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