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 "cpu/simple_thread.hh"
  35
  36 #include <string>
  37
  38 #include "arch/isa_traits.hh"
  39 #include "arch/kernel_stats.hh"
  40 #include "arch/stacktrace.hh"
  41 #include "arch/utility.hh"
  42 #include "base/callback.hh"
  43 #include "base/cprintf.hh"
  44 #include "base/output.hh"
  45 #include "base/trace.hh"
  46 #include "config/the_isa.hh"
  47 #include "cpu/base.hh"
  48 #include "cpu/profile.hh"
  49 #include "cpu/quiesce_event.hh"
  50 #include "cpu/thread_context.hh"
  51 #include "mem/fs_translating_port_proxy.hh"
  52 #include "mem/se_translating_port_proxy.hh"
  53 #include "params/BaseCPU.hh"
  54 #include "sim/faults.hh"
  55 #include "sim/full_system.hh"
  56 #include "sim/process.hh"
  57 #include "sim/serialize.hh"
  58 #include "sim/sim_exit.hh"
  59 #include "sim/system.hh"
  60
  61 using namespace std;
  62
  63 // constructor
  64 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  65                            Process *_process, TheISA::TLB *_itb,
  66                            TheISA::TLB *_dtb, TheISA::ISA *_isa)
  67     : ThreadState(_cpu, _thread_num, _process), isa(_isa),
  68       predicate(false), system(_sys),
  69       itb(_itb), dtb(_dtb)
  70 {
  71     clearArchRegs();
  72     tc = new ProxyThreadContext<SimpleThread>(this);
  73     quiesceEvent = new EndQuiesceEvent(tc);
  74 }
  75
  76 SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
  77                            TheISA::TLB *_itb, TheISA::TLB *_dtb,
  78                            TheISA::ISA *_isa, bool use_kernel_stats)
  79     : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
  80       dtb(_dtb)
  81 {
  82     tc = new ProxyThreadContext<SimpleThread>(this);
  83
  84     quiesceEvent = new EndQuiesceEvent(tc);
  85
  86     clearArchRegs();
  87
  88     if (baseCpu->params()->profile) {
  89         profile = new FunctionProfile(system->kernelSymtab);
  90         Callback *cb =
  91             new MakeCallback<SimpleThread,
  92             &SimpleThread::dumpFuncProfile>(this);
  93         registerExitCallback(cb);
  94     }
  95
  96     // let's fill with a dummy node for now so we don't get a segfault
  97     // on the first cycle when there's no node available.
  98     static ProfileNode dummyNode;
  99     profileNode = &dummyNode;
 100     profilePC = 3;
 101
 102     if (use_kernel_stats)
 103         kernelStats = new TheISA::Kernel::Statistics(system);
 104 }
 105
 106 SimpleThread::~SimpleThread()
 107 {
 108     delete tc;
 109 }
 110
 111 void
 112 SimpleThread::takeOverFrom(ThreadContext *oldContext)
 113 {
 114     ::takeOverFrom(*tc, *oldContext);
 115     decoder.takeOverFrom(oldContext->getDecoderPtr());
 116
 117     kernelStats = oldContext->getKernelStats();
 118     funcExeInst = oldContext->readFuncExeInst();
 119     storeCondFailures = 0;
 120 }
 121
 122 void
 123 SimpleThread::copyState(ThreadContext *oldContext)
 124 {
 125     // copy over functional state
 126     _status = oldContext->status();
 127     copyArchRegs(oldContext);
 128     if (FullSystem)
 129         funcExeInst = oldContext->readFuncExeInst();
 130
 131     _threadId = oldContext->threadId();
 132     _contextId = oldContext->contextId();
 133 }
 134
 135 void
 136 SimpleThread::serialize(CheckpointOut &cp) const
 137 {
 138     ThreadState::serialize(cp);
 139     ::serialize(*tc, cp);
 140 }
 141
 142
 143 void
 144 SimpleThread::unserialize(CheckpointIn &cp)
 145 {
 146     ThreadState::unserialize(cp);
 147     ::unserialize(*tc, cp);
 148 }
 149
 150 void
 151 SimpleThread::startup()
 152 {
 153     isa->startup(tc);
 154 }
 155
 156 void
 157 SimpleThread::dumpFuncProfile()
 158 {
 159     OutputStream *os(simout.create(csprintf("profile.%s.dat", baseCpu->name())));
 160     profile->dump(tc, *os->stream());
 161     simout.close(os);
 162 }
 163
 164 void
 165 SimpleThread::activate()
 166 {
 167     if (status() == ThreadContext::Active)
 168         return;
 169
 170     lastActivate = curTick();
 171     _status = ThreadContext::Active;
 172     baseCpu->activateContext(_threadId);
 173 }
 174
 175 void
 176 SimpleThread::suspend()
 177 {
 178     if (status() == ThreadContext::Suspended)
 179         return;
 180
 181     lastActivate = curTick();
 182     lastSuspend = curTick();
 183     _status = ThreadContext::Suspended;
 184     baseCpu->suspendContext(_threadId);
 185 }
 186
 187
 188 void
 189 SimpleThread::halt()
 190 {
 191     if (status() == ThreadContext::Halted)
 192         return;
 193
 194     _status = ThreadContext::Halted;
 195     baseCpu->haltContext(_threadId);
 196 }
 197
 198
 199 void
 200 SimpleThread::regStats(const string &name)
 201 {
 202     if (FullSystem && kernelStats)
 203         kernelStats->regStats(name + ".kern");
 204 }
 205
 206 void
 207 SimpleThread::copyArchRegs(ThreadContext *src_tc)
 208 {
 209     TheISA::copyRegs(src_tc, tc);
 210 }
 211
 212 // The following methods are defined in src/arch/alpha/ev5.cc for
 213 // Alpha.
 214 #if THE_ISA != ALPHA_ISA
 215 Fault
 216 SimpleThread::hwrei()
 217 {
 218     return NoFault;
 219 }
 220
 221 bool
 222 SimpleThread::simPalCheck(int palFunc)
 223 {
 224     return true;
 225 }
 226 #endif