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/faults.hh"
  54 #include "sim/full_system.hh"
  55 #include "sim/process.hh"
  56 #include "sim/serialize.hh"
  57 #include "sim/sim_exit.hh"
  58 #include "sim/system.hh"
  59
  60 using namespace std;
  61
  62 // constructor
  63 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  64                            Process *_process, TheISA::TLB *_itb,
  65                            TheISA::TLB *_dtb, TheISA::ISA *_isa)
  66     : ThreadState(_cpu, _thread_num, _process), isa(_isa),
  67       predicate(false), system(_sys),
  68       itb(_itb), dtb(_dtb)
  69 {
  70     clearArchRegs();
  71     tc = new ProxyThreadContext<SimpleThread>(this);
  72     quiesceEvent = new EndQuiesceEvent(tc);
  73 }
  74
  75 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  76                            TheISA::TLB *_itb, TheISA::TLB *_dtb,
  77                            TheISA::ISA *_isa, bool use_kernel_stats)
  78     : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
  79       dtb(_dtb)
  80 {
  81     tc = new ProxyThreadContext<SimpleThread>(this);
  82
  83     quiesceEvent = new EndQuiesceEvent(tc);
  84
  85     clearArchRegs();
  86
  87     if (baseCpu->params()->profile) {
  88         profile = new FunctionProfile(system->kernelSymtab);
  89         Callback *cb =
  90             new MakeCallback<SimpleThread,
  91             &SimpleThread::dumpFuncProfile>(this);
  92         registerExitCallback(cb);
  93     }
  94
  95     // let's fill with a dummy node for now so we don't get a segfault
  96     // on the first cycle when there's no node available.
  97     static ProfileNode dummyNode;
  98     profileNode = &dummyNode;
  99     profilePC = 3;
 100
 101     if (use_kernel_stats)
 102         kernelStats = new TheISA::Kernel::Statistics(system);
 103 }
 104
 105 SimpleThread::~SimpleThread()
 106 {
 107     delete tc;
 108 }
 109
 110 void
 111 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 112 {
 113     ::takeOverFrom(*tc, *oldContext);
 114     decoder.takeOverFrom(oldContext->getDecoderPtr());
 115
 116     kernelStats = oldContext->getKernelStats();
 117     funcExeInst = oldContext->readFuncExeInst();
 118     storeCondFailures = 0;
 119 }
 120
 121 void
 122 SimpleThread::copyState(ThreadContext *oldContext)
 123 {
 124     // copy over functional state
 125     _status = oldContext->status();
 126     copyArchRegs(oldContext);
 127     if (FullSystem)
 128         funcExeInst = oldContext->readFuncExeInst();
 129
 130     _threadId = oldContext->threadId();
 131     _contextId = oldContext->contextId();
 132 }
 133
 134 void
 135 SimpleThread::serialize(CheckpointOut &cp) const
 136 {
 137     ThreadState::serialize(cp);
 138     ::serialize(*tc, cp);
 139 }
 140
 141
 142 void
 143 SimpleThread::unserialize(CheckpointIn &cp)
 144 {
 145     ThreadState::unserialize(cp);
 146     ::unserialize(*tc, cp);
 147 }
 148
 149 void
 150 SimpleThread::startup()
 151 {
 152     isa->startup(tc);
 153 }
 154
 155 void
 156 SimpleThread::dumpFuncProfile()
 157 {
 158     OutputStream *os(simout.create(csprintf("profile.%s.dat", baseCpu->name())));
 159     profile->dump(tc, *os->stream());
 160     simout.close(os);
 161 }
 162
 163 void
 164 SimpleThread::activate()
 165 {
 166     if (status() == ThreadContext::Active)
 167         return;
 168
 169     lastActivate = curTick();
 170     _status = ThreadContext::Active;
 171     baseCpu->activateContext(_threadId);
 172 }
 173
 174 void
 175 SimpleThread::suspend()
 176 {
 177     if (status() == ThreadContext::Suspended)
 178         return;
 179
 180     lastActivate = curTick();
 181     lastSuspend = curTick();
 182     _status = ThreadContext::Suspended;
 183     baseCpu->suspendContext(_threadId);
 184 }
 185
 186
 187 void
 188 SimpleThread::halt()
 189 {
 190     if (status() == ThreadContext::Halted)
 191         return;
 192
 193     _status = ThreadContext::Halted;
 194     baseCpu->haltContext(_threadId);
 195 }
 196
 197
 198 void
 199 SimpleThread::regStats(const string &name)
 200 {
 201     if (FullSystem && kernelStats)
 202         kernelStats->regStats(name + ".kern");
 203 }
 204
 205 void
 206 SimpleThread::copyArchRegs(ThreadContext *src_tc)
 207 {
 208     TheISA::copyRegs(src_tc, tc);
 209 }
 210
 211 // The following methods are defined in src/arch/alpha/ev5.cc for
 212 // Alpha.
 213 #if THE_ISA != ALPHA_ISA
 214 Fault
 215 SimpleThread::hwrei()
 216 {
 217     return NoFault;
 218 }
 219
 220 bool
 221 SimpleThread::simPalCheck(int palFunc)
 222 {
 223     return true;
 224 }
 225 #endif