1/* 2 * Copyright (c) 2011-2014 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) 2003-2006 The Regents of The University of Michigan 15 * Copyright (c) 2011 Regents of the University of California 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 * Authors: Steve Reinhardt 42 * Lisa Hsu 43 * Nathan Binkert 44 * Ali Saidi 45 * Rick Strong 46 */ 47 48#include "sim/system.hh" 49 50#include "arch/remote_gdb.hh" 51#include "arch/utility.hh" 52#include "base/loader/object_file.hh" 53#include "base/loader/symtab.hh" 54#include "base/str.hh" 55#include "base/trace.hh" 56#include "config/use_kvm.hh" 57#if USE_KVM 58#include "cpu/kvm/base.hh" 59#include "cpu/kvm/vm.hh" 60#endif 61#include "cpu/base.hh" 62#include "cpu/thread_context.hh" 63#include "debug/Loader.hh" 64#include "debug/WorkItems.hh" 65#include "mem/abstract_mem.hh" 66#include "mem/physical.hh" 67#include "params/System.hh" 68#include "sim/byteswap.hh" 69#include "sim/debug.hh" 70#include "sim/full_system.hh" 71 72/** 73 * To avoid linking errors with LTO, only include the header if we 74 * actually have a definition. 75 */ 76#if THE_ISA != NULL_ISA 77#include "kern/kernel_stats.hh" 78 79#endif 80 81using namespace std; 82using namespace TheISA; 83 84vector<System *> System::systemList; 85 86int System::numSystemsRunning = 0; 87 88System::System(Params *p) 89 : MemObject(p), _systemPort("system_port", this), 90 _numContexts(0), 91 multiThread(p->multi_thread), 92 pagePtr(0), 93 init_param(p->init_param), 94 physProxy(_systemPort, p->cache_line_size), 95 kernelSymtab(nullptr), 96 kernel(nullptr), 97 loadAddrMask(p->load_addr_mask), 98 loadAddrOffset(p->load_offset), 99#if USE_KVM 100 kvmVM(p->kvm_vm), 101#else 102 kvmVM(nullptr), 103#endif 104 physmem(name() + ".physmem", p->memories, p->mmap_using_noreserve), 105 memoryMode(p->mem_mode), 106 _cacheLineSize(p->cache_line_size), 107 workItemsBegin(0), 108 workItemsEnd(0), 109 numWorkIds(p->num_work_ids), 110 thermalModel(p->thermal_model), 111 _params(p), 112 totalNumInsts(0), 113 instEventQueue("system instruction-based event queue") 114{ 115 // add self to global system list 116 systemList.push_back(this); 117 118#if USE_KVM 119 if (kvmVM) { 120 kvmVM->setSystem(this); 121 } 122#endif 123 124 if (FullSystem) { 125 kernelSymtab = new SymbolTable; 126 if (!debugSymbolTable) 127 debugSymbolTable = new SymbolTable; 128 } 129 130 // check if the cache line size is a value known to work 131 if (!(_cacheLineSize == 16 || _cacheLineSize == 32 || 132 _cacheLineSize == 64 || _cacheLineSize == 128)) 133 warn_once("Cache line size is neither 16, 32, 64 nor 128 bytes.\n"); 134 135 // Get the generic system master IDs 136 MasterID tmp_id M5_VAR_USED; 137 tmp_id = getMasterId("writebacks"); 138 assert(tmp_id == Request::wbMasterId); 139 tmp_id = getMasterId("functional"); 140 assert(tmp_id == Request::funcMasterId); 141 tmp_id = getMasterId("interrupt"); 142 assert(tmp_id == Request::intMasterId); 143 144 if (FullSystem) { 145 if (params()->kernel == "") { 146 inform("No kernel set for full system simulation. " 147 "Assuming you know what you're doing\n"); 148 } else { 149 // Get the kernel code 150 kernel = createObjectFile(params()->kernel); 151 inform("kernel located at: %s", params()->kernel); 152 153 if (kernel == NULL) 154 fatal("Could not load kernel file %s", params()->kernel); 155 156 // setup entry points 157 kernelStart = kernel->textBase(); 158 kernelEnd = kernel->bssBase() + kernel->bssSize(); 159 kernelEntry = kernel->entryPoint(); 160 161 // load symbols 162 if (!kernel->loadGlobalSymbols(kernelSymtab)) 163 fatal("could not load kernel symbols\n"); 164 165 if (!kernel->loadLocalSymbols(kernelSymtab)) 166 fatal("could not load kernel local symbols\n"); 167 168 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 169 fatal("could not load kernel symbols\n"); 170 171 if (!kernel->loadLocalSymbols(debugSymbolTable)) 172 fatal("could not load kernel local symbols\n"); 173 174 // Loading only needs to happen once and after memory system is 175 // connected so it will happen in initState() 176 }
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177 178 for (const auto &obj_name : p->kernel_extras) { 179 inform("Loading additional kernel object: %s", obj_name); 180 ObjectFile *obj = createObjectFile(obj_name); 181 fatal_if(!obj, "Failed to additional kernel object '%s'.\n", 182 obj_name); 183 kernelExtras.push_back(obj); 184 } |
185 } 186 187 // increment the number of running systems 188 numSystemsRunning++; 189 190 // Set back pointers to the system in all memories 191 for (int x = 0; x < params()->memories.size(); x++) 192 params()->memories[x]->system(this); 193} 194 195System::~System() 196{ 197 delete kernelSymtab; 198 delete kernel; 199 200 for (uint32_t j = 0; j < numWorkIds; j++) 201 delete workItemStats[j]; 202} 203 204void 205System::init() 206{ 207 // check that the system port is connected 208 if (!_systemPort.isConnected()) 209 panic("System port on %s is not connected.\n", name()); 210} 211 212BaseMasterPort& 213System::getMasterPort(const std::string &if_name, PortID idx) 214{ 215 // no need to distinguish at the moment (besides checking) 216 return _systemPort; 217} 218 219void 220System::setMemoryMode(Enums::MemoryMode mode) 221{ 222 assert(drainState() == DrainState::Drained); 223 memoryMode = mode; 224} 225 226bool System::breakpoint() 227{ 228 if (remoteGDB.size()) 229 return remoteGDB[0]->breakpoint(); 230 return false; 231} 232 233ContextID 234System::registerThreadContext(ThreadContext *tc, ContextID assigned) 235{ 236 int id; 237 if (assigned == InvalidContextID) { 238 for (id = 0; id < threadContexts.size(); id++) { 239 if (!threadContexts[id]) 240 break; 241 } 242 243 if (threadContexts.size() <= id) 244 threadContexts.resize(id + 1); 245 } else { 246 if (threadContexts.size() <= assigned) 247 threadContexts.resize(assigned + 1); 248 id = assigned; 249 } 250 251 if (threadContexts[id]) 252 fatal("Cannot have two CPUs with the same id (%d)\n", id); 253 254 threadContexts[id] = tc; 255 _numContexts++; 256 257#if THE_ISA != NULL_ISA 258 int port = getRemoteGDBPort(); 259 if (port) { 260 RemoteGDB *rgdb = new RemoteGDB(this, tc); 261 GDBListener *gdbl = new GDBListener(rgdb, port + id); 262 gdbl->listen(); 263 264 BaseCPU *cpu = tc->getCpuPtr(); 265 if (cpu->waitForRemoteGDB()) { 266 inform("%s: Waiting for a remote GDB connection on port %d.\n", 267 cpu->name(), gdbl->getPort()); 268 269 gdbl->accept(); 270 } 271 if (remoteGDB.size() <= id) { 272 remoteGDB.resize(id + 1); 273 } 274 275 remoteGDB[id] = rgdb; 276 } 277#endif 278 279 activeCpus.push_back(false); 280 281 return id; 282} 283 284int 285System::numRunningContexts() 286{ 287 int running = 0; 288 for (int i = 0; i < _numContexts; ++i) { 289 if (threadContexts[i]->status() != ThreadContext::Halted) 290 ++running; 291 } 292 return running; 293} 294 295void 296System::initState() 297{ 298 if (FullSystem) { 299 for (int i = 0; i < threadContexts.size(); i++) 300 TheISA::startupCPU(threadContexts[i], i); 301 // Moved from the constructor to here since it relies on the 302 // address map being resolved in the interconnect 303 /** 304 * Load the kernel code into memory 305 */ 306 if (params()->kernel != "") { 307 if (params()->kernel_addr_check) { 308 // Validate kernel mapping before loading binary 309 if (!(isMemAddr((kernelStart & loadAddrMask) + 310 loadAddrOffset) && 311 isMemAddr((kernelEnd & loadAddrMask) + 312 loadAddrOffset))) { 313 fatal("Kernel is mapped to invalid location (not memory). " 314 "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n", 315 kernelStart, 316 kernelEnd, (kernelStart & loadAddrMask) + 317 loadAddrOffset, 318 (kernelEnd & loadAddrMask) + loadAddrOffset); 319 } 320 } 321 // Load program sections into memory 322 kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset);
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323 for (const auto &extra_kernel : kernelExtras) { 324 extra_kernel->loadSections(physProxy, loadAddrMask, 325 loadAddrOffset); 326 } |
327 328 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 329 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 330 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 331 DPRINTF(Loader, "Kernel loaded...\n"); 332 } 333 } 334} 335 336void 337System::replaceThreadContext(ThreadContext *tc, ContextID context_id) 338{ 339 if (context_id >= threadContexts.size()) { 340 panic("replaceThreadContext: bad id, %d >= %d\n", 341 context_id, threadContexts.size()); 342 } 343 344 threadContexts[context_id] = tc; 345 if (context_id < remoteGDB.size()) 346 remoteGDB[context_id]->replaceThreadContext(tc); 347} 348 349bool 350System::validKvmEnvironment() const 351{ 352#if USE_KVM 353 if (threadContexts.empty()) 354 return false; 355 356 for (auto tc : threadContexts) { 357 if (dynamic_cast<BaseKvmCPU*>(tc->getCpuPtr()) == nullptr) { 358 return false; 359 } 360 } 361 return true; 362#else 363 return false; 364#endif 365} 366 367Addr 368System::allocPhysPages(int npages) 369{ 370 Addr return_addr = pagePtr << PageShift; 371 pagePtr += npages; 372 373 Addr next_return_addr = pagePtr << PageShift; 374 375 AddrRange m5opRange(0xffff0000, 0xffffffff); 376 if (m5opRange.contains(next_return_addr)) { 377 warn("Reached m5ops MMIO region\n"); 378 return_addr = 0xffffffff; 379 pagePtr = 0xffffffff >> PageShift; 380 } 381 382 if ((pagePtr << PageShift) > physmem.totalSize()) 383 fatal("Out of memory, please increase size of physical memory."); 384 return return_addr; 385} 386 387Addr 388System::memSize() const 389{ 390 return physmem.totalSize(); 391} 392 393Addr 394System::freeMemSize() const 395{ 396 return physmem.totalSize() - (pagePtr << PageShift); 397} 398 399bool 400System::isMemAddr(Addr addr) const 401{ 402 return physmem.isMemAddr(addr); 403} 404 405void 406System::drainResume() 407{ 408 totalNumInsts = 0; 409} 410 411void 412System::serialize(CheckpointOut &cp) const 413{ 414 if (FullSystem) 415 kernelSymtab->serialize("kernel_symtab", cp); 416 SERIALIZE_SCALAR(pagePtr); 417 serializeSymtab(cp); 418 419 // also serialize the memories in the system 420 physmem.serializeSection(cp, "physmem"); 421} 422 423 424void 425System::unserialize(CheckpointIn &cp) 426{ 427 if (FullSystem) 428 kernelSymtab->unserialize("kernel_symtab", cp); 429 UNSERIALIZE_SCALAR(pagePtr); 430 unserializeSymtab(cp); 431 432 // also unserialize the memories in the system 433 physmem.unserializeSection(cp, "physmem"); 434} 435 436void 437System::regStats() 438{ 439 MemObject::regStats(); 440 441 for (uint32_t j = 0; j < numWorkIds ; j++) { 442 workItemStats[j] = new Stats::Histogram(); 443 stringstream namestr; 444 ccprintf(namestr, "work_item_type%d", j); 445 workItemStats[j]->init(20) 446 .name(name() + "." + namestr.str()) 447 .desc("Run time stat for" + namestr.str()) 448 .prereq(*workItemStats[j]); 449 } 450} 451 452void 453System::workItemEnd(uint32_t tid, uint32_t workid) 454{ 455 std::pair<uint32_t,uint32_t> p(tid, workid); 456 if (!lastWorkItemStarted.count(p)) 457 return; 458 459 Tick samp = curTick() - lastWorkItemStarted[p]; 460 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 461 462 if (workid >= numWorkIds) 463 fatal("Got workid greater than specified in system configuration\n"); 464 465 workItemStats[workid]->sample(samp); 466 lastWorkItemStarted.erase(p); 467} 468 469void 470System::printSystems() 471{ 472 ios::fmtflags flags(cerr.flags()); 473 474 vector<System *>::iterator i = systemList.begin(); 475 vector<System *>::iterator end = systemList.end(); 476 for (; i != end; ++i) { 477 System *sys = *i; 478 cerr << "System " << sys->name() << ": " << hex << sys << endl; 479 } 480 481 cerr.flags(flags); 482} 483 484void 485printSystems() 486{ 487 System::printSystems(); 488} 489 490MasterID 491System::getMasterId(std::string master_name) 492{ 493 // strip off system name if the string starts with it 494 if (startswith(master_name, name())) 495 master_name = master_name.erase(0, name().size() + 1); 496 497 // CPUs in switch_cpus ask for ids again after switching 498 for (int i = 0; i < masterIds.size(); i++) { 499 if (masterIds[i] == master_name) { 500 return i; 501 } 502 } 503 504 // Verify that the statistics haven't been enabled yet 505 // Otherwise objects will have sized their stat buckets and 506 // they will be too small 507 508 if (Stats::enabled()) { 509 fatal("Can't request a masterId after regStats(). " 510 "You must do so in init().\n"); 511 } 512 513 masterIds.push_back(master_name); 514 515 return masterIds.size() - 1; 516} 517 518std::string 519System::getMasterName(MasterID master_id) 520{ 521 if (master_id >= masterIds.size()) 522 fatal("Invalid master_id passed to getMasterName()\n"); 523 524 return masterIds[master_id]; 525} 526 527System * 528SystemParams::create() 529{ 530 return new System(this); 531}
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