system.cc revision 7650
1/* 2 * Copyright (c) 2003-2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Reinhardt 29 * Lisa Hsu 30 * Nathan Binkert 31 * Ali Saidi 32 */ 33 34#include "arch/isa_traits.hh" 35#include "arch/remote_gdb.hh" 36#include "arch/utility.hh" 37#include "base/loader/object_file.hh" 38#include "base/loader/symtab.hh" 39#include "base/trace.hh" 40#include "cpu/thread_context.hh" 41#include "config/full_system.hh" 42#include "config/the_isa.hh" 43#include "mem/mem_object.hh" 44#include "mem/physical.hh" 45#include "sim/byteswap.hh" 46#include "sim/system.hh" 47#include "sim/debug.hh" 48 49#if FULL_SYSTEM 50#include "arch/vtophys.hh" 51#include "kern/kernel_stats.hh" 52#else 53#include "params/System.hh" 54#endif 55 56using namespace std; 57using namespace TheISA; 58 59vector<System *> System::systemList; 60 61int System::numSystemsRunning = 0; 62 63System::System(Params *p) 64 : SimObject(p), physmem(p->physmem), _numContexts(0), 65#if FULL_SYSTEM 66 init_param(p->init_param), 67 functionalPort(p->name + "-fport"), 68 virtPort(p->name + "-vport"), 69 loadAddrMask(p->load_addr_mask), 70#else 71 page_ptr(0), 72 next_PID(0), 73#endif 74 memoryMode(p->mem_mode), _params(p) 75{ 76 // add self to global system list 77 systemList.push_back(this); 78 79#if FULL_SYSTEM 80 kernelSymtab = new SymbolTable; 81 if (!debugSymbolTable) 82 debugSymbolTable = new SymbolTable; 83 84 85 /** 86 * Get a functional port to memory 87 */ 88 Port *mem_port; 89 mem_port = physmem->getPort("functional"); 90 functionalPort.setPeer(mem_port); 91 mem_port->setPeer(&functionalPort); 92 93 mem_port = physmem->getPort("functional"); 94 virtPort.setPeer(mem_port); 95 mem_port->setPeer(&virtPort); 96 97 98 /** 99 * Load the kernel code into memory 100 */ 101 if (params()->kernel == "") { 102 inform("No kernel set for full system simulation. Assuming you know what" 103 " you're doing...\n"); 104 } else { 105 // Load kernel code 106 kernel = createObjectFile(params()->kernel); 107 inform("kernel located at: %s", params()->kernel); 108 109 if (kernel == NULL) 110 fatal("Could not load kernel file %s", params()->kernel); 111 112 // Load program sections into memory 113 kernel->loadSections(&functionalPort, loadAddrMask); 114 115 // setup entry points 116 kernelStart = kernel->textBase(); 117 kernelEnd = kernel->bssBase() + kernel->bssSize(); 118 kernelEntry = kernel->entryPoint(); 119 120 // load symbols 121 if (!kernel->loadGlobalSymbols(kernelSymtab)) 122 fatal("could not load kernel symbols\n"); 123 124 if (!kernel->loadLocalSymbols(kernelSymtab)) 125 fatal("could not load kernel local symbols\n"); 126 127 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 128 fatal("could not load kernel symbols\n"); 129 130 if (!kernel->loadLocalSymbols(debugSymbolTable)) 131 fatal("could not load kernel local symbols\n"); 132 133 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 134 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 135 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 136 DPRINTF(Loader, "Kernel loaded...\n"); 137 } 138#endif // FULL_SYSTEM 139 140 // increment the number of running systms 141 numSystemsRunning++; 142} 143 144System::~System() 145{ 146#if FULL_SYSTEM 147 delete kernelSymtab; 148 delete kernel; 149#else 150 panic("System::fixFuncEventAddr needs to be rewritten " 151 "to work with syscall emulation"); 152#endif // FULL_SYSTEM} 153} 154 155void 156System::setMemoryMode(Enums::MemoryMode mode) 157{ 158 assert(getState() == Drained); 159 memoryMode = mode; 160} 161 162bool System::breakpoint() 163{ 164 if (remoteGDB.size()) 165 return remoteGDB[0]->breakpoint(); 166 return false; 167} 168 169/** 170 * Setting rgdb_wait to a positive integer waits for a remote debugger to 171 * connect to that context ID before continuing. This should really 172 be a parameter on the CPU object or something... 173 */ 174int rgdb_wait = -1; 175 176int 177System::registerThreadContext(ThreadContext *tc, int assigned) 178{ 179 int id; 180 if (assigned == -1) { 181 for (id = 0; id < threadContexts.size(); id++) { 182 if (!threadContexts[id]) 183 break; 184 } 185 186 if (threadContexts.size() <= id) 187 threadContexts.resize(id + 1); 188 } else { 189 if (threadContexts.size() <= assigned) 190 threadContexts.resize(assigned + 1); 191 id = assigned; 192 } 193 194 if (threadContexts[id]) 195 fatal("Cannot have two CPUs with the same id (%d)\n", id); 196 197 threadContexts[id] = tc; 198 _numContexts++; 199 200 int port = getRemoteGDBPort(); 201 if (port) { 202 RemoteGDB *rgdb = new RemoteGDB(this, tc); 203 GDBListener *gdbl = new GDBListener(rgdb, port + id); 204 gdbl->listen(); 205 206 if (rgdb_wait != -1 && rgdb_wait == id) 207 gdbl->accept(); 208 209 if (remoteGDB.size() <= id) { 210 remoteGDB.resize(id + 1); 211 } 212 213 remoteGDB[id] = rgdb; 214 } 215 216 return id; 217} 218 219int 220System::numRunningContexts() 221{ 222 int running = 0; 223 for (int i = 0; i < _numContexts; ++i) { 224 if (threadContexts[i]->status() != ThreadContext::Halted) 225 ++running; 226 } 227 return running; 228} 229 230void 231System::startup() 232{ 233#if FULL_SYSTEM 234 int i; 235 for (i = 0; i < threadContexts.size(); i++) 236 TheISA::startupCPU(threadContexts[i], i); 237#endif 238} 239 240void 241System::replaceThreadContext(ThreadContext *tc, int context_id) 242{ 243 if (context_id >= threadContexts.size()) { 244 panic("replaceThreadContext: bad id, %d >= %d\n", 245 context_id, threadContexts.size()); 246 } 247 248 threadContexts[context_id] = tc; 249 if (context_id < remoteGDB.size()) 250 remoteGDB[context_id]->replaceThreadContext(tc); 251} 252 253#if !FULL_SYSTEM 254Addr 255System::new_page() 256{ 257 Addr return_addr = page_ptr << LogVMPageSize; 258 ++page_ptr; 259 if (return_addr >= physmem->size()) 260 fatal("Out of memory, please increase size of physical memory."); 261 return return_addr; 262} 263 264Addr 265System::memSize() 266{ 267 return physmem->size(); 268} 269 270Addr 271System::freeMemSize() 272{ 273 return physmem->size() - (page_ptr << LogVMPageSize); 274} 275 276#endif 277 278void 279System::serialize(ostream &os) 280{ 281#if FULL_SYSTEM 282 kernelSymtab->serialize("kernel_symtab", os); 283#else // !FULL_SYSTEM 284 SERIALIZE_SCALAR(page_ptr); 285#endif 286} 287 288 289void 290System::unserialize(Checkpoint *cp, const string §ion) 291{ 292#if FULL_SYSTEM 293 kernelSymtab->unserialize("kernel_symtab", cp, section); 294#else // !FULL_SYSTEM 295 UNSERIALIZE_SCALAR(page_ptr); 296#endif 297} 298 299void 300System::printSystems() 301{ 302 vector<System *>::iterator i = systemList.begin(); 303 vector<System *>::iterator end = systemList.end(); 304 for (; i != end; ++i) { 305 System *sys = *i; 306 cerr << "System " << sys->name() << ": " << hex << sys << endl; 307 } 308} 309 310void 311printSystems() 312{ 313 System::printSystems(); 314} 315 316const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 317 "timing"}; 318 319#if !FULL_SYSTEM 320 321System * 322SystemParams::create() 323{ 324 return new System(this); 325} 326 327#endif 328