summaryrefslogtreecommitdiff
path: root/src/cpu/simple_thread.cc
blob: 28d8bdf62b789cabde38e6392016cd0ecaee7a1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
/*
 * Copyright (c) 2001-2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Steve Reinhardt
 *          Nathan Binkert
 *          Lisa Hsu
 *          Kevin Lim
 */

#include <string>

#include "arch/isa_traits.hh"
#include "cpu/base.hh"
#include "cpu/simple_thread.hh"
#include "cpu/thread_context.hh"

#if FULL_SYSTEM
#include "base/callback.hh"
#include "base/cprintf.hh"
#include "base/output.hh"
#include "base/trace.hh"
#include "cpu/profile.hh"
#include "cpu/quiesce_event.hh"
#include "kern/kernel_stats.hh"
#include "sim/serialize.hh"
#include "sim/sim_exit.hh"
#include "arch/stacktrace.hh"
#else
#include "sim/process.hh"
#include "sim/system.hh"
#include "mem/translating_port.hh"
#endif

using namespace std;

// constructor
#if FULL_SYSTEM
SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
                           AlphaITB *_itb, AlphaDTB *_dtb,
                           bool use_kernel_stats)
    : ThreadState(_cpu, -1, _thread_num), cpu(_cpu), system(_sys), itb(_itb),
      dtb(_dtb)

{
    tc = new ProxyThreadContext<SimpleThread>(this);

    quiesceEvent = new EndQuiesceEvent(tc);

    regs.clear();

    if (cpu->params->profile) {
        profile = new FunctionProfile(system->kernelSymtab);
        Callback *cb =
            new MakeCallback<SimpleThread,
            &SimpleThread::dumpFuncProfile>(this);
        registerExitCallback(cb);
    }

    // let's fill with a dummy node for now so we don't get a segfault
    // on the first cycle when there's no node available.
    static ProfileNode dummyNode;
    profileNode = &dummyNode;
    profilePC = 3;

    if (use_kernel_stats) {
        kernelStats = new Kernel::Statistics(system);
    } else {
        kernelStats = NULL;
    }
    Port *mem_port;
    physPort = new FunctionalPort(csprintf("%s-%d-funcport",
                                           cpu->name(), tid));
    mem_port = system->physmem->getPort("functional");
    mem_port->setPeer(physPort);
    physPort->setPeer(mem_port);

    virtPort = new VirtualPort(csprintf("%s-%d-vport",
                                        cpu->name(), tid));
    mem_port = system->physmem->getPort("functional");
    mem_port->setPeer(virtPort);
    virtPort->setPeer(mem_port);
}
#else
SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num,
                         Process *_process, int _asid)
    : ThreadState(_cpu, -1, _thread_num, _process, _asid),
      cpu(_cpu)
{
    regs.clear();
    tc = new ProxyThreadContext<SimpleThread>(this);
}

#endif

SimpleThread::SimpleThread()
#if FULL_SYSTEM
    : ThreadState(NULL, -1, -1)
#else
    : ThreadState(NULL, -1, -1, NULL, -1)
#endif
{
    tc = new ProxyThreadContext<SimpleThread>(this);
    regs.clear();
}

SimpleThread::~SimpleThread()
{
    delete tc;
}

void
SimpleThread::takeOverFrom(ThreadContext *oldContext)
{
    // some things should already be set up
#if FULL_SYSTEM
    assert(system == oldContext->getSystemPtr());
#else
    assert(process == oldContext->getProcessPtr());
#endif

    copyState(oldContext);
#if FULL_SYSTEM
    EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
    if (quiesce) {
        // Point the quiesce event's TC at this TC so that it wakes up
        // the proper CPU.
        quiesce->tc = tc;
    }
    if (quiesceEvent) {
        quiesceEvent->tc = tc;
    }

    Kernel::Statistics *stats = oldContext->getKernelStats();
    if (stats) {
        kernelStats = stats;
    }
#endif

    storeCondFailures = 0;

    oldContext->setStatus(ThreadContext::Unallocated);
}

void
SimpleThread::copyTC(ThreadContext *context)
{
    copyState(context);

#if FULL_SYSTEM
    EndQuiesceEvent *quiesce = context->getQuiesceEvent();
    if (quiesce) {
        quiesceEvent = quiesce;
    }
    Kernel::Statistics *stats = context->getKernelStats();
    if (stats) {
        kernelStats = stats;
    }
#endif
}

void
SimpleThread::copyState(ThreadContext *oldContext)
{
    // copy over functional state
    _status = oldContext->status();
    copyArchRegs(oldContext);
    cpuId = oldContext->readCpuId();
#if !FULL_SYSTEM
    funcExeInst = oldContext->readFuncExeInst();
#endif
    inst = oldContext->getInst();
}

void
SimpleThread::serialize(ostream &os)
{
    ThreadState::serialize(os);
    regs.serialize(os);
    // thread_num and cpu_id are deterministic from the config
}


void
SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
{
    ThreadState::unserialize(cp, section);
    regs.unserialize(cp, section);
    // thread_num and cpu_id are deterministic from the config
}

#if FULL_SYSTEM
void
SimpleThread::dumpFuncProfile()
{
    std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
    profile->dump(tc, *os);
}
#endif

void
SimpleThread::activate(int delay)
{
    if (status() == ThreadContext::Active)
        return;

    lastActivate = curTick;

    if (status() == ThreadContext::Unallocated) {
        cpu->activateWhenReady(tid);
        return;
    }

    _status = ThreadContext::Active;

    // status() == Suspended
    cpu->activateContext(tid, delay);
}

void
SimpleThread::suspend()
{
    if (status() == ThreadContext::Suspended)
        return;

    lastActivate = curTick;
    lastSuspend = curTick;
/*
#if FULL_SYSTEM
    // Don't change the status from active if there are pending interrupts
    if (cpu->check_interrupts()) {
        assert(status() == ThreadContext::Active);
        return;
    }
#endif
*/
    _status = ThreadContext::Suspended;
    cpu->suspendContext(tid);
}

void
SimpleThread::deallocate()
{
    if (status() == ThreadContext::Unallocated)
        return;

    _status = ThreadContext::Unallocated;
    cpu->deallocateContext(tid);
}

void
SimpleThread::halt()
{
    if (status() == ThreadContext::Halted)
        return;

    _status = ThreadContext::Halted;
    cpu->haltContext(tid);
}


void
SimpleThread::regStats(const string &name)
{
#if FULL_SYSTEM
    if (kernelStats)
        kernelStats->regStats(name + ".kern");
#endif
}

void
SimpleThread::copyArchRegs(ThreadContext *src_tc)
{
    TheISA::copyRegs(src_tc, tc);
}

#if FULL_SYSTEM
VirtualPort*
SimpleThread::getVirtPort(ThreadContext *src_tc)
{
    if (!src_tc)
        return virtPort;

    VirtualPort *vp;
    Port *mem_port;

    vp = new VirtualPort("tc-vport", src_tc);
    mem_port = system->physmem->getPort("functional");
    mem_port->setPeer(vp);
    vp->setPeer(mem_port);
    return vp;
}

void
SimpleThread::delVirtPort(VirtualPort *vp)
{
    if (vp != virtPort) {
        delete vp->getPeer();
        delete vp;
    }
}

#endif