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
  29 #include "cpu/thread_state.hh"
  30
  31 #include "base/output.hh"
  32 #include "cpu/base.hh"
  33 #include "mem/port.hh"
  34 #include "mem/port_proxy.hh"
  35 #include "mem/se_translating_port_proxy.hh"
  36 #include "mem/translating_port_proxy.hh"
  37 #include "sim/full_system.hh"
  38 #include "sim/serialize.hh"
  39 #include "sim/system.hh"
  40
  41 ThreadState::ThreadState(BaseCPU *cpu, ThreadID _tid, Process *_process)
  42     : numInst(0), numOp(0), numLoad(0), startNumLoad(0),
  43       _status(ThreadContext::Halted), baseCpu(cpu),
  44       _contextId(0), _threadId(_tid), lastActivate(0), lastSuspend(0),
  45       process(_process), physProxy(NULL), virtProxy(NULL),
  46       funcExeInst(0), storeCondFailures(0)
  47 {
  48 }
  49
  50 ThreadState::~ThreadState()
  51 {
  52     if (physProxy != NULL)
  53         delete physProxy;
  54     if (virtProxy != NULL)
  55         delete virtProxy;
  56 }
  57
  58 void
  59 ThreadState::serialize(CheckpointOut &cp) const
  60 {
  61     SERIALIZE_ENUM(_status);
  62     // thread_num and cpu_id are deterministic from the config
  63     SERIALIZE_SCALAR(funcExeInst);
  64
  65     if (!FullSystem)
  66         return;
  67 }
  68
  69 void
  70 ThreadState::unserialize(CheckpointIn &cp)
  71 {
  72
  73     UNSERIALIZE_ENUM(_status);
  74     // thread_num and cpu_id are deterministic from the config
  75     UNSERIALIZE_SCALAR(funcExeInst);
  76
  77     if (!FullSystem)
  78         return;
  79 }
  80
  81 void
  82 ThreadState::initMemProxies(ThreadContext *tc)
  83 {
  84     // The port proxies only refer to the data port on the CPU side
  85     // and can safely be done at init() time even if the CPU is not
  86     // connected, i.e. when restoring from a checkpoint and later
  87     // switching the CPU in.
  88     if (FullSystem) {
  89         assert(physProxy == NULL);
  90         // This cannot be done in the constructor as the thread state
  91         // itself is created in the base cpu constructor and the
  92         // getSendFunctional is a virtual function
  93         physProxy = new PortProxy(baseCpu->getSendFunctional(),
  94                                   baseCpu->cacheLineSize());
  95
  96         assert(virtProxy == NULL);
  97         virtProxy = new TranslatingPortProxy(tc);
  98     } else {
  99         assert(virtProxy == NULL);
 100         virtProxy = new SETranslatingPortProxy(
 101                 tc, SETranslatingPortProxy::NextPage);
 102     }
 103 }
 104
 105 PortProxy &
 106 ThreadState::getPhysProxy()
 107 {
 108     assert(FullSystem);
 109     assert(physProxy != NULL);
 110     return *physProxy;
 111 }
 112
 113 PortProxy &
 114 ThreadState::getVirtProxy()
 115 {
 116     assert(virtProxy != NULL);
 117     return *virtProxy;
 118 }