atomic.cc revision 3169:65bef767b5de
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/utility.hh" 32#include "cpu/exetrace.hh" 33#include "cpu/simple/atomic.hh" 34#include "mem/packet_impl.hh" 35#include "sim/builder.hh" 36#include "sim/system.hh" 37 38using namespace std; 39using namespace TheISA; 40 41AtomicSimpleCPU::TickEvent::TickEvent(AtomicSimpleCPU *c) 42 : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c) 43{ 44} 45 46 47void 48AtomicSimpleCPU::TickEvent::process() 49{ 50 cpu->tick(); 51} 52 53const char * 54AtomicSimpleCPU::TickEvent::description() 55{ 56 return "AtomicSimpleCPU tick event"; 57} 58 59Port * 60AtomicSimpleCPU::getPort(const std::string &if_name, int idx) 61{ 62 if (if_name == "dcache_port") 63 return &dcachePort; 64 else if (if_name == "icache_port") 65 return &icachePort; 66 else 67 panic("No Such Port\n"); 68} 69 70void 71AtomicSimpleCPU::init() 72{ 73 //Create Memory Ports (conect them up) 74// Port *mem_dport = mem->getPort(""); 75// dcachePort.setPeer(mem_dport); 76// mem_dport->setPeer(&dcachePort); 77 78// Port *mem_iport = mem->getPort(""); 79// icachePort.setPeer(mem_iport); 80// mem_iport->setPeer(&icachePort); 81 82 BaseCPU::init(); 83#if FULL_SYSTEM 84 for (int i = 0; i < threadContexts.size(); ++i) { 85 ThreadContext *tc = threadContexts[i]; 86 87 // initialize CPU, including PC 88 TheISA::initCPU(tc, tc->readCpuId()); 89 } 90#endif 91} 92 93bool 94AtomicSimpleCPU::CpuPort::recvTiming(Packet *pkt) 95{ 96 panic("AtomicSimpleCPU doesn't expect recvAtomic callback!"); 97 return true; 98} 99 100Tick 101AtomicSimpleCPU::CpuPort::recvAtomic(Packet *pkt) 102{ 103 panic("AtomicSimpleCPU doesn't expect recvAtomic callback!"); 104 return curTick; 105} 106 107void 108AtomicSimpleCPU::CpuPort::recvFunctional(Packet *pkt) 109{ 110 panic("AtomicSimpleCPU doesn't expect recvFunctional callback!"); 111} 112 113void 114AtomicSimpleCPU::CpuPort::recvStatusChange(Status status) 115{ 116 if (status == RangeChange) 117 return; 118 119 panic("AtomicSimpleCPU doesn't expect recvStatusChange callback!"); 120} 121 122void 123AtomicSimpleCPU::CpuPort::recvRetry() 124{ 125 panic("AtomicSimpleCPU doesn't expect recvRetry callback!"); 126} 127 128 129AtomicSimpleCPU::AtomicSimpleCPU(Params *p) 130 : BaseSimpleCPU(p), tickEvent(this), 131 width(p->width), simulate_stalls(p->simulate_stalls), 132 icachePort(name() + "-iport", this), dcachePort(name() + "-iport", this) 133{ 134 _status = Idle; 135 136 // @todo fix me and get the real cpu id & thread number!!! 137 ifetch_req = new Request(); 138 ifetch_req->setThreadContext(0,0); //Need CPU/Thread IDS HERE 139 ifetch_pkt = new Packet(ifetch_req, Packet::ReadReq, Packet::Broadcast); 140 ifetch_pkt->dataStatic(&inst); 141 142 data_read_req = new Request(); 143 data_read_req->setThreadContext(0,0); //Need CPU/Thread IDS HERE 144 data_read_pkt = new Packet(data_read_req, Packet::ReadReq, 145 Packet::Broadcast); 146 data_read_pkt->dataStatic(&dataReg); 147 148 data_write_req = new Request(); 149 data_write_req->setThreadContext(0,0); //Need CPU/Thread IDS HERE 150 data_write_pkt = new Packet(data_write_req, Packet::WriteReq, 151 Packet::Broadcast); 152} 153 154 155AtomicSimpleCPU::~AtomicSimpleCPU() 156{ 157} 158 159void 160AtomicSimpleCPU::serialize(ostream &os) 161{ 162 SimObject::State so_state = SimObject::getState(); 163 SERIALIZE_ENUM(so_state); 164 BaseSimpleCPU::serialize(os); 165 nameOut(os, csprintf("%s.tickEvent", name())); 166 tickEvent.serialize(os); 167} 168 169void 170AtomicSimpleCPU::unserialize(Checkpoint *cp, const string §ion) 171{ 172 SimObject::State so_state; 173 UNSERIALIZE_ENUM(so_state); 174 BaseSimpleCPU::unserialize(cp, section); 175 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section)); 176} 177 178void 179AtomicSimpleCPU::resume() 180{ 181 assert(system->getMemoryMode() == System::Atomic); 182 changeState(SimObject::Running); 183 if (thread->status() == ThreadContext::Active) { 184 if (!tickEvent.scheduled()) 185 tickEvent.schedule(curTick); 186 } 187} 188 189void 190AtomicSimpleCPU::switchOut() 191{ 192 assert(status() == Running || status() == Idle); 193 _status = SwitchedOut; 194 195 tickEvent.squash(); 196} 197 198 199void 200AtomicSimpleCPU::takeOverFrom(BaseCPU *oldCPU) 201{ 202 BaseCPU::takeOverFrom(oldCPU); 203 204 assert(!tickEvent.scheduled()); 205 206 // if any of this CPU's ThreadContexts are active, mark the CPU as 207 // running and schedule its tick event. 208 for (int i = 0; i < threadContexts.size(); ++i) { 209 ThreadContext *tc = threadContexts[i]; 210 if (tc->status() == ThreadContext::Active && _status != Running) { 211 _status = Running; 212 tickEvent.schedule(curTick); 213 break; 214 } 215 } 216} 217 218 219void 220AtomicSimpleCPU::activateContext(int thread_num, int delay) 221{ 222 assert(thread_num == 0); 223 assert(thread); 224 225 assert(_status == Idle); 226 assert(!tickEvent.scheduled()); 227 228 notIdleFraction++; 229 tickEvent.schedule(curTick + cycles(delay)); 230 _status = Running; 231} 232 233 234void 235AtomicSimpleCPU::suspendContext(int thread_num) 236{ 237 assert(thread_num == 0); 238 assert(thread); 239 240 assert(_status == Running); 241 242 // tick event may not be scheduled if this gets called from inside 243 // an instruction's execution, e.g. "quiesce" 244 if (tickEvent.scheduled()) 245 tickEvent.deschedule(); 246 247 notIdleFraction--; 248 _status = Idle; 249} 250 251 252template <class T> 253Fault 254AtomicSimpleCPU::read(Addr addr, T &data, unsigned flags) 255{ 256 // use the CPU's statically allocated read request and packet objects 257 Request *req = data_read_req; 258 Packet *pkt = data_read_pkt; 259 260 req->setVirt(0, addr, sizeof(T), flags, thread->readPC()); 261 262 if (traceData) { 263 traceData->setAddr(addr); 264 } 265 266 // translate to physical address 267 Fault fault = thread->translateDataReadReq(req); 268 269 // Now do the access. 270 if (fault == NoFault) { 271 pkt->reinitFromRequest(); 272 273 dcache_latency = dcachePort.sendAtomic(pkt); 274 dcache_access = true; 275 276 assert(pkt->result == Packet::Success); 277 data = pkt->get<T>(); 278 } 279 280 // This will need a new way to tell if it has a dcache attached. 281 if (req->getFlags() & UNCACHEABLE) 282 recordEvent("Uncached Read"); 283 284 return fault; 285} 286 287#ifndef DOXYGEN_SHOULD_SKIP_THIS 288 289template 290Fault 291AtomicSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags); 292 293template 294Fault 295AtomicSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags); 296 297template 298Fault 299AtomicSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags); 300 301template 302Fault 303AtomicSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags); 304 305#endif //DOXYGEN_SHOULD_SKIP_THIS 306 307template<> 308Fault 309AtomicSimpleCPU::read(Addr addr, double &data, unsigned flags) 310{ 311 return read(addr, *(uint64_t*)&data, flags); 312} 313 314template<> 315Fault 316AtomicSimpleCPU::read(Addr addr, float &data, unsigned flags) 317{ 318 return read(addr, *(uint32_t*)&data, flags); 319} 320 321 322template<> 323Fault 324AtomicSimpleCPU::read(Addr addr, int32_t &data, unsigned flags) 325{ 326 return read(addr, (uint32_t&)data, flags); 327} 328 329 330template <class T> 331Fault 332AtomicSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res) 333{ 334 // use the CPU's statically allocated write request and packet objects 335 Request *req = data_write_req; 336 Packet *pkt = data_write_pkt; 337 338 req->setVirt(0, addr, sizeof(T), flags, thread->readPC()); 339 340 if (traceData) { 341 traceData->setAddr(addr); 342 } 343 344 // translate to physical address 345 Fault fault = thread->translateDataWriteReq(req); 346 347 // Now do the access. 348 if (fault == NoFault) { 349 data = htog(data); 350 pkt->reinitFromRequest(); 351 pkt->dataStatic(&data); 352 353 dcache_latency = dcachePort.sendAtomic(pkt); 354 dcache_access = true; 355 356 assert(pkt->result == Packet::Success); 357 358 if (res && req->getFlags() & LOCKED) { 359 *res = req->getScResult(); 360 } 361 } 362 363 // This will need a new way to tell if it's hooked up to a cache or not. 364 if (req->getFlags() & UNCACHEABLE) 365 recordEvent("Uncached Write"); 366 367 // If the write needs to have a fault on the access, consider calling 368 // changeStatus() and changing it to "bad addr write" or something. 369 return fault; 370} 371 372 373#ifndef DOXYGEN_SHOULD_SKIP_THIS 374template 375Fault 376AtomicSimpleCPU::write(uint64_t data, Addr addr, 377 unsigned flags, uint64_t *res); 378 379template 380Fault 381AtomicSimpleCPU::write(uint32_t data, Addr addr, 382 unsigned flags, uint64_t *res); 383 384template 385Fault 386AtomicSimpleCPU::write(uint16_t data, Addr addr, 387 unsigned flags, uint64_t *res); 388 389template 390Fault 391AtomicSimpleCPU::write(uint8_t data, Addr addr, 392 unsigned flags, uint64_t *res); 393 394#endif //DOXYGEN_SHOULD_SKIP_THIS 395 396template<> 397Fault 398AtomicSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res) 399{ 400 return write(*(uint64_t*)&data, addr, flags, res); 401} 402 403template<> 404Fault 405AtomicSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res) 406{ 407 return write(*(uint32_t*)&data, addr, flags, res); 408} 409 410 411template<> 412Fault 413AtomicSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res) 414{ 415 return write((uint32_t)data, addr, flags, res); 416} 417 418 419void 420AtomicSimpleCPU::tick() 421{ 422 Tick latency = cycles(1); // instruction takes one cycle by default 423 424 for (int i = 0; i < width; ++i) { 425 numCycles++; 426 427 checkForInterrupts(); 428 429 Fault fault = setupFetchRequest(ifetch_req); 430 431 if (fault == NoFault) { 432 ifetch_pkt->reinitFromRequest(); 433 434 Tick icache_latency = icachePort.sendAtomic(ifetch_pkt); 435 // ifetch_req is initialized to read the instruction directly 436 // into the CPU object's inst field. 437 438 dcache_access = false; // assume no dcache access 439 preExecute(); 440 fault = curStaticInst->execute(this, traceData); 441 postExecute(); 442 443 if (simulate_stalls) { 444 Tick icache_stall = icache_latency - cycles(1); 445 Tick dcache_stall = 446 dcache_access ? dcache_latency - cycles(1) : 0; 447 Tick stall_cycles = (icache_stall + dcache_stall) / cycles(1); 448 if (cycles(stall_cycles) < (icache_stall + dcache_stall)) 449 latency += cycles(stall_cycles+1); 450 else 451 latency += cycles(stall_cycles); 452 } 453 454 } 455 456 advancePC(fault); 457 } 458 459 if (_status != Idle) 460 tickEvent.schedule(curTick + latency); 461} 462 463 464//////////////////////////////////////////////////////////////////////// 465// 466// AtomicSimpleCPU Simulation Object 467// 468BEGIN_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU) 469 470 Param<Counter> max_insts_any_thread; 471 Param<Counter> max_insts_all_threads; 472 Param<Counter> max_loads_any_thread; 473 Param<Counter> max_loads_all_threads; 474 Param<Tick> progress_interval; 475 SimObjectParam<MemObject *> mem; 476 SimObjectParam<System *> system; 477 478#if FULL_SYSTEM 479 SimObjectParam<AlphaITB *> itb; 480 SimObjectParam<AlphaDTB *> dtb; 481 Param<int> cpu_id; 482 Param<Tick> profile; 483#else 484 SimObjectParam<Process *> workload; 485#endif // FULL_SYSTEM 486 487 Param<int> clock; 488 489 Param<bool> defer_registration; 490 Param<int> width; 491 Param<bool> function_trace; 492 Param<Tick> function_trace_start; 493 Param<bool> simulate_stalls; 494 495END_DECLARE_SIM_OBJECT_PARAMS(AtomicSimpleCPU) 496 497BEGIN_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU) 498 499 INIT_PARAM(max_insts_any_thread, 500 "terminate when any thread reaches this inst count"), 501 INIT_PARAM(max_insts_all_threads, 502 "terminate when all threads have reached this inst count"), 503 INIT_PARAM(max_loads_any_thread, 504 "terminate when any thread reaches this load count"), 505 INIT_PARAM(max_loads_all_threads, 506 "terminate when all threads have reached this load count"), 507 INIT_PARAM(progress_interval, "Progress interval"), 508 INIT_PARAM(mem, "memory"), 509 INIT_PARAM(system, "system object"), 510 511#if FULL_SYSTEM 512 INIT_PARAM(itb, "Instruction TLB"), 513 INIT_PARAM(dtb, "Data TLB"), 514 INIT_PARAM(cpu_id, "processor ID"), 515 INIT_PARAM(profile, ""), 516#else 517 INIT_PARAM(workload, "processes to run"), 518#endif // FULL_SYSTEM 519 520 INIT_PARAM(clock, "clock speed"), 521 INIT_PARAM(defer_registration, "defer system registration (for sampling)"), 522 INIT_PARAM(width, "cpu width"), 523 INIT_PARAM(function_trace, "Enable function trace"), 524 INIT_PARAM(function_trace_start, "Cycle to start function trace"), 525 INIT_PARAM(simulate_stalls, "Simulate cache stall cycles") 526 527END_INIT_SIM_OBJECT_PARAMS(AtomicSimpleCPU) 528 529 530CREATE_SIM_OBJECT(AtomicSimpleCPU) 531{ 532 AtomicSimpleCPU::Params *params = new AtomicSimpleCPU::Params(); 533 params->name = getInstanceName(); 534 params->numberOfThreads = 1; 535 params->max_insts_any_thread = max_insts_any_thread; 536 params->max_insts_all_threads = max_insts_all_threads; 537 params->max_loads_any_thread = max_loads_any_thread; 538 params->max_loads_all_threads = max_loads_all_threads; 539 params->progress_interval = progress_interval; 540 params->deferRegistration = defer_registration; 541 params->clock = clock; 542 params->functionTrace = function_trace; 543 params->functionTraceStart = function_trace_start; 544 params->width = width; 545 params->simulate_stalls = simulate_stalls; 546 params->mem = mem; 547 params->system = system; 548 549#if FULL_SYSTEM 550 params->itb = itb; 551 params->dtb = dtb; 552 params->cpu_id = cpu_id; 553 params->profile = profile; 554#else 555 params->process = workload; 556#endif 557 558 AtomicSimpleCPU *cpu = new AtomicSimpleCPU(params); 559 return cpu; 560} 561 562REGISTER_SIM_OBJECT("AtomicSimpleCPU", AtomicSimpleCPU) 563 564