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 "arch/kernel_stats.hh"
  38 #include "arch/stacktrace.hh"
  39 #include "arch/utility.hh"
  40 #include "base/callback.hh"
  41 #include "base/cprintf.hh"
  42 #include "base/output.hh"
  43 #include "base/trace.hh"
  44 #include "config/the_isa.hh"
  45 #include "cpu/base.hh"
  46 #include "cpu/profile.hh"
  47 #include "cpu/quiesce_event.hh"
  48 #include "cpu/simple_thread.hh"
  49 #include "cpu/thread_context.hh"
  50 #include "mem/fs_translating_port_proxy.hh"
  51 #include "mem/se_translating_port_proxy.hh"
  52 #include "params/BaseCPU.hh"
  53 #include "sim/full_system.hh"
  54 #include "sim/process.hh"
  55 #include "sim/serialize.hh"
  56 #include "sim/sim_exit.hh"
  57 #include "sim/system.hh"
  58
  59 using namespace std;
  60
  61 // constructor
  62 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  63                            Process *_process, TheISA::TLB *_itb,
  64                            TheISA::TLB *_dtb)
  65     : ThreadState(_cpu, _thread_num, _process), system(_sys), itb(_itb),
  66       dtb(_dtb), decoder(NULL)
  67 {
  68     clearArchRegs();
  69     tc = new ProxyThreadContext<SimpleThread>(this);
  70 }
  71 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  72                            TheISA::TLB *_itb, TheISA::TLB *_dtb,
  73                            bool use_kernel_stats)
  74     : ThreadState(_cpu, _thread_num, NULL), system(_sys), itb(_itb), dtb(_dtb),
  75       decoder(NULL)
  76 {
  77     tc = new ProxyThreadContext<SimpleThread>(this);
  78
  79     quiesceEvent = new EndQuiesceEvent(tc);
  80
  81     clearArchRegs();
  82
  83     if (baseCpu->params()->profile) {
  84         profile = new FunctionProfile(system->kernelSymtab);
  85         Callback *cb =
  86             new MakeCallback<SimpleThread,
  87             &SimpleThread::dumpFuncProfile>(this);
  88         registerExitCallback(cb);
  89     }
  90
  91     // let's fill with a dummy node for now so we don't get a segfault
  92     // on the first cycle when there's no node available.
  93     static ProfileNode dummyNode;
  94     profileNode = &dummyNode;
  95     profilePC = 3;
  96
  97     if (use_kernel_stats)
  98         kernelStats = new TheISA::Kernel::Statistics(system);
  99 }
 100
 101 SimpleThread::SimpleThread()
 102     : ThreadState(NULL, -1, NULL), decoder(NULL)
 103 {
 104     tc = new ProxyThreadContext<SimpleThread>(this);
 105 }
 106
 107 SimpleThread::~SimpleThread()
 108 {
 109     delete tc;
 110 }
 111
 112 void
 113 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 114 {
 115     // some things should already be set up
 116     if (FullSystem)
 117         assert(system == oldContext->getSystemPtr());
 118     assert(process == oldContext->getProcessPtr());
 119
 120     copyState(oldContext);
 121     if (FullSystem) {
 122         EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
 123         if (quiesce) {
 124             // Point the quiesce event's TC at this TC so that it wakes up
 125             // the proper CPU.
 126             quiesce->tc = tc;
 127         }
 128         if (quiesceEvent) {
 129             quiesceEvent->tc = tc;
 130         }
 131
 132         TheISA::Kernel::Statistics *stats = oldContext->getKernelStats();
 133         if (stats) {
 134             kernelStats = stats;
 135         }
 136     }
 137
 138     storeCondFailures = 0;
 139
 140     oldContext->setStatus(ThreadContext::Halted);
 141 }
 142
 143 void
 144 SimpleThread::copyTC(ThreadContext *context)
 145 {
 146     copyState(context);
 147
 148     if (FullSystem) {
 149         EndQuiesceEvent *quiesce = context->getQuiesceEvent();
 150         if (quiesce) {
 151             quiesceEvent = quiesce;
 152         }
 153         TheISA::Kernel::Statistics *stats = context->getKernelStats();
 154         if (stats) {
 155             kernelStats = stats;
 156         }
 157     }
 158 }
 159
 160 void
 161 SimpleThread::copyState(ThreadContext *oldContext)
 162 {
 163     // copy over functional state
 164     _status = oldContext->status();
 165     copyArchRegs(oldContext);
 166     if (FullSystem)
 167         funcExeInst = oldContext->readFuncExeInst();
 168
 169     _threadId = oldContext->threadId();
 170     _contextId = oldContext->contextId();
 171 }
 172
 173 void
 174 SimpleThread::serialize(ostream &os)
 175 {
 176     ThreadState::serialize(os);
 177     SERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs);
 178     SERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs);
 179     _pcState.serialize(os);
 180     // thread_num and cpu_id are deterministic from the config
 181
 182     //
 183     // Now must serialize all the ISA dependent state
 184     //
 185     isa.serialize(baseCpu, os);
 186 }
 187
 188
 189 void
 190 SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
 191 {
 192     ThreadState::unserialize(cp, section);
 193     UNSERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs);
 194     UNSERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs);
 195     _pcState.unserialize(cp, section);
 196     // thread_num and cpu_id are deterministic from the config
 197
 198     //
 199     // Now must unserialize all the ISA dependent state
 200     //
 201     isa.unserialize(baseCpu, cp, section);
 202 }
 203
 204 void
 205 SimpleThread::dumpFuncProfile()
 206 {
 207     std::ostream *os = simout.create(csprintf("profile.%s.dat",
 208                                               baseCpu->name()));
 209     profile->dump(tc, *os);
 210 }
 211
 212 void
 213 SimpleThread::activate(int delay)
 214 {
 215     if (status() == ThreadContext::Active)
 216         return;
 217
 218     lastActivate = curTick();
 219
 220 //    if (status() == ThreadContext::Unallocated) {
 221 //      cpu->activateWhenReady(_threadId);
 222 //      return;
 223 //   }
 224
 225     _status = ThreadContext::Active;
 226
 227     // status() == Suspended
 228     baseCpu->activateContext(_threadId, delay);
 229 }
 230
 231 void
 232 SimpleThread::suspend()
 233 {
 234     if (status() == ThreadContext::Suspended)
 235         return;
 236
 237     lastActivate = curTick();
 238     lastSuspend = curTick();
 239     _status = ThreadContext::Suspended;
 240     baseCpu->suspendContext(_threadId);
 241 }
 242
 243
 244 void
 245 SimpleThread::halt()
 246 {
 247     if (status() == ThreadContext::Halted)
 248         return;
 249
 250     _status = ThreadContext::Halted;
 251     baseCpu->haltContext(_threadId);
 252 }
 253
 254
 255 void
 256 SimpleThread::regStats(const string &name)
 257 {
 258     if (FullSystem && kernelStats)
 259         kernelStats->regStats(name + ".kern");
 260 }
 261
 262 void
 263 SimpleThread::copyArchRegs(ThreadContext *src_tc)
 264 {
 265     TheISA::copyRegs(src_tc, tc);
 266 }
 267