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