1/* 2 * Copyright (c) 2003-2006 The Regents of The University of Michigan 3 * Copyright (c) 2011 Regents of the University of California 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Steve Reinhardt 30 * Lisa Hsu 31 * Nathan Binkert 32 * Ali Saidi 33 * Rick Strong 34 */ 35 36#include "arch/isa_traits.hh" 37#include "arch/remote_gdb.hh" 38#include "arch/utility.hh" 39#include "base/loader/object_file.hh" 40#include "base/loader/symtab.hh" 41#include "base/trace.hh" 42#include "config/full_system.hh" 43#include "config/the_isa.hh" 44#include "cpu/thread_context.hh" 45#include "debug/Loader.hh" 46#include "mem/mem_object.hh" 47#include "mem/physical.hh" 48#include "sim/byteswap.hh" 49#include "sim/debug.hh" 50#include "sim/system.hh" 51 52#if FULL_SYSTEM 53#include "arch/vtophys.hh" 54#include "kern/kernel_stats.hh" 55#include "mem/vport.hh" 56#else 57#include "params/System.hh" 58#endif 59 60using namespace std; 61using namespace TheISA; 62 63vector<System *> System::systemList; 64 65int System::numSystemsRunning = 0; 66 67System::System(Params *p) 68 : SimObject(p), physmem(p->physmem), _numContexts(0), 69#if FULL_SYSTEM 70 init_param(p->init_param), 71 loadAddrMask(p->load_addr_mask), 72#else 73 pagePtr(0), 74 nextPID(0), 75#endif 76 memoryMode(p->mem_mode), 77 workItemsBegin(0), 78 workItemsEnd(0), 79 _params(p), 80 totalNumInsts(0), 81 instEventQueue("system instruction-based event queue") 82{ 83 // add self to global system list 84 systemList.push_back(this); 85
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86 /** Keep track of all memories we can execute code out of 87 * in our system 88 */ 89 for (int x = 0; x < p->memories.size(); x++) { 90 if (!p->memories[x]) 91 continue; 92 memRanges.push_back(RangeSize(p->memories[x]->start(), 93 p->memories[x]->size())); 94 } 95 |
96#if FULL_SYSTEM 97 kernelSymtab = new SymbolTable; 98 if (!debugSymbolTable) 99 debugSymbolTable = new SymbolTable; 100 101 102 /** 103 * Get a functional port to memory 104 */ 105 Port *mem_port; 106 functionalPort = new FunctionalPort(name() + "-fport"); 107 mem_port = physmem->getPort("functional"); 108 functionalPort->setPeer(mem_port); 109 mem_port->setPeer(functionalPort); 110 111 virtPort = new VirtualPort(name() + "-fport"); 112 mem_port = physmem->getPort("functional"); 113 virtPort->setPeer(mem_port); 114 mem_port->setPeer(virtPort); 115 116 117 /** 118 * Load the kernel code into memory 119 */ 120 if (params()->kernel == "") { 121 inform("No kernel set for full system simulation. Assuming you know what" 122 " you're doing...\n"); 123 } else { 124 // Load kernel code 125 kernel = createObjectFile(params()->kernel); 126 inform("kernel located at: %s", params()->kernel); 127 128 if (kernel == NULL) 129 fatal("Could not load kernel file %s", params()->kernel); 130 131 // Load program sections into memory 132 kernel->loadSections(functionalPort, loadAddrMask); 133 134 // setup entry points 135 kernelStart = kernel->textBase(); 136 kernelEnd = kernel->bssBase() + kernel->bssSize(); 137 kernelEntry = kernel->entryPoint(); 138 139 // load symbols 140 if (!kernel->loadGlobalSymbols(kernelSymtab)) 141 fatal("could not load kernel symbols\n"); 142 143 if (!kernel->loadLocalSymbols(kernelSymtab)) 144 fatal("could not load kernel local symbols\n"); 145 146 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 147 fatal("could not load kernel symbols\n"); 148 149 if (!kernel->loadLocalSymbols(debugSymbolTable)) 150 fatal("could not load kernel local symbols\n"); 151 152 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 153 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 154 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 155 DPRINTF(Loader, "Kernel loaded...\n"); 156 } 157#endif // FULL_SYSTEM 158 159 // increment the number of running systms 160 numSystemsRunning++; 161 162 activeCpus.clear(); 163} 164 165System::~System() 166{ 167#if FULL_SYSTEM 168 delete kernelSymtab; 169 delete kernel; 170#else 171 panic("System::fixFuncEventAddr needs to be rewritten " 172 "to work with syscall emulation"); 173#endif // FULL_SYSTEM} 174} 175 176void 177System::setMemoryMode(Enums::MemoryMode mode) 178{ 179 assert(getState() == Drained); 180 memoryMode = mode; 181} 182 183bool System::breakpoint() 184{ 185 if (remoteGDB.size()) 186 return remoteGDB[0]->breakpoint(); 187 return false; 188} 189 190/** 191 * Setting rgdb_wait to a positive integer waits for a remote debugger to 192 * connect to that context ID before continuing. This should really 193 be a parameter on the CPU object or something... 194 */ 195int rgdb_wait = -1; 196 197int 198System::registerThreadContext(ThreadContext *tc, int assigned) 199{ 200 int id; 201 if (assigned == -1) { 202 for (id = 0; id < threadContexts.size(); id++) { 203 if (!threadContexts[id]) 204 break; 205 } 206 207 if (threadContexts.size() <= id) 208 threadContexts.resize(id + 1); 209 } else { 210 if (threadContexts.size() <= assigned) 211 threadContexts.resize(assigned + 1); 212 id = assigned; 213 } 214 215 if (threadContexts[id]) 216 fatal("Cannot have two CPUs with the same id (%d)\n", id); 217 218 threadContexts[id] = tc; 219 _numContexts++; 220 221 int port = getRemoteGDBPort(); 222 if (port) { 223 RemoteGDB *rgdb = new RemoteGDB(this, tc); 224 GDBListener *gdbl = new GDBListener(rgdb, port + id); 225 gdbl->listen(); 226 227 if (rgdb_wait != -1 && rgdb_wait == id) 228 gdbl->accept(); 229 230 if (remoteGDB.size() <= id) { 231 remoteGDB.resize(id + 1); 232 } 233 234 remoteGDB[id] = rgdb; 235 } 236 237 activeCpus.push_back(false); 238 239 return id; 240} 241 242int 243System::numRunningContexts() 244{ 245 int running = 0; 246 for (int i = 0; i < _numContexts; ++i) { 247 if (threadContexts[i]->status() != ThreadContext::Halted) 248 ++running; 249 } 250 return running; 251} 252 253void 254System::initState() 255{ 256#if FULL_SYSTEM 257 int i; 258 for (i = 0; i < threadContexts.size(); i++) 259 TheISA::startupCPU(threadContexts[i], i); 260#endif 261} 262 263void 264System::replaceThreadContext(ThreadContext *tc, int context_id) 265{ 266 if (context_id >= threadContexts.size()) { 267 panic("replaceThreadContext: bad id, %d >= %d\n", 268 context_id, threadContexts.size()); 269 } 270 271 threadContexts[context_id] = tc; 272 if (context_id < remoteGDB.size()) 273 remoteGDB[context_id]->replaceThreadContext(tc); 274} 275 276#if !FULL_SYSTEM 277Addr 278System::new_page() 279{ 280 Addr return_addr = pagePtr << LogVMPageSize; 281 ++pagePtr; 282 if (return_addr >= physmem->size()) 283 fatal("Out of memory, please increase size of physical memory."); 284 return return_addr; 285} 286 287Addr 288System::memSize() 289{ 290 return physmem->size(); 291} 292 293Addr 294System::freeMemSize() 295{ 296 return physmem->size() - (pagePtr << LogVMPageSize); 297} 298 299#endif 300
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301bool 302System::isMemory(const Addr addr) const 303{ 304 std::list<Range<Addr> >::const_iterator i; 305 for (i = memRanges.begin(); i != memRanges.end(); i++) { 306 if (*i == addr) 307 return true; 308 } 309 return false; 310} 311 |
312void 313System::resume() 314{ 315 SimObject::resume(); 316 totalNumInsts = 0; 317} 318 319void 320System::serialize(ostream &os) 321{ 322#if FULL_SYSTEM 323 kernelSymtab->serialize("kernel_symtab", os); 324#else // !FULL_SYSTEM 325 SERIALIZE_SCALAR(pagePtr); 326 SERIALIZE_SCALAR(nextPID); 327#endif 328} 329 330 331void 332System::unserialize(Checkpoint *cp, const string §ion) 333{ 334#if FULL_SYSTEM 335 kernelSymtab->unserialize("kernel_symtab", cp, section); 336#else // !FULL_SYSTEM 337 UNSERIALIZE_SCALAR(pagePtr); 338 UNSERIALIZE_SCALAR(nextPID); 339#endif 340} 341 342void 343System::printSystems() 344{ 345 vector<System *>::iterator i = systemList.begin(); 346 vector<System *>::iterator end = systemList.end(); 347 for (; i != end; ++i) { 348 System *sys = *i; 349 cerr << "System " << sys->name() << ": " << hex << sys << endl; 350 } 351} 352 353void 354printSystems() 355{ 356 System::printSystems(); 357} 358 359const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 360 "timing"}; 361 362#if !FULL_SYSTEM 363 364System * 365SystemParams::create() 366{ 367 return new System(this); 368} 369 370#endif
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