system.cc revision 8706:b1838faf3bcc
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 "base/loader/object_file.hh" 52#include "base/loader/symtab.hh" 53#include "base/trace.hh" 54#include "config/full_system.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 "mem/mem_object.hh" 60#include "mem/physical.hh" 61#include "sim/byteswap.hh" 62#include "sim/debug.hh" 63#include "sim/system.hh" 64 65#if FULL_SYSTEM 66#include "arch/vtophys.hh" 67#include "kern/kernel_stats.hh" 68#include "mem/fs_translating_port_proxy.hh" 69#else 70#include "params/System.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 physmem(p->physmem), 83 _numContexts(0), 84#if FULL_SYSTEM 85 init_param(p->init_param), 86 loadAddrMask(p->load_addr_mask), 87#else 88 pagePtr(0), 89 nextPID(0), 90#endif 91 memoryMode(p->mem_mode), 92 workItemsBegin(0), 93 workItemsEnd(0), 94 numWorkIds(p->num_work_ids), 95 _params(p), 96 totalNumInsts(0), 97 instEventQueue("system instruction-based event queue") 98{ 99 // add self to global system list 100 systemList.push_back(this); 101 102 /** Keep track of all memories we can execute code out of 103 * in our system 104 */ 105 for (int x = 0; x < p->memories.size(); x++) { 106 if (!p->memories[x]) 107 continue; 108 memRanges.push_back(RangeSize(p->memories[x]->start(), 109 p->memories[x]->size())); 110 } 111 112#if FULL_SYSTEM 113 kernelSymtab = new SymbolTable; 114 if (!debugSymbolTable) 115 debugSymbolTable = new SymbolTable; 116 117 /** 118 * Get a port proxy to memory 119 */ 120 physProxy = new PortProxy(*getSystemPort()); 121 virtProxy = new FSTranslatingPortProxy(*getSystemPort()); 122#endif 123} 124 125System::~System() 126{ 127#if FULL_SYSTEM 128 delete kernelSymtab; 129 delete kernel; 130#else 131 panic("System::fixFuncEventAddr needs to be rewritten " 132 "to work with syscall emulation"); 133#endif // FULL_SYSTEM} 134 135 for (uint32_t j = 0; j < numWorkIds; j++) 136 delete workItemStats[j]; 137} 138 139void 140System::init() 141{ 142 // check that the system port is connected 143 if (!_systemPort.isConnected()) 144 panic("System port on %s is not connected.\n", name()); 145} 146 147Port* 148System::getPort(const std::string &if_name, int idx) 149{ 150 // no need to distinguish at the moment (besides checking) 151 return &_systemPort; 152} 153 154void 155System::setMemoryMode(Enums::MemoryMode mode) 156{ 157 assert(getState() == Drained); 158 memoryMode = mode; 159} 160 161bool System::breakpoint() 162{ 163 if (remoteGDB.size()) 164 return remoteGDB[0]->breakpoint(); 165 return false; 166} 167 168/** 169 * Setting rgdb_wait to a positive integer waits for a remote debugger to 170 * connect to that context ID before continuing. This should really 171 be a parameter on the CPU object or something... 172 */ 173int rgdb_wait = -1; 174 175int 176System::registerThreadContext(ThreadContext *tc, int assigned) 177{ 178 int id; 179 if (assigned == -1) { 180 for (id = 0; id < threadContexts.size(); id++) { 181 if (!threadContexts[id]) 182 break; 183 } 184 185 if (threadContexts.size() <= id) 186 threadContexts.resize(id + 1); 187 } else { 188 if (threadContexts.size() <= assigned) 189 threadContexts.resize(assigned + 1); 190 id = assigned; 191 } 192 193 if (threadContexts[id]) 194 fatal("Cannot have two CPUs with the same id (%d)\n", id); 195 196 threadContexts[id] = tc; 197 _numContexts++; 198 199 int port = getRemoteGDBPort(); 200 if (port) { 201 RemoteGDB *rgdb = new RemoteGDB(this, tc); 202 GDBListener *gdbl = new GDBListener(rgdb, port + id); 203 gdbl->listen(); 204 205 if (rgdb_wait != -1 && rgdb_wait == id) 206 gdbl->accept(); 207 208 if (remoteGDB.size() <= id) { 209 remoteGDB.resize(id + 1); 210 } 211 212 remoteGDB[id] = rgdb; 213 } 214 215 activeCpus.push_back(false); 216 217 return id; 218} 219 220int 221System::numRunningContexts() 222{ 223 int running = 0; 224 for (int i = 0; i < _numContexts; ++i) { 225 if (threadContexts[i]->status() != ThreadContext::Halted) 226 ++running; 227 } 228 return running; 229} 230 231void 232System::initState() 233{ 234 // Moved from the constructor to here since it relies on the 235 // address map being resolved in the interconnect 236#if FULL_SYSTEM 237 /** 238 * Load the kernel code into memory 239 */ 240 if (params()->kernel == "") { 241 inform("No kernel set for full system simulation. Assuming you know what" 242 " you're doing...\n"); 243 } else { 244 // Load kernel code 245 kernel = createObjectFile(params()->kernel); 246 inform("kernel located at: %s", params()->kernel); 247 248 if (kernel == NULL) 249 fatal("Could not load kernel file %s", params()->kernel); 250 251 // Load program sections into memory 252 kernel->loadSections(physProxy, loadAddrMask); 253 254 // setup entry points 255 kernelStart = kernel->textBase(); 256 kernelEnd = kernel->bssBase() + kernel->bssSize(); 257 kernelEntry = kernel->entryPoint(); 258 259 // load symbols 260 if (!kernel->loadGlobalSymbols(kernelSymtab)) 261 fatal("could not load kernel symbols\n"); 262 263 if (!kernel->loadLocalSymbols(kernelSymtab)) 264 fatal("could not load kernel local symbols\n"); 265 266 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 267 fatal("could not load kernel symbols\n"); 268 269 if (!kernel->loadLocalSymbols(debugSymbolTable)) 270 fatal("could not load kernel local symbols\n"); 271 272 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 273 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 274 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 275 DPRINTF(Loader, "Kernel loaded...\n"); 276 } 277#endif // FULL_SYSTEM 278 279 // increment the number of running systms 280 numSystemsRunning++; 281 282 activeCpus.clear(); 283 284#if FULL_SYSTEM 285 int i; 286 for (i = 0; i < threadContexts.size(); i++) 287 TheISA::startupCPU(threadContexts[i], i); 288#endif 289} 290 291void 292System::replaceThreadContext(ThreadContext *tc, int context_id) 293{ 294 if (context_id >= threadContexts.size()) { 295 panic("replaceThreadContext: bad id, %d >= %d\n", 296 context_id, threadContexts.size()); 297 } 298 299 threadContexts[context_id] = tc; 300 if (context_id < remoteGDB.size()) 301 remoteGDB[context_id]->replaceThreadContext(tc); 302} 303 304#if !FULL_SYSTEM 305Addr 306System::allocPhysPages(int npages) 307{ 308 Addr return_addr = pagePtr << LogVMPageSize; 309 pagePtr += npages; 310 if (return_addr >= physmem->size()) 311 fatal("Out of memory, please increase size of physical memory."); 312 return return_addr; 313} 314 315Addr 316System::memSize() 317{ 318 return physmem->size(); 319} 320 321Addr 322System::freeMemSize() 323{ 324 return physmem->size() - (pagePtr << LogVMPageSize); 325} 326 327#endif 328 329bool 330System::isMemory(const Addr addr) const 331{ 332 std::list<Range<Addr> >::const_iterator i; 333 for (i = memRanges.begin(); i != memRanges.end(); i++) { 334 if (*i == addr) 335 return true; 336 } 337 return false; 338} 339 340void 341System::resume() 342{ 343 SimObject::resume(); 344 totalNumInsts = 0; 345} 346 347void 348System::serialize(ostream &os) 349{ 350#if FULL_SYSTEM 351 kernelSymtab->serialize("kernel_symtab", os); 352#else // !FULL_SYSTEM 353 SERIALIZE_SCALAR(pagePtr); 354 SERIALIZE_SCALAR(nextPID); 355#endif 356} 357 358 359void 360System::unserialize(Checkpoint *cp, const string §ion) 361{ 362#if FULL_SYSTEM 363 kernelSymtab->unserialize("kernel_symtab", cp, section); 364#else // !FULL_SYSTEM 365 UNSERIALIZE_SCALAR(pagePtr); 366 UNSERIALIZE_SCALAR(nextPID); 367#endif 368} 369 370void 371System::regStats() 372{ 373 for (uint32_t j = 0; j < numWorkIds ; j++) { 374 workItemStats[j] = new Stats::Histogram(); 375 stringstream namestr; 376 ccprintf(namestr, "work_item_type%d", j); 377 workItemStats[j]->init(20) 378 .name(name() + "." + namestr.str()) 379 .desc("Run time stat for" + namestr.str()) 380 .prereq(*workItemStats[j]); 381 } 382} 383 384void 385System::workItemEnd(uint32_t tid, uint32_t workid) 386{ 387 std::pair<uint32_t,uint32_t> p(tid, workid); 388 if (!lastWorkItemStarted.count(p)) 389 return; 390 391 Tick samp = curTick() - lastWorkItemStarted[p]; 392 DPRINTF(WorkItems, "Work item end: %d\t%d\t%lld\n", tid, workid, samp); 393 394 if (workid >= numWorkIds) 395 fatal("Got workid greater than specified in system configuration\n"); 396 397 workItemStats[workid]->sample(samp); 398 lastWorkItemStarted.erase(p); 399} 400 401void 402System::printSystems() 403{ 404 vector<System *>::iterator i = systemList.begin(); 405 vector<System *>::iterator end = systemList.end(); 406 for (; i != end; ++i) { 407 System *sys = *i; 408 cerr << "System " << sys->name() << ": " << hex << sys << endl; 409 } 410} 411 412void 413printSystems() 414{ 415 System::printSystems(); 416} 417 418const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 419 "timing"}; 420 421#if !FULL_SYSTEM 422 423System * 424SystemParams::create() 425{ 426 return new System(this); 427} 428 429#endif 430