1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2009 Advanced Micro Devices, Inc. 15 * Copyright (c) 2011 Mark D. Hill and David A. Wood 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42#include "cpu/testers/rubytest/RubyTester.hh" 43#include "debug/Config.hh" 44#include "debug/Drain.hh" 45#include "debug/Ruby.hh" 46#include "mem/protocol/AccessPermission.hh" 47#include "mem/ruby/slicc_interface/AbstractController.hh" 48#include "mem/ruby/system/RubyPort.hh" 49#include "sim/system.hh" 50 51RubyPort::RubyPort(const Params *p) 52 : MemObject(p), m_version(p->version), m_controller(NULL), 53 m_mandatory_q_ptr(NULL), 54 pio_port(csprintf("%s-pio-port", name()), this), 55 m_usingRubyTester(p->using_ruby_tester), m_request_cnt(0), 56 drainManager(NULL), ruby_system(p->ruby_system), system(p->system), 57 waitingOnSequencer(false), access_phys_mem(p->access_phys_mem) 58{ 59 assert(m_version != -1); 60 61 // create the slave ports based on the number of connected ports 62 for (size_t i = 0; i < p->port_slave_connection_count; ++i) { 63 slave_ports.push_back(new M5Port(csprintf("%s-slave%d", name(), i), 64 this, ruby_system, access_phys_mem)); 65 } 66 67 // create the master ports based on the number of connected ports 68 for (size_t i = 0; i < p->port_master_connection_count; ++i) { 69 master_ports.push_back(new PioPort(csprintf("%s-master%d", name(), i), 70 this)); 71 } 72} 73 74void 75RubyPort::init() 76{ 77 assert(m_controller != NULL); 78 m_mandatory_q_ptr = m_controller->getMandatoryQueue();
| 1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2009 Advanced Micro Devices, Inc. 15 * Copyright (c) 2011 Mark D. Hill and David A. Wood 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42#include "cpu/testers/rubytest/RubyTester.hh" 43#include "debug/Config.hh" 44#include "debug/Drain.hh" 45#include "debug/Ruby.hh" 46#include "mem/protocol/AccessPermission.hh" 47#include "mem/ruby/slicc_interface/AbstractController.hh" 48#include "mem/ruby/system/RubyPort.hh" 49#include "sim/system.hh" 50 51RubyPort::RubyPort(const Params *p) 52 : MemObject(p), m_version(p->version), m_controller(NULL), 53 m_mandatory_q_ptr(NULL), 54 pio_port(csprintf("%s-pio-port", name()), this), 55 m_usingRubyTester(p->using_ruby_tester), m_request_cnt(0), 56 drainManager(NULL), ruby_system(p->ruby_system), system(p->system), 57 waitingOnSequencer(false), access_phys_mem(p->access_phys_mem) 58{ 59 assert(m_version != -1); 60 61 // create the slave ports based on the number of connected ports 62 for (size_t i = 0; i < p->port_slave_connection_count; ++i) { 63 slave_ports.push_back(new M5Port(csprintf("%s-slave%d", name(), i), 64 this, ruby_system, access_phys_mem)); 65 } 66 67 // create the master ports based on the number of connected ports 68 for (size_t i = 0; i < p->port_master_connection_count; ++i) { 69 master_ports.push_back(new PioPort(csprintf("%s-master%d", name(), i), 70 this)); 71 } 72} 73 74void 75RubyPort::init() 76{ 77 assert(m_controller != NULL); 78 m_mandatory_q_ptr = m_controller->getMandatoryQueue();
|
79} 80 81BaseMasterPort & 82RubyPort::getMasterPort(const std::string &if_name, PortID idx) 83{ 84 if (if_name == "pio_port") { 85 return pio_port; 86 } 87 88 // used by the x86 CPUs to connect the interrupt PIO and interrupt slave 89 // port 90 if (if_name != "master") { 91 // pass it along to our super class 92 return MemObject::getMasterPort(if_name, idx); 93 } else { 94 if (idx >= static_cast<PortID>(master_ports.size())) { 95 panic("RubyPort::getMasterPort: unknown index %d\n", idx); 96 } 97 98 return *master_ports[idx]; 99 } 100} 101 102BaseSlavePort & 103RubyPort::getSlavePort(const std::string &if_name, PortID idx) 104{ 105 // used by the CPUs to connect the caches to the interconnect, and 106 // for the x86 case also the interrupt master 107 if (if_name != "slave") { 108 // pass it along to our super class 109 return MemObject::getSlavePort(if_name, idx); 110 } else { 111 if (idx >= static_cast<PortID>(slave_ports.size())) { 112 panic("RubyPort::getSlavePort: unknown index %d\n", idx); 113 } 114 115 return *slave_ports[idx]; 116 } 117} 118 119RubyPort::PioPort::PioPort(const std::string &_name, 120 RubyPort *_port) 121 : QueuedMasterPort(_name, _port, queue), queue(*_port, *this), 122 ruby_port(_port) 123{ 124 DPRINTF(RubyPort, "creating master port on ruby sequencer %s\n", _name); 125} 126 127RubyPort::M5Port::M5Port(const std::string &_name, RubyPort *_port, 128 RubySystem *_system, bool _access_phys_mem) 129 : QueuedSlavePort(_name, _port, queue), queue(*_port, *this), 130 ruby_port(_port), ruby_system(_system), 131 _onRetryList(false), access_phys_mem(_access_phys_mem) 132{ 133 DPRINTF(RubyPort, "creating slave port on ruby sequencer %s\n", _name); 134} 135 136Tick 137RubyPort::M5Port::recvAtomic(PacketPtr pkt) 138{ 139 panic("RubyPort::M5Port::recvAtomic() not implemented!\n"); 140 return 0; 141} 142 143 144bool 145RubyPort::PioPort::recvTimingResp(PacketPtr pkt) 146{ 147 // In FS mode, ruby memory will receive pio responses from devices 148 // and it must forward these responses back to the particular CPU. 149 DPRINTF(RubyPort, "Pio response for address %#x\n", pkt->getAddr()); 150 151 // First we must retrieve the request port from the sender State 152 RubyPort::SenderState *senderState = 153 safe_cast<RubyPort::SenderState *>(pkt->senderState); 154 M5Port *port = senderState->port; 155 assert(port != NULL); 156 157 // pop the sender state from the packet 158 pkt->senderState = senderState->saved; 159 delete senderState; 160 161 port->sendTimingResp(pkt); 162 163 return true; 164} 165 166bool 167RubyPort::M5Port::recvTimingReq(PacketPtr pkt) 168{ 169 DPRINTF(RubyPort, 170 "Timing access caught for address %#x\n", pkt->getAddr()); 171 172 //dsm: based on SimpleTimingPort::recvTimingReq(pkt); 173 174 // The received packets should only be M5 requests, which should never 175 // get nacked. There used to be code to hanldle nacks here, but 176 // I'm pretty sure it didn't work correctly with the drain code, 177 // so that would need to be fixed if we ever added it back. 178 179 if (pkt->memInhibitAsserted()) { 180 warn("memInhibitAsserted???"); 181 // snooper will supply based on copy of packet 182 // still target's responsibility to delete packet 183 delete pkt; 184 return true; 185 } 186 187 // Save the port in the sender state object to be used later to 188 // route the response 189 pkt->senderState = new SenderState(this, pkt->senderState); 190 191 // Check for pio requests and directly send them to the dedicated 192 // pio port. 193 if (!isPhysMemAddress(pkt->getAddr())) { 194 assert(ruby_port->pio_port.isConnected()); 195 DPRINTF(RubyPort, 196 "Request for address 0x%#x is assumed to be a pio request\n", 197 pkt->getAddr()); 198 199 // send next cycle 200 ruby_port->pio_port.schedTimingReq(pkt, 201 curTick() + g_system_ptr->clockPeriod()); 202 return true; 203 } 204 205 assert(Address(pkt->getAddr()).getOffset() + pkt->getSize() <= 206 RubySystem::getBlockSizeBytes()); 207 208 // Submit the ruby request 209 RequestStatus requestStatus = ruby_port->makeRequest(pkt); 210 211 // If the request successfully issued then we should return true. 212 // Otherwise, we need to delete the senderStatus we just created and return 213 // false. 214 if (requestStatus == RequestStatus_Issued) { 215 DPRINTF(RubyPort, "Request %#x issued\n", pkt->getAddr()); 216 return true; 217 } 218 219 // 220 // Unless one is using the ruby tester, record the stalled M5 port for 221 // later retry when the sequencer becomes free. 222 // 223 if (!ruby_port->m_usingRubyTester) { 224 ruby_port->addToRetryList(this); 225 } 226 227 DPRINTF(RubyPort, 228 "Request for address %#x did not issue because %s\n", 229 pkt->getAddr(), RequestStatus_to_string(requestStatus)); 230 231 SenderState* senderState = safe_cast<SenderState*>(pkt->senderState); 232 pkt->senderState = senderState->saved; 233 delete senderState; 234 return false; 235} 236 237void 238RubyPort::M5Port::recvFunctional(PacketPtr pkt) 239{ 240 DPRINTF(RubyPort, "Functional access caught for address %#x\n", 241 pkt->getAddr()); 242 243 // Check for pio requests and directly send them to the dedicated 244 // pio port. 245 if (!isPhysMemAddress(pkt->getAddr())) { 246 assert(ruby_port->pio_port.isConnected()); 247 DPRINTF(RubyPort, "Request for address 0x%#x is a pio request\n", 248 pkt->getAddr()); 249 panic("RubyPort::PioPort::recvFunctional() not implemented!\n"); 250 } 251 252 assert(pkt->getAddr() + pkt->getSize() <= 253 line_address(Address(pkt->getAddr())).getAddress() + 254 RubySystem::getBlockSizeBytes()); 255 256 bool accessSucceeded = false; 257 bool needsResponse = pkt->needsResponse(); 258 259 // Do the functional access on ruby memory 260 if (pkt->isRead()) { 261 accessSucceeded = ruby_system->functionalRead(pkt); 262 } else if (pkt->isWrite()) { 263 accessSucceeded = ruby_system->functionalWrite(pkt); 264 } else { 265 panic("RubyPort: unsupported functional command %s\n", 266 pkt->cmdString()); 267 } 268 269 // Unless the requester explicitly said otherwise, generate an error if 270 // the functional request failed 271 if (!accessSucceeded && !pkt->suppressFuncError()) { 272 fatal("Ruby functional %s failed for address %#x\n", 273 pkt->isWrite() ? "write" : "read", pkt->getAddr()); 274 } 275 276 if (access_phys_mem) { 277 // The attached physmem contains the official version of data. 278 // The following command performs the real functional access. 279 // This line should be removed once Ruby supplies the official version 280 // of data. 281 ruby_port->system->getPhysMem().functionalAccess(pkt); 282 } 283 284 // turn packet around to go back to requester if response expected 285 if (needsResponse) { 286 pkt->setFunctionalResponseStatus(accessSucceeded); 287 288 // @todo There should not be a reverse call since the response is 289 // communicated through the packet pointer 290 // DPRINTF(RubyPort, "Sending packet back over port\n"); 291 // sendFunctional(pkt); 292 } 293 DPRINTF(RubyPort, "Functional access %s!\n", 294 accessSucceeded ? "successful":"failed"); 295} 296 297void 298RubyPort::ruby_hit_callback(PacketPtr pkt) 299{ 300 // Retrieve the request port from the sender State 301 RubyPort::SenderState *senderState = 302 safe_cast<RubyPort::SenderState *>(pkt->senderState); 303 M5Port *port = senderState->port; 304 assert(port != NULL); 305 306 // pop the sender state from the packet 307 pkt->senderState = senderState->saved; 308 delete senderState; 309 310 port->hitCallback(pkt); 311 312 // 313 // If we had to stall the M5Ports, wake them up because the sequencer 314 // likely has free resources now. 315 // 316 if (waitingOnSequencer) { 317 // 318 // Record the current list of ports to retry on a temporary list before 319 // calling sendRetry on those ports. sendRetry will cause an 320 // immediate retry, which may result in the ports being put back on the 321 // list. Therefore we want to clear the retryList before calling 322 // sendRetry. 323 // 324 std::list<M5Port*> curRetryList(retryList); 325 326 retryList.clear(); 327 waitingOnSequencer = false; 328 329 for (std::list<M5Port*>::iterator i = curRetryList.begin(); 330 i != curRetryList.end(); ++i) { 331 DPRINTF(RubyPort, 332 "Sequencer may now be free. SendRetry to port %s\n", 333 (*i)->name()); 334 (*i)->onRetryList(false); 335 (*i)->sendRetry(); 336 } 337 } 338 339 testDrainComplete(); 340} 341 342void 343RubyPort::testDrainComplete() 344{ 345 //If we weren't able to drain before, we might be able to now. 346 if (drainManager != NULL) { 347 unsigned int drainCount = outstandingCount(); 348 DPRINTF(Drain, "Drain count: %u\n", drainCount); 349 if (drainCount == 0) { 350 DPRINTF(Drain, "RubyPort done draining, signaling drain done\n"); 351 drainManager->signalDrainDone(); 352 // Clear the drain manager once we're done with it. 353 drainManager = NULL; 354 } 355 } 356} 357 358unsigned int 359RubyPort::getChildDrainCount(DrainManager *dm) 360{ 361 int count = 0; 362 363 if (pio_port.isConnected()) { 364 count += pio_port.drain(dm); 365 DPRINTF(Config, "count after pio check %d\n", count); 366 } 367 368 for (CpuPortIter p = slave_ports.begin(); p != slave_ports.end(); ++p) { 369 count += (*p)->drain(dm); 370 DPRINTF(Config, "count after slave port check %d\n", count); 371 } 372 373 for (std::vector<PioPort*>::iterator p = master_ports.begin(); 374 p != master_ports.end(); ++p) { 375 count += (*p)->drain(dm); 376 DPRINTF(Config, "count after master port check %d\n", count); 377 } 378 379 DPRINTF(Config, "final count %d\n", count); 380 381 return count; 382} 383 384unsigned int 385RubyPort::drain(DrainManager *dm) 386{ 387 if (isDeadlockEventScheduled()) { 388 descheduleDeadlockEvent(); 389 } 390 391 // 392 // If the RubyPort is not empty, then it needs to clear all outstanding 393 // requests before it should call drainManager->signalDrainDone() 394 // 395 DPRINTF(Config, "outstanding count %d\n", outstandingCount()); 396 bool need_drain = outstandingCount() > 0; 397 398 // 399 // Also, get the number of child ports that will also need to clear 400 // their buffered requests before they call drainManager->signalDrainDone() 401 // 402 unsigned int child_drain_count = getChildDrainCount(dm); 403 404 // Set status 405 if (need_drain) { 406 drainManager = dm; 407 408 DPRINTF(Drain, "RubyPort not drained\n"); 409 setDrainState(Drainable::Draining); 410 return child_drain_count + 1; 411 } 412 413 drainManager = NULL; 414 setDrainState(Drainable::Drained); 415 return child_drain_count; 416} 417 418void 419RubyPort::M5Port::hitCallback(PacketPtr pkt) 420{ 421 bool needsResponse = pkt->needsResponse(); 422 423 // 424 // Unless specified at configuraiton, all responses except failed SC 425 // and Flush operations access M5 physical memory. 426 // 427 bool accessPhysMem = access_phys_mem; 428 429 if (pkt->isLLSC()) { 430 if (pkt->isWrite()) { 431 if (pkt->req->getExtraData() != 0) { 432 // 433 // Successful SC packets convert to normal writes 434 // 435 pkt->convertScToWrite(); 436 } else { 437 // 438 // Failed SC packets don't access physical memory and thus 439 // the RubyPort itself must convert it to a response. 440 // 441 accessPhysMem = false; 442 } 443 } else { 444 // 445 // All LL packets convert to normal loads so that M5 PhysMem does 446 // not lock the blocks. 447 // 448 pkt->convertLlToRead(); 449 } 450 } 451 452 // 453 // Flush requests don't access physical memory 454 // 455 if (pkt->isFlush()) { 456 accessPhysMem = false; 457 } 458 459 DPRINTF(RubyPort, "Hit callback needs response %d\n", needsResponse); 460 461 if (accessPhysMem) { 462 ruby_port->system->getPhysMem().access(pkt); 463 } else if (needsResponse) { 464 pkt->makeResponse(); 465 } 466 467 // turn packet around to go back to requester if response expected 468 if (needsResponse) { 469 DPRINTF(RubyPort, "Sending packet back over port\n"); 470 // send next cycle 471 schedTimingResp(pkt, curTick() + g_system_ptr->clockPeriod()); 472 } else { 473 delete pkt; 474 } 475 DPRINTF(RubyPort, "Hit callback done!\n"); 476} 477 478AddrRangeList 479RubyPort::M5Port::getAddrRanges() const 480{ 481 // at the moment the assumption is that the master does not care 482 AddrRangeList ranges; 483 return ranges; 484} 485 486bool 487RubyPort::M5Port::isPhysMemAddress(Addr addr) 488{ 489 return ruby_port->system->isMemAddr(addr); 490} 491 492unsigned 493RubyPort::M5Port::deviceBlockSize() const 494{ 495 return (unsigned) RubySystem::getBlockSizeBytes(); 496} 497 498void 499RubyPort::ruby_eviction_callback(const Address& address) 500{ 501 DPRINTF(RubyPort, "Sending invalidations.\n"); 502 // should this really be using funcMasterId? 503 Request req(address.getAddress(), 0, 0, Request::funcMasterId); 504 for (CpuPortIter p = slave_ports.begin(); p != slave_ports.end(); ++p) { 505 // check if the connected master port is snooping 506 if ((*p)->isSnooping()) { 507 Packet *pkt = new Packet(&req, MemCmd::InvalidationReq); 508 // send as a snoop request 509 (*p)->sendTimingSnoopReq(pkt); 510 } 511 } 512}
| 80} 81 82BaseMasterPort & 83RubyPort::getMasterPort(const std::string &if_name, PortID idx) 84{ 85 if (if_name == "pio_port") { 86 return pio_port; 87 } 88 89 // used by the x86 CPUs to connect the interrupt PIO and interrupt slave 90 // port 91 if (if_name != "master") { 92 // pass it along to our super class 93 return MemObject::getMasterPort(if_name, idx); 94 } else { 95 if (idx >= static_cast<PortID>(master_ports.size())) { 96 panic("RubyPort::getMasterPort: unknown index %d\n", idx); 97 } 98 99 return *master_ports[idx]; 100 } 101} 102 103BaseSlavePort & 104RubyPort::getSlavePort(const std::string &if_name, PortID idx) 105{ 106 // used by the CPUs to connect the caches to the interconnect, and 107 // for the x86 case also the interrupt master 108 if (if_name != "slave") { 109 // pass it along to our super class 110 return MemObject::getSlavePort(if_name, idx); 111 } else { 112 if (idx >= static_cast<PortID>(slave_ports.size())) { 113 panic("RubyPort::getSlavePort: unknown index %d\n", idx); 114 } 115 116 return *slave_ports[idx]; 117 } 118} 119 120RubyPort::PioPort::PioPort(const std::string &_name, 121 RubyPort *_port) 122 : QueuedMasterPort(_name, _port, queue), queue(*_port, *this), 123 ruby_port(_port) 124{ 125 DPRINTF(RubyPort, "creating master port on ruby sequencer %s\n", _name); 126} 127 128RubyPort::M5Port::M5Port(const std::string &_name, RubyPort *_port, 129 RubySystem *_system, bool _access_phys_mem) 130 : QueuedSlavePort(_name, _port, queue), queue(*_port, *this), 131 ruby_port(_port), ruby_system(_system), 132 _onRetryList(false), access_phys_mem(_access_phys_mem) 133{ 134 DPRINTF(RubyPort, "creating slave port on ruby sequencer %s\n", _name); 135} 136 137Tick 138RubyPort::M5Port::recvAtomic(PacketPtr pkt) 139{ 140 panic("RubyPort::M5Port::recvAtomic() not implemented!\n"); 141 return 0; 142} 143 144 145bool 146RubyPort::PioPort::recvTimingResp(PacketPtr pkt) 147{ 148 // In FS mode, ruby memory will receive pio responses from devices 149 // and it must forward these responses back to the particular CPU. 150 DPRINTF(RubyPort, "Pio response for address %#x\n", pkt->getAddr()); 151 152 // First we must retrieve the request port from the sender State 153 RubyPort::SenderState *senderState = 154 safe_cast<RubyPort::SenderState *>(pkt->senderState); 155 M5Port *port = senderState->port; 156 assert(port != NULL); 157 158 // pop the sender state from the packet 159 pkt->senderState = senderState->saved; 160 delete senderState; 161 162 port->sendTimingResp(pkt); 163 164 return true; 165} 166 167bool 168RubyPort::M5Port::recvTimingReq(PacketPtr pkt) 169{ 170 DPRINTF(RubyPort, 171 "Timing access caught for address %#x\n", pkt->getAddr()); 172 173 //dsm: based on SimpleTimingPort::recvTimingReq(pkt); 174 175 // The received packets should only be M5 requests, which should never 176 // get nacked. There used to be code to hanldle nacks here, but 177 // I'm pretty sure it didn't work correctly with the drain code, 178 // so that would need to be fixed if we ever added it back. 179 180 if (pkt->memInhibitAsserted()) { 181 warn("memInhibitAsserted???"); 182 // snooper will supply based on copy of packet 183 // still target's responsibility to delete packet 184 delete pkt; 185 return true; 186 } 187 188 // Save the port in the sender state object to be used later to 189 // route the response 190 pkt->senderState = new SenderState(this, pkt->senderState); 191 192 // Check for pio requests and directly send them to the dedicated 193 // pio port. 194 if (!isPhysMemAddress(pkt->getAddr())) { 195 assert(ruby_port->pio_port.isConnected()); 196 DPRINTF(RubyPort, 197 "Request for address 0x%#x is assumed to be a pio request\n", 198 pkt->getAddr()); 199 200 // send next cycle 201 ruby_port->pio_port.schedTimingReq(pkt, 202 curTick() + g_system_ptr->clockPeriod()); 203 return true; 204 } 205 206 assert(Address(pkt->getAddr()).getOffset() + pkt->getSize() <= 207 RubySystem::getBlockSizeBytes()); 208 209 // Submit the ruby request 210 RequestStatus requestStatus = ruby_port->makeRequest(pkt); 211 212 // If the request successfully issued then we should return true. 213 // Otherwise, we need to delete the senderStatus we just created and return 214 // false. 215 if (requestStatus == RequestStatus_Issued) { 216 DPRINTF(RubyPort, "Request %#x issued\n", pkt->getAddr()); 217 return true; 218 } 219 220 // 221 // Unless one is using the ruby tester, record the stalled M5 port for 222 // later retry when the sequencer becomes free. 223 // 224 if (!ruby_port->m_usingRubyTester) { 225 ruby_port->addToRetryList(this); 226 } 227 228 DPRINTF(RubyPort, 229 "Request for address %#x did not issue because %s\n", 230 pkt->getAddr(), RequestStatus_to_string(requestStatus)); 231 232 SenderState* senderState = safe_cast<SenderState*>(pkt->senderState); 233 pkt->senderState = senderState->saved; 234 delete senderState; 235 return false; 236} 237 238void 239RubyPort::M5Port::recvFunctional(PacketPtr pkt) 240{ 241 DPRINTF(RubyPort, "Functional access caught for address %#x\n", 242 pkt->getAddr()); 243 244 // Check for pio requests and directly send them to the dedicated 245 // pio port. 246 if (!isPhysMemAddress(pkt->getAddr())) { 247 assert(ruby_port->pio_port.isConnected()); 248 DPRINTF(RubyPort, "Request for address 0x%#x is a pio request\n", 249 pkt->getAddr()); 250 panic("RubyPort::PioPort::recvFunctional() not implemented!\n"); 251 } 252 253 assert(pkt->getAddr() + pkt->getSize() <= 254 line_address(Address(pkt->getAddr())).getAddress() + 255 RubySystem::getBlockSizeBytes()); 256 257 bool accessSucceeded = false; 258 bool needsResponse = pkt->needsResponse(); 259 260 // Do the functional access on ruby memory 261 if (pkt->isRead()) { 262 accessSucceeded = ruby_system->functionalRead(pkt); 263 } else if (pkt->isWrite()) { 264 accessSucceeded = ruby_system->functionalWrite(pkt); 265 } else { 266 panic("RubyPort: unsupported functional command %s\n", 267 pkt->cmdString()); 268 } 269 270 // Unless the requester explicitly said otherwise, generate an error if 271 // the functional request failed 272 if (!accessSucceeded && !pkt->suppressFuncError()) { 273 fatal("Ruby functional %s failed for address %#x\n", 274 pkt->isWrite() ? "write" : "read", pkt->getAddr()); 275 } 276 277 if (access_phys_mem) { 278 // The attached physmem contains the official version of data. 279 // The following command performs the real functional access. 280 // This line should be removed once Ruby supplies the official version 281 // of data. 282 ruby_port->system->getPhysMem().functionalAccess(pkt); 283 } 284 285 // turn packet around to go back to requester if response expected 286 if (needsResponse) { 287 pkt->setFunctionalResponseStatus(accessSucceeded); 288 289 // @todo There should not be a reverse call since the response is 290 // communicated through the packet pointer 291 // DPRINTF(RubyPort, "Sending packet back over port\n"); 292 // sendFunctional(pkt); 293 } 294 DPRINTF(RubyPort, "Functional access %s!\n", 295 accessSucceeded ? "successful":"failed"); 296} 297 298void 299RubyPort::ruby_hit_callback(PacketPtr pkt) 300{ 301 // Retrieve the request port from the sender State 302 RubyPort::SenderState *senderState = 303 safe_cast<RubyPort::SenderState *>(pkt->senderState); 304 M5Port *port = senderState->port; 305 assert(port != NULL); 306 307 // pop the sender state from the packet 308 pkt->senderState = senderState->saved; 309 delete senderState; 310 311 port->hitCallback(pkt); 312 313 // 314 // If we had to stall the M5Ports, wake them up because the sequencer 315 // likely has free resources now. 316 // 317 if (waitingOnSequencer) { 318 // 319 // Record the current list of ports to retry on a temporary list before 320 // calling sendRetry on those ports. sendRetry will cause an 321 // immediate retry, which may result in the ports being put back on the 322 // list. Therefore we want to clear the retryList before calling 323 // sendRetry. 324 // 325 std::list<M5Port*> curRetryList(retryList); 326 327 retryList.clear(); 328 waitingOnSequencer = false; 329 330 for (std::list<M5Port*>::iterator i = curRetryList.begin(); 331 i != curRetryList.end(); ++i) { 332 DPRINTF(RubyPort, 333 "Sequencer may now be free. SendRetry to port %s\n", 334 (*i)->name()); 335 (*i)->onRetryList(false); 336 (*i)->sendRetry(); 337 } 338 } 339 340 testDrainComplete(); 341} 342 343void 344RubyPort::testDrainComplete() 345{ 346 //If we weren't able to drain before, we might be able to now. 347 if (drainManager != NULL) { 348 unsigned int drainCount = outstandingCount(); 349 DPRINTF(Drain, "Drain count: %u\n", drainCount); 350 if (drainCount == 0) { 351 DPRINTF(Drain, "RubyPort done draining, signaling drain done\n"); 352 drainManager->signalDrainDone(); 353 // Clear the drain manager once we're done with it. 354 drainManager = NULL; 355 } 356 } 357} 358 359unsigned int 360RubyPort::getChildDrainCount(DrainManager *dm) 361{ 362 int count = 0; 363 364 if (pio_port.isConnected()) { 365 count += pio_port.drain(dm); 366 DPRINTF(Config, "count after pio check %d\n", count); 367 } 368 369 for (CpuPortIter p = slave_ports.begin(); p != slave_ports.end(); ++p) { 370 count += (*p)->drain(dm); 371 DPRINTF(Config, "count after slave port check %d\n", count); 372 } 373 374 for (std::vector<PioPort*>::iterator p = master_ports.begin(); 375 p != master_ports.end(); ++p) { 376 count += (*p)->drain(dm); 377 DPRINTF(Config, "count after master port check %d\n", count); 378 } 379 380 DPRINTF(Config, "final count %d\n", count); 381 382 return count; 383} 384 385unsigned int 386RubyPort::drain(DrainManager *dm) 387{ 388 if (isDeadlockEventScheduled()) { 389 descheduleDeadlockEvent(); 390 } 391 392 // 393 // If the RubyPort is not empty, then it needs to clear all outstanding 394 // requests before it should call drainManager->signalDrainDone() 395 // 396 DPRINTF(Config, "outstanding count %d\n", outstandingCount()); 397 bool need_drain = outstandingCount() > 0; 398 399 // 400 // Also, get the number of child ports that will also need to clear 401 // their buffered requests before they call drainManager->signalDrainDone() 402 // 403 unsigned int child_drain_count = getChildDrainCount(dm); 404 405 // Set status 406 if (need_drain) { 407 drainManager = dm; 408 409 DPRINTF(Drain, "RubyPort not drained\n"); 410 setDrainState(Drainable::Draining); 411 return child_drain_count + 1; 412 } 413 414 drainManager = NULL; 415 setDrainState(Drainable::Drained); 416 return child_drain_count; 417} 418 419void 420RubyPort::M5Port::hitCallback(PacketPtr pkt) 421{ 422 bool needsResponse = pkt->needsResponse(); 423 424 // 425 // Unless specified at configuraiton, all responses except failed SC 426 // and Flush operations access M5 physical memory. 427 // 428 bool accessPhysMem = access_phys_mem; 429 430 if (pkt->isLLSC()) { 431 if (pkt->isWrite()) { 432 if (pkt->req->getExtraData() != 0) { 433 // 434 // Successful SC packets convert to normal writes 435 // 436 pkt->convertScToWrite(); 437 } else { 438 // 439 // Failed SC packets don't access physical memory and thus 440 // the RubyPort itself must convert it to a response. 441 // 442 accessPhysMem = false; 443 } 444 } else { 445 // 446 // All LL packets convert to normal loads so that M5 PhysMem does 447 // not lock the blocks. 448 // 449 pkt->convertLlToRead(); 450 } 451 } 452 453 // 454 // Flush requests don't access physical memory 455 // 456 if (pkt->isFlush()) { 457 accessPhysMem = false; 458 } 459 460 DPRINTF(RubyPort, "Hit callback needs response %d\n", needsResponse); 461 462 if (accessPhysMem) { 463 ruby_port->system->getPhysMem().access(pkt); 464 } else if (needsResponse) { 465 pkt->makeResponse(); 466 } 467 468 // turn packet around to go back to requester if response expected 469 if (needsResponse) { 470 DPRINTF(RubyPort, "Sending packet back over port\n"); 471 // send next cycle 472 schedTimingResp(pkt, curTick() + g_system_ptr->clockPeriod()); 473 } else { 474 delete pkt; 475 } 476 DPRINTF(RubyPort, "Hit callback done!\n"); 477} 478 479AddrRangeList 480RubyPort::M5Port::getAddrRanges() const 481{ 482 // at the moment the assumption is that the master does not care 483 AddrRangeList ranges; 484 return ranges; 485} 486 487bool 488RubyPort::M5Port::isPhysMemAddress(Addr addr) 489{ 490 return ruby_port->system->isMemAddr(addr); 491} 492 493unsigned 494RubyPort::M5Port::deviceBlockSize() const 495{ 496 return (unsigned) RubySystem::getBlockSizeBytes(); 497} 498 499void 500RubyPort::ruby_eviction_callback(const Address& address) 501{ 502 DPRINTF(RubyPort, "Sending invalidations.\n"); 503 // should this really be using funcMasterId? 504 Request req(address.getAddress(), 0, 0, Request::funcMasterId); 505 for (CpuPortIter p = slave_ports.begin(); p != slave_ports.end(); ++p) { 506 // check if the connected master port is snooping 507 if ((*p)->isSnooping()) { 508 Packet *pkt = new Packet(&req, MemCmd::InvalidationReq); 509 // send as a snoop request 510 (*p)->sendTimingSnoopReq(pkt); 511 } 512 } 513}
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