1/* 2 * Copyright (c) 2011-2014,2017 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 // If load_addr_mask is set to 0x0, then auto-calculate 162 // the smallest mask to cover all kernel addresses so gem5 163 // can relocate the kernel to a new offset. 164 if (loadAddrMask == 0) { 165 Addr shift_amt = findMsbSet(kernelEnd - kernelStart) + 1; 166 loadAddrMask = ((Addr)1 << shift_amt) - 1; 167 } 168 169 // load symbols 170 if (!kernel->loadGlobalSymbols(kernelSymtab)) 171 fatal("could not load kernel symbols\n"); 172 173 if (!kernel->loadLocalSymbols(kernelSymtab)) 174 fatal("could not load kernel local symbols\n"); 175 176 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 177 fatal("could not load kernel symbols\n"); 178 179 if (!kernel->loadLocalSymbols(debugSymbolTable)) 180 fatal("could not load kernel local symbols\n"); 181 182 // Loading only needs to happen once and after memory system is 183 // connected so it will happen in initState() 184 } 185 186 for (const auto &obj_name : p->kernel_extras) { 187 inform("Loading additional kernel object: %s", obj_name); 188 ObjectFile *obj = createObjectFile(obj_name); 189 fatal_if(!obj, "Failed to additional kernel object '%s'.\n", 190 obj_name); 191 kernelExtras.push_back(obj); 192 } 193 } 194 195 // increment the number of running systems 196 numSystemsRunning++; 197 198 // Set back pointers to the system in all memories 199 for (int x = 0; x < params()->memories.size(); x++) 200 params()->memories[x]->system(this); 201} 202 203System::~System() 204{ 205 delete kernelSymtab; 206 delete kernel; 207 208 for (uint32_t j = 0; j < numWorkIds; j++) 209 delete workItemStats[j]; 210} 211 212void 213System::init() 214{ 215 // check that the system port is connected 216 if (!_systemPort.isConnected()) 217 panic("System port on %s is not connected.\n", name()); 218} 219 220BaseMasterPort& 221System::getMasterPort(const std::string &if_name, PortID idx) 222{ 223 // no need to distinguish at the moment (besides checking) 224 return _systemPort; 225} 226 227void 228System::setMemoryMode(Enums::MemoryMode mode) 229{ 230 assert(drainState() == DrainState::Drained); 231 memoryMode = mode; 232} 233 234bool System::breakpoint() 235{ 236 if (remoteGDB.size()) 237 return remoteGDB[0]->breakpoint(); 238 return false; 239} 240 241ContextID 242System::registerThreadContext(ThreadContext *tc, ContextID assigned) 243{ 244 int id = assigned; 245 if (id == InvalidContextID) { 246 // Find an unused context ID for this thread. 247 id = 0; 248 while (id < threadContexts.size() && threadContexts[id]) 249 id++; 250 } 251 252 if (threadContexts.size() <= id) 253 threadContexts.resize(id + 1); 254 255 fatal_if(threadContexts[id], 256 "Cannot have two CPUs with the same id (%d)\n", id); 257 258 threadContexts[id] = tc; 259 _numContexts++; 260 261#if THE_ISA != NULL_ISA 262 int port = getRemoteGDBPort(); 263 if (port) {
|
273 } 274 if (remoteGDB.size() <= id) { 275 remoteGDB.resize(id + 1); 276 } 277 278 remoteGDB[id] = rgdb; 279 } 280#endif 281 282 activeCpus.push_back(false); 283 284 return id; 285} 286 287int 288System::numRunningContexts() 289{ 290 int running = 0; 291 for (int i = 0; i < _numContexts; ++i) { 292 if (threadContexts[i]->status() != ThreadContext::Halted) 293 ++running; 294 } 295 return running; 296} 297 298void 299System::initState() 300{ 301 if (FullSystem) { 302 for (int i = 0; i < threadContexts.size(); i++) 303 TheISA::startupCPU(threadContexts[i], i); 304 // Moved from the constructor to here since it relies on the 305 // address map being resolved in the interconnect 306 /** 307 * Load the kernel code into memory 308 */ 309 if (params()->kernel != "") { 310 if (params()->kernel_addr_check) { 311 // Validate kernel mapping before loading binary 312 if (!(isMemAddr((kernelStart & loadAddrMask) + 313 loadAddrOffset) && 314 isMemAddr((kernelEnd & loadAddrMask) + 315 loadAddrOffset))) { 316 fatal("Kernel is mapped to invalid location (not memory). " 317 "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n", 318 kernelStart, 319 kernelEnd, (kernelStart & loadAddrMask) + 320 loadAddrOffset, 321 (kernelEnd & loadAddrMask) + loadAddrOffset); 322 } 323 } 324 // Load program sections into memory 325 kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset); 326 for (const auto &extra_kernel : kernelExtras) { 327 extra_kernel->loadSections(physProxy, loadAddrMask, 328 loadAddrOffset); 329 } 330 331 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 332 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 333 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 334 DPRINTF(Loader, "Kernel loaded...\n"); 335 } 336 } 337} 338 339void 340System::replaceThreadContext(ThreadContext *tc, ContextID context_id) 341{ 342 if (context_id >= threadContexts.size()) { 343 panic("replaceThreadContext: bad id, %d >= %d\n", 344 context_id, threadContexts.size()); 345 } 346 347 threadContexts[context_id] = tc; 348 if (context_id < remoteGDB.size()) 349 remoteGDB[context_id]->replaceThreadContext(tc); 350} 351 352bool 353System::validKvmEnvironment() const 354{ 355#if USE_KVM 356 if (threadContexts.empty()) 357 return false; 358 359 for (auto tc : threadContexts) { 360 if (dynamic_cast<BaseKvmCPU*>(tc->getCpuPtr()) == nullptr) { 361 return false; 362 } 363 } 364 return true; 365#else 366 return false; 367#endif 368} 369 370Addr 371System::allocPhysPages(int npages) 372{ 373 Addr return_addr = pagePtr << PageShift; 374 pagePtr += npages; 375 376 Addr next_return_addr = pagePtr << PageShift; 377 378 AddrRange m5opRange(0xffff0000, 0xffffffff); 379 if (m5opRange.contains(next_return_addr)) { 380 warn("Reached m5ops MMIO region\n"); 381 return_addr = 0xffffffff; 382 pagePtr = 0xffffffff >> PageShift; 383 } 384 385 if ((pagePtr << PageShift) > physmem.totalSize()) 386 fatal("Out of memory, please increase size of physical memory."); 387 return return_addr; 388} 389 390Addr 391System::memSize() const 392{ 393 return physmem.totalSize(); 394} 395 396Addr 397System::freeMemSize() const 398{ 399 return physmem.totalSize() - (pagePtr << PageShift); 400} 401 402bool 403System::isMemAddr(Addr addr) const 404{ 405 return physmem.isMemAddr(addr); 406} 407 408void 409System::drainResume() 410{ 411 totalNumInsts = 0; 412} 413 414void 415System::serialize(CheckpointOut &cp) const 416{ 417 if (FullSystem) 418 kernelSymtab->serialize("kernel_symtab", cp); 419 SERIALIZE_SCALAR(pagePtr); 420 serializeSymtab(cp); 421 422 // also serialize the memories in the system 423 physmem.serializeSection(cp, "physmem"); 424} 425 426 427void 428System::unserialize(CheckpointIn &cp) 429{ 430 if (FullSystem) 431 kernelSymtab->unserialize("kernel_symtab", cp); 432 UNSERIALIZE_SCALAR(pagePtr); 433 unserializeSymtab(cp); 434 435 // also unserialize the memories in the system 436 physmem.unserializeSection(cp, "physmem"); 437} 438 439void 440System::regStats() 441{ 442 MemObject::regStats(); 443 444 for (uint32_t j = 0; j < numWorkIds ; j++) { 445 workItemStats[j] = new Stats::Histogram(); 446 stringstream namestr; 447 ccprintf(namestr, "work_item_type%d", j); 448 workItemStats[j]->init(20) 449 .name(name() + "." + namestr.str()) 450 .desc("Run time stat for" + namestr.str()) 451 .prereq(*workItemStats[j]); 452 } 453} 454 455void 456System::workItemEnd(uint32_t tid, uint32_t workid) 457{ 458 std::pair<uint32_t,uint32_t> p(tid, workid); 459 if (!lastWorkItemStarted.count(p)) 460 return; 461 462 Tick samp = curTick() - lastWorkItemStarted[p]; 463 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 464 465 if (workid >= numWorkIds) 466 fatal("Got workid greater than specified in system configuration\n"); 467 468 workItemStats[workid]->sample(samp); 469 lastWorkItemStarted.erase(p); 470} 471 472void 473System::printSystems() 474{ 475 ios::fmtflags flags(cerr.flags()); 476 477 vector<System *>::iterator i = systemList.begin(); 478 vector<System *>::iterator end = systemList.end(); 479 for (; i != end; ++i) { 480 System *sys = *i; 481 cerr << "System " << sys->name() << ": " << hex << sys << endl; 482 } 483 484 cerr.flags(flags); 485} 486 487void 488printSystems() 489{ 490 System::printSystems(); 491} 492 493MasterID 494System::getMasterId(std::string master_name) 495{ 496 // strip off system name if the string starts with it 497 if (startswith(master_name, name())) 498 master_name = master_name.erase(0, name().size() + 1); 499 500 // CPUs in switch_cpus ask for ids again after switching 501 for (int i = 0; i < masterIds.size(); i++) { 502 if (masterIds[i] == master_name) { 503 return i; 504 } 505 } 506 507 // Verify that the statistics haven't been enabled yet 508 // Otherwise objects will have sized their stat buckets and 509 // they will be too small 510 511 if (Stats::enabled()) { 512 fatal("Can't request a masterId after regStats(). " 513 "You must do so in init().\n"); 514 } 515 516 masterIds.push_back(master_name); 517 518 return masterIds.size() - 1; 519} 520 521std::string 522System::getMasterName(MasterID master_id) 523{ 524 if (master_id >= masterIds.size()) 525 fatal("Invalid master_id passed to getMasterName()\n"); 526 527 return masterIds[master_id]; 528} 529 530System * 531SystemParams::create() 532{ 533 return new System(this); 534}
|