system.cc revision 11522:348411ec525a
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 "mem/abstract_mem.hh" 58#include "mem/physical.hh" 59#include "params/System.hh" 60#include "sim/byteswap.hh" 61#include "sim/debug.hh" 62#include "sim/full_system.hh" 63#include "sim/system.hh" 64 65/** 66 * To avoid linking errors with LTO, only include the header if we 67 * actually have a definition. 68 */ 69#if THE_ISA != NULL_ISA 70#include "kern/kernel_stats.hh" 71#endif 72 73using namespace std; 74using namespace TheISA; 75 76vector<System *> System::systemList; 77 78int System::numSystemsRunning = 0; 79 80System::System(Params *p) 81 : MemObject(p), _systemPort("system_port", this), 82 _numContexts(0), 83 multiThread(p->multi_thread), 84 pagePtr(0), 85 init_param(p->init_param), 86 physProxy(_systemPort, p->cache_line_size), 87 kernelSymtab(nullptr), 88 kernel(nullptr), 89 loadAddrMask(p->load_addr_mask), 90 loadAddrOffset(p->load_offset), 91 nextPID(0), 92 physmem(name() + ".physmem", p->memories, p->mmap_using_noreserve), 93 memoryMode(p->mem_mode), 94 _cacheLineSize(p->cache_line_size), 95 workItemsBegin(0), 96 workItemsEnd(0), 97 numWorkIds(p->num_work_ids), 98 thermalModel(p->thermal_model), 99 _params(p), 100 totalNumInsts(0), 101 instEventQueue("system instruction-based event queue") 102{ 103 // add self to global system list 104 systemList.push_back(this); 105 106 if (FullSystem) { 107 kernelSymtab = new SymbolTable; 108 if (!debugSymbolTable) 109 debugSymbolTable = new SymbolTable; 110 } 111 112 // check if the cache line size is a value known to work 113 if (!(_cacheLineSize == 16 || _cacheLineSize == 32 || 114 _cacheLineSize == 64 || _cacheLineSize == 128)) 115 warn_once("Cache line size is neither 16, 32, 64 nor 128 bytes.\n"); 116 117 // Get the generic system master IDs 118 MasterID tmp_id M5_VAR_USED; 119 tmp_id = getMasterId("writebacks"); 120 assert(tmp_id == Request::wbMasterId); 121 tmp_id = getMasterId("functional"); 122 assert(tmp_id == Request::funcMasterId); 123 tmp_id = getMasterId("interrupt"); 124 assert(tmp_id == Request::intMasterId); 125 126 if (FullSystem) { 127 if (params()->kernel == "") { 128 inform("No kernel set for full system simulation. " 129 "Assuming you know what you're doing\n"); 130 } else { 131 // Get the kernel code 132 kernel = createObjectFile(params()->kernel); 133 inform("kernel located at: %s", params()->kernel); 134 135 if (kernel == NULL) 136 fatal("Could not load kernel file %s", params()->kernel); 137 138 // setup entry points 139 kernelStart = kernel->textBase(); 140 kernelEnd = kernel->bssBase() + kernel->bssSize(); 141 kernelEntry = kernel->entryPoint(); 142 143 // load symbols 144 if (!kernel->loadGlobalSymbols(kernelSymtab)) 145 fatal("could not load kernel symbols\n"); 146 147 if (!kernel->loadLocalSymbols(kernelSymtab)) 148 fatal("could not load kernel local symbols\n"); 149 150 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 151 fatal("could not load kernel symbols\n"); 152 153 if (!kernel->loadLocalSymbols(debugSymbolTable)) 154 fatal("could not load kernel local symbols\n"); 155 156 // Loading only needs to happen once and after memory system is 157 // connected so it will happen in initState() 158 } 159 } 160 161 // increment the number of running systms 162 numSystemsRunning++; 163 164 // Set back pointers to the system in all memories 165 for (int x = 0; x < params()->memories.size(); x++) 166 params()->memories[x]->system(this); 167} 168 169System::~System() 170{ 171 delete kernelSymtab; 172 delete kernel; 173 174 for (uint32_t j = 0; j < numWorkIds; j++) 175 delete workItemStats[j]; 176} 177 178void 179System::init() 180{ 181 // check that the system port is connected 182 if (!_systemPort.isConnected()) 183 panic("System port on %s is not connected.\n", name()); 184} 185 186BaseMasterPort& 187System::getMasterPort(const std::string &if_name, PortID idx) 188{ 189 // no need to distinguish at the moment (besides checking) 190 return _systemPort; 191} 192 193void 194System::setMemoryMode(Enums::MemoryMode mode) 195{ 196 assert(drainState() == DrainState::Drained); 197 memoryMode = mode; 198} 199 200bool System::breakpoint() 201{ 202 if (remoteGDB.size()) 203 return remoteGDB[0]->breakpoint(); 204 return false; 205} 206 207/** 208 * Setting rgdb_wait to a positive integer waits for a remote debugger to 209 * connect to that context ID before continuing. This should really 210 be a parameter on the CPU object or something... 211 */ 212int rgdb_wait = -1; 213 214ContextID 215System::registerThreadContext(ThreadContext *tc, ContextID assigned) 216{ 217 int id; 218 if (assigned == InvalidContextID) { 219 for (id = 0; id < threadContexts.size(); id++) { 220 if (!threadContexts[id]) 221 break; 222 } 223 224 if (threadContexts.size() <= id) 225 threadContexts.resize(id + 1); 226 } else { 227 if (threadContexts.size() <= assigned) 228 threadContexts.resize(assigned + 1); 229 id = assigned; 230 } 231 232 if (threadContexts[id]) 233 fatal("Cannot have two CPUs with the same id (%d)\n", id); 234 235 threadContexts[id] = tc; 236 _numContexts++; 237 238#if THE_ISA != NULL_ISA 239 int port = getRemoteGDBPort(); 240 if (port) { 241 RemoteGDB *rgdb = new RemoteGDB(this, tc); 242 GDBListener *gdbl = new GDBListener(rgdb, port + id); 243 gdbl->listen(); 244 245 if (rgdb_wait != -1 && rgdb_wait == id) 246 gdbl->accept(); 247 248 if (remoteGDB.size() <= id) { 249 remoteGDB.resize(id + 1); 250 } 251 252 remoteGDB[id] = rgdb; 253 } 254#endif 255 256 activeCpus.push_back(false); 257 258 return id; 259} 260 261int 262System::numRunningContexts() 263{ 264 int running = 0; 265 for (int i = 0; i < _numContexts; ++i) { 266 if (threadContexts[i]->status() != ThreadContext::Halted) 267 ++running; 268 } 269 return running; 270} 271 272void 273System::initState() 274{ 275 if (FullSystem) { 276 for (int i = 0; i < threadContexts.size(); i++) 277 TheISA::startupCPU(threadContexts[i], i); 278 // Moved from the constructor to here since it relies on the 279 // address map being resolved in the interconnect 280 /** 281 * Load the kernel code into memory 282 */ 283 if (params()->kernel != "") { 284 if (params()->kernel_addr_check) { 285 // Validate kernel mapping before loading binary 286 if (!(isMemAddr((kernelStart & loadAddrMask) + 287 loadAddrOffset) && 288 isMemAddr((kernelEnd & loadAddrMask) + 289 loadAddrOffset))) { 290 fatal("Kernel is mapped to invalid location (not memory). " 291 "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n", 292 kernelStart, 293 kernelEnd, (kernelStart & loadAddrMask) + 294 loadAddrOffset, 295 (kernelEnd & loadAddrMask) + loadAddrOffset); 296 } 297 } 298 // Load program sections into memory 299 kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset); 300 301 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 302 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 303 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 304 DPRINTF(Loader, "Kernel loaded...\n"); 305 } 306 } 307} 308 309void 310System::replaceThreadContext(ThreadContext *tc, ContextID context_id) 311{ 312 if (context_id >= threadContexts.size()) { 313 panic("replaceThreadContext: bad id, %d >= %d\n", 314 context_id, threadContexts.size()); 315 } 316 317 threadContexts[context_id] = tc; 318 if (context_id < remoteGDB.size()) 319 remoteGDB[context_id]->replaceThreadContext(tc); 320} 321 322Addr 323System::allocPhysPages(int npages) 324{ 325 Addr return_addr = pagePtr << PageShift; 326 pagePtr += npages; 327 328 Addr next_return_addr = pagePtr << PageShift; 329 330 AddrRange m5opRange(0xffff0000, 0xffffffff); 331 if (m5opRange.contains(next_return_addr)) { 332 warn("Reached m5ops MMIO region\n"); 333 return_addr = 0xffffffff; 334 pagePtr = 0xffffffff >> PageShift; 335 } 336 337 if ((pagePtr << PageShift) > physmem.totalSize()) 338 fatal("Out of memory, please increase size of physical memory."); 339 return return_addr; 340} 341 342Addr 343System::memSize() const 344{ 345 return physmem.totalSize(); 346} 347 348Addr 349System::freeMemSize() const 350{ 351 return physmem.totalSize() - (pagePtr << PageShift); 352} 353 354bool 355System::isMemAddr(Addr addr) const 356{ 357 return physmem.isMemAddr(addr); 358} 359 360void 361System::drainResume() 362{ 363 totalNumInsts = 0; 364} 365 366void 367System::serialize(CheckpointOut &cp) const 368{ 369 if (FullSystem) 370 kernelSymtab->serialize("kernel_symtab", cp); 371 SERIALIZE_SCALAR(pagePtr); 372 SERIALIZE_SCALAR(nextPID); 373 serializeSymtab(cp); 374 375 // also serialize the memories in the system 376 physmem.serializeSection(cp, "physmem"); 377} 378 379 380void 381System::unserialize(CheckpointIn &cp) 382{ 383 if (FullSystem) 384 kernelSymtab->unserialize("kernel_symtab", cp); 385 UNSERIALIZE_SCALAR(pagePtr); 386 UNSERIALIZE_SCALAR(nextPID); 387 unserializeSymtab(cp); 388 389 // also unserialize the memories in the system 390 physmem.unserializeSection(cp, "physmem"); 391} 392 393void 394System::regStats() 395{ 396 MemObject::regStats(); 397 398 for (uint32_t j = 0; j < numWorkIds ; j++) { 399 workItemStats[j] = new Stats::Histogram(); 400 stringstream namestr; 401 ccprintf(namestr, "work_item_type%d", j); 402 workItemStats[j]->init(20) 403 .name(name() + "." + namestr.str()) 404 .desc("Run time stat for" + namestr.str()) 405 .prereq(*workItemStats[j]); 406 } 407} 408 409void 410System::workItemEnd(uint32_t tid, uint32_t workid) 411{ 412 std::pair<uint32_t,uint32_t> p(tid, workid); 413 if (!lastWorkItemStarted.count(p)) 414 return; 415 416 Tick samp = curTick() - lastWorkItemStarted[p]; 417 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 418 419 if (workid >= numWorkIds) 420 fatal("Got workid greater than specified in system configuration\n"); 421 422 workItemStats[workid]->sample(samp); 423 lastWorkItemStarted.erase(p); 424} 425 426void 427System::printSystems() 428{ 429 ios::fmtflags flags(cerr.flags()); 430 431 vector<System *>::iterator i = systemList.begin(); 432 vector<System *>::iterator end = systemList.end(); 433 for (; i != end; ++i) { 434 System *sys = *i; 435 cerr << "System " << sys->name() << ": " << hex << sys << endl; 436 } 437 438 cerr.flags(flags); 439} 440 441void 442printSystems() 443{ 444 System::printSystems(); 445} 446 447MasterID 448System::getMasterId(std::string master_name) 449{ 450 // strip off system name if the string starts with it 451 if (startswith(master_name, name())) 452 master_name = master_name.erase(0, name().size() + 1); 453 454 // CPUs in switch_cpus ask for ids again after switching 455 for (int i = 0; i < masterIds.size(); i++) { 456 if (masterIds[i] == master_name) { 457 return i; 458 } 459 } 460 461 // Verify that the statistics haven't been enabled yet 462 // Otherwise objects will have sized their stat buckets and 463 // they will be too small 464 465 if (Stats::enabled()) { 466 fatal("Can't request a masterId after regStats(). " 467 "You must do so in init().\n"); 468 } 469 470 masterIds.push_back(master_name); 471 472 return masterIds.size() - 1; 473} 474 475std::string 476System::getMasterName(MasterID master_id) 477{ 478 if (master_id >= masterIds.size()) 479 fatal("Invalid master_id passed to getMasterName()\n"); 480 481 return masterIds[master_id]; 482} 483 484System * 485SystemParams::create() 486{ 487 return new System(this); 488} 489