2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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.
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.
28 * Authors: Steve Reinhardt
31 #include "arch/locked_mem.hh"
32 #include "arch/utility.hh"
33 #include "base/bigint.hh"
34 #include "cpu/exetrace.hh"
35 #include "cpu/simple/timing.hh"
36 #include "mem/packet.hh"
37 #include "mem/packet_access.hh"
38 #include "sim/builder.hh"
39 #include "sim/system.hh"
42 using namespace TheISA
;
45 TimingSimpleCPU::getPort(const std::string
&if_name
, int idx
)
47 if (if_name
== "dcache_port")
49 else if (if_name
== "icache_port")
52 panic("No Such Port\n");
56 TimingSimpleCPU::init()
60 for (int i
= 0; i
< threadContexts
.size(); ++i
) {
61 ThreadContext
*tc
= threadContexts
[i
];
63 // initialize CPU, including PC
64 TheISA::initCPU(tc
, tc
->readCpuId());
70 TimingSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt
)
72 panic("TimingSimpleCPU doesn't expect recvAtomic callback!");
77 TimingSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt
)
79 //No internal storage to update, jusst return
84 TimingSimpleCPU::CpuPort::recvStatusChange(Status status
)
86 if (status
== RangeChange
) {
87 if (!snoopRangeSent
) {
88 snoopRangeSent
= true;
89 sendStatusChange(Port::RangeChange
);
94 panic("TimingSimpleCPU doesn't expect recvStatusChange callback!");
99 TimingSimpleCPU::CpuPort::TickEvent::schedule(PacketPtr _pkt
, Tick t
)
105 TimingSimpleCPU::TimingSimpleCPU(Params
*p
)
106 : BaseSimpleCPU(p
), icachePort(this, p
->clock
), dcachePort(this, p
->clock
),
111 icachePort
.snoopRangeSent
= false;
112 dcachePort
.snoopRangeSent
= false;
114 ifetch_pkt
= dcache_pkt
= NULL
;
118 changeState(SimObject::Running
);
122 TimingSimpleCPU::~TimingSimpleCPU()
127 TimingSimpleCPU::serialize(ostream
&os
)
129 SimObject::State so_state
= SimObject::getState();
130 SERIALIZE_ENUM(so_state
);
131 BaseSimpleCPU::serialize(os
);
135 TimingSimpleCPU::unserialize(Checkpoint
*cp
, const string
§ion
)
137 SimObject::State so_state
;
138 UNSERIALIZE_ENUM(so_state
);
139 BaseSimpleCPU::unserialize(cp
, section
);
143 TimingSimpleCPU::drain(Event
*drain_event
)
145 // TimingSimpleCPU is ready to drain if it's not waiting for
146 // an access to complete.
147 if (status() == Idle
|| status() == Running
|| status() == SwitchedOut
) {
148 changeState(SimObject::Drained
);
151 changeState(SimObject::Draining
);
152 drainEvent
= drain_event
;
158 TimingSimpleCPU::resume()
160 if (_status
!= SwitchedOut
&& _status
!= Idle
) {
161 assert(system
->getMemoryMode() == System::Timing
);
163 // Delete the old event if it existed.
165 if (fetchEvent
->scheduled())
166 fetchEvent
->deschedule();
171 fetchEvent
= new FetchEvent(this, nextCycle());
174 changeState(SimObject::Running
);
175 previousTick
= curTick
;
179 TimingSimpleCPU::switchOut()
181 assert(status() == Running
|| status() == Idle
);
182 _status
= SwitchedOut
;
183 numCycles
+= curTick
- previousTick
;
185 // If we've been scheduled to resume but are then told to switch out,
186 // we'll need to cancel it.
187 if (fetchEvent
&& fetchEvent
->scheduled())
188 fetchEvent
->deschedule();
193 TimingSimpleCPU::takeOverFrom(BaseCPU
*oldCPU
)
195 BaseCPU::takeOverFrom(oldCPU
, &icachePort
, &dcachePort
);
197 // if any of this CPU's ThreadContexts are active, mark the CPU as
198 // running and schedule its tick event.
199 for (int i
= 0; i
< threadContexts
.size(); ++i
) {
200 ThreadContext
*tc
= threadContexts
[i
];
201 if (tc
->status() == ThreadContext::Active
&& _status
!= Running
) {
207 if (_status
!= Running
) {
214 TimingSimpleCPU::activateContext(int thread_num
, int delay
)
216 assert(thread_num
== 0);
219 assert(_status
== Idle
);
224 // kick things off by initiating the fetch of the next instruction
225 fetchEvent
= new FetchEvent(this, nextCycle(curTick
+ cycles(delay
)));
230 TimingSimpleCPU::suspendContext(int thread_num
)
232 assert(thread_num
== 0);
235 assert(_status
== Running
);
237 // just change status to Idle... if status != Running,
238 // completeInst() will not initiate fetch of next instruction.
247 TimingSimpleCPU::read(Addr addr
, T
&data
, unsigned flags
)
250 new Request(/* asid */ 0, addr
, sizeof(T
), flags
, thread
->readPC(),
251 cpu_id
, /* thread ID */ 0);
254 traceData
->setAddr(req
->getVaddr());
257 // translate to physical address
258 Fault fault
= thread
->translateDataReadReq(req
);
260 // Now do the access.
261 if (fault
== NoFault
) {
265 MemCmd::LoadLockedReq
: MemCmd::ReadReq
),
267 pkt
->dataDynamic
<T
>(new T
);
269 if (!dcachePort
.sendTiming(pkt
)) {
270 _status
= DcacheRetry
;
273 _status
= DcacheWaitResponse
;
274 // memory system takes ownership of packet
278 // This will need a new way to tell if it has a dcache attached.
279 if (req
->isUncacheable())
280 recordEvent("Uncached Read");
288 #ifndef DOXYGEN_SHOULD_SKIP_THIS
292 TimingSimpleCPU::read(Addr addr
, Twin64_t
&data
, unsigned flags
);
296 TimingSimpleCPU::read(Addr addr
, Twin32_t
&data
, unsigned flags
);
300 TimingSimpleCPU::read(Addr addr
, uint64_t &data
, unsigned flags
);
304 TimingSimpleCPU::read(Addr addr
, uint32_t &data
, unsigned flags
);
308 TimingSimpleCPU::read(Addr addr
, uint16_t &data
, unsigned flags
);
312 TimingSimpleCPU::read(Addr addr
, uint8_t &data
, unsigned flags
);
314 #endif //DOXYGEN_SHOULD_SKIP_THIS
318 TimingSimpleCPU::read(Addr addr
, double &data
, unsigned flags
)
320 return read(addr
, *(uint64_t*)&data
, flags
);
325 TimingSimpleCPU::read(Addr addr
, float &data
, unsigned flags
)
327 return read(addr
, *(uint32_t*)&data
, flags
);
333 TimingSimpleCPU::read(Addr addr
, int32_t &data
, unsigned flags
)
335 return read(addr
, (uint32_t&)data
, flags
);
341 TimingSimpleCPU::write(T data
, Addr addr
, unsigned flags
, uint64_t *res
)
344 new Request(/* asid */ 0, addr
, sizeof(T
), flags
, thread
->readPC(),
345 cpu_id
, /* thread ID */ 0);
348 traceData
->setAddr(req
->getVaddr());
351 // translate to physical address
352 Fault fault
= thread
->translateDataWriteReq(req
);
354 // Now do the access.
355 if (fault
== NoFault
) {
356 MemCmd cmd
= MemCmd::WriteReq
; // default
357 bool do_access
= true; // flag to suppress cache access
359 assert(dcache_pkt
== NULL
);
361 if (req
->isLocked()) {
362 cmd
= MemCmd::StoreCondReq
;
363 do_access
= TheISA::handleLockedWrite(thread
, req
);
364 } else if (req
->isSwap()) {
365 cmd
= MemCmd::SwapReq
;
366 if (req
->isCondSwap()) {
368 req
->setExtraData(*res
);
373 dcache_pkt
= new Packet(req
, MemCmd::WriteReq
, Packet::Broadcast
);
374 dcache_pkt
->allocate();
375 dcache_pkt
->set(data
);
377 if (!dcachePort
.sendTiming(dcache_pkt
)) {
378 _status
= DcacheRetry
;
380 _status
= DcacheWaitResponse
;
381 // memory system takes ownership of packet
385 // This will need a new way to tell if it's hooked up to a cache or not.
386 if (req
->isUncacheable())
387 recordEvent("Uncached Write");
393 // If the write needs to have a fault on the access, consider calling
394 // changeStatus() and changing it to "bad addr write" or something.
399 #ifndef DOXYGEN_SHOULD_SKIP_THIS
402 TimingSimpleCPU::write(Twin32_t data
, Addr addr
,
403 unsigned flags
, uint64_t *res
);
407 TimingSimpleCPU::write(Twin64_t data
, Addr addr
,
408 unsigned flags
, uint64_t *res
);
412 TimingSimpleCPU::write(uint64_t data
, Addr addr
,
413 unsigned flags
, uint64_t *res
);
417 TimingSimpleCPU::write(uint32_t data
, Addr addr
,
418 unsigned flags
, uint64_t *res
);
422 TimingSimpleCPU::write(uint16_t data
, Addr addr
,
423 unsigned flags
, uint64_t *res
);
427 TimingSimpleCPU::write(uint8_t data
, Addr addr
,
428 unsigned flags
, uint64_t *res
);
430 #endif //DOXYGEN_SHOULD_SKIP_THIS
434 TimingSimpleCPU::write(double data
, Addr addr
, unsigned flags
, uint64_t *res
)
436 return write(*(uint64_t*)&data
, addr
, flags
, res
);
441 TimingSimpleCPU::write(float data
, Addr addr
, unsigned flags
, uint64_t *res
)
443 return write(*(uint32_t*)&data
, addr
, flags
, res
);
449 TimingSimpleCPU::write(int32_t data
, Addr addr
, unsigned flags
, uint64_t *res
)
451 return write((uint32_t)data
, addr
, flags
, res
);
456 TimingSimpleCPU::fetch()
458 if (!curStaticInst
|| !curStaticInst
->isDelayedCommit())
459 checkForInterrupts();
461 Request
*ifetch_req
= new Request();
462 ifetch_req
->setThreadContext(cpu_id
, /* thread ID */ 0);
463 Fault fault
= setupFetchRequest(ifetch_req
);
465 ifetch_pkt
= new Packet(ifetch_req
, MemCmd::ReadReq
, Packet::Broadcast
);
466 ifetch_pkt
->dataStatic(&inst
);
468 if (fault
== NoFault
) {
469 if (!icachePort
.sendTiming(ifetch_pkt
)) {
470 // Need to wait for retry
471 _status
= IcacheRetry
;
473 // Need to wait for cache to respond
474 _status
= IcacheWaitResponse
;
475 // ownership of packet transferred to memory system
481 // fetch fault: advance directly to next instruction (fault handler)
485 numCycles
+= curTick
- previousTick
;
486 previousTick
= curTick
;
491 TimingSimpleCPU::advanceInst(Fault fault
)
495 if (_status
== Running
) {
496 // kick off fetch of next instruction... callback from icache
497 // response will cause that instruction to be executed,
498 // keeping the CPU running.
505 TimingSimpleCPU::completeIfetch(PacketPtr pkt
)
507 // received a response from the icache: execute the received
509 assert(!pkt
->isError());
510 assert(_status
== IcacheWaitResponse
);
514 numCycles
+= curTick
- previousTick
;
515 previousTick
= curTick
;
517 if (getState() == SimObject::Draining
) {
526 if (curStaticInst
->isMemRef() && !curStaticInst
->isDataPrefetch()) {
527 // load or store: just send to dcache
528 Fault fault
= curStaticInst
->initiateAcc(this, traceData
);
529 if (_status
!= Running
) {
530 // instruction will complete in dcache response callback
531 assert(_status
== DcacheWaitResponse
|| _status
== DcacheRetry
);
532 assert(fault
== NoFault
);
534 if (fault
== NoFault
) {
535 // early fail on store conditional: complete now
536 assert(dcache_pkt
!= NULL
);
537 fault
= curStaticInst
->completeAcc(dcache_pkt
, this,
539 delete dcache_pkt
->req
;
547 // non-memory instruction: execute completely now
548 Fault fault
= curStaticInst
->execute(this, traceData
);
558 TimingSimpleCPU::IcachePort::ITickEvent::process()
560 cpu
->completeIfetch(pkt
);
564 TimingSimpleCPU::IcachePort::recvTiming(PacketPtr pkt
)
566 if (pkt
->isResponse()) {
567 // delay processing of returned data until next CPU clock edge
568 Tick next_tick
= cpu
->nextCycle(curTick
);
570 if (next_tick
== curTick
)
571 cpu
->completeIfetch(pkt
);
573 tickEvent
.schedule(pkt
, next_tick
);
577 else if (pkt
->wasNacked()) {
578 assert(cpu
->_status
== IcacheWaitResponse
);
580 if (!sendTiming(pkt
)) {
581 cpu
->_status
= IcacheRetry
;
582 cpu
->ifetch_pkt
= pkt
;
585 //Snooping a Coherence Request, do nothing
590 TimingSimpleCPU::IcachePort::recvRetry()
592 // we shouldn't get a retry unless we have a packet that we're
593 // waiting to transmit
594 assert(cpu
->ifetch_pkt
!= NULL
);
595 assert(cpu
->_status
== IcacheRetry
);
596 PacketPtr tmp
= cpu
->ifetch_pkt
;
597 if (sendTiming(tmp
)) {
598 cpu
->_status
= IcacheWaitResponse
;
599 cpu
->ifetch_pkt
= NULL
;
604 TimingSimpleCPU::completeDataAccess(PacketPtr pkt
)
606 // received a response from the dcache: complete the load or store
608 assert(!pkt
->isError());
609 assert(_status
== DcacheWaitResponse
);
612 numCycles
+= curTick
- previousTick
;
613 previousTick
= curTick
;
615 Fault fault
= curStaticInst
->completeAcc(pkt
, this, traceData
);
617 if (pkt
->isRead() && pkt
->isLocked()) {
618 TheISA::handleLockedRead(thread
, pkt
->req
);
626 if (getState() == SimObject::Draining
) {
638 TimingSimpleCPU::completeDrain()
640 DPRINTF(Config
, "Done draining\n");
641 changeState(SimObject::Drained
);
642 drainEvent
->process();
646 TimingSimpleCPU::DcachePort::setPeer(Port
*port
)
651 // Update the ThreadContext's memory ports (Functional/Virtual
653 cpu
->tcBase()->connectMemPorts();
658 TimingSimpleCPU::DcachePort::recvTiming(PacketPtr pkt
)
660 if (pkt
->isResponse()) {
661 // delay processing of returned data until next CPU clock edge
662 Tick next_tick
= cpu
->nextCycle(curTick
);
664 if (next_tick
== curTick
)
665 cpu
->completeDataAccess(pkt
);
667 tickEvent
.schedule(pkt
, next_tick
);
671 else if (pkt
->wasNacked()) {
672 assert(cpu
->_status
== DcacheWaitResponse
);
674 if (!sendTiming(pkt
)) {
675 cpu
->_status
= DcacheRetry
;
676 cpu
->dcache_pkt
= pkt
;
679 //Snooping a Coherence Request, do nothing
684 TimingSimpleCPU::DcachePort::DTickEvent::process()
686 cpu
->completeDataAccess(pkt
);
690 TimingSimpleCPU::DcachePort::recvRetry()
692 // we shouldn't get a retry unless we have a packet that we're
693 // waiting to transmit
694 assert(cpu
->dcache_pkt
!= NULL
);
695 assert(cpu
->_status
== DcacheRetry
);
696 PacketPtr tmp
= cpu
->dcache_pkt
;
697 if (sendTiming(tmp
)) {
698 cpu
->_status
= DcacheWaitResponse
;
699 // memory system takes ownership of packet
700 cpu
->dcache_pkt
= NULL
;
705 ////////////////////////////////////////////////////////////////////////
707 // TimingSimpleCPU Simulation Object
709 BEGIN_DECLARE_SIM_OBJECT_PARAMS(TimingSimpleCPU
)
711 Param
<Counter
> max_insts_any_thread
;
712 Param
<Counter
> max_insts_all_threads
;
713 Param
<Counter
> max_loads_any_thread
;
714 Param
<Counter
> max_loads_all_threads
;
715 Param
<Tick
> progress_interval
;
716 SimObjectParam
<System
*> system
;
720 SimObjectParam
<TheISA::ITB
*> itb
;
721 SimObjectParam
<TheISA::DTB
*> dtb
;
724 Param
<bool> do_quiesce
;
725 Param
<bool> do_checkpoint_insts
;
726 Param
<bool> do_statistics_insts
;
728 SimObjectParam
<Process
*> workload
;
729 #endif // FULL_SYSTEM
734 Param
<bool> defer_registration
;
736 Param
<bool> function_trace
;
737 Param
<Tick
> function_trace_start
;
738 Param
<bool> simulate_stalls
;
740 END_DECLARE_SIM_OBJECT_PARAMS(TimingSimpleCPU
)
742 BEGIN_INIT_SIM_OBJECT_PARAMS(TimingSimpleCPU
)
744 INIT_PARAM(max_insts_any_thread
,
745 "terminate when any thread reaches this inst count"),
746 INIT_PARAM(max_insts_all_threads
,
747 "terminate when all threads have reached this inst count"),
748 INIT_PARAM(max_loads_any_thread
,
749 "terminate when any thread reaches this load count"),
750 INIT_PARAM(max_loads_all_threads
,
751 "terminate when all threads have reached this load count"),
752 INIT_PARAM(progress_interval
, "Progress interval"),
753 INIT_PARAM(system
, "system object"),
754 INIT_PARAM(cpu_id
, "processor ID"),
757 INIT_PARAM(itb
, "Instruction TLB"),
758 INIT_PARAM(dtb
, "Data TLB"),
759 INIT_PARAM(profile
, ""),
760 INIT_PARAM(do_quiesce
, ""),
761 INIT_PARAM(do_checkpoint_insts
, ""),
762 INIT_PARAM(do_statistics_insts
, ""),
764 INIT_PARAM(workload
, "processes to run"),
765 #endif // FULL_SYSTEM
767 INIT_PARAM(clock
, "clock speed"),
768 INIT_PARAM_DFLT(phase
, "clock phase", 0),
769 INIT_PARAM(defer_registration
, "defer system registration (for sampling)"),
770 INIT_PARAM(width
, "cpu width"),
771 INIT_PARAM(function_trace
, "Enable function trace"),
772 INIT_PARAM(function_trace_start
, "Cycle to start function trace"),
773 INIT_PARAM(simulate_stalls
, "Simulate cache stall cycles")
775 END_INIT_SIM_OBJECT_PARAMS(TimingSimpleCPU
)
778 CREATE_SIM_OBJECT(TimingSimpleCPU
)
780 TimingSimpleCPU::Params
*params
= new TimingSimpleCPU::Params();
781 params
->name
= getInstanceName();
782 params
->numberOfThreads
= 1;
783 params
->max_insts_any_thread
= max_insts_any_thread
;
784 params
->max_insts_all_threads
= max_insts_all_threads
;
785 params
->max_loads_any_thread
= max_loads_any_thread
;
786 params
->max_loads_all_threads
= max_loads_all_threads
;
787 params
->progress_interval
= progress_interval
;
788 params
->deferRegistration
= defer_registration
;
789 params
->clock
= clock
;
790 params
->phase
= phase
;
791 params
->functionTrace
= function_trace
;
792 params
->functionTraceStart
= function_trace_start
;
793 params
->system
= system
;
794 params
->cpu_id
= cpu_id
;
799 params
->profile
= profile
;
800 params
->do_quiesce
= do_quiesce
;
801 params
->do_checkpoint_insts
= do_checkpoint_insts
;
802 params
->do_statistics_insts
= do_statistics_insts
;
804 params
->process
= workload
;
807 TimingSimpleCPU
*cpu
= new TimingSimpleCPU(params
);
811 REGISTER_SIM_OBJECT("TimingSimpleCPU", TimingSimpleCPU
)