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/mmaped_ipr.hh"
33#include "arch/utility.hh"
34#include "cpu/exetrace.hh"
35#include "cpu/simple/atomic.hh"
36#include "mem/packet.hh"
37#include "mem/packet_access.hh"
38#include "sim/builder.hh"
39#include "sim/system.hh"
40
41using namespace std;
42using namespace TheISA;
43
44AtomicSimpleCPU::TickEvent::TickEvent(AtomicSimpleCPU *c)
45 : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c)
46{
47}
48
49
50void
51AtomicSimpleCPU::TickEvent::process()
52{
53 cpu->tick();
54}
55
56const char *
57AtomicSimpleCPU::TickEvent::description()
58{
59 return "AtomicSimpleCPU tick event";
60}
61
62Port *
63AtomicSimpleCPU::getPort(const std::string &if_name, int idx)
64{
65 if (if_name == "dcache_port")
66 return &dcachePort;
67 else if (if_name == "icache_port")
68 return &icachePort;
69 else
70 panic("No Such Port\n");
71}
72
73void
74AtomicSimpleCPU::init()
75{
76 BaseCPU::init();
77#if FULL_SYSTEM
78 for (int i = 0; i < threadContexts.size(); ++i) {
79 ThreadContext *tc = threadContexts[i];
80
81 // initialize the mem pointers
82 tc->init();
83
84 // initialize CPU, including PC
85 TheISA::initCPU(tc, tc->readCpuId());
86 }
87#endif
88}
89
90bool
91AtomicSimpleCPU::CpuPort::recvTiming(PacketPtr pkt)
92{
93 panic("AtomicSimpleCPU doesn't expect recvTiming callback!");
94 return true;
95}
96
97Tick
98AtomicSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt)
99{
100 //Snooping a coherence request, just return
101 return 0;
102}
103
104void
105AtomicSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt)
106{
107 //No internal storage to update, just return
108 return;
109}
110
111void
112AtomicSimpleCPU::CpuPort::recvStatusChange(Status status)
113{
114 if (status == RangeChange) {
115 if (!snoopRangeSent) {
116 snoopRangeSent = true;
117 sendStatusChange(Port::RangeChange);
118 }
119 return;
120 }
121
122 panic("AtomicSimpleCPU doesn't expect recvStatusChange callback!");
123}
124
125void
126AtomicSimpleCPU::CpuPort::recvRetry()
127{
128 panic("AtomicSimpleCPU doesn't expect recvRetry callback!");
129}
130
131
132AtomicSimpleCPU::AtomicSimpleCPU(Params *p)
133 : BaseSimpleCPU(p), tickEvent(this),
134 width(p->width), simulate_stalls(p->simulate_stalls),
135 icachePort(name() + "-iport", this), dcachePort(name() + "-iport", this)
136{
137 _status = Idle;
138
139 icachePort.snoopRangeSent = false;
140 dcachePort.snoopRangeSent = false;
141
142 ifetch_req = new Request();
143 ifetch_req->setThreadContext(p->cpu_id, 0); // Add thread ID if we add MT
144 ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast);
145 ifetch_pkt->dataStatic(&inst);
146
147 data_read_req = new Request();
148 data_read_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too
149 data_read_pkt = new Packet(data_read_req, Packet::ReadReq,
150 Packet::Broadcast);
151 data_read_pkt->dataStatic(&dataReg);
152
153 data_write_req = new Request();
154 data_write_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too
155 data_write_pkt = new Packet(data_write_req, Packet::WriteReq,
156 Packet::Broadcast);
157}
158
159
160AtomicSimpleCPU::~AtomicSimpleCPU()
161{
162}
163
164void
165AtomicSimpleCPU::serialize(ostream &os)
166{
167 SimObject::State so_state = SimObject::getState();
168 SERIALIZE_ENUM(so_state);
169 Status _status = status();
170 SERIALIZE_ENUM(_status);
171 BaseSimpleCPU::serialize(os);
172 nameOut(os, csprintf("%s.tickEvent", name()));
173 tickEvent.serialize(os);
174}
175
176void
177AtomicSimpleCPU::unserialize(Checkpoint *cp, const string §ion)
178{
179 SimObject::State so_state;
180 UNSERIALIZE_ENUM(so_state);
181 UNSERIALIZE_ENUM(_status);
182 BaseSimpleCPU::unserialize(cp, section);
183 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
184}
185
186void
187AtomicSimpleCPU::resume()
188{
189 if (_status != SwitchedOut && _status != Idle) {
190 assert(system->getMemoryMode() == System::Atomic);
191
192 changeState(SimObject::Running);
193 if (thread->status() == ThreadContext::Active) {
194 if (!tickEvent.scheduled()) {
195 tickEvent.schedule(nextCycle());
196 }
197 }
198 }
199}
200
201void
202AtomicSimpleCPU::switchOut()
203{
204 assert(status() == Running || status() == Idle);
205 _status = SwitchedOut;
206
207 tickEvent.squash();
208}
209
210
211void
212AtomicSimpleCPU::takeOverFrom(BaseCPU *oldCPU)
213{
214 BaseCPU::takeOverFrom(oldCPU);
215
216 assert(!tickEvent.scheduled());
217
218 // if any of this CPU's ThreadContexts are active, mark the CPU as
219 // running and schedule its tick event.
220 for (int i = 0; i < threadContexts.size(); ++i) {
221 ThreadContext *tc = threadContexts[i];
222 if (tc->status() == ThreadContext::Active && _status != Running) {
223 _status = Running;
224 tickEvent.schedule(nextCycle());
225 break;
226 }
227 }
228 if (_status != Running) {
229 _status = Idle;
230 }
231}
232
233
234void
235AtomicSimpleCPU::activateContext(int thread_num, int delay)
236{
237 assert(thread_num == 0);
238 assert(thread);
239
240 assert(_status == Idle);
241 assert(!tickEvent.scheduled());
242
243 notIdleFraction++;
244 //Make sure ticks are still on multiples of cycles
245 tickEvent.schedule(nextCycle(curTick + cycles(delay)));
246 _status = Running;
247}
248
249
250void
251AtomicSimpleCPU::suspendContext(int thread_num)
252{
253 assert(thread_num == 0);
254 assert(thread);
255
256 assert(_status == Running);
257
258 // tick event may not be scheduled if this gets called from inside
259 // an instruction's execution, e.g. "quiesce"
260 if (tickEvent.scheduled())
261 tickEvent.deschedule();
262
263 notIdleFraction--;
264 _status = Idle;
265}
266
267
268template <class T>
269Fault
270AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags)
271{
272 // use the CPU's statically allocated read request and packet objects
273 Request *req = data_read_req;
274 PacketPtr pkt = data_read_pkt;
275
276 req->setVirt(0, addr, sizeof(T), flags, thread->readPC());
277
278 if (traceData) {
279 traceData->setAddr(addr);
280 }
281
282 // translate to physical address
283 Fault fault = thread->translateDataReadReq(req);
284
285 // Now do the access.
286 if (fault == NoFault) {
287 pkt->reinitFromRequest();
288
289 if (req->isMmapedIpr())
290 dcache_latency = TheISA::handleIprRead(thread->getTC(),pkt);
291 else
292 dcache_latency = dcachePort.sendAtomic(pkt);
293 dcache_access = true;
294
295 assert(pkt->result == Packet::Success);
296 data = pkt->get<T>();
297
298 if (req->isLocked()) {
299 TheISA::handleLockedRead(thread, req);
300 }
301 }
302
303 // This will need a new way to tell if it has a dcache attached.
304 if (req->isUncacheable())
305 recordEvent("Uncached Read");
306
307 return fault;
308}
309
310#ifndef DOXYGEN_SHOULD_SKIP_THIS
311
312template
313Fault
314AtomicSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
315
316template
317Fault
318AtomicSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags);
319
320template
321Fault
322AtomicSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags);
323
324template
325Fault
326AtomicSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags);
327
328#endif //DOXYGEN_SHOULD_SKIP_THIS
329
330template<>
331Fault
332AtomicSimpleCPU::read(Addr addr, double &data, unsigned flags)
333{
334 return read(addr, *(uint64_t*)&data, flags);
335}
336
337template<>
338Fault
339AtomicSimpleCPU::read(Addr addr, float &data, unsigned flags)
340{
341 return read(addr, *(uint32_t*)&data, flags);
342}
343
344
345template<>
346Fault
347AtomicSimpleCPU::read(Addr addr, int32_t &data, unsigned flags)
348{
349 return read(addr, (uint32_t&)data, flags);
350}
351
352
353template <class T>
354Fault
355AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
356{
357 // use the CPU's statically allocated write request and packet objects
358 Request *req = data_write_req;
359 PacketPtr pkt = data_write_pkt;
360
361 req->setVirt(0, addr, sizeof(T), flags, thread->readPC());
362
363 if (traceData) {
364 traceData->setAddr(addr);
365 }
366
367 // translate to physical address
368 Fault fault = thread->translateDataWriteReq(req);
369
370 // Now do the access.
371 if (fault == NoFault) {
372 bool do_access = true; // flag to suppress cache access
373
374 if (req->isLocked()) {
375 do_access = TheISA::handleLockedWrite(thread, req);
376 }
377
378 if (do_access) {
379 pkt->reinitFromRequest();
380 pkt->dataStatic(&data);
381
382 if (req->isMmapedIpr()) {
383 dcache_latency = TheISA::handleIprWrite(thread->getTC(), pkt);
384 } else {
385 data = htog(data);
386 dcache_latency = dcachePort.sendAtomic(pkt);
387 }
388 dcache_access = true;
389
390 assert(pkt->result == Packet::Success);
391 }
392
393 if (req->isLocked()) {
394 uint64_t scResult = req->getScResult();
395 if (scResult != 0) {
396 // clear failure counter
397 thread->setStCondFailures(0);
398 }
399 if (res) {
400 *res = req->getScResult();
401 }
402 }
403 }
404
405 // This will need a new way to tell if it's hooked up to a cache or not.
406 if (req->isUncacheable())
407 recordEvent("Uncached Write");
408
409 // If the write needs to have a fault on the access, consider calling
410 // changeStatus() and changing it to "bad addr write" or something.
411 return fault;
412}
413
414
415#ifndef DOXYGEN_SHOULD_SKIP_THIS
416template
417Fault
418AtomicSimpleCPU::write(uint64_t data, Addr addr,
419 unsigned flags, uint64_t *res);
420
421template
422Fault
423AtomicSimpleCPU::write(uint32_t data, Addr addr,
424 unsigned flags, uint64_t *res);
425
426template
427Fault
428AtomicSimpleCPU::write(uint16_t data, Addr addr,
429 unsigned flags, uint64_t *res);
430
431template
432Fault
433AtomicSimpleCPU::write(uint8_t data, Addr addr,
434 unsigned flags, uint64_t *res);
435
436#endif //DOXYGEN_SHOULD_SKIP_THIS
437
438template<>
439Fault
440AtomicSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res)
441{
442 return write(*(uint64_t*)&data, addr, flags, res);
443}
444
445template<>
446Fault
447AtomicSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res)
448{
449 return write(*(uint32_t*)&data, addr, flags, res);
450}
451
452
453template<>
454Fault
455AtomicSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
456{
457 return write((uint32_t)data, addr, flags, res);
458}
459
460
461void
462AtomicSimpleCPU::tick()
463{
464 Tick latency = cycles(1); // instruction takes one cycle by default
465
466 for (int i = 0; i < width; ++i) {
467 numCycles++;
468
469 if (!curStaticInst || !curStaticInst->isDelayedCommit())
470 checkForInterrupts();
471
472 Fault fault = setupFetchRequest(ifetch_req);
473
474 if (fault == NoFault) {
475 ifetch_pkt->reinitFromRequest();
476
477 Tick icache_latency = icachePort.sendAtomic(ifetch_pkt);
478 // ifetch_req is initialized to read the instruction directly
479 // into the CPU object's inst field.
480
481 dcache_access = false; // assume no dcache access
482 preExecute();
483 fault = curStaticInst->execute(this, traceData);
484 postExecute();
485
486 if (simulate_stalls) {
487 Tick icache_stall = icache_latency - cycles(1);
488 Tick dcache_stall =
489 dcache_access ? dcache_latency - cycles(1) : 0;
490 Tick stall_cycles = (icache_stall + dcache_stall) / cycles(1);
491 if (cycles(stall_cycles) < (icache_stall + dcache_stall))
492 latency += cycles(stall_cycles+1);
493 else
494 latency += cycles(stall_cycles);
495 }
496
497 }
498
499 advancePC(fault);
500 }
501
502 if (_status != Idle)
503 tickEvent.schedule(curTick + latency);
504}
505
506
507////////////////////////////////////////////////////////////////////////
508//
509// AtomicSimpleCPU Simulation Object
510//
511BEGIN_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
512
513 Param<Counter> max_insts_any_thread;
514 Param<Counter> max_insts_all_threads;
515 Param<Counter> max_loads_any_thread;
516 Param<Counter> max_loads_all_threads;
517 Param<Tick> progress_interval;
518 SimObjectParam<System *> system;
519 Param<int> cpu_id;
520
521#if FULL_SYSTEM
522 SimObjectParam<TheISA::ITB *> itb;
523 SimObjectParam<TheISA::DTB *> dtb;
524 Param<Tick> profile;
525
526 Param<bool> do_quiesce;
527 Param<bool> do_checkpoint_insts;
528 Param<bool> do_statistics_insts;
529#else
530 SimObjectParam<Process *> workload;
531#endif // FULL_SYSTEM
532
533 Param<int> clock;
534 Param<int> phase;
535
536 Param<bool> defer_registration;
537 Param<int> width;
538 Param<bool> function_trace;
539 Param<Tick> function_trace_start;
540 Param<bool> simulate_stalls;
541
542END_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
543
544BEGIN_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
545
546 INIT_PARAM(max_insts_any_thread,
547 "terminate when any thread reaches this inst count"),
548 INIT_PARAM(max_insts_all_threads,
549 "terminate when all threads have reached this inst count"),
550 INIT_PARAM(max_loads_any_thread,
551 "terminate when any thread reaches this load count"),
552 INIT_PARAM(max_loads_all_threads,
553 "terminate when all threads have reached this load count"),
554 INIT_PARAM(progress_interval, "Progress interval"),
555 INIT_PARAM(system, "system object"),
556 INIT_PARAM(cpu_id, "processor ID"),
557
558#if FULL_SYSTEM
559 INIT_PARAM(itb, "Instruction TLB"),
560 INIT_PARAM(dtb, "Data TLB"),
561 INIT_PARAM(profile, ""),
562 INIT_PARAM(do_quiesce, ""),
563 INIT_PARAM(do_checkpoint_insts, ""),
564 INIT_PARAM(do_statistics_insts, ""),
565#else
566 INIT_PARAM(workload, "processes to run"),
567#endif // FULL_SYSTEM
568
569 INIT_PARAM(clock, "clock speed"),
570 INIT_PARAM_DFLT(phase, "clock phase", 0),
571 INIT_PARAM(defer_registration, "defer system registration (for sampling)"),
572 INIT_PARAM(width, "cpu width"),
573 INIT_PARAM(function_trace, "Enable function trace"),
574 INIT_PARAM(function_trace_start, "Cycle to start function trace"),
575 INIT_PARAM(simulate_stalls, "Simulate cache stall cycles")
576
577END_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
578
579
580CREATE_SIM_OBJECT(AtomicSimpleCPU)
581{
582 AtomicSimpleCPU::Params *params = new AtomicSimpleCPU::Params();
583 params->name = getInstanceName();
584 params->numberOfThreads = 1;
585 params->max_insts_any_thread = max_insts_any_thread;
586 params->max_insts_all_threads = max_insts_all_threads;
587 params->max_loads_any_thread = max_loads_any_thread;
588 params->max_loads_all_threads = max_loads_all_threads;
589 params->progress_interval = progress_interval;
590 params->deferRegistration = defer_registration;
591 params->phase = phase;
592 params->clock = clock;
593 params->functionTrace = function_trace;
594 params->functionTraceStart = function_trace_start;
595 params->width = width;
596 params->simulate_stalls = simulate_stalls;
597 params->system = system;
598 params->cpu_id = cpu_id;
599
600#if FULL_SYSTEM
601 params->itb = itb;
602 params->dtb = dtb;
603 params->profile = profile;
604 params->do_quiesce = do_quiesce;
605 params->do_checkpoint_insts = do_checkpoint_insts;
606 params->do_statistics_insts = do_statistics_insts;
607#else
608 params->process = workload;
609#endif
610
611 AtomicSimpleCPU *cpu = new AtomicSimpleCPU(params);
612 return cpu;
613}
614
615REGISTER_SIM_OBJECT("AtomicSimpleCPU", AtomicSimpleCPU)
616
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/mmaped_ipr.hh"
33#include "arch/utility.hh"
34#include "cpu/exetrace.hh"
35#include "cpu/simple/atomic.hh"
36#include "mem/packet.hh"
37#include "mem/packet_access.hh"
38#include "sim/builder.hh"
39#include "sim/system.hh"
40
41using namespace std;
42using namespace TheISA;
43
44AtomicSimpleCPU::TickEvent::TickEvent(AtomicSimpleCPU *c)
45 : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c)
46{
47}
48
49
50void
51AtomicSimpleCPU::TickEvent::process()
52{
53 cpu->tick();
54}
55
56const char *
57AtomicSimpleCPU::TickEvent::description()
58{
59 return "AtomicSimpleCPU tick event";
60}
61
62Port *
63AtomicSimpleCPU::getPort(const std::string &if_name, int idx)
64{
65 if (if_name == "dcache_port")
66 return &dcachePort;
67 else if (if_name == "icache_port")
68 return &icachePort;
69 else
70 panic("No Such Port\n");
71}
72
73void
74AtomicSimpleCPU::init()
75{
76 BaseCPU::init();
77#if FULL_SYSTEM
78 for (int i = 0; i < threadContexts.size(); ++i) {
79 ThreadContext *tc = threadContexts[i];
80
81 // initialize the mem pointers
82 tc->init();
83
84 // initialize CPU, including PC
85 TheISA::initCPU(tc, tc->readCpuId());
86 }
87#endif
88}
89
90bool
91AtomicSimpleCPU::CpuPort::recvTiming(PacketPtr pkt)
92{
93 panic("AtomicSimpleCPU doesn't expect recvTiming callback!");
94 return true;
95}
96
97Tick
98AtomicSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt)
99{
100 //Snooping a coherence request, just return
101 return 0;
102}
103
104void
105AtomicSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt)
106{
107 //No internal storage to update, just return
108 return;
109}
110
111void
112AtomicSimpleCPU::CpuPort::recvStatusChange(Status status)
113{
114 if (status == RangeChange) {
115 if (!snoopRangeSent) {
116 snoopRangeSent = true;
117 sendStatusChange(Port::RangeChange);
118 }
119 return;
120 }
121
122 panic("AtomicSimpleCPU doesn't expect recvStatusChange callback!");
123}
124
125void
126AtomicSimpleCPU::CpuPort::recvRetry()
127{
128 panic("AtomicSimpleCPU doesn't expect recvRetry callback!");
129}
130
131
132AtomicSimpleCPU::AtomicSimpleCPU(Params *p)
133 : BaseSimpleCPU(p), tickEvent(this),
134 width(p->width), simulate_stalls(p->simulate_stalls),
135 icachePort(name() + "-iport", this), dcachePort(name() + "-iport", this)
136{
137 _status = Idle;
138
139 icachePort.snoopRangeSent = false;
140 dcachePort.snoopRangeSent = false;
141
142 ifetch_req = new Request();
143 ifetch_req->setThreadContext(p->cpu_id, 0); // Add thread ID if we add MT
144 ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast);
145 ifetch_pkt->dataStatic(&inst);
146
147 data_read_req = new Request();
148 data_read_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too
149 data_read_pkt = new Packet(data_read_req, Packet::ReadReq,
150 Packet::Broadcast);
151 data_read_pkt->dataStatic(&dataReg);
152
153 data_write_req = new Request();
154 data_write_req->setThreadContext(p->cpu_id, 0); // Add thread ID here too
155 data_write_pkt = new Packet(data_write_req, Packet::WriteReq,
156 Packet::Broadcast);
157}
158
159
160AtomicSimpleCPU::~AtomicSimpleCPU()
161{
162}
163
164void
165AtomicSimpleCPU::serialize(ostream &os)
166{
167 SimObject::State so_state = SimObject::getState();
168 SERIALIZE_ENUM(so_state);
169 Status _status = status();
170 SERIALIZE_ENUM(_status);
171 BaseSimpleCPU::serialize(os);
172 nameOut(os, csprintf("%s.tickEvent", name()));
173 tickEvent.serialize(os);
174}
175
176void
177AtomicSimpleCPU::unserialize(Checkpoint *cp, const string §ion)
178{
179 SimObject::State so_state;
180 UNSERIALIZE_ENUM(so_state);
181 UNSERIALIZE_ENUM(_status);
182 BaseSimpleCPU::unserialize(cp, section);
183 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
184}
185
186void
187AtomicSimpleCPU::resume()
188{
189 if (_status != SwitchedOut && _status != Idle) {
190 assert(system->getMemoryMode() == System::Atomic);
191
192 changeState(SimObject::Running);
193 if (thread->status() == ThreadContext::Active) {
194 if (!tickEvent.scheduled()) {
195 tickEvent.schedule(nextCycle());
196 }
197 }
198 }
199}
200
201void
202AtomicSimpleCPU::switchOut()
203{
204 assert(status() == Running || status() == Idle);
205 _status = SwitchedOut;
206
207 tickEvent.squash();
208}
209
210
211void
212AtomicSimpleCPU::takeOverFrom(BaseCPU *oldCPU)
213{
214 BaseCPU::takeOverFrom(oldCPU);
215
216 assert(!tickEvent.scheduled());
217
218 // if any of this CPU's ThreadContexts are active, mark the CPU as
219 // running and schedule its tick event.
220 for (int i = 0; i < threadContexts.size(); ++i) {
221 ThreadContext *tc = threadContexts[i];
222 if (tc->status() == ThreadContext::Active && _status != Running) {
223 _status = Running;
224 tickEvent.schedule(nextCycle());
225 break;
226 }
227 }
228 if (_status != Running) {
229 _status = Idle;
230 }
231}
232
233
234void
235AtomicSimpleCPU::activateContext(int thread_num, int delay)
236{
237 assert(thread_num == 0);
238 assert(thread);
239
240 assert(_status == Idle);
241 assert(!tickEvent.scheduled());
242
243 notIdleFraction++;
244 //Make sure ticks are still on multiples of cycles
245 tickEvent.schedule(nextCycle(curTick + cycles(delay)));
246 _status = Running;
247}
248
249
250void
251AtomicSimpleCPU::suspendContext(int thread_num)
252{
253 assert(thread_num == 0);
254 assert(thread);
255
256 assert(_status == Running);
257
258 // tick event may not be scheduled if this gets called from inside
259 // an instruction's execution, e.g. "quiesce"
260 if (tickEvent.scheduled())
261 tickEvent.deschedule();
262
263 notIdleFraction--;
264 _status = Idle;
265}
266
267
268template <class T>
269Fault
270AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags)
271{
272 // use the CPU's statically allocated read request and packet objects
273 Request *req = data_read_req;
274 PacketPtr pkt = data_read_pkt;
275
276 req->setVirt(0, addr, sizeof(T), flags, thread->readPC());
277
278 if (traceData) {
279 traceData->setAddr(addr);
280 }
281
282 // translate to physical address
283 Fault fault = thread->translateDataReadReq(req);
284
285 // Now do the access.
286 if (fault == NoFault) {
287 pkt->reinitFromRequest();
288
289 if (req->isMmapedIpr())
290 dcache_latency = TheISA::handleIprRead(thread->getTC(),pkt);
291 else
292 dcache_latency = dcachePort.sendAtomic(pkt);
293 dcache_access = true;
294
295 assert(pkt->result == Packet::Success);
296 data = pkt->get<T>();
297
298 if (req->isLocked()) {
299 TheISA::handleLockedRead(thread, req);
300 }
301 }
302
303 // This will need a new way to tell if it has a dcache attached.
304 if (req->isUncacheable())
305 recordEvent("Uncached Read");
306
307 return fault;
308}
309
310#ifndef DOXYGEN_SHOULD_SKIP_THIS
311
312template
313Fault
314AtomicSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
315
316template
317Fault
318AtomicSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags);
319
320template
321Fault
322AtomicSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags);
323
324template
325Fault
326AtomicSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags);
327
328#endif //DOXYGEN_SHOULD_SKIP_THIS
329
330template<>
331Fault
332AtomicSimpleCPU::read(Addr addr, double &data, unsigned flags)
333{
334 return read(addr, *(uint64_t*)&data, flags);
335}
336
337template<>
338Fault
339AtomicSimpleCPU::read(Addr addr, float &data, unsigned flags)
340{
341 return read(addr, *(uint32_t*)&data, flags);
342}
343
344
345template<>
346Fault
347AtomicSimpleCPU::read(Addr addr, int32_t &data, unsigned flags)
348{
349 return read(addr, (uint32_t&)data, flags);
350}
351
352
353template <class T>
354Fault
355AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
356{
357 // use the CPU's statically allocated write request and packet objects
358 Request *req = data_write_req;
359 PacketPtr pkt = data_write_pkt;
360
361 req->setVirt(0, addr, sizeof(T), flags, thread->readPC());
362
363 if (traceData) {
364 traceData->setAddr(addr);
365 }
366
367 // translate to physical address
368 Fault fault = thread->translateDataWriteReq(req);
369
370 // Now do the access.
371 if (fault == NoFault) {
372 bool do_access = true; // flag to suppress cache access
373
374 if (req->isLocked()) {
375 do_access = TheISA::handleLockedWrite(thread, req);
376 }
377
378 if (do_access) {
379 pkt->reinitFromRequest();
380 pkt->dataStatic(&data);
381
382 if (req->isMmapedIpr()) {
383 dcache_latency = TheISA::handleIprWrite(thread->getTC(), pkt);
384 } else {
385 data = htog(data);
386 dcache_latency = dcachePort.sendAtomic(pkt);
387 }
388 dcache_access = true;
389
390 assert(pkt->result == Packet::Success);
391 }
392
393 if (req->isLocked()) {
394 uint64_t scResult = req->getScResult();
395 if (scResult != 0) {
396 // clear failure counter
397 thread->setStCondFailures(0);
398 }
399 if (res) {
400 *res = req->getScResult();
401 }
402 }
403 }
404
405 // This will need a new way to tell if it's hooked up to a cache or not.
406 if (req->isUncacheable())
407 recordEvent("Uncached Write");
408
409 // If the write needs to have a fault on the access, consider calling
410 // changeStatus() and changing it to "bad addr write" or something.
411 return fault;
412}
413
414
415#ifndef DOXYGEN_SHOULD_SKIP_THIS
416template
417Fault
418AtomicSimpleCPU::write(uint64_t data, Addr addr,
419 unsigned flags, uint64_t *res);
420
421template
422Fault
423AtomicSimpleCPU::write(uint32_t data, Addr addr,
424 unsigned flags, uint64_t *res);
425
426template
427Fault
428AtomicSimpleCPU::write(uint16_t data, Addr addr,
429 unsigned flags, uint64_t *res);
430
431template
432Fault
433AtomicSimpleCPU::write(uint8_t data, Addr addr,
434 unsigned flags, uint64_t *res);
435
436#endif //DOXYGEN_SHOULD_SKIP_THIS
437
438template<>
439Fault
440AtomicSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res)
441{
442 return write(*(uint64_t*)&data, addr, flags, res);
443}
444
445template<>
446Fault
447AtomicSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res)
448{
449 return write(*(uint32_t*)&data, addr, flags, res);
450}
451
452
453template<>
454Fault
455AtomicSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
456{
457 return write((uint32_t)data, addr, flags, res);
458}
459
460
461void
462AtomicSimpleCPU::tick()
463{
464 Tick latency = cycles(1); // instruction takes one cycle by default
465
466 for (int i = 0; i < width; ++i) {
467 numCycles++;
468
469 if (!curStaticInst || !curStaticInst->isDelayedCommit())
470 checkForInterrupts();
471
472 Fault fault = setupFetchRequest(ifetch_req);
473
474 if (fault == NoFault) {
475 ifetch_pkt->reinitFromRequest();
476
477 Tick icache_latency = icachePort.sendAtomic(ifetch_pkt);
478 // ifetch_req is initialized to read the instruction directly
479 // into the CPU object's inst field.
480
481 dcache_access = false; // assume no dcache access
482 preExecute();
483 fault = curStaticInst->execute(this, traceData);
484 postExecute();
485
486 if (simulate_stalls) {
487 Tick icache_stall = icache_latency - cycles(1);
488 Tick dcache_stall =
489 dcache_access ? dcache_latency - cycles(1) : 0;
490 Tick stall_cycles = (icache_stall + dcache_stall) / cycles(1);
491 if (cycles(stall_cycles) < (icache_stall + dcache_stall))
492 latency += cycles(stall_cycles+1);
493 else
494 latency += cycles(stall_cycles);
495 }
496
497 }
498
499 advancePC(fault);
500 }
501
502 if (_status != Idle)
503 tickEvent.schedule(curTick + latency);
504}
505
506
507////////////////////////////////////////////////////////////////////////
508//
509// AtomicSimpleCPU Simulation Object
510//
511BEGIN_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
512
513 Param<Counter> max_insts_any_thread;
514 Param<Counter> max_insts_all_threads;
515 Param<Counter> max_loads_any_thread;
516 Param<Counter> max_loads_all_threads;
517 Param<Tick> progress_interval;
518 SimObjectParam<System *> system;
519 Param<int> cpu_id;
520
521#if FULL_SYSTEM
522 SimObjectParam<TheISA::ITB *> itb;
523 SimObjectParam<TheISA::DTB *> dtb;
524 Param<Tick> profile;
525
526 Param<bool> do_quiesce;
527 Param<bool> do_checkpoint_insts;
528 Param<bool> do_statistics_insts;
529#else
530 SimObjectParam<Process *> workload;
531#endif // FULL_SYSTEM
532
533 Param<int> clock;
534 Param<int> phase;
535
536 Param<bool> defer_registration;
537 Param<int> width;
538 Param<bool> function_trace;
539 Param<Tick> function_trace_start;
540 Param<bool> simulate_stalls;
541
542END_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
543
544BEGIN_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
545
546 INIT_PARAM(max_insts_any_thread,
547 "terminate when any thread reaches this inst count"),
548 INIT_PARAM(max_insts_all_threads,
549 "terminate when all threads have reached this inst count"),
550 INIT_PARAM(max_loads_any_thread,
551 "terminate when any thread reaches this load count"),
552 INIT_PARAM(max_loads_all_threads,
553 "terminate when all threads have reached this load count"),
554 INIT_PARAM(progress_interval, "Progress interval"),
555 INIT_PARAM(system, "system object"),
556 INIT_PARAM(cpu_id, "processor ID"),
557
558#if FULL_SYSTEM
559 INIT_PARAM(itb, "Instruction TLB"),
560 INIT_PARAM(dtb, "Data TLB"),
561 INIT_PARAM(profile, ""),
562 INIT_PARAM(do_quiesce, ""),
563 INIT_PARAM(do_checkpoint_insts, ""),
564 INIT_PARAM(do_statistics_insts, ""),
565#else
566 INIT_PARAM(workload, "processes to run"),
567#endif // FULL_SYSTEM
568
569 INIT_PARAM(clock, "clock speed"),
570 INIT_PARAM_DFLT(phase, "clock phase", 0),
571 INIT_PARAM(defer_registration, "defer system registration (for sampling)"),
572 INIT_PARAM(width, "cpu width"),
573 INIT_PARAM(function_trace, "Enable function trace"),
574 INIT_PARAM(function_trace_start, "Cycle to start function trace"),
575 INIT_PARAM(simulate_stalls, "Simulate cache stall cycles")
576
577END_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU)
578
579
580CREATE_SIM_OBJECT(AtomicSimpleCPU)
581{
582 AtomicSimpleCPU::Params *params = new AtomicSimpleCPU::Params();
583 params->name = getInstanceName();
584 params->numberOfThreads = 1;
585 params->max_insts_any_thread = max_insts_any_thread;
586 params->max_insts_all_threads = max_insts_all_threads;
587 params->max_loads_any_thread = max_loads_any_thread;
588 params->max_loads_all_threads = max_loads_all_threads;
589 params->progress_interval = progress_interval;
590 params->deferRegistration = defer_registration;
591 params->phase = phase;
592 params->clock = clock;
593 params->functionTrace = function_trace;
594 params->functionTraceStart = function_trace_start;
595 params->width = width;
596 params->simulate_stalls = simulate_stalls;
597 params->system = system;
598 params->cpu_id = cpu_id;
599
600#if FULL_SYSTEM
601 params->itb = itb;
602 params->dtb = dtb;
603 params->profile = profile;
604 params->do_quiesce = do_quiesce;
605 params->do_checkpoint_insts = do_checkpoint_insts;
606 params->do_statistics_insts = do_statistics_insts;
607#else
608 params->process = workload;
609#endif
610
611 AtomicSimpleCPU *cpu = new AtomicSimpleCPU(params);
612 return cpu;
613}
614
615REGISTER_SIM_OBJECT("AtomicSimpleCPU", AtomicSimpleCPU)
616