system.cc revision 10360:919c02740209
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 "arch/isa_traits.hh" 49#include "arch/remote_gdb.hh" 50#include "arch/utility.hh" 51#include "base/loader/object_file.hh" 52#include "base/loader/symtab.hh" 53#include "base/str.hh" 54#include "base/trace.hh" 55#include "config/the_isa.hh" 56#include "cpu/thread_context.hh" 57#include "debug/Loader.hh" 58#include "debug/WorkItems.hh" 59#include "kern/kernel_stats.hh" 60#include "mem/abstract_mem.hh" 61#include "mem/physical.hh" 62#include "params/System.hh" 63#include "sim/byteswap.hh" 64#include "sim/debug.hh" 65#include "sim/full_system.hh" 66#include "sim/system.hh" 67 68using namespace std; 69using namespace TheISA; 70 71vector<System *> System::systemList; 72 73int System::numSystemsRunning = 0; 74 75System::System(Params *p) 76 : MemObject(p), _systemPort("system_port", this), 77 _numContexts(0), 78 pagePtr(0), 79 init_param(p->init_param), 80 physProxy(_systemPort, p->cache_line_size), 81 kernelSymtab(nullptr), 82 kernel(nullptr), 83 loadAddrMask(p->load_addr_mask), 84 loadAddrOffset(p->load_offset), 85 nextPID(0), 86 physmem(name() + ".physmem", p->memories), 87 memoryMode(p->mem_mode), 88 _cacheLineSize(p->cache_line_size), 89 workItemsBegin(0), 90 workItemsEnd(0), 91 numWorkIds(p->num_work_ids), 92 _params(p), 93 totalNumInsts(0), 94 instEventQueue("system instruction-based event queue") 95{ 96 // add self to global system list 97 systemList.push_back(this); 98 99 if (FullSystem) { 100 kernelSymtab = new SymbolTable; 101 if (!debugSymbolTable) 102 debugSymbolTable = new SymbolTable; 103 } 104 105 // check if the cache line size is a value known to work 106 if (!(_cacheLineSize == 16 || _cacheLineSize == 32 || 107 _cacheLineSize == 64 || _cacheLineSize == 128)) 108 warn_once("Cache line size is neither 16, 32, 64 nor 128 bytes.\n"); 109 110 // Get the generic system master IDs 111 MasterID tmp_id M5_VAR_USED; 112 tmp_id = getMasterId("writebacks"); 113 assert(tmp_id == Request::wbMasterId); 114 tmp_id = getMasterId("functional"); 115 assert(tmp_id == Request::funcMasterId); 116 tmp_id = getMasterId("interrupt"); 117 assert(tmp_id == Request::intMasterId); 118 119 if (FullSystem) { 120 if (params()->kernel == "") { 121 inform("No kernel set for full system simulation. " 122 "Assuming you know what you're doing\n"); 123 } else { 124 // Get the kernel code 125 kernel = createObjectFile(params()->kernel); 126 inform("kernel located at: %s", params()->kernel); 127 128 if (kernel == NULL) 129 fatal("Could not load kernel file %s", params()->kernel); 130 131 // setup entry points 132 kernelStart = kernel->textBase(); 133 kernelEnd = kernel->bssBase() + kernel->bssSize(); 134 kernelEntry = kernel->entryPoint(); 135 136 // load symbols 137 if (!kernel->loadGlobalSymbols(kernelSymtab)) 138 fatal("could not load kernel symbols\n"); 139 140 if (!kernel->loadLocalSymbols(kernelSymtab)) 141 fatal("could not load kernel local symbols\n"); 142 143 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 144 fatal("could not load kernel symbols\n"); 145 146 if (!kernel->loadLocalSymbols(debugSymbolTable)) 147 fatal("could not load kernel local symbols\n"); 148 149 // Loading only needs to happen once and after memory system is 150 // connected so it will happen in initState() 151 } 152 } 153 154 // increment the number of running systms 155 numSystemsRunning++; 156 157 // Set back pointers to the system in all memories 158 for (int x = 0; x < params()->memories.size(); x++) 159 params()->memories[x]->system(this); 160} 161 162System::~System() 163{ 164 delete kernelSymtab; 165 delete kernel; 166 167 for (uint32_t j = 0; j < numWorkIds; j++) 168 delete workItemStats[j]; 169} 170 171void 172System::init() 173{ 174 // check that the system port is connected 175 if (!_systemPort.isConnected()) 176 panic("System port on %s is not connected.\n", name()); 177} 178 179BaseMasterPort& 180System::getMasterPort(const std::string &if_name, PortID idx) 181{ 182 // no need to distinguish at the moment (besides checking) 183 return _systemPort; 184} 185 186void 187System::setMemoryMode(Enums::MemoryMode mode) 188{ 189 assert(getDrainState() == Drainable::Drained); 190 memoryMode = mode; 191} 192 193bool System::breakpoint() 194{ 195 if (remoteGDB.size()) 196 return remoteGDB[0]->breakpoint(); 197 return false; 198} 199 200/** 201 * Setting rgdb_wait to a positive integer waits for a remote debugger to 202 * connect to that context ID before continuing. This should really 203 be a parameter on the CPU object or something... 204 */ 205int rgdb_wait = -1; 206 207int 208System::registerThreadContext(ThreadContext *tc, int assigned) 209{ 210 int id; 211 if (assigned == -1) { 212 for (id = 0; id < threadContexts.size(); id++) { 213 if (!threadContexts[id]) 214 break; 215 } 216 217 if (threadContexts.size() <= id) 218 threadContexts.resize(id + 1); 219 } else { 220 if (threadContexts.size() <= assigned) 221 threadContexts.resize(assigned + 1); 222 id = assigned; 223 } 224 225 if (threadContexts[id]) 226 fatal("Cannot have two CPUs with the same id (%d)\n", id); 227 228 threadContexts[id] = tc; 229 _numContexts++; 230 231#if THE_ISA != NULL_ISA 232 int port = getRemoteGDBPort(); 233 if (port) { 234 RemoteGDB *rgdb = new RemoteGDB(this, tc); 235 GDBListener *gdbl = new GDBListener(rgdb, port + id); 236 gdbl->listen(); 237 238 if (rgdb_wait != -1 && rgdb_wait == id) 239 gdbl->accept(); 240 241 if (remoteGDB.size() <= id) { 242 remoteGDB.resize(id + 1); 243 } 244 245 remoteGDB[id] = rgdb; 246 } 247#endif 248 249 activeCpus.push_back(false); 250 251 return id; 252} 253 254int 255System::numRunningContexts() 256{ 257 int running = 0; 258 for (int i = 0; i < _numContexts; ++i) { 259 if (threadContexts[i]->status() != ThreadContext::Halted) 260 ++running; 261 } 262 return running; 263} 264 265void 266System::initState() 267{ 268 if (FullSystem) { 269 for (int i = 0; i < threadContexts.size(); i++) 270 TheISA::startupCPU(threadContexts[i], i); 271 // Moved from the constructor to here since it relies on the 272 // address map being resolved in the interconnect 273 /** 274 * Load the kernel code into memory 275 */ 276 if (params()->kernel != "") { 277 if (params()->kernel_addr_check) { 278 // Validate kernel mapping before loading binary 279 if (!(isMemAddr((kernelStart & loadAddrMask) + 280 loadAddrOffset) && 281 isMemAddr((kernelEnd & loadAddrMask) + 282 loadAddrOffset))) { 283 fatal("Kernel is mapped to invalid location (not memory). " 284 "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n", 285 kernelStart, 286 kernelEnd, (kernelStart & loadAddrMask) + 287 loadAddrOffset, 288 (kernelEnd & loadAddrMask) + loadAddrOffset); 289 } 290 } 291 // Load program sections into memory 292 kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset); 293 294 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 295 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 296 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 297 DPRINTF(Loader, "Kernel loaded...\n"); 298 } 299 } 300 301 activeCpus.clear(); 302} 303 304void 305System::replaceThreadContext(ThreadContext *tc, int context_id) 306{ 307 if (context_id >= threadContexts.size()) { 308 panic("replaceThreadContext: bad id, %d >= %d\n", 309 context_id, threadContexts.size()); 310 } 311 312 threadContexts[context_id] = tc; 313 if (context_id < remoteGDB.size()) 314 remoteGDB[context_id]->replaceThreadContext(tc); 315} 316 317Addr 318System::allocPhysPages(int npages) 319{ 320 Addr return_addr = pagePtr << PageShift; 321 pagePtr += npages; 322 if ((pagePtr << PageShift) > physmem.totalSize()) 323 fatal("Out of memory, please increase size of physical memory."); 324 return return_addr; 325} 326 327Addr 328System::memSize() const 329{ 330 return physmem.totalSize(); 331} 332 333Addr 334System::freeMemSize() const 335{ 336 return physmem.totalSize() - (pagePtr << PageShift); 337} 338 339bool 340System::isMemAddr(Addr addr) const 341{ 342 return physmem.isMemAddr(addr); 343} 344 345unsigned int 346System::drain(DrainManager *dm) 347{ 348 setDrainState(Drainable::Drained); 349 return 0; 350} 351 352void 353System::drainResume() 354{ 355 Drainable::drainResume(); 356 totalNumInsts = 0; 357} 358 359void 360System::serialize(ostream &os) 361{ 362 if (FullSystem) 363 kernelSymtab->serialize("kernel_symtab", os); 364 SERIALIZE_SCALAR(pagePtr); 365 SERIALIZE_SCALAR(nextPID); 366 serializeSymtab(os); 367 368 // also serialize the memories in the system 369 nameOut(os, csprintf("%s.physmem", name())); 370 physmem.serialize(os); 371} 372 373 374void 375System::unserialize(Checkpoint *cp, const string §ion) 376{ 377 if (FullSystem) 378 kernelSymtab->unserialize("kernel_symtab", cp, section); 379 UNSERIALIZE_SCALAR(pagePtr); 380 UNSERIALIZE_SCALAR(nextPID); 381 unserializeSymtab(cp, section); 382 383 // also unserialize the memories in the system 384 physmem.unserialize(cp, csprintf("%s.physmem", name())); 385} 386 387void 388System::regStats() 389{ 390 for (uint32_t j = 0; j < numWorkIds ; j++) { 391 workItemStats[j] = new Stats::Histogram(); 392 stringstream namestr; 393 ccprintf(namestr, "work_item_type%d", j); 394 workItemStats[j]->init(20) 395 .name(name() + "." + namestr.str()) 396 .desc("Run time stat for" + namestr.str()) 397 .prereq(*workItemStats[j]); 398 } 399} 400 401void 402System::workItemEnd(uint32_t tid, uint32_t workid) 403{ 404 std::pair<uint32_t,uint32_t> p(tid, workid); 405 if (!lastWorkItemStarted.count(p)) 406 return; 407 408 Tick samp = curTick() - lastWorkItemStarted[p]; 409 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 410 411 if (workid >= numWorkIds) 412 fatal("Got workid greater than specified in system configuration\n"); 413 414 workItemStats[workid]->sample(samp); 415 lastWorkItemStarted.erase(p); 416} 417 418void 419System::printSystems() 420{ 421 vector<System *>::iterator i = systemList.begin(); 422 vector<System *>::iterator end = systemList.end(); 423 for (; i != end; ++i) { 424 System *sys = *i; 425 cerr << "System " << sys->name() << ": " << hex << sys << endl; 426 } 427} 428 429void 430printSystems() 431{ 432 System::printSystems(); 433} 434 435MasterID 436System::getMasterId(std::string master_name) 437{ 438 // strip off system name if the string starts with it 439 if (startswith(master_name, name())) 440 master_name = master_name.erase(0, name().size() + 1); 441 442 // CPUs in switch_cpus ask for ids again after switching 443 for (int i = 0; i < masterIds.size(); i++) { 444 if (masterIds[i] == master_name) { 445 return i; 446 } 447 } 448 449 // Verify that the statistics haven't been enabled yet 450 // Otherwise objects will have sized their stat buckets and 451 // they will be too small 452 453 if (Stats::enabled()) 454 fatal("Can't request a masterId after regStats(). \ 455 You must do so in init().\n"); 456 457 masterIds.push_back(master_name); 458 459 return masterIds.size() - 1; 460} 461 462std::string 463System::getMasterName(MasterID master_id) 464{ 465 if (master_id >= masterIds.size()) 466 fatal("Invalid master_id passed to getMasterName()\n"); 467 468 return masterIds[master_id]; 469} 470 471System * 472SystemParams::create() 473{ 474 return new System(this); 475} 476