sim/system.cc

   1 /*
   2  * Copyright (c) 2002-2004 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
  29 #include "base/loader/object_file.hh"
  30 #include "base/loader/symtab.hh"
  31 #include "base/remote_gdb.hh"
  32 #include "cpu/exec_context.hh"
  33 #include "kern/kernel_stats.hh"
  34 #include "mem/functional_mem/memory_control.hh"
  35 #include "mem/functional_mem/physical_memory.hh"
  36 #include "targetarch/vtophys.hh"
  37 #include "sim/param.hh"
  38 #include "sim/system.hh"
  39 #include "base/trace.hh"
  40
  41 using namespace std;
  42
  43 vector<System *> System::systemList;
  44
  45 int System::numSystemsRunning = 0;
  46
  47 System::System(Params *p)
  48     : SimObject(p->name), memctrl(p->memctrl), physmem(p->physmem),
  49       init_param(p->init_param), params(p)
  50 {
  51     // add self to global system list
  52     systemList.push_back(this);
  53
  54     kernelSymtab = new SymbolTable;
  55     consoleSymtab = new SymbolTable;
  56     palSymtab = new SymbolTable;
  57     debugSymbolTable = new SymbolTable;
  58
  59     /**
  60      * Load the kernel, pal, and console code into memory
  61      */
  62     // Load kernel code
  63     kernel = createObjectFile(params->kernel_path);
  64     if (kernel == NULL)
  65         fatal("Could not load kernel file %s", params->kernel_path);
  66
  67     // Load Console Code
  68     console = createObjectFile(params->console_path);
  69     if (console == NULL)
  70         fatal("Could not load console file %s", params->console_path);
  71
  72     // Load pal file
  73     pal = createObjectFile(params->palcode);
  74     if (pal == NULL)
  75         fatal("Could not load PALcode file %s", params->palcode);
  76
  77
  78     // Load program sections into memory
  79     pal->loadSections(physmem, true);
  80     console->loadSections(physmem, true);
  81     kernel->loadSections(physmem, true);
  82
  83     // setup entry points
  84     kernelStart = kernel->textBase();
  85     kernelEnd = kernel->bssBase() + kernel->bssSize();
  86     kernelEntry = kernel->entryPoint();
  87
  88     // load symbols
  89     if (!kernel->loadGlobalSymbols(kernelSymtab))
  90         panic("could not load kernel symbols\n");
  91
  92     if (!kernel->loadLocalSymbols(kernelSymtab))
  93         panic("could not load kernel local symbols\n");
  94
  95     if (!console->loadGlobalSymbols(consoleSymtab))
  96         panic("could not load console symbols\n");
  97
  98     if (!pal->loadGlobalSymbols(palSymtab))
  99         panic("could not load pal symbols\n");
 100
 101     if (!pal->loadLocalSymbols(palSymtab))
 102         panic("could not load pal symbols\n");
 103
 104     if (!kernel->loadGlobalSymbols(debugSymbolTable))
 105         panic("could not load kernel symbols\n");
 106
 107     if (!kernel->loadLocalSymbols(debugSymbolTable))
 108         panic("could not load kernel local symbols\n");
 109
 110     if (!console->loadGlobalSymbols(debugSymbolTable))
 111         panic("could not load console symbols\n");
 112
 113     if (!pal->loadGlobalSymbols(debugSymbolTable))
 114         panic("could not load pal symbols\n");
 115
 116     if (!pal->loadLocalSymbols(debugSymbolTable))
 117         panic("could not load pal symbols\n");
 118
 119
 120     DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
 121     DPRINTF(Loader, "Kernel end   = %#x\n", kernelEnd);
 122     DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
 123     DPRINTF(Loader, "Kernel loaded...\n");
 124
 125     Addr addr = 0;
 126 #ifdef DEBUG
 127     consolePanicEvent = new BreakPCEvent(&pcEventQueue, "console panic");
 128     if (consoleSymtab->findAddress("panic", addr))
 129         consolePanicEvent->schedule(addr);
 130 #endif
 131
 132     /**
 133      * Copy the osflags (kernel arguments) into the consoles
 134      * memory. (Presently Linux does not use the console service
 135      * routine to get these command line arguments, but Tru64 and
 136      * others do.)
 137      */
 138     if (consoleSymtab->findAddress("env_booted_osflags", addr)) {
 139         Addr paddr = vtophys(physmem, addr);
 140         char *osflags = (char *)physmem->dma_addr(paddr, sizeof(uint32_t));
 141
 142         if (osflags)
 143               strcpy(osflags, params->boot_osflags.c_str());
 144     }
 145
 146     /**
 147      * Set the hardware reset parameter block system type and revision
 148      * information to Tsunami.
 149      */
 150     if (consoleSymtab->findAddress("xxm_rpb", addr)) {
 151         Addr paddr = vtophys(physmem, addr);
 152         char *hwrpb = (char *)physmem->dma_addr(paddr, sizeof(uint64_t));
 153
 154         if (!hwrpb)
 155             panic("could not translate hwrpb addr\n");
 156
 157         *(uint64_t*)(hwrpb+0x50) = htoa(params->system_type);
 158         *(uint64_t*)(hwrpb+0x58) = htoa(params->system_rev);
 159     } else
 160         panic("could not find hwrpb\n");
 161
 162     // increment the number of running systms
 163     numSystemsRunning++;
 164
 165     kernelBinning = new Kernel::Binning(this);
 166 }
 167
 168 System::~System()
 169 {
 170     delete kernelSymtab;
 171     delete consoleSymtab;
 172     delete kernel;
 173     delete console;
 174     delete pal;
 175
 176     delete kernelBinning;
 177
 178 #ifdef DEBUG
 179     delete consolePanicEvent;
 180 #endif
 181 }
 182
 183 bool
 184 System::breakpoint()
 185 {
 186     return remoteGDB[0]->trap(ALPHA_KENTRY_INT);
 187 }
 188
 189 int
 190 System::registerExecContext(ExecContext *xc)
 191 {
 192     int xcIndex = execContexts.size();
 193     execContexts.push_back(xc);
 194
 195     RemoteGDB *rgdb = new RemoteGDB(this, xc);
 196     GDBListener *gdbl = new GDBListener(rgdb, 7000 + xcIndex);
 197     gdbl->listen();
 198     /**
 199      * Uncommenting this line waits for a remote debugger to connect
 200      * to the simulator before continuing.
 201      */
 202     //gdbl->accept();
 203
 204     if (remoteGDB.size() <= xcIndex) {
 205         remoteGDB.resize(xcIndex+1);
 206     }
 207
 208     remoteGDB[xcIndex] = rgdb;
 209
 210     return xcIndex;
 211 }
 212
 213 void
 214 System::startup()
 215 {
 216     if (!execContexts.empty()) {
 217         // activate with zero delay so that we start ticking right
 218         // away on cycle 0
 219         execContexts[0]->activate(0);
 220     }
 221 }
 222
 223 void
 224 System::replaceExecContext(ExecContext *xc, int xcIndex)
 225 {
 226     if (xcIndex >= execContexts.size()) {
 227         panic("replaceExecContext: bad xcIndex, %d >= %d\n",
 228               xcIndex, execContexts.size());
 229     }
 230
 231     execContexts[xcIndex] = xc;
 232     remoteGDB[xcIndex]->replaceExecContext(xc);
 233 }
 234
 235 void
 236 System::regStats()
 237 {
 238     kernelBinning->regStats(name() + ".kern");
 239 }
 240
 241 void
 242 System::serialize(ostream &os)
 243 {
 244     kernelBinning->serialize(os);
 245 }
 246
 247
 248 void
 249 System::unserialize(Checkpoint *cp, const string &section)
 250 {
 251     kernelBinning->unserialize(cp, section);
 252 }
 253
 254 void
 255 System::printSystems()
 256 {
 257     vector<System *>::iterator i = systemList.begin();
 258     vector<System *>::iterator end = systemList.end();
 259     for (; i != end; ++i) {
 260         System *sys = *i;
 261         cerr << "System " << sys->name() << ": " << hex << sys << endl;
 262     }
 263 }
 264
 265 extern "C"
 266 void
 267 printSystems()
 268 {
 269     System::printSystems();
 270 }
 271
 272 DEFINE_SIM_OBJECT_CLASS_NAME("System", System)
 273