simple_thread.cc revision 10319:4207f9bfcceb 
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), system(_sys),
67      itb(_itb), dtb(_dtb)
68{
69    clearArchRegs();
70    tc = new ProxyThreadContext<SimpleThread>(this);
71}
72
73SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
74                           TheISA::TLB *_itb, TheISA::TLB *_dtb,
75                           TheISA::ISA *_isa, bool use_kernel_stats)
76    : ThreadState(_cpu, _thread_num, NULL), isa(_isa), system(_sys), itb(_itb),
77      dtb(_dtb)
78{
79    tc = new ProxyThreadContext<SimpleThread>(this);
80
81    quiesceEvent = new EndQuiesceEvent(tc);
82
83    clearArchRegs();
84
85    if (baseCpu->params()->profile) {
86        profile = new FunctionProfile(system->kernelSymtab);
87        Callback *cb =
88            new MakeCallback<SimpleThread,
89            &SimpleThread::dumpFuncProfile>(this);
90        registerExitCallback(cb);
91    }
92
93    // let's fill with a dummy node for now so we don't get a segfault
94    // on the first cycle when there's no node available.
95    static ProfileNode dummyNode;
96    profileNode = &dummyNode;
97    profilePC = 3;
98
99    if (use_kernel_stats)
100        kernelStats = new TheISA::Kernel::Statistics(system);
101}
102
103SimpleThread::~SimpleThread()
104{
105    delete tc;
106}
107
108void
109SimpleThread::takeOverFrom(ThreadContext *oldContext)
110{
111    ::takeOverFrom(*tc, *oldContext);
112    decoder.takeOverFrom(oldContext->getDecoderPtr());
113
114    kernelStats = oldContext->getKernelStats();
115    funcExeInst = oldContext->readFuncExeInst();
116    storeCondFailures = 0;
117}
118
119void
120SimpleThread::copyState(ThreadContext *oldContext)
121{
122    // copy over functional state
123    _status = oldContext->status();
124    copyArchRegs(oldContext);
125    if (FullSystem)
126        funcExeInst = oldContext->readFuncExeInst();
127
128    _threadId = oldContext->threadId();
129    _contextId = oldContext->contextId();
130}
131
132void
133SimpleThread::serialize(ostream &os)
134{
135    ThreadState::serialize(os);
136    ::serialize(*tc, os);
137}
138
139
140void
141SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
142{
143    ThreadState::unserialize(cp, section);
144    ::unserialize(*tc, cp, section);
145}
146
147void
148SimpleThread::startup()
149{
150    isa->startup(tc);
151}
152
153void
154SimpleThread::dumpFuncProfile()
155{
156    std::ostream *os = simout.create(csprintf("profile.%s.dat",
157                                              baseCpu->name()));
158    profile->dump(tc, *os);
159}
160
161void
162SimpleThread::activate(Cycles delay)
163{
164    if (status() == ThreadContext::Active)
165        return;
166
167    lastActivate = curTick();
168
169//    if (status() == ThreadContext::Unallocated) {
170//      cpu->activateWhenReady(_threadId);
171//      return;
172//   }
173
174    _status = ThreadContext::Active;
175
176    // status() == Suspended
177    baseCpu->activateContext(_threadId, delay);
178}
179
180void
181SimpleThread::suspend()
182{
183    if (status() == ThreadContext::Suspended)
184        return;
185
186    lastActivate = curTick();
187    lastSuspend = curTick();
188    _status = ThreadContext::Suspended;
189    baseCpu->suspendContext(_threadId);
190}
191
192
193void
194SimpleThread::halt()
195{
196    if (status() == ThreadContext::Halted)
197        return;
198
199    _status = ThreadContext::Halted;
200    baseCpu->haltContext(_threadId);
201}
202
203
204void
205SimpleThread::regStats(const string &name)
206{
207    if (FullSystem && kernelStats)
208        kernelStats->regStats(name + ".kern");
209}
210
211void
212SimpleThread::copyArchRegs(ThreadContext *src_tc)
213{
214    TheISA::copyRegs(src_tc, tc);
215}
216
217// The following methods are defined in src/arch/alpha/ev5.cc for
218// Alpha.
219#if THE_ISA != ALPHA_ISA
220Fault
221SimpleThread::hwrei()
222{
223    return NoFault;
224}
225
226bool
227SimpleThread::simPalCheck(int palFunc)
228{
229    return true;
230}
231#endif
232