src/cpu/thread_state.cc

   1 /*
   2  * Copyright (c) 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: Kevin Lim
  29  */
  30
  31 #include "arch/kernel_stats.hh"
  32 #include "base/output.hh"
  33 #include "cpu/base.hh"
  34 #include "cpu/profile.hh"
  35 #include "cpu/quiesce_event.hh"
  36 #include "cpu/thread_state.hh"
  37 #include "mem/fs_translating_port_proxy.hh"
  38 #include "mem/port.hh"
  39 #include "mem/port_proxy.hh"
  40 #include "mem/se_translating_port_proxy.hh"
  41 #include "sim/full_system.hh"
  42 #include "sim/serialize.hh"
  43 #include "sim/system.hh"
  44
  45 ThreadState::ThreadState(BaseCPU *cpu, ThreadID _tid, Process *_process)
  46     : numInst(0), numOp(0), numLoad(0), _status(ThreadContext::Halted),
  47       baseCpu(cpu), _threadId(_tid), lastActivate(0), lastSuspend(0),
  48       profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL),
  49       kernelStats(NULL), process(_process), physProxy(NULL), virtProxy(NULL),
  50       proxy(NULL), funcExeInst(0), storeCondFailures(0)
  51 {
  52 }
  53
  54 ThreadState::~ThreadState()
  55 {
  56     if (physProxy != NULL)
  57         delete physProxy;
  58     if (virtProxy != NULL)
  59         delete virtProxy;
  60     if (proxy != NULL)
  61         delete proxy;
  62 }
  63
  64 void
  65 ThreadState::serialize(std::ostream &os)
  66 {
  67     SERIALIZE_ENUM(_status);
  68     // thread_num and cpu_id are deterministic from the config
  69     SERIALIZE_SCALAR(funcExeInst);
  70
  71     if (!FullSystem)
  72         return;
  73
  74     Tick quiesceEndTick = 0;
  75     if (quiesceEvent->scheduled())
  76         quiesceEndTick = quiesceEvent->when();
  77     SERIALIZE_SCALAR(quiesceEndTick);
  78     if (kernelStats)
  79         kernelStats->serialize(os);
  80 }
  81
  82 void
  83 ThreadState::unserialize(Checkpoint *cp, const std::string &section)
  84 {
  85
  86     UNSERIALIZE_ENUM(_status);
  87     // thread_num and cpu_id are deterministic from the config
  88     UNSERIALIZE_SCALAR(funcExeInst);
  89
  90     if (!FullSystem)
  91         return;
  92
  93     Tick quiesceEndTick;
  94     UNSERIALIZE_SCALAR(quiesceEndTick);
  95     if (quiesceEndTick)
  96         baseCpu->schedule(quiesceEvent, quiesceEndTick);
  97     if (kernelStats)
  98         kernelStats->unserialize(cp, section);
  99 }
 100
 101 void
 102 ThreadState::initMemProxies(ThreadContext *tc)
 103 {
 104     // The port proxies only refer to the data port on the CPU side
 105     // and can safely be done at init() time even if the CPU is not
 106     // connected, i.e. when restoring from a checkpoint and later
 107     // switching the CPU in.
 108     if (FullSystem) {
 109         assert(physProxy == NULL);
 110         // This cannot be done in the constructor as the thread state
 111         // itself is created in the base cpu constructor and the
 112         // getDataPort is a virtual function
 113         physProxy = new PortProxy(baseCpu->getDataPort(),
 114                                   baseCpu->cacheLineSize());
 115
 116         assert(virtProxy == NULL);
 117         virtProxy = new FSTranslatingPortProxy(tc);
 118     } else {
 119         assert(proxy == NULL);
 120         proxy = new SETranslatingPortProxy(baseCpu->getDataPort(),
 121                                            process,
 122                                            SETranslatingPortProxy::NextPage);
 123     }
 124 }
 125
 126 PortProxy &
 127 ThreadState::getPhysProxy()
 128 {
 129     assert(FullSystem);
 130     assert(physProxy != NULL);
 131     return *physProxy;
 132 }
 133
 134 FSTranslatingPortProxy &
 135 ThreadState::getVirtProxy()
 136 {
 137     assert(FullSystem);
 138     assert(virtProxy != NULL);
 139     return *virtProxy;
 140 }
 141
 142 SETranslatingPortProxy &
 143 ThreadState::getMemProxy()
 144 {
 145     assert(!FullSystem);
 146     assert(proxy != NULL);
 147     return *proxy;
 148 }
 149
 150 void
 151 ThreadState::profileClear()
 152 {
 153     if (profile)
 154         profile->clear();
 155 }
 156
 157 void
 158 ThreadState::profileSample()
 159 {
 160     if (profile)
 161         profile->sample(profileNode, profilePC);
 162 }