src/cpu/cpu_exec_context.cc

   1 /*
   2  * Copyright (c) 2001-2006 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
  29 #include <string>
  30
  31 #include "arch/isa_traits.hh"
  32 #include "cpu/base.hh"
  33 #include "cpu/cpu_exec_context.hh"
  34 #include "cpu/exec_context.hh"
  35
  36 #if FULL_SYSTEM
  37 #include "base/callback.hh"
  38 #include "base/cprintf.hh"
  39 #include "base/output.hh"
  40 #include "base/trace.hh"
  41 #include "cpu/profile.hh"
  42 #include "kern/kernel_stats.hh"
  43 #include "sim/serialize.hh"
  44 #include "sim/sim_exit.hh"
  45 #include "arch/stacktrace.hh"
  46 #else
  47 #include "sim/process.hh"
  48 #include "sim/system.hh"
  49 #include "mem/translating_port.hh"
  50 #endif
  51
  52 using namespace std;
  53
  54 // constructor
  55 #if FULL_SYSTEM
  56 CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num, System *_sys,
  57                          AlphaITB *_itb, AlphaDTB *_dtb)
  58     : _status(ExecContext::Unallocated), cpu(_cpu), thread_num(_thread_num),
  59       cpu_id(-1), lastActivate(0), lastSuspend(0), system(_sys), itb(_itb),
  60       dtb(_dtb), profile(NULL), quiesceEvent(this), func_exe_inst(0),
  61       storeCondFailures(0)
  62
  63 {
  64     proxy = new ProxyExecContext<CPUExecContext>(this);
  65
  66     regs.clear();
  67
  68     if (cpu->params->profile) {
  69         profile = new FunctionProfile(system->kernelSymtab);
  70         Callback *cb =
  71             new MakeCallback<CPUExecContext,
  72             &CPUExecContext::dumpFuncProfile>(this);
  73         registerExitCallback(cb);
  74     }
  75
  76     // let's fill with a dummy node for now so we don't get a segfault
  77     // on the first cycle when there's no node available.
  78     static ProfileNode dummyNode;
  79     profileNode = &dummyNode;
  80     profilePC = 3;
  81
  82     Port *mem_port;
  83     physPort = new FunctionalPort(csprintf("%s-%d-funcport",
  84                                            cpu->name(), thread_num));
  85     mem_port = system->physmem->getPort("functional");
  86     mem_port->setPeer(physPort);
  87     physPort->setPeer(mem_port);
  88
  89     virtPort = new VirtualPort(csprintf("%s-%d-vport",
  90                                         cpu->name(), thread_num));
  91     mem_port = system->physmem->getPort("functional");
  92     mem_port->setPeer(virtPort);
  93     virtPort->setPeer(mem_port);
  94 }
  95 #else
  96 CPUExecContext::CPUExecContext(BaseCPU *_cpu, int _thread_num,
  97                          Process *_process, int _asid, MemObject* memobj)
  98     : _status(ExecContext::Unallocated),
  99       cpu(_cpu), thread_num(_thread_num), cpu_id(-1), lastActivate(0),
 100       lastSuspend(0), process(_process), asid(_asid),
 101       func_exe_inst(0), storeCondFailures(0)
 102 {
 103     /* Use this port to for syscall emulation writes to memory. */
 104     Port *mem_port;
 105     port = new TranslatingPort(csprintf("%s-%d-funcport",
 106                                         cpu->name(), thread_num),
 107                                process->pTable, false);
 108     mem_port = memobj->getPort("functional");
 109     mem_port->setPeer(port);
 110     port->setPeer(mem_port);
 111
 112     regs.clear();
 113     proxy = new ProxyExecContext<CPUExecContext>(this);
 114 }
 115
 116 CPUExecContext::CPUExecContext(RegFile *regFile)
 117     : cpu(NULL), thread_num(-1), process(NULL), asid(-1),
 118       func_exe_inst(0), storeCondFailures(0)
 119 {
 120     regs = *regFile;
 121     proxy = new ProxyExecContext<CPUExecContext>(this);
 122 }
 123
 124 #endif
 125
 126 CPUExecContext::~CPUExecContext()
 127 {
 128     delete proxy;
 129 }
 130
 131 #if FULL_SYSTEM
 132 void
 133 CPUExecContext::dumpFuncProfile()
 134 {
 135     std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
 136     profile->dump(proxy, *os);
 137 }
 138
 139 CPUExecContext::EndQuiesceEvent::EndQuiesceEvent(CPUExecContext *_cpuXC)
 140     : Event(&mainEventQueue), cpuXC(_cpuXC)
 141 {
 142 }
 143
 144 void
 145 CPUExecContext::EndQuiesceEvent::process()
 146 {
 147     cpuXC->activate();
 148 }
 149
 150 const char*
 151 CPUExecContext::EndQuiesceEvent::description()
 152 {
 153     return "End Quiesce Event.";
 154 }
 155
 156 void
 157 CPUExecContext::profileClear()
 158 {
 159     if (profile)
 160         profile->clear();
 161 }
 162
 163 void
 164 CPUExecContext::profileSample()
 165 {
 166     if (profile)
 167         profile->sample(profileNode, profilePC);
 168 }
 169
 170 #endif
 171
 172 void
 173 CPUExecContext::takeOverFrom(ExecContext *oldContext)
 174 {
 175     // some things should already be set up
 176 #if FULL_SYSTEM
 177     assert(system == oldContext->getSystemPtr());
 178 #else
 179     assert(process == oldContext->getProcessPtr());
 180 #endif
 181
 182     // copy over functional state
 183     _status = oldContext->status();
 184     copyArchRegs(oldContext);
 185     cpu_id = oldContext->readCpuId();
 186 #if !FULL_SYSTEM
 187     func_exe_inst = oldContext->readFuncExeInst();
 188 #endif
 189
 190     storeCondFailures = 0;
 191
 192     oldContext->setStatus(ExecContext::Unallocated);
 193 }
 194
 195 void
 196 CPUExecContext::serialize(ostream &os)
 197 {
 198     SERIALIZE_ENUM(_status);
 199     regs.serialize(os);
 200     // thread_num and cpu_id are deterministic from the config
 201     SERIALIZE_SCALAR(func_exe_inst);
 202     SERIALIZE_SCALAR(inst);
 203
 204 #if FULL_SYSTEM
 205     Tick quiesceEndTick = 0;
 206     if (quiesceEvent.scheduled())
 207         quiesceEndTick = quiesceEvent.when();
 208     SERIALIZE_SCALAR(quiesceEndTick);
 209
 210 #endif
 211 }
 212
 213
 214 void
 215 CPUExecContext::unserialize(Checkpoint *cp, const std::string &section)
 216 {
 217     UNSERIALIZE_ENUM(_status);
 218     regs.unserialize(cp, section);
 219     // thread_num and cpu_id are deterministic from the config
 220     UNSERIALIZE_SCALAR(func_exe_inst);
 221     UNSERIALIZE_SCALAR(inst);
 222
 223 #if FULL_SYSTEM
 224     Tick quiesceEndTick;
 225     UNSERIALIZE_SCALAR(quiesceEndTick);
 226     if (quiesceEndTick)
 227         quiesceEvent.schedule(quiesceEndTick);
 228 #endif
 229 }
 230
 231
 232 void
 233 CPUExecContext::activate(int delay)
 234 {
 235     if (status() == ExecContext::Active)
 236         return;
 237
 238     lastActivate = curTick;
 239
 240     _status = ExecContext::Active;
 241     cpu->activateContext(thread_num, delay);
 242 }
 243
 244 void
 245 CPUExecContext::suspend()
 246 {
 247     if (status() == ExecContext::Suspended)
 248         return;
 249
 250     lastActivate = curTick;
 251     lastSuspend = curTick;
 252 /*
 253 #if FULL_SYSTEM
 254     // Don't change the status from active if there are pending interrupts
 255     if (cpu->check_interrupts()) {
 256         assert(status() == ExecContext::Active);
 257         return;
 258     }
 259 #endif
 260 */
 261     _status = ExecContext::Suspended;
 262     cpu->suspendContext(thread_num);
 263 }
 264
 265 void
 266 CPUExecContext::deallocate()
 267 {
 268     if (status() == ExecContext::Unallocated)
 269         return;
 270
 271     _status = ExecContext::Unallocated;
 272     cpu->deallocateContext(thread_num);
 273 }
 274
 275 void
 276 CPUExecContext::halt()
 277 {
 278     if (status() == ExecContext::Halted)
 279         return;
 280
 281     _status = ExecContext::Halted;
 282     cpu->haltContext(thread_num);
 283 }
 284
 285
 286 void
 287 CPUExecContext::regStats(const string &name)
 288 {
 289 }
 290
 291 void
 292 CPUExecContext::copyArchRegs(ExecContext *xc)
 293 {
 294     TheISA::copyRegs(xc, proxy);
 295 }
 296
 297 #if FULL_SYSTEM
 298 VirtualPort*
 299 CPUExecContext::getVirtPort(ExecContext *xc)
 300 {
 301     if (!xc)
 302         return virtPort;
 303
 304     VirtualPort *vp;
 305     Port *mem_port;
 306
 307     vp = new VirtualPort("xc-vport", xc);
 308     mem_port = system->physmem->getPort("functional");
 309     mem_port->setPeer(vp);
 310     vp->setPeer(mem_port);
 311     return vp;
 312 }
 313
 314 void
 315 CPUExecContext::delVirtPort(VirtualPort *vp)
 316 {
 317 //    assert(!vp->nullExecContext());
 318     delete vp->getPeer();
 319     delete vp;
 320 }
 321
 322
 323 #endif
 324