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