thread_state.cc revision 3486:11b71489efd6 
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 "base/output.hh"
32#include "cpu/base.hh"
33#include "cpu/profile.hh"
34#include "cpu/thread_state.hh"
35#include "mem/port.hh"
36#include "mem/translating_port.hh"
37#include "sim/serialize.hh"
38
39#if FULL_SYSTEM
40#include "cpu/quiesce_event.hh"
41#include "kern/kernel_stats.hh"
42#endif
43
44#if FULL_SYSTEM
45ThreadState::ThreadState(BaseCPU *cpu, int _cpuId, int _tid)
46    : baseCpu(cpu), cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
47      profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL),
48      physPort(NULL), virtPort(NULL),
49      microPC(0), nextMicroPC(1), funcExeInst(0), storeCondFailures(0)
50#else
51ThreadState::ThreadState(BaseCPU *cpu, int _cpuId, int _tid, Process *_process,
52                         short _asid)
53    : baseCpu(cpu), cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
54      port(NULL), process(_process), asid(_asid),
55      microPC(0), nextMicroPC(1), funcExeInst(0), storeCondFailures(0)
56#endif
57{
58    numInst = 0;
59    numLoad = 0;
60}
61
62ThreadState::~ThreadState()
63{
64#if !FULL_SYSTEM
65    if (port) {
66        delete port->getPeer();
67        delete port;
68    }
69#endif
70}
71
72void
73ThreadState::serialize(std::ostream &os)
74{
75    SERIALIZE_ENUM(_status);
76    // thread_num and cpu_id are deterministic from the config
77    SERIALIZE_SCALAR(funcExeInst);
78    SERIALIZE_SCALAR(inst);
79    SERIALIZE_SCALAR(microPC);
80    SERIALIZE_SCALAR(nextMicroPC);
81
82#if FULL_SYSTEM
83    Tick quiesceEndTick = 0;
84    if (quiesceEvent->scheduled())
85        quiesceEndTick = quiesceEvent->when();
86    SERIALIZE_SCALAR(quiesceEndTick);
87    if (kernelStats)
88        kernelStats->serialize(os);
89#endif
90}
91
92void
93ThreadState::unserialize(Checkpoint *cp, const std::string &section)
94{
95
96    UNSERIALIZE_ENUM(_status);
97    // thread_num and cpu_id are deterministic from the config
98    UNSERIALIZE_SCALAR(funcExeInst);
99    UNSERIALIZE_SCALAR(inst);
100    UNSERIALIZE_SCALAR(microPC);
101    UNSERIALIZE_SCALAR(nextMicroPC);
102
103#if FULL_SYSTEM
104    Tick quiesceEndTick;
105    UNSERIALIZE_SCALAR(quiesceEndTick);
106    if (quiesceEndTick)
107        quiesceEvent->schedule(quiesceEndTick);
108    if (kernelStats)
109        kernelStats->unserialize(cp, section);
110#endif
111}
112
113#if FULL_SYSTEM
114
115void
116ThreadState::profileClear()
117{
118    if (profile)
119        profile->clear();
120}
121
122void
123ThreadState::profileSample()
124{
125    if (profile)
126        profile->sample(profileNode, profilePC);
127}
128
129#else
130TranslatingPort *
131ThreadState::getMemPort()
132{
133    if (port != NULL)
134        return port;
135
136    /* Use this port to for syscall emulation writes to memory. */
137    port = new TranslatingPort(csprintf("%s-%d-funcport",
138                                        baseCpu->name(), tid),
139                               process->pTable, false);
140
141    Port *func_port = getMemFuncPort();
142
143    func_port->setPeer(port);
144    port->setPeer(func_port);
145
146    return port;
147}
148#endif
149
150Port *
151ThreadState::getMemFuncPort()
152{
153    Port *dcache_port, *func_mem_port;
154
155    dcache_port = baseCpu->getPort("dcache_port");
156    assert(dcache_port != NULL);
157
158    MemObject *mem_object = dcache_port->getPeer()->getOwner();
159    assert(mem_object != NULL);
160
161    func_mem_port = mem_object->getPort("functional");
162    assert(func_mem_port != NULL);
163
164    return func_mem_port;
165}
166