simple_thread.cc revision 12181:2150eff234c1 
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 "cpu/simple_thread.hh"
35
36#include <string>
37
38#include "arch/isa_traits.hh"
39#include "arch/kernel_stats.hh"
40#include "arch/stacktrace.hh"
41#include "arch/utility.hh"
42#include "base/callback.hh"
43#include "base/cprintf.hh"
44#include "base/output.hh"
45#include "base/trace.hh"
46#include "config/the_isa.hh"
47#include "cpu/base.hh"
48#include "cpu/profile.hh"
49#include "cpu/quiesce_event.hh"
50#include "cpu/thread_context.hh"
51#include "mem/fs_translating_port_proxy.hh"
52#include "mem/se_translating_port_proxy.hh"
53#include "params/BaseCPU.hh"
54#include "sim/faults.hh"
55#include "sim/full_system.hh"
56#include "sim/process.hh"
57#include "sim/serialize.hh"
58#include "sim/sim_exit.hh"
59#include "sim/system.hh"
60
61using namespace std;
62
63// constructor
64SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
65                           Process *_process, TheISA::TLB *_itb,
66                           TheISA::TLB *_dtb, TheISA::ISA *_isa)
67    : ThreadState(_cpu, _thread_num, _process), isa(_isa),
68      predicate(false), system(_sys),
69      itb(_itb), dtb(_dtb)
70{
71    clearArchRegs();
72    tc = new ProxyThreadContext<SimpleThread>(this);
73    quiesceEvent = new EndQuiesceEvent(tc);
74}
75
76SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
77                           TheISA::TLB *_itb, TheISA::TLB *_dtb,
78                           TheISA::ISA *_isa, bool use_kernel_stats)
79    : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
80      dtb(_dtb)
81{
82    tc = new ProxyThreadContext<SimpleThread>(this);
83
84    quiesceEvent = new EndQuiesceEvent(tc);
85
86    clearArchRegs();
87
88    if (baseCpu->params()->profile) {
89        profile = new FunctionProfile(system->kernelSymtab);
90        Callback *cb =
91            new MakeCallback<SimpleThread,
92            &SimpleThread::dumpFuncProfile>(this);
93        registerExitCallback(cb);
94    }
95
96    // let's fill with a dummy node for now so we don't get a segfault
97    // on the first cycle when there's no node available.
98    static ProfileNode dummyNode;
99    profileNode = &dummyNode;
100    profilePC = 3;
101
102    if (use_kernel_stats)
103        kernelStats = new TheISA::Kernel::Statistics();
104}
105
106SimpleThread::~SimpleThread()
107{
108    delete tc;
109}
110
111void
112SimpleThread::takeOverFrom(ThreadContext *oldContext)
113{
114    ::takeOverFrom(*tc, *oldContext);
115    decoder.takeOverFrom(oldContext->getDecoderPtr());
116
117    kernelStats = oldContext->getKernelStats();
118    funcExeInst = oldContext->readFuncExeInst();
119    storeCondFailures = 0;
120}
121
122void
123SimpleThread::copyState(ThreadContext *oldContext)
124{
125    // copy over functional state
126    _status = oldContext->status();
127    copyArchRegs(oldContext);
128    if (FullSystem)
129        funcExeInst = oldContext->readFuncExeInst();
130
131    _threadId = oldContext->threadId();
132    _contextId = oldContext->contextId();
133}
134
135void
136SimpleThread::serialize(CheckpointOut &cp) const
137{
138    ThreadState::serialize(cp);
139    ::serialize(*tc, cp);
140}
141
142
143void
144SimpleThread::unserialize(CheckpointIn &cp)
145{
146    ThreadState::unserialize(cp);
147    ::unserialize(*tc, cp);
148}
149
150void
151SimpleThread::startup()
152{
153    isa->startup(tc);
154}
155
156void
157SimpleThread::dumpFuncProfile()
158{
159    OutputStream *os(simout.create(csprintf("profile.%s.dat", baseCpu->name())));
160    profile->dump(tc, *os->stream());
161    simout.close(os);
162}
163
164void
165SimpleThread::activate()
166{
167    if (status() == ThreadContext::Active)
168        return;
169
170    lastActivate = curTick();
171    _status = ThreadContext::Active;
172    baseCpu->activateContext(_threadId);
173}
174
175void
176SimpleThread::suspend()
177{
178    if (status() == ThreadContext::Suspended)
179        return;
180
181    lastActivate = curTick();
182    lastSuspend = curTick();
183    _status = ThreadContext::Suspended;
184    baseCpu->suspendContext(_threadId);
185}
186
187
188void
189SimpleThread::halt()
190{
191    if (status() == ThreadContext::Halted)
192        return;
193
194    _status = ThreadContext::Halted;
195    baseCpu->haltContext(_threadId);
196}
197
198
199void
200SimpleThread::regStats(const string &name)
201{
202    if (FullSystem && kernelStats)
203        kernelStats->regStats(name + ".kern");
204}
205
206void
207SimpleThread::copyArchRegs(ThreadContext *src_tc)
208{
209    TheISA::copyRegs(src_tc, tc);
210}
211
212// The following methods are defined in src/arch/alpha/ev5.cc for
213// Alpha.
214#if THE_ISA != ALPHA_ISA
215Fault
216SimpleThread::hwrei()
217{
218    return NoFault;
219}
220
221bool
222SimpleThread::simPalCheck(int palFunc)
223{
224    return true;
225}
226#endif
227