simple_thread.cc revision 11627:fe32a5238754 
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    quiesceEvent = new EndQuiesceEvent(tc);
73}
74
75SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
76                           TheISA::TLB *_itb, TheISA::TLB *_dtb,
77                           TheISA::ISA *_isa, bool use_kernel_stats)
78    : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
79      dtb(_dtb)
80{
81    tc = new ProxyThreadContext<SimpleThread>(this);
82
83    quiesceEvent = new EndQuiesceEvent(tc);
84
85    clearArchRegs();
86
87    if (baseCpu->params()->profile) {
88        profile = new FunctionProfile(system->kernelSymtab);
89        Callback *cb =
90            new MakeCallback<SimpleThread,
91            &SimpleThread::dumpFuncProfile>(this);
92        registerExitCallback(cb);
93    }
94
95    // let's fill with a dummy node for now so we don't get a segfault
96    // on the first cycle when there's no node available.
97    static ProfileNode dummyNode;
98    profileNode = &dummyNode;
99    profilePC = 3;
100
101    if (use_kernel_stats)
102        kernelStats = new TheISA::Kernel::Statistics(system);
103}
104
105SimpleThread::~SimpleThread()
106{
107    delete tc;
108}
109
110void
111SimpleThread::takeOverFrom(ThreadContext *oldContext)
112{
113    ::takeOverFrom(*tc, *oldContext);
114    decoder.takeOverFrom(oldContext->getDecoderPtr());
115
116    kernelStats = oldContext->getKernelStats();
117    funcExeInst = oldContext->readFuncExeInst();
118    storeCondFailures = 0;
119}
120
121void
122SimpleThread::copyState(ThreadContext *oldContext)
123{
124    // copy over functional state
125    _status = oldContext->status();
126    copyArchRegs(oldContext);
127    if (FullSystem)
128        funcExeInst = oldContext->readFuncExeInst();
129
130    _threadId = oldContext->threadId();
131    _contextId = oldContext->contextId();
132}
133
134void
135SimpleThread::serialize(CheckpointOut &cp) const
136{
137    ThreadState::serialize(cp);
138    ::serialize(*tc, cp);
139}
140
141
142void
143SimpleThread::unserialize(CheckpointIn &cp)
144{
145    ThreadState::unserialize(cp);
146    ::unserialize(*tc, cp);
147}
148
149void
150SimpleThread::startup()
151{
152    isa->startup(tc);
153}
154
155void
156SimpleThread::dumpFuncProfile()
157{
158    OutputStream *os(simout.create(csprintf("profile.%s.dat", baseCpu->name())));
159    profile->dump(tc, *os->stream());
160    simout.close(os);
161}
162
163void
164SimpleThread::activate()
165{
166    if (status() == ThreadContext::Active)
167        return;
168
169    lastActivate = curTick();
170    _status = ThreadContext::Active;
171    baseCpu->activateContext(_threadId);
172}
173
174void
175SimpleThread::suspend()
176{
177    if (status() == ThreadContext::Suspended)
178        return;
179
180    lastActivate = curTick();
181    lastSuspend = curTick();
182    _status = ThreadContext::Suspended;
183    baseCpu->suspendContext(_threadId);
184}
185
186
187void
188SimpleThread::halt()
189{
190    if (status() == ThreadContext::Halted)
191        return;
192
193    _status = ThreadContext::Halted;
194    baseCpu->haltContext(_threadId);
195}
196
197
198void
199SimpleThread::regStats(const string &name)
200{
201    if (FullSystem && kernelStats)
202        kernelStats->regStats(name + ".kern");
203}
204
205void
206SimpleThread::copyArchRegs(ThreadContext *src_tc)
207{
208    TheISA::copyRegs(src_tc, tc);
209}
210
211// The following methods are defined in src/arch/alpha/ev5.cc for
212// Alpha.
213#if THE_ISA != ALPHA_ISA
214Fault
215SimpleThread::hwrei()
216{
217    return NoFault;
218}
219
220bool
221SimpleThread::simPalCheck(int palFunc)
222{
223    return true;
224}
225#endif
226