src/sim/system.cc

   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 "base/loader/object_file.hh"
  36 #include "base/loader/symtab.hh"
  37 #include "base/trace.hh"
  38 #include "cpu/thread_context.hh"
  39 #include "mem/mem_object.hh"
  40 #include "mem/physical.hh"
  41 #include "sim/builder.hh"
  42 #include "sim/byteswap.hh"
  43 #include "sim/system.hh"
  44 #if FULL_SYSTEM
  45 #include "arch/vtophys.hh"
  46 #include "base/remote_gdb.hh"
  47 #include "kern/kernel_stats.hh"
  48 #endif
  49
  50 using namespace std;
  51 using namespace TheISA;
  52
  53 vector<System *> System::systemList;
  54
  55 int System::numSystemsRunning = 0;
  56
  57 System::System(Params *p)
  58     : SimObject(p->name), physmem(p->physmem), numcpus(0),
  59 #if FULL_SYSTEM
  60       init_param(p->init_param),
  61       functionalPort(p->name + "-fport"),
  62       virtPort(p->name + "-vport"),
  63 #else
  64       page_ptr(0),
  65 #endif
  66       _params(p)
  67 {
  68     // add self to global system list
  69     systemList.push_back(this);
  70
  71 #if FULL_SYSTEM
  72     kernelSymtab = new SymbolTable;
  73     debugSymbolTable = new SymbolTable;
  74
  75
  76     /**
  77      * Get a functional port to memory
  78      */
  79     Port *mem_port;
  80     mem_port = physmem->getPort("functional");
  81     functionalPort.setPeer(mem_port);
  82     mem_port->setPeer(&functionalPort);
  83
  84     mem_port = physmem->getPort("functional");
  85     virtPort.setPeer(mem_port);
  86     mem_port->setPeer(&virtPort);
  87
  88
  89     /**
  90      * Load the kernel code into memory
  91      */
  92     // Load kernel code
  93     kernel = createObjectFile(params()->kernel_path);
  94     if (kernel == NULL)
  95         fatal("Could not load kernel file %s", params()->kernel_path);
  96
  97     // Load program sections into memory
  98     kernel->loadSections(&functionalPort, LoadAddrMask);
  99
 100     // setup entry points
 101     kernelStart = kernel->textBase();
 102     kernelEnd = kernel->bssBase() + kernel->bssSize();
 103     kernelEntry = kernel->entryPoint();
 104
 105     // load symbols
 106     if (!kernel->loadGlobalSymbols(kernelSymtab))
 107         panic("could not load kernel symbols\n");
 108
 109     if (!kernel->loadLocalSymbols(kernelSymtab))
 110         panic("could not load kernel local symbols\n");
 111
 112     if (!kernel->loadGlobalSymbols(debugSymbolTable))
 113         panic("could not load kernel symbols\n");
 114
 115     if (!kernel->loadLocalSymbols(debugSymbolTable))
 116         panic("could not load kernel local symbols\n");
 117
 118     DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
 119     DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
 120     DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
 121     DPRINTF(Loader, "Kernel loaded...\n");
 122
 123     kernelBinning = new Kernel::Binning(this);
 124 #endif // FULL_SYSTEM
 125
 126     // increment the number of running systms
 127     numSystemsRunning++;
 128 }
 129
 130 System::~System()
 131 {
 132 #if FULL_SYSTEM
 133     delete kernelSymtab;
 134     delete kernel;
 135
 136     delete kernelBinning;
 137 #else
 138     panic("System::fixFuncEventAddr needs to be rewritten "
 139           "to work with syscall emulation");
 140 #endif // FULL_SYSTEM}
 141 }
 142
 143 #if FULL_SYSTEM
 144
 145
 146 int rgdb_wait = -1;
 147
 148 #endif // FULL_SYSTEM
 149
 150 int
 151 System::registerThreadContext(ThreadContext *tc, int id)
 152 {
 153     if (id == -1) {
 154         for (id = 0; id < threadContexts.size(); id++) {
 155             if (!threadContexts[id])
 156                 break;
 157         }
 158     }
 159
 160     if (threadContexts.size() <= id)
 161         threadContexts.resize(id + 1);
 162
 163     if (threadContexts[id])
 164         panic("Cannot have two CPUs with the same id (%d)\n", id);
 165
 166     threadContexts[id] = tc;
 167     numcpus++;
 168
 169 #if FULL_SYSTEM
 170     RemoteGDB *rgdb = new RemoteGDB(this, tc);
 171     GDBListener *gdbl = new GDBListener(rgdb, 7000 + id);
 172     gdbl->listen();
 173     /**
 174      * Uncommenting this line waits for a remote debugger to connect
 175      * to the simulator before continuing.
 176      */
 177     if (rgdb_wait != -1 && rgdb_wait == id)
 178         gdbl->accept();
 179
 180     if (remoteGDB.size() <= id) {
 181         remoteGDB.resize(id + 1);
 182     }
 183
 184     remoteGDB[id] = rgdb;
 185 #endif // FULL_SYSTEM
 186
 187     return id;
 188 }
 189
 190 void
 191 System::startup()
 192 {
 193     int i;
 194     for (i = 0; i < threadContexts.size(); i++)
 195         threadContexts[i]->activate(0);
 196 }
 197
 198 void
 199 System::replaceThreadContext(ThreadContext *tc, int id)
 200 {
 201     if (id >= threadContexts.size()) {
 202         panic("replaceThreadContext: bad id, %d >= %d\n",
 203               id, threadContexts.size());
 204     }
 205
 206     threadContexts[id] = tc;
 207 #if FULL_SYSTEM
 208     remoteGDB[id]->replaceThreadContext(tc);
 209 #endif // FULL_SYSTEM
 210 }
 211
 212 #if !FULL_SYSTEM
 213 Addr
 214 System::new_page()
 215 {
 216     Addr return_addr = page_ptr << LogVMPageSize;
 217     ++page_ptr;
 218     return return_addr;
 219 }
 220 #endif
 221
 222 void
 223 System::regStats()
 224 {
 225 #if FULL_SYSTEM
 226     kernelBinning->regStats(name() + ".kern");
 227 #endif // FULL_SYSTEM
 228 }
 229
 230 void
 231 System::serialize(ostream &os)
 232 {
 233 #if FULL_SYSTEM
 234     kernelBinning->serialize(os);
 235
 236     kernelSymtab->serialize("kernel_symtab", os);
 237 #endif // FULL_SYSTEM
 238 }
 239
 240
 241 void
 242 System::unserialize(Checkpoint *cp, const string &section)
 243 {
 244 #if FULL_SYSTEM
 245     kernelBinning->unserialize(cp, section);
 246
 247     kernelSymtab->unserialize("kernel_symtab", cp, section);
 248 #endif // FULL_SYSTEM
 249 }
 250
 251 void
 252 System::printSystems()
 253 {
 254     vector<System *>::iterator i = systemList.begin();
 255     vector<System *>::iterator end = systemList.end();
 256     for (; i != end; ++i) {
 257         System *sys = *i;
 258         cerr << "System " << sys->name() << ": " << hex << sys << endl;
 259     }
 260 }
 261
 262 extern "C"
 263 void
 264 printSystems()
 265 {
 266     System::printSystems();
 267 }
 268
 269 #if FULL_SYSTEM
 270
 271 // In full system mode, only derived classes (e.g. AlphaLinuxSystem)
 272 // can be created directly.
 273
 274 DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
 275
 276 #else
 277
 278 BEGIN_DECLARE_SIM_OBJECT_PARAMS(System)
 279
 280     SimObjectParam<PhysicalMemory *> physmem;
 281
 282 END_DECLARE_SIM_OBJECT_PARAMS(System)
 283
 284 BEGIN_INIT_SIM_OBJECT_PARAMS(System)
 285
 286     INIT_PARAM(physmem, "physical memory")
 287
 288 END_INIT_SIM_OBJECT_PARAMS(System)
 289
 290 CREATE_SIM_OBJECT(System)
 291 {
 292     System::Params *p = new System::Params;
 293     p->name = getInstanceName();
 294     p->physmem = physmem;
 295     return new System(p);
 296 }
 297
 298 REGISTER_SIM_OBJECT("System", System)
 299
 300 #endif