simple_thread.cc revision 10905:a6ca6831e775 
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
60using namespace std;
61
62// constructor
63SimpleThread::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),
67      predicate(false), system(_sys),
68      itb(_itb), dtb(_dtb)
69{
70    clearArchRegs();
71    tc = new ProxyThreadContext<SimpleThread>(this);
72}
73
74SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
75                           TheISA::TLB *_itb, TheISA::TLB *_dtb,
76                           TheISA::ISA *_isa, bool use_kernel_stats)
77    : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
78      dtb(_dtb)
79{
80    tc = new ProxyThreadContext<SimpleThread>(this);
81
82    quiesceEvent = new EndQuiesceEvent(tc);
83
84    clearArchRegs();
85
86    if (baseCpu->params()->profile) {
87        profile = new FunctionProfile(system->kernelSymtab);
88        Callback *cb =
89            new MakeCallback<SimpleThread,
90            &SimpleThread::dumpFuncProfile>(this);
91        registerExitCallback(cb);
92    }
93
94    // let's fill with a dummy node for now so we don't get a segfault
95    // on the first cycle when there's no node available.
96    static ProfileNode dummyNode;
97    profileNode = &dummyNode;
98    profilePC = 3;
99
100    if (use_kernel_stats)
101        kernelStats = new TheISA::Kernel::Statistics(system);
102}
103
104SimpleThread::~SimpleThread()
105{
106    delete tc;
107}
108
109void
110SimpleThread::takeOverFrom(ThreadContext *oldContext)
111{
112    ::takeOverFrom(*tc, *oldContext);
113    decoder.takeOverFrom(oldContext->getDecoderPtr());
114
115    kernelStats = oldContext->getKernelStats();
116    funcExeInst = oldContext->readFuncExeInst();
117    storeCondFailures = 0;
118}
119
120void
121SimpleThread::copyState(ThreadContext *oldContext)
122{
123    // copy over functional state
124    _status = oldContext->status();
125    copyArchRegs(oldContext);
126    if (FullSystem)
127        funcExeInst = oldContext->readFuncExeInst();
128
129    _threadId = oldContext->threadId();
130    _contextId = oldContext->contextId();
131}
132
133void
134SimpleThread::serialize(CheckpointOut &cp) const
135{
136    ThreadState::serialize(cp);
137    ::serialize(*tc, cp);
138}
139
140
141void
142SimpleThread::unserialize(CheckpointIn &cp)
143{
144    ThreadState::unserialize(cp);
145    ::unserialize(*tc, cp);
146}
147
148void
149SimpleThread::startup()
150{
151    isa->startup(tc);
152}
153
154void
155SimpleThread::dumpFuncProfile()
156{
157    std::ostream *os = simout.create(csprintf("profile.%s.dat",
158                                              baseCpu->name()));
159    profile->dump(tc, *os);
160}
161
162void
163SimpleThread::activate()
164{
165    if (status() == ThreadContext::Active)
166        return;
167
168    lastActivate = curTick();
169    _status = ThreadContext::Active;
170    baseCpu->activateContext(_threadId);
171}
172
173void
174SimpleThread::suspend()
175{
176    if (status() == ThreadContext::Suspended)
177        return;
178
179    lastActivate = curTick();
180    lastSuspend = curTick();
181    _status = ThreadContext::Suspended;
182    baseCpu->suspendContext(_threadId);
183}
184
185
186void
187SimpleThread::halt()
188{
189    if (status() == ThreadContext::Halted)
190        return;
191
192    _status = ThreadContext::Halted;
193    baseCpu->haltContext(_threadId);
194}
195
196
197void
198SimpleThread::regStats(const string &name)
199{
200    if (FullSystem && kernelStats)
201        kernelStats->regStats(name + ".kern");
202}
203
204void
205SimpleThread::copyArchRegs(ThreadContext *src_tc)
206{
207    TheISA::copyRegs(src_tc, tc);
208}
209
210// The following methods are defined in src/arch/alpha/ev5.cc for
211// Alpha.
212#if THE_ISA != ALPHA_ISA
213Fault
214SimpleThread::hwrei()
215{
216    return NoFault;
217}
218
219bool
220SimpleThread::simPalCheck(int palFunc)
221{
222    return true;
223}
224#endif
225