system.cc revision 8826
1/* 2 * Copyright (c) 2011-2012 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) 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 "arch/vtophys.hh" 52#include "base/loader/object_file.hh" 53#include "base/loader/symtab.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/fs_translating_port_proxy.hh" 61#include "mem/mem_object.hh" 62#include "mem/physical.hh" 63#include "params/System.hh" 64#include "sim/byteswap.hh" 65#include "sim/debug.hh" 66#include "sim/full_system.hh" 67#include "sim/system.hh" 68 69using namespace std; 70using namespace TheISA; 71 72vector<System *> System::systemList; 73 74int System::numSystemsRunning = 0; 75 76System::System(Params *p) 77 : MemObject(p), _systemPort("system_port", this), 78 physmem(p->physmem), 79 _numContexts(0), 80 pagePtr(0), 81 init_param(p->init_param), 82 loadAddrMask(p->load_addr_mask), 83 nextPID(0), 84 memoryMode(p->mem_mode), 85 workItemsBegin(0), 86 workItemsEnd(0), 87 numWorkIds(p->num_work_ids), 88 _params(p), 89 totalNumInsts(0), 90 instEventQueue("system instruction-based event queue") 91{ 92 // add self to global system list 93 systemList.push_back(this); 94 95 /** Keep track of all memories we can execute code out of 96 * in our system 97 */ 98 for (int x = 0; x < p->memories.size(); x++) { 99 if (!p->memories[x]) 100 continue; 101 memRanges.push_back(RangeSize(p->memories[x]->start(), 102 p->memories[x]->size())); 103 } 104 105 if (FullSystem) { 106 kernelSymtab = new SymbolTable; 107 if (!debugSymbolTable) 108 debugSymbolTable = new SymbolTable; 109 110 /** 111 * Get a port proxy to memory 112 */ 113 physProxy = new PortProxy(*getSystemPort()); 114 virtProxy = new FSTranslatingPortProxy(*getSystemPort()); 115 } 116} 117 118System::~System() 119{ 120 delete kernelSymtab; 121 delete kernel; 122 123 for (uint32_t j = 0; j < numWorkIds; j++) 124 delete workItemStats[j]; 125} 126 127void 128System::init() 129{ 130 // check that the system port is connected 131 if (!_systemPort.isConnected()) 132 panic("System port on %s is not connected.\n", name()); 133} 134 135Port* 136System::getPort(const std::string &if_name, int idx) 137{ 138 // no need to distinguish at the moment (besides checking) 139 return &_systemPort; 140} 141 142void 143System::setMemoryMode(Enums::MemoryMode mode) 144{ 145 assert(getState() == Drained); 146 memoryMode = mode; 147} 148 149bool System::breakpoint() 150{ 151 if (remoteGDB.size()) 152 return remoteGDB[0]->breakpoint(); 153 return false; 154} 155 156/** 157 * Setting rgdb_wait to a positive integer waits for a remote debugger to 158 * connect to that context ID before continuing. This should really 159 be a parameter on the CPU object or something... 160 */ 161int rgdb_wait = -1; 162 163int 164System::registerThreadContext(ThreadContext *tc, int assigned) 165{ 166 int id; 167 if (assigned == -1) { 168 for (id = 0; id < threadContexts.size(); id++) { 169 if (!threadContexts[id]) 170 break; 171 } 172 173 if (threadContexts.size() <= id) 174 threadContexts.resize(id + 1); 175 } else { 176 if (threadContexts.size() <= assigned) 177 threadContexts.resize(assigned + 1); 178 id = assigned; 179 } 180 181 if (threadContexts[id]) 182 fatal("Cannot have two CPUs with the same id (%d)\n", id); 183 184 threadContexts[id] = tc; 185 _numContexts++; 186 187 int port = getRemoteGDBPort(); 188 if (port) { 189 RemoteGDB *rgdb = new RemoteGDB(this, tc); 190 GDBListener *gdbl = new GDBListener(rgdb, port + id); 191 gdbl->listen(); 192 193 if (rgdb_wait != -1 && rgdb_wait == id) 194 gdbl->accept(); 195 196 if (remoteGDB.size() <= id) { 197 remoteGDB.resize(id + 1); 198 } 199 200 remoteGDB[id] = rgdb; 201 } 202 203 activeCpus.push_back(false); 204 205 return id; 206} 207 208int 209System::numRunningContexts() 210{ 211 int running = 0; 212 for (int i = 0; i < _numContexts; ++i) { 213 if (threadContexts[i]->status() != ThreadContext::Halted) 214 ++running; 215 } 216 return running; 217} 218 219void 220System::initState() 221{ 222 int i; 223 if (FullSystem) { 224 for (i = 0; i < threadContexts.size(); i++) 225 TheISA::startupCPU(threadContexts[i], i); 226 // Moved from the constructor to here since it relies on the 227 // address map being resolved in the interconnect 228 /** 229 * Load the kernel code into memory 230 */ 231 if (params()->kernel == "") { 232 inform("No kernel set for full system simulation. " 233 "Assuming you know what you're doing...\n"); 234 } else { 235 // Load kernel code 236 kernel = createObjectFile(params()->kernel); 237 inform("kernel located at: %s", params()->kernel); 238 239 if (kernel == NULL) 240 fatal("Could not load kernel file %s", params()->kernel); 241 242 // Load program sections into memory 243 kernel->loadSections(physProxy, loadAddrMask); 244 245 // setup entry points 246 kernelStart = kernel->textBase(); 247 kernelEnd = kernel->bssBase() + kernel->bssSize(); 248 kernelEntry = kernel->entryPoint(); 249 250 // load symbols 251 if (!kernel->loadGlobalSymbols(kernelSymtab)) 252 fatal("could not load kernel symbols\n"); 253 254 if (!kernel->loadLocalSymbols(kernelSymtab)) 255 fatal("could not load kernel local symbols\n"); 256 257 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 258 fatal("could not load kernel symbols\n"); 259 260 if (!kernel->loadLocalSymbols(debugSymbolTable)) 261 fatal("could not load kernel local symbols\n"); 262 263 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 264 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 265 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 266 DPRINTF(Loader, "Kernel loaded...\n"); 267 } 268 } 269 270 // increment the number of running systms 271 numSystemsRunning++; 272 273 activeCpus.clear(); 274 275 if (!FullSystem) 276 return; 277 278 for (i = 0; i < threadContexts.size(); i++) 279 TheISA::startupCPU(threadContexts[i], i); 280} 281 282void 283System::replaceThreadContext(ThreadContext *tc, int context_id) 284{ 285 if (context_id >= threadContexts.size()) { 286 panic("replaceThreadContext: bad id, %d >= %d\n", 287 context_id, threadContexts.size()); 288 } 289 290 threadContexts[context_id] = tc; 291 if (context_id < remoteGDB.size()) 292 remoteGDB[context_id]->replaceThreadContext(tc); 293} 294 295Addr 296System::allocPhysPages(int npages) 297{ 298 Addr return_addr = pagePtr << LogVMPageSize; 299 pagePtr += npages; 300 if (pagePtr > physmem->size()) 301 fatal("Out of memory, please increase size of physical memory."); 302 return return_addr; 303} 304 305Addr 306System::memSize() 307{ 308 return physmem->size(); 309} 310 311Addr 312System::freeMemSize() 313{ 314 return physmem->size() - (pagePtr << LogVMPageSize); 315} 316 317bool 318System::isMemory(const Addr addr) const 319{ 320 std::list<Range<Addr> >::const_iterator i; 321 for (i = memRanges.begin(); i != memRanges.end(); i++) { 322 if (*i == addr) 323 return true; 324 } 325 return false; 326} 327 328void 329System::resume() 330{ 331 SimObject::resume(); 332 totalNumInsts = 0; 333} 334 335void 336System::serialize(ostream &os) 337{ 338 if (FullSystem) 339 kernelSymtab->serialize("kernel_symtab", os); 340 SERIALIZE_SCALAR(pagePtr); 341 SERIALIZE_SCALAR(nextPID); 342} 343 344 345void 346System::unserialize(Checkpoint *cp, const string §ion) 347{ 348 if (FullSystem) 349 kernelSymtab->unserialize("kernel_symtab", cp, section); 350 UNSERIALIZE_SCALAR(pagePtr); 351 UNSERIALIZE_SCALAR(nextPID); 352} 353 354void 355System::regStats() 356{ 357 for (uint32_t j = 0; j < numWorkIds ; j++) { 358 workItemStats[j] = new Stats::Histogram(); 359 stringstream namestr; 360 ccprintf(namestr, "work_item_type%d", j); 361 workItemStats[j]->init(20) 362 .name(name() + "." + namestr.str()) 363 .desc("Run time stat for" + namestr.str()) 364 .prereq(*workItemStats[j]); 365 } 366} 367 368void 369System::workItemEnd(uint32_t tid, uint32_t workid) 370{ 371 std::pair<uint32_t,uint32_t> p(tid, workid); 372 if (!lastWorkItemStarted.count(p)) 373 return; 374 375 Tick samp = curTick() - lastWorkItemStarted[p]; 376 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 377 378 if (workid >= numWorkIds) 379 fatal("Got workid greater than specified in system configuration\n"); 380 381 workItemStats[workid]->sample(samp); 382 lastWorkItemStarted.erase(p); 383} 384 385void 386System::printSystems() 387{ 388 vector<System *>::iterator i = systemList.begin(); 389 vector<System *>::iterator end = systemList.end(); 390 for (; i != end; ++i) { 391 System *sys = *i; 392 cerr << "System " << sys->name() << ": " << hex << sys << endl; 393 } 394} 395 396void 397printSystems() 398{ 399 System::printSystems(); 400} 401 402const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 403 "timing"}; 404 405System * 406SystemParams::create() 407{ 408 return new System(this); 409} 410