thread_state.cc revision 13905:5cf30883255c 
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 "cpu/thread_state.hh"
32
33#include "base/output.hh"
34#include "cpu/base.hh"
35#include "cpu/profile.hh"
36#include "cpu/quiesce_event.hh"
37#include "kern/kernel_stats.hh"
38#include "mem/fs_translating_port_proxy.hh"
39#include "mem/port.hh"
40#include "mem/port_proxy.hh"
41#include "mem/se_translating_port_proxy.hh"
42#include "sim/full_system.hh"
43#include "sim/serialize.hh"
44#include "sim/system.hh"
45
46ThreadState::ThreadState(BaseCPU *cpu, ThreadID _tid, Process *_process)
47    : numInst(0), numOp(0), numLoad(0), startNumLoad(0),
48      _status(ThreadContext::Halted), baseCpu(cpu),
49      _contextId(0), _threadId(_tid), lastActivate(0), lastSuspend(0),
50      profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL),
51      kernelStats(NULL), process(_process), physProxy(NULL), virtProxy(NULL),
52      proxy(NULL), funcExeInst(0), storeCondFailures(0)
53{
54}
55
56ThreadState::~ThreadState()
57{
58    if (physProxy != NULL)
59        delete physProxy;
60    if (virtProxy != NULL)
61        delete virtProxy;
62    if (proxy != NULL)
63        delete proxy;
64}
65
66void
67ThreadState::serialize(CheckpointOut &cp) const
68{
69    SERIALIZE_ENUM(_status);
70    // thread_num and cpu_id are deterministic from the config
71    SERIALIZE_SCALAR(funcExeInst);
72
73    if (!FullSystem)
74        return;
75
76    Tick quiesceEndTick = 0;
77    if (quiesceEvent->scheduled())
78        quiesceEndTick = quiesceEvent->when();
79    SERIALIZE_SCALAR(quiesceEndTick);
80    if (kernelStats)
81        kernelStats->serialize(cp);
82}
83
84void
85ThreadState::unserialize(CheckpointIn &cp)
86{
87
88    UNSERIALIZE_ENUM(_status);
89    // thread_num and cpu_id are deterministic from the config
90    UNSERIALIZE_SCALAR(funcExeInst);
91
92    if (!FullSystem)
93        return;
94
95    Tick quiesceEndTick;
96    UNSERIALIZE_SCALAR(quiesceEndTick);
97    if (quiesceEndTick)
98        baseCpu->schedule(quiesceEvent, quiesceEndTick);
99    if (kernelStats)
100        kernelStats->unserialize(cp);
101}
102
103void
104ThreadState::initMemProxies(ThreadContext *tc)
105{
106    // The port proxies only refer to the data port on the CPU side
107    // and can safely be done at init() time even if the CPU is not
108    // connected, i.e. when restoring from a checkpoint and later
109    // switching the CPU in.
110    if (FullSystem) {
111        assert(physProxy == NULL);
112        // This cannot be done in the constructor as the thread state
113        // itself is created in the base cpu constructor and the
114        // getDataPort is a virtual function
115        physProxy = new PortProxy(baseCpu->getDataPort(),
116                                  baseCpu->cacheLineSize());
117
118        assert(virtProxy == NULL);
119        virtProxy = new FSTranslatingPortProxy(tc);
120    } else {
121        assert(proxy == NULL);
122        proxy = new SETranslatingPortProxy(baseCpu->getDataPort(),
123                                           process,
124                                           SETranslatingPortProxy::NextPage);
125    }
126}
127
128PortProxy &
129ThreadState::getPhysProxy()
130{
131    assert(FullSystem);
132    assert(physProxy != NULL);
133    return *physProxy;
134}
135
136FSTranslatingPortProxy &
137ThreadState::getVirtProxy()
138{
139    assert(FullSystem);
140    assert(virtProxy != NULL);
141    return *virtProxy;
142}
143
144SETranslatingPortProxy &
145ThreadState::getMemProxy()
146{
147    assert(!FullSystem);
148    assert(proxy != NULL);
149    return *proxy;
150}
151
152void
153ThreadState::profileClear()
154{
155    if (profile)
156        profile->clear();
157}
158
159void
160ThreadState::profileSample()
161{
162    if (profile)
163        profile->sample(profileNode, profilePC);
164}
165