system.cc revision 8813
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 init_param(p->init_param), 81 loadAddrMask(p->load_addr_mask), 82 nextPID(0), 83 memoryMode(p->mem_mode), 84 workItemsBegin(0), 85 workItemsEnd(0), 86 numWorkIds(p->num_work_ids), 87 _params(p), 88 totalNumInsts(0), 89 instEventQueue("system instruction-based event queue") 90{ 91 // add self to global system list 92 systemList.push_back(this); 93 94 /** Keep track of all memories we can execute code out of 95 * in our system 96 */ 97 for (int x = 0; x < p->memories.size(); x++) { 98 if (!p->memories[x]) 99 continue; 100 memRanges.push_back(RangeSize(p->memories[x]->start(), 101 p->memories[x]->size())); 102 } 103 104 if (FullSystem) { 105 kernelSymtab = new SymbolTable; 106 if (!debugSymbolTable) 107 debugSymbolTable = new SymbolTable; 108 109 /** 110 * Get a port proxy to memory 111 */ 112 physProxy = new PortProxy(*getSystemPort()); 113 virtProxy = new FSTranslatingPortProxy(*getSystemPort()); 114 } 115} 116 117System::~System() 118{ 119 delete kernelSymtab; 120 delete kernel; 121 122 for (uint32_t j = 0; j < numWorkIds; j++) 123 delete workItemStats[j]; 124} 125 126void 127System::init() 128{ 129 // check that the system port is connected 130 if (!_systemPort.isConnected()) 131 panic("System port on %s is not connected.\n", name()); 132} 133 134Port* 135System::getPort(const std::string &if_name, int idx) 136{ 137 // no need to distinguish at the moment (besides checking) 138 return &_systemPort; 139} 140 141void 142System::setMemoryMode(Enums::MemoryMode mode) 143{ 144 assert(getState() == Drained); 145 memoryMode = mode; 146} 147 148bool System::breakpoint() 149{ 150 if (remoteGDB.size()) 151 return remoteGDB[0]->breakpoint(); 152 return false; 153} 154 155/** 156 * Setting rgdb_wait to a positive integer waits for a remote debugger to 157 * connect to that context ID before continuing. This should really 158 be a parameter on the CPU object or something... 159 */ 160int rgdb_wait = -1; 161 162int 163System::registerThreadContext(ThreadContext *tc, int assigned) 164{ 165 int id; 166 if (assigned == -1) { 167 for (id = 0; id < threadContexts.size(); id++) { 168 if (!threadContexts[id]) 169 break; 170 } 171 172 if (threadContexts.size() <= id) 173 threadContexts.resize(id + 1); 174 } else { 175 if (threadContexts.size() <= assigned) 176 threadContexts.resize(assigned + 1); 177 id = assigned; 178 } 179 180 if (threadContexts[id]) 181 fatal("Cannot have two CPUs with the same id (%d)\n", id); 182 183 threadContexts[id] = tc; 184 _numContexts++; 185 186 int port = getRemoteGDBPort(); 187 if (port) { 188 RemoteGDB *rgdb = new RemoteGDB(this, tc); 189 GDBListener *gdbl = new GDBListener(rgdb, port + id); 190 gdbl->listen(); 191 192 if (rgdb_wait != -1 && rgdb_wait == id) 193 gdbl->accept(); 194 195 if (remoteGDB.size() <= id) { 196 remoteGDB.resize(id + 1); 197 } 198 199 remoteGDB[id] = rgdb; 200 } 201 202 activeCpus.push_back(false); 203 204 return id; 205} 206 207int 208System::numRunningContexts() 209{ 210 int running = 0; 211 for (int i = 0; i < _numContexts; ++i) { 212 if (threadContexts[i]->status() != ThreadContext::Halted) 213 ++running; 214 } 215 return running; 216} 217 218void 219System::initState() 220{ 221 int i; 222 if (FullSystem) { 223 for (i = 0; i < threadContexts.size(); i++) 224 TheISA::startupCPU(threadContexts[i], i); 225 // Moved from the constructor to here since it relies on the 226 // address map being resolved in the interconnect 227 /** 228 * Load the kernel code into memory 229 */ 230 if (params()->kernel == "") { 231 inform("No kernel set for full system simulation. " 232 "Assuming you know what you're doing...\n"); 233 } else { 234 // Load kernel code 235 kernel = createObjectFile(params()->kernel); 236 inform("kernel located at: %s", params()->kernel); 237 238 if (kernel == NULL) 239 fatal("Could not load kernel file %s", params()->kernel); 240 241 // Load program sections into memory 242 kernel->loadSections(physProxy, loadAddrMask); 243 244 // setup entry points 245 kernelStart = kernel->textBase(); 246 kernelEnd = kernel->bssBase() + kernel->bssSize(); 247 kernelEntry = kernel->entryPoint(); 248 249 // load symbols 250 if (!kernel->loadGlobalSymbols(kernelSymtab)) 251 fatal("could not load kernel symbols\n"); 252 253 if (!kernel->loadLocalSymbols(kernelSymtab)) 254 fatal("could not load kernel local symbols\n"); 255 256 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 257 fatal("could not load kernel symbols\n"); 258 259 if (!kernel->loadLocalSymbols(debugSymbolTable)) 260 fatal("could not load kernel local symbols\n"); 261 262 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 263 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 264 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 265 DPRINTF(Loader, "Kernel loaded...\n"); 266 } 267 } 268 269 // increment the number of running systms 270 numSystemsRunning++; 271 272 activeCpus.clear(); 273 274 if (!FullSystem) 275 return; 276 277 for (i = 0; i < threadContexts.size(); i++) 278 TheISA::startupCPU(threadContexts[i], i); 279} 280 281void 282System::replaceThreadContext(ThreadContext *tc, int context_id) 283{ 284 if (context_id >= threadContexts.size()) { 285 panic("replaceThreadContext: bad id, %d >= %d\n", 286 context_id, threadContexts.size()); 287 } 288 289 threadContexts[context_id] = tc; 290 if (context_id < remoteGDB.size()) 291 remoteGDB[context_id]->replaceThreadContext(tc); 292} 293 294Addr 295System::allocPhysPages(int npages) 296{ 297 Addr return_addr = pagePtr << LogVMPageSize; 298 pagePtr += npages; 299 if (pagePtr > physmem->size()) 300 fatal("Out of memory, please increase size of physical memory."); 301 return return_addr; 302} 303 304Addr 305System::memSize() 306{ 307 return physmem->size(); 308} 309 310Addr 311System::freeMemSize() 312{ 313 return physmem->size() - (pagePtr << LogVMPageSize); 314} 315 316bool 317System::isMemory(const Addr addr) const 318{ 319 std::list<Range<Addr> >::const_iterator i; 320 for (i = memRanges.begin(); i != memRanges.end(); i++) { 321 if (*i == addr) 322 return true; 323 } 324 return false; 325} 326 327void 328System::resume() 329{ 330 SimObject::resume(); 331 totalNumInsts = 0; 332} 333 334void 335System::serialize(ostream &os) 336{ 337 if (FullSystem) 338 kernelSymtab->serialize("kernel_symtab", os); 339 SERIALIZE_SCALAR(pagePtr); 340 SERIALIZE_SCALAR(nextPID); 341} 342 343 344void 345System::unserialize(Checkpoint *cp, const string §ion) 346{ 347 if (FullSystem) 348 kernelSymtab->unserialize("kernel_symtab", cp, section); 349 UNSERIALIZE_SCALAR(pagePtr); 350 UNSERIALIZE_SCALAR(nextPID); 351} 352 353void 354System::regStats() 355{ 356 for (uint32_t j = 0; j < numWorkIds ; j++) { 357 workItemStats[j] = new Stats::Histogram(); 358 stringstream namestr; 359 ccprintf(namestr, "work_item_type%d", j); 360 workItemStats[j]->init(20) 361 .name(name() + "." + namestr.str()) 362 .desc("Run time stat for" + namestr.str()) 363 .prereq(*workItemStats[j]); 364 } 365} 366 367void 368System::workItemEnd(uint32_t tid, uint32_t workid) 369{ 370 std::pair<uint32_t,uint32_t> p(tid, workid); 371 if (!lastWorkItemStarted.count(p)) 372 return; 373 374 Tick samp = curTick() - lastWorkItemStarted[p]; 375 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 376 377 if (workid >= numWorkIds) 378 fatal("Got workid greater than specified in system configuration\n"); 379 380 workItemStats[workid]->sample(samp); 381 lastWorkItemStarted.erase(p); 382} 383 384void 385System::printSystems() 386{ 387 vector<System *>::iterator i = systemList.begin(); 388 vector<System *>::iterator end = systemList.end(); 389 for (; i != end; ++i) { 390 System *sys = *i; 391 cerr << "System " << sys->name() << ": " << hex << sys << endl; 392 } 393} 394 395void 396printSystems() 397{ 398 System::printSystems(); 399} 400 401const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 402 "timing"}; 403 404System * 405SystemParams::create() 406{ 407 return new System(this); 408} 409