system.cc revision 5712
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 "mem/mem_object.hh" 42#include "mem/physical.hh" 43#include "sim/byteswap.hh" 44#include "sim/system.hh" 45#include "sim/debug.hh" 46#if FULL_SYSTEM 47#include "arch/vtophys.hh" 48#include "kern/kernel_stats.hh" 49#else 50#include "params/System.hh" 51#endif 52 53using namespace std; 54using namespace TheISA; 55 56vector<System *> System::systemList; 57 58int System::numSystemsRunning = 0; 59 60System::System(Params *p) 61 : SimObject(p), physmem(p->physmem), numcpus(0), 62#if FULL_SYSTEM 63 init_param(p->init_param), 64 functionalPort(p->name + "-fport"), 65 virtPort(p->name + "-vport"), 66#else 67 page_ptr(0), 68 next_PID(0), 69#endif 70 memoryMode(p->mem_mode), _params(p) 71{ 72 // add self to global system list 73 systemList.push_back(this); 74 75#if FULL_SYSTEM 76 kernelSymtab = new SymbolTable; 77 if (!debugSymbolTable) 78 debugSymbolTable = new SymbolTable; 79 80 81 /** 82 * Get a functional port to memory 83 */ 84 Port *mem_port; 85 mem_port = physmem->getPort("functional"); 86 functionalPort.setPeer(mem_port); 87 mem_port->setPeer(&functionalPort); 88 89 mem_port = physmem->getPort("functional"); 90 virtPort.setPeer(mem_port); 91 mem_port->setPeer(&virtPort); 92 93 94 /** 95 * Load the kernel code into memory 96 */ 97 if (params()->kernel == "") { 98 warn("No kernel set for full system simulation. Assuming you know what" 99 " you're doing...\n"); 100 } else { 101 // Load kernel code 102 kernel = createObjectFile(params()->kernel); 103 warn("kernel located at: %s", params()->kernel); 104 105 if (kernel == NULL) 106 fatal("Could not load kernel file %s", params()->kernel); 107 108 // Load program sections into memory 109 kernel->loadSections(&functionalPort, LoadAddrMask); 110 111 // setup entry points 112 kernelStart = kernel->textBase(); 113 kernelEnd = kernel->bssBase() + kernel->bssSize(); 114 kernelEntry = kernel->entryPoint(); 115 116 // load symbols 117 if (!kernel->loadGlobalSymbols(kernelSymtab)) 118 panic("could not load kernel symbols\n"); 119 120 if (!kernel->loadLocalSymbols(kernelSymtab)) 121 panic("could not load kernel local symbols\n"); 122 123 if (!kernel->loadGlobalSymbols(debugSymbolTable)) 124 panic("could not load kernel symbols\n"); 125 126 if (!kernel->loadLocalSymbols(debugSymbolTable)) 127 panic("could not load kernel local symbols\n"); 128 129 DPRINTF(Loader, "Kernel start = %#x\n", kernelStart); 130 DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd); 131 DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry); 132 DPRINTF(Loader, "Kernel loaded...\n"); 133 } 134#endif // FULL_SYSTEM 135 136 // increment the number of running systms 137 numSystemsRunning++; 138} 139 140System::~System() 141{ 142#if FULL_SYSTEM 143 delete kernelSymtab; 144 delete kernel; 145#else 146 panic("System::fixFuncEventAddr needs to be rewritten " 147 "to work with syscall emulation"); 148#endif // FULL_SYSTEM} 149} 150 151int rgdb_wait = -1; 152int rgdb_enable = true; 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 168int 169System::registerThreadContext(ThreadContext *tc) 170{ 171 int id; 172 for (id = 0; id < threadContexts.size(); id++) { 173 if (!threadContexts[id]) 174 break; 175 } 176 177 if (threadContexts.size() <= id) 178 threadContexts.resize(id + 1); 179 180 if (threadContexts[id]) 181 panic("Cannot have two CPUs with the same id (%d)\n", id); 182 183 threadContexts[id] = tc; 184 numcpus++; 185 186 int port = getRemoteGDBPort(); 187 if (rgdb_enable && port) { 188 RemoteGDB *rgdb = new RemoteGDB(this, tc); 189 GDBListener *gdbl = new GDBListener(rgdb, port + id); 190 gdbl->listen(); 191 /** 192 * Uncommenting this line waits for a remote debugger to 193 * connect to the simulator before continuing. 194 */ 195 if (rgdb_wait != -1 && rgdb_wait == id) 196 gdbl->accept(); 197 198 if (remoteGDB.size() <= id) { 199 remoteGDB.resize(id + 1); 200 } 201 202 remoteGDB[id] = rgdb; 203 } 204 205 return id; 206} 207 208void 209System::startup() 210{ 211 int i; 212 for (i = 0; i < threadContexts.size(); i++) 213 TheISA::startupCPU(threadContexts[i], i); 214} 215 216void 217System::replaceThreadContext(ThreadContext *tc, int id) 218{ 219 if (id >= threadContexts.size()) { 220 panic("replaceThreadContext: bad id, %d >= %d\n", 221 id, threadContexts.size()); 222 } 223 224 threadContexts[id] = tc; 225 if (id < remoteGDB.size()) 226 remoteGDB[id]->replaceThreadContext(tc); 227} 228 229#if !FULL_SYSTEM 230Addr 231System::new_page() 232{ 233 Addr return_addr = page_ptr << LogVMPageSize; 234 ++page_ptr; 235 if (return_addr >= physmem->size()) 236 fatal("Out of memory, please increase size of physical memory."); 237 return return_addr; 238} 239#endif 240 241void 242System::serialize(ostream &os) 243{ 244#if FULL_SYSTEM 245 kernelSymtab->serialize("kernel_symtab", os); 246#else // !FULL_SYSTEM 247 SERIALIZE_SCALAR(page_ptr); 248#endif 249} 250 251 252void 253System::unserialize(Checkpoint *cp, const string §ion) 254{ 255#if FULL_SYSTEM 256 kernelSymtab->unserialize("kernel_symtab", cp, section); 257#else // !FULL_SYSTEM 258 UNSERIALIZE_SCALAR(page_ptr); 259#endif 260} 261 262void 263System::printSystems() 264{ 265 vector<System *>::iterator i = systemList.begin(); 266 vector<System *>::iterator end = systemList.end(); 267 for (; i != end; ++i) { 268 System *sys = *i; 269 cerr << "System " << sys->name() << ": " << hex << sys << endl; 270 } 271} 272 273void 274printSystems() 275{ 276 System::printSystems(); 277} 278 279const char *System::MemoryModeStrings[3] = {"invalid", "atomic", 280 "timing"}; 281 282#if !FULL_SYSTEM 283 284System * 285SystemParams::create() 286{ 287 return new System(this); 288} 289 290#endif 291