU::DcachePort::recvTiming(PacketPtr pkt)
 609 {
 610     if (pkt->isResponse()) {
 611         // delay processing of returned data until next CPU clock edge
 612         Tick time = pkt->req->getTime();
 613         while (time < curTick)
 614             time += lat;
 615
 616         if (time == curTick)
 617             cpu->completeDataAccess(pkt);
 618         else
 619             tickEvent.schedule(pkt, time);
 620
 621         return true;
 622     }
 623     else {
 624         //Snooping a coherence req, do nothing
 625         return true;
 626     }
 627 }
 628
 629 void
 630 TimingSimpleCPU::DcachePort::DTickEvent::process()
 631 {
 632     cpu->completeDataAccess(pkt);
 633 }
 634
 635 void
 636 TimingSimpleCPU::DcachePort::recvRetry()
 637 {
 638     // we shouldn't get a retry unless we have a packet that we're
 639     // waiting to transmit
 640     assert(cpu->dcache_pkt != NULL);
 641     assert(cpu->_status == DcacheRetry);
 642     PacketPtr tmp = cpu->dcache_pkt;
 643     if (sendTiming(tmp)) {
 644         cpu->_status = DcacheWaitResponse;
 645         // memory system takes ownership of packet
 646         cpu->dcache_pkt = NULL;
 647     }
 648 }
 649
 650
 651 ////////////////////////////////////////////////////////////////////////
 652 //
 653 //  TimingSimpleCPU Simulation Object
 654 //
 655 BEGIN_DECLARE_SIM_OBJECT_PARAMS(TimingSimpleCPU)
 656
 657     Param<Counter> max_insts_any_thread;
 658     Param<Counter> max_insts_all_threads;
 659     Param<Counter> max_loads_any_thread;
 660     Param<Counter> max_loads_all_threads;
 661     Param<Tick> progress_interval;
 662     SimObjectParam<MemObject *> mem;
 663     SimObjectParam<System *> system;
 664     Param<int> cpu_id;
 665
 666 #if FULL_SYSTEM
 667     SimObjectParam<AlphaITB *> itb;
 668     SimObjectParam<AlphaDTB *> dtb;
 669     Param<Tick> profile;
 670 #else
 671     SimObjectParam<Process *> workload;
 672 #endif // FULL_SYSTEM
 673
 674     Param<int> clock;
 675
 676     Param<bool> defer_registration;
 677     Param<int> width;
 678     Param<bool> function_trace;
 679     Param<Tick> function_trace_start;
 680     Param<bool> simulate_stalls;
 681
 682 END_DECLARE_SIM_OBJECT_PARAMS(TimingSimpleCPU)
 683
 684 BEGIN_INIT_SIM_OBJECT_PARAMS(TimingSimpleCPU)
 685
 686     INIT_PARAM(max_insts_any_thread,
 687                "terminate when any thread reaches this inst count"),
 688     INIT_PARAM(max_insts_all_threads,
 689                "terminate when all threads have reached this inst count"),
 690     INIT_PARAM(max_loads_any_thread,
 691                "terminate when any thread reaches this load count"),
 692     INIT_PARAM(max_loads_all_threads,
 693                "terminate when all threads have reached this load count"),
 694     INIT_PARAM(progress_interval, "Progress interval"),
 695     INIT_PARAM(mem, "memory"),
 696     INIT_PARAM(system, "system object"),
 697     INIT_PARAM(cpu_id, "processor ID"),
 698
 699 #if FULL_SYSTEM
 700     INIT_PARAM(itb, "Instruction TLB"),
 701     INIT_PARAM(dtb, "Data TLB"),
 702     INIT_PARAM(profile, ""),
 703 #else
 704     INIT_PARAM(workload, "processes to run"),
 705 #endif // FULL_SYSTEM
 706
 707     INIT_PARAM(clock, "clock speed"),
 708     INIT_PARAM(defer_registration, "defer system registration (for sampling)"),
 709     INIT_PARAM(width, "cpu width"),
 710     INIT_PARAM(function_trace, "Enable function trace"),
 711     INIT_PARAM(function_trace_start, "Cycle to start function trace"),
 712     INIT_PARAM(simulate_stalls, "Simulate cache stall cycles")
 713
 714 END_INIT_SIM_OBJECT_PARAMS(TimingSimpleCPU)
 715
 716
 717 CREATE_SIM_OBJECT(TimingSimpleCPU)
 718 {
 719     TimingSimpleCPU::Params *params = new TimingSimpleCPU::Params();
 720     params->name = getInstanceName();
 721     params->numberOfThreads = 1;
 722     params->max_insts_any_thread = max_insts_any_thread;
 723     params->max_insts_all_threads = max_insts_all_threads;
 724     params->max_loads_any_thread = max_loads_any_thread;
 725     params->max_loads_all_threads = max_loads_all_threads;
 726     params->progress_interval = progress_interval;
 727     params->deferRegistration = defer_registration;
 728     params->clock = clock;
 729     params->functionTrace = function_trace;
 730     params->functionTraceStart = function_trace_start;
 731     params->mem = mem;
 732     params->system = system;
 733     params->cpu_id = cpu_id;
 734
 735 #if FULL_SYSTEM
 736     params->itb = itb;
 737     params->dtb = dtb;
 738     params->profile = profile;
 739 #else
 740     params->process = workload;
 741 #endif
 742
 743     TimingSimpleCPU *cpu = new TimingSimpleCPU(params);
 744     return cpu;
 745 }
 746
 747 REGISTER_SIM_OBJECT("TimingSimpleCPU", TimingSimpleCPU)
 748