src/cpu/simple_thread.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  * Authors: Steve Reinhardt
  29  *          Nathan Binkert
  30  *          Lisa Hsu
  31  *          Kevin Lim
  32  */
  33
  34 #include <string>
  35
  36 #include "arch/isa_traits.hh"
  37 #include "cpu/base.hh"
  38 #include "cpu/simple_thread.hh"
  39 #include "cpu/thread_context.hh"
  40
  41 #if FULL_SYSTEM
  42 #include "base/callback.hh"
  43 #include "base/cprintf.hh"
  44 #include "base/output.hh"
  45 #include "base/trace.hh"
  46 #include "cpu/profile.hh"
  47 #include "cpu/quiesce_event.hh"
  48 #include "kern/kernel_stats.hh"
  49 #include "sim/serialize.hh"
  50 #include "sim/sim_exit.hh"
  51 #include "arch/stacktrace.hh"
  52 #else
  53 #include "sim/process.hh"
  54 #include "sim/system.hh"
  55 #include "mem/translating_port.hh"
  56 #endif
  57
  58 using namespace std;
  59
  60 // constructor
  61 #if FULL_SYSTEM
  62 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  63                            AlphaITB *_itb, AlphaDTB *_dtb,
  64                            bool use_kernel_stats)
  65     : ThreadState(-1, _thread_num), cpu(_cpu), system(_sys), itb(_itb),
  66       dtb(_dtb)
  67
  68 {
  69     tc = new ProxyThreadContext<SimpleThread>(this);
  70
  71     quiesceEvent = new EndQuiesceEvent(tc);
  72
  73     regs.clear();
  74
  75     if (cpu->params->profile) {
  76         profile = new FunctionProfile(system->kernelSymtab);
  77         Callback *cb =
  78             new MakeCallback<SimpleThread,
  79             &SimpleThread::dumpFuncProfile>(this);
  80         registerExitCallback(cb);
  81     }
  82
  83     // let's fill with a dummy node for now so we don't get a segfault
  84     // on the first cycle when there's no node available.
  85     static ProfileNode dummyNode;
  86     profileNode = &dummyNode;
  87     profilePC = 3;
  88
  89     if (use_kernel_stats) {
  90         kernelStats = new Kernel::Statistics(system);
  91     } else {
  92         kernelStats = NULL;
  93     }
  94     Port *mem_port;
  95     physPort = new FunctionalPort(csprintf("%s-%d-funcport",
  96                                            cpu->name(), tid));
  97     mem_port = system->physmem->getPort("functional");
  98     mem_port->setPeer(physPort);
  99     physPort->setPeer(mem_port);
 100
 101     virtPort = new VirtualPort(csprintf("%s-%d-vport",
 102                                         cpu->name(), tid));
 103     mem_port = system->physmem->getPort("functional");
 104     mem_port->setPeer(virtPort);
 105     virtPort->setPeer(mem_port);
 106 }
 107 #else
 108 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num,
 109                          Process *_process, int _asid, MemObject* memobj)
 110     : ThreadState(-1, _thread_num, _process, _asid, memobj),
 111       cpu(_cpu)
 112 {
 113     /* Use this port to for syscall emulation writes to memory. */
 114     Port *mem_port;
 115     port = new TranslatingPort(csprintf("%s-%d-funcport",
 116                                         cpu->name(), tid),
 117                                process->pTable, false);
 118     mem_port = memobj->getPort("functional");
 119     mem_port->setPeer(port);
 120     port->setPeer(mem_port);
 121
 122     regs.clear();
 123     tc = new ProxyThreadContext<SimpleThread>(this);
 124 }
 125
 126 #endif
 127
 128 SimpleThread::SimpleThread()
 129 #if FULL_SYSTEM
 130     : ThreadState(-1, -1)
 131 #else
 132     : ThreadState(-1, -1, NULL, -1, NULL)
 133 #endif
 134 {
 135     tc = new ProxyThreadContext<SimpleThread>(this);
 136     regs.clear();
 137 }
 138
 139 SimpleThread::~SimpleThread()
 140 {
 141     delete tc;
 142 }
 143
 144 void
 145 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 146 {
 147     // some things should already be set up
 148 #if FULL_SYSTEM
 149     assert(system == oldContext->getSystemPtr());
 150 #else
 151     assert(process == oldContext->getProcessPtr());
 152 #endif
 153
 154     copyState(oldContext);
 155 #if FULL_SYSTEM
 156     EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
 157     if (quiesce) {
 158         // Point the quiesce event's TC at this TC so that it wakes up
 159         // the proper CPU.
 160         quiesce->tc = tc;
 161     }
 162     if (quiesceEvent) {
 163         quiesceEvent->tc = tc;
 164     }
 165
 166     Kernel::Statistics *stats = oldContext->getKernelStats();
 167     if (stats) {
 168         kernelStats = stats;
 169     }
 170 #endif
 171
 172     storeCondFailures = 0;
 173
 174     oldContext->setStatus(ThreadContext::Unallocated);
 175 }
 176
 177 void
 178 SimpleThread::copyTC(ThreadContext *context)
 179 {
 180     copyState(context);
 181
 182 #if FULL_SYSTEM
 183     EndQuiesceEvent *quiesce = context->getQuiesceEvent();
 184     if (quiesce) {
 185         quiesceEvent = quiesce;
 186     }
 187     Kernel::Statistics *stats = context->getKernelStats();
 188     if (stats) {
 189         kernelStats = stats;
 190     }
 191 #endif
 192 }
 193
 194 void
 195 SimpleThread::copyState(ThreadContext *oldContext)
 196 {
 197     // copy over functional state
 198     _status = oldContext->status();
 199     copyArchRegs(oldContext);
 200     cpuId = oldContext->readCpuId();
 201 #if !FULL_SYSTEM
 202     funcExeInst = oldContext->readFuncExeInst();
 203 #endif
 204     inst = oldContext->getInst();
 205 }
 206
 207 void
 208 SimpleThread::serialize(ostream &os)
 209 {
 210     ThreadState::serialize(os);
 211     regs.serialize(os);
 212     // thread_num and cpu_id are deterministic from the config
 213 }
 214
 215
 216 void
 217 SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
 218 {
 219     ThreadState::unserialize(cp, section);
 220     regs.unserialize(cp, section);
 221     // thread_num and cpu_id are deterministic from the config
 222 }
 223
 224 #if FULL_SYSTEM
 225 void
 226 SimpleThread::dumpFuncProfile()
 227 {
 228     std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
 229     profile->dump(tc, *os);
 230 }
 231 #endif
 232
 233 void
 234 SimpleThread::activate(int delay)
 235 {
 236     if (status() == ThreadContext::Active)
 237         return;
 238
 239     lastActivate = curTick;
 240
 241     if (status() == ThreadContext::Unallocated) {
 242         cpu->activateWhenReady(tid);
 243         return;
 244     }
 245
 246     _status = ThreadContext::Active;
 247
 248     // status() == Suspended
 249     cpu->activateContext(tid, delay);
 250 }
 251
 252 void
 253 SimpleThread::suspend()
 254 {
 255     if (status() == ThreadContext::Suspended)
 256         return;
 257
 258     lastActivate = curTick;
 259     lastSuspend = curTick;
 260 /*
 261 #if FULL_SYSTEM
 262     // Don't change the status from active if there are pending interrupts
 263     if (cpu->check_interrupts()) {
 264         assert(status() == ThreadContext::Active);
 265         return;
 266     }
 267 #endif
 268 */
 269     _status = ThreadContext::Suspended;
 270     cpu->suspendContext(tid);
 271 }
 272
 273 void
 274 SimpleThread::deallocate()
 275 {
 276     if (status() == ThreadContext::Unallocated)
 277         return;
 278
 279     _status = ThreadContext::Unallocated;
 280     cpu->deallocateContext(tid);
 281 }
 282
 283 void
 284 SimpleThread::halt()
 285 {
 286     if (status() == ThreadContext::Halted)
 287         return;
 288
 289     _status = ThreadContext::Halted;
 290     cpu->haltContext(tid);
 291 }
 292
 293
 294 void
 295 SimpleThread::regStats(const string &name)
 296 {
 297 #if FULL_SYSTEM
 298     if (kernelStats)
 299         kernelStats->regStats(name + ".kern");
 300 #endif
 301 }
 302
 303 void
 304 SimpleThread::copyArchRegs(ThreadContext *src_tc)
 305 {
 306     TheISA::copyRegs(src_tc, tc);
 307 }
 308
 309 #if FULL_SYSTEM
 310 VirtualPort*
 311 SimpleThread::getVirtPort(ThreadContext *src_tc)
 312 {
 313     if (!src_tc)
 314         return virtPort;
 315
 316     VirtualPort *vp;
 317     Port *mem_port;
 318
 319     vp = new VirtualPort("tc-vport", src_tc);
 320     mem_port = system->physmem->getPort("functional");
 321     mem_port->setPeer(vp);
 322     vp->setPeer(mem_port);
 323     return vp;
 324 }
 325
 326 void
 327 SimpleThread::delVirtPort(VirtualPort *vp)
 328 {
 329     if (vp != virtPort) {
 330         delete vp->getPeer();
 331         delete vp;
 332     }
 333 }
 334
 335
 336 #endif
 337