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/translating_port.hh"
  51 #include "mem/vport.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, Process *_process,
  63                            TheISA::TLB *_itb, TheISA::TLB *_dtb)
  64     : ThreadState(_cpu, _thread_num, _process),
  65       cpu(_cpu), itb(_itb), dtb(_dtb)
  66 {
  67     clearArchRegs();
  68     tc = new ProxyThreadContext<SimpleThread>(this);
  69 }
  70 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  71                            TheISA::TLB *_itb, TheISA::TLB *_dtb,
  72                            bool use_kernel_stats)
  73     : ThreadState(_cpu, _thread_num, NULL),
  74       cpu(_cpu), system(_sys), itb(_itb), dtb(_dtb)
  75
  76 {
  77     tc = new ProxyThreadContext<SimpleThread>(this);
  78
  79     quiesceEvent = new EndQuiesceEvent(tc);
  80
  81     clearArchRegs();
  82
  83     if (cpu->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)
 103 {
 104     tc = new ProxyThreadContext<SimpleThread>(this);
 105 }
 106
 107 SimpleThread::~SimpleThread()
 108 {
 109     delete physPort;
 110     delete virtPort;
 111     delete tc;
 112 }
 113
 114 void
 115 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 116 {
 117     // some things should already be set up
 118     if (FullSystem)
 119         assert(system == oldContext->getSystemPtr());
 120     assert(process == oldContext->getProcessPtr());
 121
 122     copyState(oldContext);
 123     if (FullSystem) {
 124         EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
 125         if (quiesce) {
 126             // Point the quiesce event's TC at this TC so that it wakes up
 127             // the proper CPU.
 128             quiesce->tc = tc;
 129         }
 130         if (quiesceEvent) {
 131             quiesceEvent->tc = tc;
 132         }
 133
 134         TheISA::Kernel::Statistics *stats = oldContext->getKernelStats();
 135         if (stats) {
 136             kernelStats = stats;
 137         }
 138     }
 139
 140     storeCondFailures = 0;
 141
 142     oldContext->setStatus(ThreadContext::Halted);
 143 }
 144
 145 void
 146 SimpleThread::copyTC(ThreadContext *context)
 147 {
 148     copyState(context);
 149
 150     if (FullSystem) {
 151         EndQuiesceEvent *quiesce = context->getQuiesceEvent();
 152         if (quiesce) {
 153             quiesceEvent = quiesce;
 154         }
 155         TheISA::Kernel::Statistics *stats = context->getKernelStats();
 156         if (stats) {
 157             kernelStats = stats;
 158         }
 159     }
 160 }
 161
 162 void
 163 SimpleThread::copyState(ThreadContext *oldContext)
 164 {
 165     // copy over functional state
 166     _status = oldContext->status();
 167     copyArchRegs(oldContext);
 168     if (FullSystem)
 169         funcExeInst = oldContext->readFuncExeInst();
 170
 171     _threadId = oldContext->threadId();
 172     _contextId = oldContext->contextId();
 173 }
 174
 175 void
 176 SimpleThread::serialize(ostream &os)
 177 {
 178     ThreadState::serialize(os);
 179     SERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs);
 180     SERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs);
 181     _pcState.serialize(os);
 182     // thread_num and cpu_id are deterministic from the config
 183
 184     //
 185     // Now must serialize all the ISA dependent state
 186     //
 187     isa.serialize(cpu, os);
 188 }
 189
 190
 191 void
 192 SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
 193 {
 194     ThreadState::unserialize(cp, section);
 195     UNSERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs);
 196     UNSERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs);
 197     _pcState.unserialize(cp, section);
 198     // thread_num and cpu_id are deterministic from the config
 199
 200     //
 201     // Now must unserialize all the ISA dependent state
 202     //
 203     isa.unserialize(cpu, cp, section);
 204 }
 205
 206 void
 207 SimpleThread::dumpFuncProfile()
 208 {
 209     std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
 210     profile->dump(tc, *os);
 211 }
 212
 213 void
 214 SimpleThread::activate(int delay)
 215 {
 216     if (status() == ThreadContext::Active)
 217         return;
 218
 219     lastActivate = curTick();
 220
 221 //    if (status() == ThreadContext::Unallocated) {
 222 //      cpu->activateWhenReady(_threadId);
 223 //      return;
 224 //   }
 225
 226     _status = ThreadContext::Active;
 227
 228     // status() == Suspended
 229     cpu->activateContext(_threadId, delay);
 230 }
 231
 232 void
 233 SimpleThread::suspend()
 234 {
 235     if (status() == ThreadContext::Suspended)
 236         return;
 237
 238     lastActivate = curTick();
 239     lastSuspend = curTick();
 240     _status = ThreadContext::Suspended;
 241     cpu->suspendContext(_threadId);
 242 }
 243
 244
 245 void
 246 SimpleThread::halt()
 247 {
 248     if (status() == ThreadContext::Halted)
 249         return;
 250
 251     _status = ThreadContext::Halted;
 252     cpu->haltContext(_threadId);
 253 }
 254
 255
 256 void
 257 SimpleThread::regStats(const string &name)
 258 {
 259     if (FullSystem && kernelStats)
 260         kernelStats->regStats(name + ".kern");
 261 }
 262
 263 void
 264 SimpleThread::copyArchRegs(ThreadContext *src_tc)
 265 {
 266     TheISA::copyRegs(src_tc, tc);
 267 }
 268