system.cc revision 9147:05137f17887e
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/str.hh" 55#include "base/trace.hh" 56#include "config/the_isa.hh" 57#include "cpu/thread_context.hh" 58#include "debug/Loader.hh" 59#include "debug/WorkItems.hh" 60#include "kern/kernel_stats.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), 81 virtProxy(_systemPort), 82 loadAddrMask(p->load_addr_mask), 83 nextPID(0), 84 physmem(p->memories), 85 memoryMode(p->mem_mode), 86 workItemsBegin(0), 87 workItemsEnd(0), 88 numWorkIds(p->num_work_ids), 89 _params(p), 90 totalNumInsts(0), 91 instEventQueue("system instruction-based event queue") 92{ 93 // add self to global system list 94 systemList.push_back(this); 95 96 if (FullSystem) { 97 kernelSymtab = new SymbolTable; 98 if (!debugSymbolTable) 99 debugSymbolTable = new SymbolTable; 100 } 101 102 // Get the generic system master IDs 103 MasterID tmp_id M5_VAR_USED; 104 tmp_id = getMasterId("writebacks"); 105 assert(tmp_id == Request::wbMasterId); 106 tmp_id = getMasterId("functional"); 107 assert(tmp_id == Request::funcMasterId); 108 tmp_id = getMasterId("interrupt"); 109 assert(tmp_id == Request::intMasterId); 110 111 if (FullSystem) { 112 if (params()->kernel == "") { 113 inform("No kernel set for full system simulation. " 114 "Assuming you know what you're doing\n"); 115 116 kernel = NULL; 117 } else { 118 // Get the kernel code 119 kernel = createObjectFile(params()->kernel); 120 inform("kernel located at: %s", params()->kernel); 121 122 if (kernel == NULL) 123 fatal("Could not load kernel file %s", params()->kernel); 124 125 // setup entry points 126 kernelStart = kernel->textBase(); 127 kernelEnd = kernel->bssBase() + kernel->bssSize(); 128 kernelEntry = kernel->entryPoint(); 129 130 // load symbols 131 if (!kernel->loadGlobalSymbols(kernelSymtab)) 132 fatal("could not load kernel symbols\n"); 133 134 if (!kernel->loadLocalSymbols(kernelSymtab)) 135 fatal("could not load kernel local symbols\n"); 136 137 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 138 fatal("could not load kernel symbols\n"); 139 140 if (!kernel->loadLocalSymbols(debugSymbolTable)) 141 fatal("could not load kernel local symbols\n"); 142 143 // Loading only needs to happen once and after memory system is 144 // connected so it will happen in initState() 145 } 146 } 147 148 // increment the number of running systms 149 numSystemsRunning++; 150 151 // Set back pointers to the system in all memories 152 for (int x = 0; x < params()->memories.size(); x++) 153 params()->memories[x]->system(this); 154} 155 156System::~System() 157{ 158 delete kernelSymtab; 159 delete kernel; 160 161 for (uint32_t j = 0; j < numWorkIds; j++) 162 delete workItemStats[j]; 163} 164 165void 166System::init() 167{ 168 // check that the system port is connected 169 if (!_systemPort.isConnected()) 170 panic("System port on %s is not connected.\n", name()); 171} 172 173MasterPort& 174System::getMasterPort(const std::string &if_name, int idx) 175{ 176 // no need to distinguish at the moment (besides checking) 177 return _systemPort; 178} 179 180void 181System::setMemoryMode(Enums::MemoryMode mode) 182{ 183 assert(getState() == Drained); 184 memoryMode = mode; 185} 186 187bool System::breakpoint() 188{ 189 if (remoteGDB.size()) 190 return remoteGDB[0]->breakpoint(); 191 return false; 192} 193 194/** 195 * Setting rgdb_wait to a positive integer waits for a remote debugger to 196 * connect to that context ID before continuing. This should really 197 be a parameter on the CPU object or something... 198 */ 199int rgdb_wait = -1; 200 201int 202System::registerThreadContext(ThreadContext *tc, int assigned) 203{ 204 int id; 205 if (assigned == -1) { 206 for (id = 0; id < threadContexts.size(); id++) { 207 if (!threadContexts[id]) 208 break; 209 } 210 211 if (threadContexts.size() <= id) 212 threadContexts.resize(id + 1); 213 } else { 214 if (threadContexts.size() <= assigned) 215 threadContexts.resize(assigned + 1); 216 id = assigned; 217 } 218 219 if (threadContexts[id]) 220 fatal("Cannot have two CPUs with the same id (%d)\n", id); 221 222 threadContexts[id] = tc; 223 _numContexts++; 224 225 int port = getRemoteGDBPort(); 226 if (port) { 227 RemoteGDB *rgdb = new RemoteGDB(this, tc); 228 GDBListener *gdbl = new GDBListener(rgdb, port + id); 229 gdbl->listen(); 230 231 if (rgdb_wait != -1 && rgdb_wait == id) 232 gdbl->accept(); 233 234 if (remoteGDB.size() <= id) { 235 remoteGDB.resize(id + 1); 236 } 237 238 remoteGDB[id] = rgdb; 239 } 240 241 activeCpus.push_back(false); 242 243 return id; 244} 245 246int 247System::numRunningContexts() 248{ 249 int running = 0; 250 for (int i = 0; i < _numContexts; ++i) { 251 if (threadContexts[i]->status() != ThreadContext::Halted) 252 ++running; 253 } 254 return running; 255} 256 257void 258System::initState() 259{ 260 int i; 261 if (FullSystem) { 262 for (i = 0; i < threadContexts.size(); i++) 263 TheISA::startupCPU(threadContexts[i], i); 264 // Moved from the constructor to here since it relies on the 265 // address map being resolved in the interconnect 266 /** 267 * Load the kernel code into memory 268 */ 269 if (params()->kernel != "") { 270 // Load program sections into memory 271 kernel->loadSections(physProxy, loadAddrMask); 272 273 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 274 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 275 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 276 DPRINTF(Loader, "Kernel loaded...\n"); 277 } 278 } 279 280 activeCpus.clear(); 281 282 if (!FullSystem) 283 return; 284 285 for (i = 0; i < threadContexts.size(); i++) 286 TheISA::startupCPU(threadContexts[i], i); 287} 288 289void 290System::replaceThreadContext(ThreadContext *tc, int context_id) 291{ 292 if (context_id >= threadContexts.size()) { 293 panic("replaceThreadContext: bad id, %d >= %d\n", 294 context_id, threadContexts.size()); 295 } 296 297 threadContexts[context_id] = tc; 298 if (context_id < remoteGDB.size()) 299 remoteGDB[context_id]->replaceThreadContext(tc); 300} 301 302Addr 303System::allocPhysPages(int npages) 304{ 305 Addr return_addr = pagePtr << LogVMPageSize; 306 pagePtr += npages; 307 if ((pagePtr << LogVMPageSize) > physmem.totalSize()) 308 fatal("Out of memory, please increase size of physical memory."); 309 return return_addr; 310} 311 312Addr 313System::memSize() const 314{ 315 return physmem.totalSize(); 316} 317 318Addr 319System::freeMemSize() const 320{ 321 return physmem.totalSize() - (pagePtr << LogVMPageSize); 322} 323 324bool 325System::isMemAddr(Addr addr) const 326{ 327 return physmem.isMemAddr(addr); 328} 329 330void 331System::resume() 332{ 333 SimObject::resume(); 334 totalNumInsts = 0; 335} 336 337void 338System::serialize(ostream &os) 339{ 340 if (FullSystem) 341 kernelSymtab->serialize("kernel_symtab", os); 342 SERIALIZE_SCALAR(pagePtr); 343 SERIALIZE_SCALAR(nextPID); 344} 345 346 347void 348System::unserialize(Checkpoint *cp, const string §ion) 349{ 350 if (FullSystem) 351 kernelSymtab->unserialize("kernel_symtab", cp, section); 352 UNSERIALIZE_SCALAR(pagePtr); 353 UNSERIALIZE_SCALAR(nextPID); 354} 355 356void 357System::regStats() 358{ 359 for (uint32_t j = 0; j < numWorkIds ; j++) { 360 workItemStats[j] = new Stats::Histogram(); 361 stringstream namestr; 362 ccprintf(namestr, "work_item_type%d", j); 363 workItemStats[j]->init(20) 364 .name(name() + "." + namestr.str()) 365 .desc("Run time stat for" + namestr.str()) 366 .prereq(*workItemStats[j]); 367 } 368} 369 370void 371System::workItemEnd(uint32_t tid, uint32_t workid) 372{ 373 std::pair<uint32_t,uint32_t> p(tid, workid); 374 if (!lastWorkItemStarted.count(p)) 375 return; 376 377 Tick samp = curTick() - lastWorkItemStarted[p]; 378 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 379 380 if (workid >= numWorkIds) 381 fatal("Got workid greater than specified in system configuration\n"); 382 383 workItemStats[workid]->sample(samp); 384 lastWorkItemStarted.erase(p); 385} 386 387void 388System::printSystems() 389{ 390 vector<System *>::iterator i = systemList.begin(); 391 vector<System *>::iterator end = systemList.end(); 392 for (; i != end; ++i) { 393 System *sys = *i; 394 cerr << "System " << sys->name() << ": " << hex << sys << endl; 395 } 396} 397 398void 399printSystems() 400{ 401 System::printSystems(); 402} 403 404MasterID 405System::getMasterId(std::string master_name) 406{ 407 // strip off system name if the string starts with it 408 if (startswith(master_name, name())) 409 master_name = master_name.erase(0, name().size() + 1); 410 411 // CPUs in switch_cpus ask for ids again after switching 412 for (int i = 0; i < masterIds.size(); i++) { 413 if (masterIds[i] == master_name) { 414 return i; 415 } 416 } 417 418 // Verify that the statistics haven't been enabled yet 419 // Otherwise objects will have sized their stat buckets and 420 // they will be too small 421 422 if (Stats::enabled()) 423 fatal("Can't request a masterId after regStats(). \ 424 You must do so in init().\n"); 425 426 masterIds.push_back(master_name); 427 428 return masterIds.size() - 1; 429} 430 431std::string 432System::getMasterName(MasterID master_id) 433{ 434 if (master_id >= masterIds.size()) 435 fatal("Invalid master_id passed to getMasterName()\n"); 436 437 return masterIds[master_id]; 438} 439 440const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 441 "timing"}; 442 443System * 444SystemParams::create() 445{ 446 return new System(this); 447} 448