summaryrefslogtreecommitdiff
path: root/src/cpu/ozone/cpu_impl.hh
blob: a22ada5d0523e72d5506b95dd50c25274b2deb02 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
/*
 * Copyright (c) 2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Kevin Lim
 *          Nathan Binkert
 */

#include "config/full_system.hh"
#include "config/use_checker.hh"

#include "arch/isa_traits.hh" // For MachInst
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/base.hh"
#include "cpu/simple_thread.hh"
#include "cpu/thread_context.hh"
#include "cpu/exetrace.hh"
#include "cpu/ozone/cpu.hh"
#include "cpu/quiesce_event.hh"
#include "cpu/static_inst.hh"
#include "sim/sim_object.hh"
#include "sim/stats.hh"

#if FULL_SYSTEM
#include "arch/faults.hh"
#include "arch/alpha/osfpal.hh"
#include "arch/tlb.hh"
#include "arch/types.hh"
#include "arch/kernel_stats.hh"
#include "arch/vtophys.hh"
#include "base/callback.hh"
#include "cpu/profile.hh"
#include "sim/faults.hh"
#include "sim/sim_events.hh"
#include "sim/sim_exit.hh"
#include "sim/system.hh"
#else // !FULL_SYSTEM
#include "sim/process.hh"
#endif // FULL_SYSTEM

#if USE_CHECKER
#include "cpu/checker/thread_context.hh"
#endif

using namespace TheISA;

template <class Impl>
OzoneCPU<Impl>::TickEvent::TickEvent(OzoneCPU *c, int w)
    : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c), width(w)
{
}

template <class Impl>
void
OzoneCPU<Impl>::TickEvent::process()
{
    cpu->tick();
}

template <class Impl>
const char *
OzoneCPU<Impl>::TickEvent::description() const
{
    return "OzoneCPU tick";
}

template <class Impl>
OzoneCPU<Impl>::OzoneCPU(Params *p)
#if FULL_SYSTEM
    : BaseCPU(p), thread(this, 0), tickEvent(this, p->width),
#else
    : BaseCPU(p), thread(this, 0, p->workload[0], 0),
      tickEvent(this, p->width),
#endif
#ifndef NDEBUG
      instcount(0),
#endif
      comm(5, 5)
{
    frontEnd = new FrontEnd(p);
    backEnd = new BackEnd(p);

    _status = Idle;

    if (p->checker) {
#if USE_CHECKER
        BaseCPU *temp_checker = p->checker;
        checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker);
#if FULL_SYSTEM
        checker->setSystem(p->system);
#endif
        checkerTC = new CheckerThreadContext<OzoneTC>(&ozoneTC, checker);
        thread.tc = checkerTC;
        tc = checkerTC;
#else
        panic("Checker enabled but not compiled in!");
#endif
    } else {
        // If checker is not being used, then the xcProxy points
        // directly to the CPU's ExecContext.
        checker = NULL;
        thread.tc = &ozoneTC;
        tc = &ozoneTC;
    }

    ozoneTC.cpu = this;
    ozoneTC.thread = &thread;

    thread.inSyscall = false;

    itb = p->itb;
    dtb = p->dtb;
#if FULL_SYSTEM
    // Setup thread state stuff.
    thread.cpu = this;
    thread.setTid(0);

    thread.quiesceEvent = new EndQuiesceEvent(tc);

    system = p->system;
    physmem = p->system->physmem;

    if (p->profile) {
        thread.profile = new FunctionProfile(p->system->kernelSymtab);
        // @todo: This might be better as an ThreadContext instead of OzoneTC
        Callback *cb =
            new MakeCallback<OzoneTC,
            &OzoneTC::dumpFuncProfile>(&ozoneTC);
        registerExitCallback(cb);
    }

    // let's fill with a dummy node for now so we don't get a segfault
    // on the first cycle when there's no node available.
    static ProfileNode dummyNode;
    thread.profileNode = &dummyNode;
    thread.profilePC = 3;
#else
    thread.cpu = this;
#endif // !FULL_SYSTEM

    numInst = 0;
    startNumInst = 0;

    threadContexts.push_back(tc);

    frontEnd->setCPU(this);
    backEnd->setCPU(this);

    frontEnd->setTC(tc);
    backEnd->setTC(tc);

    frontEnd->setThreadState(&thread);
    backEnd->setThreadState(&thread);

    frontEnd->setCommBuffer(&comm);
    backEnd->setCommBuffer(&comm);

    frontEnd->setBackEnd(backEnd);
    backEnd->setFrontEnd(frontEnd);

    globalSeqNum = 1;

    lockFlag = 0;

    // Setup rename table, initializing all values to ready.
    for (int i = 0; i < TheISA::TotalNumRegs; ++i) {
        thread.renameTable[i] = new DynInst(this);
        thread.renameTable[i]->setResultReady();
    }

    frontEnd->renameTable.copyFrom(thread.renameTable);
    backEnd->renameTable.copyFrom(thread.renameTable);

#if FULL_SYSTEM
    Port *mem_port;
    FunctionalPort *phys_port;
    VirtualPort *virt_port;
    phys_port = new FunctionalPort(csprintf("%s-%d-funcport",
                                            name(), 0));
    mem_port = system->physmem->getPort("functional");
    mem_port->setPeer(phys_port);
    phys_port->setPeer(mem_port);

    virt_port = new VirtualPort(csprintf("%s-%d-vport",
                                         name(), 0));
    mem_port = system->physmem->getPort("functional");
    mem_port->setPeer(virt_port);
    virt_port->setPeer(mem_port);

    thread.setPhysPort(phys_port);
    thread.setVirtPort(virt_port);
#endif

    DPRINTF(OzoneCPU, "OzoneCPU: Created Ozone cpu object.\n");
}

template <class Impl>
OzoneCPU<Impl>::~OzoneCPU()
{
}

template <class Impl>
void
OzoneCPU<Impl>::switchOut()
{
    BaseCPU::switchOut();
    switchCount = 0;
    // Front end needs state from back end, so switch out the back end first.
    backEnd->switchOut();
    frontEnd->switchOut();
}

template <class Impl>
void
OzoneCPU<Impl>::signalSwitched()
{
    // Only complete the switchout when both the front end and back
    // end have signalled they are ready to switch.
    if (++switchCount == 2) {
        backEnd->doSwitchOut();
        frontEnd->doSwitchOut();
#if USE_CHECKER
        if (checker)
            checker->switchOut();
#endif

        _status = SwitchedOut;
#ifndef NDEBUG
        // Loop through all registers
        for (int i = 0; i < AlphaISA::TotalNumRegs; ++i) {
            assert(thread.renameTable[i] == frontEnd->renameTable[i]);

            assert(thread.renameTable[i] == backEnd->renameTable[i]);

            DPRINTF(OzoneCPU, "Checking if register %i matches.\n", i);
        }
#endif

        if (tickEvent.scheduled())
            tickEvent.squash();
    }
    assert(switchCount <= 2);
}

template <class Impl>
void
OzoneCPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
{
    BaseCPU::takeOverFrom(oldCPU);

    thread.trapPending = false;
    thread.inSyscall = false;

    backEnd->takeOverFrom();
    frontEnd->takeOverFrom();
    frontEnd->renameTable.copyFrom(thread.renameTable);
    backEnd->renameTable.copyFrom(thread.renameTable);
    assert(!tickEvent.scheduled());

#ifndef NDEBUG
    // Check rename table.
    for (int i = 0; i < TheISA::TotalNumRegs; ++i) {
        assert(thread.renameTable[i]->isResultReady());
    }
#endif

    // @todo: Fix hardcoded number
    // Clear out any old information in time buffer.
    for (int i = 0; i < 15; ++i) {
        comm.advance();
    }

    // if any of this CPU's ThreadContexts are active, mark the CPU as
    // running and schedule its tick event.
    for (int i = 0; i < threadContexts.size(); ++i) {
        ThreadContext *tc = threadContexts[i];
        if (tc->status() == ThreadContext::Active &&
            _status != Running) {
            _status = Running;
            tickEvent.schedule(curTick);
        }
    }
    // Nothing running, change status to reflect that we're no longer
    // switched out.
    if (_status == SwitchedOut) {
        _status = Idle;
    }
}

template <class Impl>
void
OzoneCPU<Impl>::activateContext(int thread_num, int delay)
{
    // Eventually change this in SMT.
    assert(thread_num == 0);

    assert(_status == Idle);
    notIdleFraction++;
    scheduleTickEvent(delay);
    _status = Running;
#if FULL_SYSTEM
    if (thread.quiesceEvent && thread.quiesceEvent->scheduled())
        thread.quiesceEvent->deschedule();
#endif
    thread.setStatus(ThreadContext::Active);
    frontEnd->wakeFromQuiesce();
}

template <class Impl>
void
OzoneCPU<Impl>::suspendContext(int thread_num)
{
    // Eventually change this in SMT.
    assert(thread_num == 0);
    // @todo: Figure out how to initially set the status properly so
    // this is running.
//    assert(_status == Running);
    notIdleFraction--;
    unscheduleTickEvent();
    _status = Idle;
}

template <class Impl>
void
OzoneCPU<Impl>::deallocateContext(int thread_num, int delay)
{
    // for now, these are equivalent
    suspendContext(thread_num);
}

template <class Impl>
void
OzoneCPU<Impl>::haltContext(int thread_num)
{
    // for now, these are equivalent
    suspendContext(thread_num);
}

template <class Impl>
void
OzoneCPU<Impl>::regStats()
{
    using namespace Stats;

    BaseCPU::regStats();

    thread.numInsts
        .name(name() + ".num_insts")
        .desc("Number of instructions executed")
        ;

    thread.numMemRefs
        .name(name() + ".num_refs")
        .desc("Number of memory references")
        ;

    notIdleFraction
        .name(name() + ".not_idle_fraction")
        .desc("Percentage of non-idle cycles")
        ;

    idleFraction
        .name(name() + ".idle_fraction")
        .desc("Percentage of idle cycles")
        ;

    quiesceCycles
        .name(name() + ".quiesce_cycles")
        .desc("Number of cycles spent in quiesce")
        ;

    idleFraction = constant(1.0) - notIdleFraction;

    frontEnd->regStats();
    backEnd->regStats();
}

template <class Impl>
void
OzoneCPU<Impl>::resetStats()
{
//    startNumInst = numInst;
    notIdleFraction = (_status != Idle);
}

template <class Impl>
void
OzoneCPU<Impl>::init()
{
    BaseCPU::init();

    // Mark this as in syscall so it won't need to squash
    thread.inSyscall = true;
#if FULL_SYSTEM
    for (int i = 0; i < threadContexts.size(); ++i) {
        ThreadContext *tc = threadContexts[i];

        // initialize CPU, including PC
        TheISA::initCPU(tc, tc->contextId());
    }
#endif
    frontEnd->renameTable.copyFrom(thread.renameTable);
    backEnd->renameTable.copyFrom(thread.renameTable);

    thread.inSyscall = false;
}

template <class Impl>
Port *
OzoneCPU<Impl>::getPort(const std::string &if_name, int idx)
{
    if (if_name == "dcache_port")
        return backEnd->getDcachePort();
    else if (if_name == "icache_port")
        return frontEnd->getIcachePort();
    else
        panic("No Such Port\n");
}

template <class Impl>
void
OzoneCPU<Impl>::serialize(std::ostream &os)
{
    BaseCPU::serialize(os);
    SERIALIZE_ENUM(_status);
    nameOut(os, csprintf("%s.tc", name()));
    ozoneTC.serialize(os);
    nameOut(os, csprintf("%s.tickEvent", name()));
    tickEvent.serialize(os);

    // Use SimpleThread's ability to checkpoint to make it easier to
    // write out the registers.  Also make this static so it doesn't
    // get instantiated multiple times (causes a panic in statistics).
    static SimpleThread temp;

    nameOut(os, csprintf("%s.xc.0", name()));
    temp.copyTC(thread.getTC());
    temp.serialize(os);
}

template <class Impl>
void
OzoneCPU<Impl>::unserialize(Checkpoint *cp, const std::string &section)
{
    BaseCPU::unserialize(cp, section);
    UNSERIALIZE_ENUM(_status);
    ozoneTC.unserialize(cp, csprintf("%s.tc", section));
    tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));

    // Use SimpleThread's ability to checkpoint to make it easier to
    // read in the registers.  Also make this static so it doesn't
    // get instantiated multiple times (causes a panic in statistics).
    static SimpleThread temp;

    temp.copyTC(thread.getTC());
    temp.unserialize(cp, csprintf("%s.xc.0", section));
    thread.getTC()->copyArchRegs(temp.getTC());
}

#if FULL_SYSTEM
template <class Impl>
Addr
OzoneCPU<Impl>::dbg_vtophys(Addr addr)
{
    return vtophys(tc, addr);
}
#endif // FULL_SYSTEM

#if FULL_SYSTEM
template <class Impl>
void
OzoneCPU<Impl>::wakeup()
{
    if (_status == Idle) {
        DPRINTF(IPI,"Suspended Processor awoke\n");
//      thread.activate();
        // Hack for now.  Otherwise might have to go through the tc, or
        // I need to figure out what's the right thing to call.
        activateContext(thread.threadId(), 1);
    }
}
#endif // FULL_SYSTEM

/* start simulation, program loaded, processor precise state initialized */
template <class Impl>
void
OzoneCPU<Impl>::tick()
{
    DPRINTF(OzoneCPU, "\n\nOzoneCPU: Ticking cpu.\n");

    _status = Running;
    thread.renameTable[ZeroReg]->setIntResult(0);
    thread.renameTable[ZeroReg+TheISA::FP_Base_DepTag]->
        setDoubleResult(0.0);

    comm.advance();
    frontEnd->tick();
    backEnd->tick();

    // check for instruction-count-based events
    comInstEventQueue[0]->serviceEvents(numInst);

    if (!tickEvent.scheduled() && _status == Running)
        tickEvent.schedule(curTick + ticks(1));
}

template <class Impl>
void
OzoneCPU<Impl>::squashFromTC()
{
    thread.inSyscall = true;
    backEnd->generateTCEvent();
}

#if !FULL_SYSTEM
template <class Impl>
void
OzoneCPU<Impl>::syscall(uint64_t &callnum)
{
    // Not sure this copy is needed, depending on how the TC proxy is made.
    thread.renameTable.copyFrom(backEnd->renameTable);

    thread.inSyscall = true;

    thread.funcExeInst++;

    DPRINTF(OzoneCPU, "FuncExeInst: %i\n", thread.funcExeInst);

    thread.process->syscall(callnum, tc);

    thread.funcExeInst--;

    thread.inSyscall = false;

    frontEnd->renameTable.copyFrom(thread.renameTable);
    backEnd->renameTable.copyFrom(thread.renameTable);
}
#else
template <class Impl>
Fault
OzoneCPU<Impl>::hwrei()
{
    // Need to move this to ISA code
    // May also need to make this per thread

    lockFlag = false;
    lockAddrList.clear();
    thread.kernelStats->hwrei();

    // FIXME: XXX check for interrupts? XXX
    return NoFault;
}

template <class Impl>
void
OzoneCPU<Impl>::processInterrupts()
{
    // Check for interrupts here.  For now can copy the code that
    // exists within isa_fullsys_traits.hh.  Also assume that thread 0
    // is the one that handles the interrupts.

    // Check if there are any outstanding interrupts
    //Handle the interrupts
    Fault interrupt = this->interrupts->getInterrupt(thread.getTC());

    if (interrupt != NoFault) {
        this->interrupts->updateIntrInfo(thread.getTC());
        interrupt->invoke(thread.getTC());
    }
}

template <class Impl>
bool
OzoneCPU<Impl>::simPalCheck(int palFunc)
{
    // Need to move this to ISA code
    // May also need to make this per thread
    thread.kernelStats->callpal(palFunc, tc);

    switch (palFunc) {
      case PAL::halt:
        haltContext(thread.threadId());
        if (--System::numSystemsRunning == 0)
            exitSimLoop("all cpus halted");
        break;

      case PAL::bpt:
      case PAL::bugchk:
        if (system->breakpoint())
            return false;
        break;
    }

    return true;
}
#endif

template <class Impl>
BaseCPU *
OzoneCPU<Impl>::OzoneTC::getCpuPtr()
{
    return cpu;
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setStatus(Status new_status)
{
    thread->setStatus(new_status);
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::activate(int delay)
{
    cpu->activateContext(thread->threadId(), delay);
}

/// Set the status to Suspended.
template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::suspend()
{
    cpu->suspendContext(thread->threadId());
}

/// Set the status to Halted.
template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::halt()
{
    cpu->haltContext(thread->threadId());
}

#if FULL_SYSTEM
template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::dumpFuncProfile()
{
    thread->dumpFuncProfile();
}
#endif

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::takeOverFrom(ThreadContext *old_context)
{
    // some things should already be set up
#if FULL_SYSTEM
    assert(getSystemPtr() == old_context->getSystemPtr());
#else
    assert(getProcessPtr() == old_context->getProcessPtr());
#endif

    // copy over functional state
    setStatus(old_context->status());
    copyArchRegs(old_context);
    setCpuId(old_context->cpuId());
    setContextId(old_context->contextId());

#if !FULL_SYSTEM
    setFuncExeInst(old_context->readFuncExeInst());
#else
    EndQuiesceEvent *other_quiesce = old_context->getQuiesceEvent();
    if (other_quiesce) {
        // Point the quiesce event's TC at this TC so that it wakes up
        // the proper CPU.
        other_quiesce->tc = this;
    }
    if (thread->quiesceEvent) {
        thread->quiesceEvent->tc = this;
    }

    // Copy kernel stats pointer from old context.
    thread->kernelStats = old_context->getKernelStats();
//    storeCondFailures = 0;
    cpu->lockFlag = false;
#endif

    old_context->setStatus(ThreadContext::Halted);
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::regStats(const std::string &name)
{
#if FULL_SYSTEM
    thread->kernelStats = new TheISA::Kernel::Statistics(cpu->system);
    thread->kernelStats->regStats(name + ".kern");
#endif
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::serialize(std::ostream &os)
{
    // Once serialization is added, serialize the quiesce event and
    // kernel stats.  Will need to make sure there aren't multiple
    // things that serialize them.
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::unserialize(Checkpoint *cp, const std::string &section)
{ }

#if FULL_SYSTEM
template <class Impl>
EndQuiesceEvent *
OzoneCPU<Impl>::OzoneTC::getQuiesceEvent()
{
    return thread->quiesceEvent;
}

template <class Impl>
Tick
OzoneCPU<Impl>::OzoneTC::readLastActivate()
{
    return thread->lastActivate;
}

template <class Impl>
Tick
OzoneCPU<Impl>::OzoneTC::readLastSuspend()
{
    return thread->lastSuspend;
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::profileClear()
{
    thread->profileClear();
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::profileSample()
{
    thread->profileSample();
}
#endif

template <class Impl>
int
OzoneCPU<Impl>::OzoneTC::threadId()
{
    return thread->threadId();
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::copyArchRegs(ThreadContext *tc)
{
    thread->PC = tc->readPC();
    thread->nextPC = tc->readNextPC();

    cpu->frontEnd->setPC(thread->PC);
    cpu->frontEnd->setNextPC(thread->nextPC);

    // First loop through the integer registers.
    for (int i = 0; i < TheISA::NumIntRegs; ++i) {
/*        DPRINTF(OzoneCPU, "Copying over register %i, had data %lli, "
                "now has data %lli.\n",
                i, thread->renameTable[i]->readIntResult(),
                tc->readIntReg(i));
*/
        thread->renameTable[i]->setIntResult(tc->readIntReg(i));
    }

    // Then loop through the floating point registers.
    for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
        int fp_idx = i + TheISA::FP_Base_DepTag;
        thread->renameTable[fp_idx]->setIntResult(tc->readFloatRegBits(i));
    }

#if !FULL_SYSTEM
    thread->funcExeInst = tc->readFuncExeInst();
#endif

    // Need to copy the TC values into the current rename table,
    // copy the misc regs.
    copyMiscRegs(tc, this);
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::clearArchRegs()
{
    panic("Unimplemented!");
}

template <class Impl>
uint64_t
OzoneCPU<Impl>::OzoneTC::readIntReg(int reg_idx)
{
    return thread->renameTable[reg_idx]->readIntResult();
}

template <class Impl>
double
OzoneCPU<Impl>::OzoneTC::readFloatReg(int reg_idx)
{
    int idx = reg_idx + TheISA::FP_Base_DepTag;
    return thread->renameTable[idx]->readFloatResult();
}

template <class Impl>
uint64_t
OzoneCPU<Impl>::OzoneTC::readFloatRegBits(int reg_idx)
{
    int idx = reg_idx + TheISA::FP_Base_DepTag;
    return thread->renameTable[idx]->readIntResult();
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setIntReg(int reg_idx, uint64_t val)
{
    thread->renameTable[reg_idx]->setIntResult(val);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setFloatReg(int reg_idx, FloatReg val)
{
    int idx = reg_idx + TheISA::FP_Base_DepTag;

    thread->renameTable[idx]->setDoubleResult(val);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setFloatRegBits(int reg_idx, FloatRegBits val)
{
    panic("Unimplemented!");
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setPC(Addr val)
{
    thread->PC = val;
    cpu->frontEnd->setPC(val);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setNextPC(Addr val)
{
    thread->nextPC = val;
    cpu->frontEnd->setNextPC(val);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}

template <class Impl>
TheISA::MiscReg
OzoneCPU<Impl>::OzoneTC::readMiscRegNoEffect(int misc_reg)
{
    return thread->miscRegFile.readRegNoEffect(misc_reg);
}

template <class Impl>
TheISA::MiscReg
OzoneCPU<Impl>::OzoneTC::readMiscReg(int misc_reg)
{
    return thread->miscRegFile.readReg(misc_reg, this);
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
{
    // Needs to setup a squash event unless we're in syscall mode
    thread->miscRegFile.setRegNoEffect(misc_reg, val);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}

template <class Impl>
void
OzoneCPU<Impl>::OzoneTC::setMiscReg(int misc_reg, const MiscReg &val)
{
    // Needs to setup a squash event unless we're in syscall mode
    thread->miscRegFile.setReg(misc_reg, val, this);

    if (!thread->inSyscall) {
        cpu->squashFromTC();
    }
}