system.cc revision 10466:73b7549d979e
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/remote_gdb.hh" 49#include "arch/utility.hh" 50#include "base/loader/object_file.hh" 51#include "base/loader/symtab.hh" 52#include "base/str.hh" 53#include "base/trace.hh" 54#include "cpu/thread_context.hh" 55#include "debug/Loader.hh" 56#include "debug/WorkItems.hh" 57#include "kern/kernel_stats.hh" 58#include "mem/abstract_mem.hh" 59#include "mem/physical.hh" 60#include "params/System.hh" 61#include "sim/byteswap.hh" 62#include "sim/debug.hh" 63#include "sim/full_system.hh" 64#include "sim/system.hh" 65 66using namespace std; 67using namespace TheISA; 68 69vector<System *> System::systemList; 70 71int System::numSystemsRunning = 0; 72 73System::System(Params *p) 74 : MemObject(p), _systemPort("system_port", this), 75 _numContexts(0), 76 pagePtr(0), 77 init_param(p->init_param), 78 physProxy(_systemPort, p->cache_line_size), 79 kernelSymtab(nullptr), 80 kernel(nullptr), 81 loadAddrMask(p->load_addr_mask), 82 loadAddrOffset(p->load_offset), 83 nextPID(0), 84 physmem(name() + ".physmem", p->memories), 85 memoryMode(p->mem_mode), 86 _cacheLineSize(p->cache_line_size), 87 workItemsBegin(0), 88 workItemsEnd(0), 89 numWorkIds(p->num_work_ids), 90 _params(p), 91 totalNumInsts(0), 92 instEventQueue("system instruction-based event queue") 93{ 94 // add self to global system list 95 systemList.push_back(this); 96 97 if (FullSystem) { 98 kernelSymtab = new SymbolTable; 99 if (!debugSymbolTable) 100 debugSymbolTable = new SymbolTable; 101 } 102 103 // check if the cache line size is a value known to work 104 if (!(_cacheLineSize == 16 || _cacheLineSize == 32 || 105 _cacheLineSize == 64 || _cacheLineSize == 128)) 106 warn_once("Cache line size is neither 16, 32, 64 nor 128 bytes.\n"); 107 108 // Get the generic system master IDs 109 MasterID tmp_id M5_VAR_USED; 110 tmp_id = getMasterId("writebacks"); 111 assert(tmp_id == Request::wbMasterId); 112 tmp_id = getMasterId("functional"); 113 assert(tmp_id == Request::funcMasterId); 114 tmp_id = getMasterId("interrupt"); 115 assert(tmp_id == Request::intMasterId); 116 117 if (FullSystem) { 118 if (params()->kernel == "") { 119 inform("No kernel set for full system simulation. " 120 "Assuming you know what you're doing\n"); 121 } else { 122 // Get the kernel code 123 kernel = createObjectFile(params()->kernel); 124 inform("kernel located at: %s", params()->kernel); 125 126 if (kernel == NULL) 127 fatal("Could not load kernel file %s", params()->kernel); 128 129 // setup entry points 130 kernelStart = kernel->textBase(); 131 kernelEnd = kernel->bssBase() + kernel->bssSize(); 132 kernelEntry = kernel->entryPoint(); 133 134 // load symbols 135 if (!kernel->loadGlobalSymbols(kernelSymtab)) 136 fatal("could not load kernel symbols\n"); 137 138 if (!kernel->loadLocalSymbols(kernelSymtab)) 139 fatal("could not load kernel local symbols\n"); 140 141 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 142 fatal("could not load kernel symbols\n"); 143 144 if (!kernel->loadLocalSymbols(debugSymbolTable)) 145 fatal("could not load kernel local symbols\n"); 146 147 // Loading only needs to happen once and after memory system is 148 // connected so it will happen in initState() 149 } 150 } 151 152 // increment the number of running systms 153 numSystemsRunning++; 154 155 // Set back pointers to the system in all memories 156 for (int x = 0; x < params()->memories.size(); x++) 157 params()->memories[x]->system(this); 158} 159 160System::~System() 161{ 162 delete kernelSymtab; 163 delete kernel; 164 165 for (uint32_t j = 0; j < numWorkIds; j++) 166 delete workItemStats[j]; 167} 168 169void 170System::init() 171{ 172 // check that the system port is connected 173 if (!_systemPort.isConnected()) 174 panic("System port on %s is not connected.\n", name()); 175} 176 177BaseMasterPort& 178System::getMasterPort(const std::string &if_name, PortID idx) 179{ 180 // no need to distinguish at the moment (besides checking) 181 return _systemPort; 182} 183 184void 185System::setMemoryMode(Enums::MemoryMode mode) 186{ 187 assert(getDrainState() == Drainable::Drained); 188 memoryMode = mode; 189} 190 191bool System::breakpoint() 192{ 193 if (remoteGDB.size()) 194 return remoteGDB[0]->breakpoint(); 195 return false; 196} 197 198/** 199 * Setting rgdb_wait to a positive integer waits for a remote debugger to 200 * connect to that context ID before continuing. This should really 201 be a parameter on the CPU object or something... 202 */ 203int rgdb_wait = -1; 204 205int 206System::registerThreadContext(ThreadContext *tc, int assigned) 207{ 208 int id; 209 if (assigned == -1) { 210 for (id = 0; id < threadContexts.size(); id++) { 211 if (!threadContexts[id]) 212 break; 213 } 214 215 if (threadContexts.size() <= id) 216 threadContexts.resize(id + 1); 217 } else { 218 if (threadContexts.size() <= assigned) 219 threadContexts.resize(assigned + 1); 220 id = assigned; 221 } 222 223 if (threadContexts[id]) 224 fatal("Cannot have two CPUs with the same id (%d)\n", id); 225 226 threadContexts[id] = tc; 227 _numContexts++; 228 229#if THE_ISA != NULL_ISA 230 int port = getRemoteGDBPort(); 231 if (port) { 232 RemoteGDB *rgdb = new RemoteGDB(this, tc); 233 GDBListener *gdbl = new GDBListener(rgdb, port + id); 234 gdbl->listen(); 235 236 if (rgdb_wait != -1 && rgdb_wait == id) 237 gdbl->accept(); 238 239 if (remoteGDB.size() <= id) { 240 remoteGDB.resize(id + 1); 241 } 242 243 remoteGDB[id] = rgdb; 244 } 245#endif 246 247 activeCpus.push_back(false); 248 249 return id; 250} 251 252int 253System::numRunningContexts() 254{ 255 int running = 0; 256 for (int i = 0; i < _numContexts; ++i) { 257 if (threadContexts[i]->status() != ThreadContext::Halted) 258 ++running; 259 } 260 return running; 261} 262 263void 264System::initState() 265{ 266 if (FullSystem) { 267 for (int i = 0; i < threadContexts.size(); i++) 268 TheISA::startupCPU(threadContexts[i], i); 269 // Moved from the constructor to here since it relies on the 270 // address map being resolved in the interconnect 271 /** 272 * Load the kernel code into memory 273 */ 274 if (params()->kernel != "") { 275 if (params()->kernel_addr_check) { 276 // Validate kernel mapping before loading binary 277 if (!(isMemAddr((kernelStart & loadAddrMask) + 278 loadAddrOffset) && 279 isMemAddr((kernelEnd & loadAddrMask) + 280 loadAddrOffset))) { 281 fatal("Kernel is mapped to invalid location (not memory). " 282 "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n", 283 kernelStart, 284 kernelEnd, (kernelStart & loadAddrMask) + 285 loadAddrOffset, 286 (kernelEnd & loadAddrMask) + loadAddrOffset); 287 } 288 } 289 // Load program sections into memory 290 kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset); 291 292 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 293 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 294 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 295 DPRINTF(Loader, "Kernel loaded...\n"); 296 } 297 } 298 299 activeCpus.clear(); 300} 301 302void 303System::replaceThreadContext(ThreadContext *tc, int context_id) 304{ 305 if (context_id >= threadContexts.size()) { 306 panic("replaceThreadContext: bad id, %d >= %d\n", 307 context_id, threadContexts.size()); 308 } 309 310 threadContexts[context_id] = tc; 311 if (context_id < remoteGDB.size()) 312 remoteGDB[context_id]->replaceThreadContext(tc); 313} 314 315Addr 316System::allocPhysPages(int npages) 317{ 318 Addr return_addr = pagePtr << PageShift; 319 pagePtr += npages; 320 if ((pagePtr << PageShift) > physmem.totalSize()) 321 fatal("Out of memory, please increase size of physical memory."); 322 return return_addr; 323} 324 325Addr 326System::memSize() const 327{ 328 return physmem.totalSize(); 329} 330 331Addr 332System::freeMemSize() const 333{ 334 return physmem.totalSize() - (pagePtr << PageShift); 335} 336 337bool 338System::isMemAddr(Addr addr) const 339{ 340 return physmem.isMemAddr(addr); 341} 342 343unsigned int 344System::drain(DrainManager *dm) 345{ 346 setDrainState(Drainable::Drained); 347 return 0; 348} 349 350void 351System::drainResume() 352{ 353 Drainable::drainResume(); 354 totalNumInsts = 0; 355} 356 357void 358System::serialize(ostream &os) 359{ 360 if (FullSystem) 361 kernelSymtab->serialize("kernel_symtab", os); 362 SERIALIZE_SCALAR(pagePtr); 363 SERIALIZE_SCALAR(nextPID); 364 serializeSymtab(os); 365 366 // also serialize the memories in the system 367 nameOut(os, csprintf("%s.physmem", name())); 368 physmem.serialize(os); 369} 370 371 372void 373System::unserialize(Checkpoint *cp, const string §ion) 374{ 375 if (FullSystem) 376 kernelSymtab->unserialize("kernel_symtab", cp, section); 377 UNSERIALIZE_SCALAR(pagePtr); 378 UNSERIALIZE_SCALAR(nextPID); 379 unserializeSymtab(cp, section); 380 381 // also unserialize the memories in the system 382 physmem.unserialize(cp, csprintf("%s.physmem", name())); 383} 384 385void 386System::regStats() 387{ 388 for (uint32_t j = 0; j < numWorkIds ; j++) { 389 workItemStats[j] = new Stats::Histogram(); 390 stringstream namestr; 391 ccprintf(namestr, "work_item_type%d", j); 392 workItemStats[j]->init(20) 393 .name(name() + "." + namestr.str()) 394 .desc("Run time stat for" + namestr.str()) 395 .prereq(*workItemStats[j]); 396 } 397} 398 399void 400System::workItemEnd(uint32_t tid, uint32_t workid) 401{ 402 std::pair<uint32_t,uint32_t> p(tid, workid); 403 if (!lastWorkItemStarted.count(p)) 404 return; 405 406 Tick samp = curTick() - lastWorkItemStarted[p]; 407 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 408 409 if (workid >= numWorkIds) 410 fatal("Got workid greater than specified in system configuration\n"); 411 412 workItemStats[workid]->sample(samp); 413 lastWorkItemStarted.erase(p); 414} 415 416void 417System::printSystems() 418{ 419 ios::fmtflags flags(cerr.flags()); 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 cerr.flags(flags); 429} 430 431void 432printSystems() 433{ 434 System::printSystems(); 435} 436 437MasterID 438System::getMasterId(std::string master_name) 439{ 440 // strip off system name if the string starts with it 441 if (startswith(master_name, name())) 442 master_name = master_name.erase(0, name().size() + 1); 443 444 // CPUs in switch_cpus ask for ids again after switching 445 for (int i = 0; i < masterIds.size(); i++) { 446 if (masterIds[i] == master_name) { 447 return i; 448 } 449 } 450 451 // Verify that the statistics haven't been enabled yet 452 // Otherwise objects will have sized their stat buckets and 453 // they will be too small 454 455 if (Stats::enabled()) { 456 fatal("Can't request a masterId after regStats(). " 457 "You must do so in init().\n"); 458 } 459 460 masterIds.push_back(master_name); 461 462 return masterIds.size() - 1; 463} 464 465std::string 466System::getMasterName(MasterID master_id) 467{ 468 if (master_id >= masterIds.size()) 469 fatal("Invalid master_id passed to getMasterName()\n"); 470 471 return masterIds[master_id]; 472} 473 474System * 475SystemParams::create() 476{ 477 return new System(this); 478} 479