simple_thread.cc revision 3486:11b71489efd6 
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 "cpu/base.hh"
38#include "cpu/simple_thread.hh"
39#include "cpu/thread_context.hh"
40
41#if FULL_SYSTEM
42#include "base/callback.hh"
43#include "base/cprintf.hh"
44#include "base/output.hh"
45#include "base/trace.hh"
46#include "cpu/profile.hh"
47#include "cpu/quiesce_event.hh"
48#include "kern/kernel_stats.hh"
49#include "sim/serialize.hh"
50#include "sim/sim_exit.hh"
51#include "arch/stacktrace.hh"
52#else
53#include "sim/process.hh"
54#include "sim/system.hh"
55#include "mem/translating_port.hh"
56#endif
57
58using namespace std;
59
60// constructor
61#if FULL_SYSTEM
62SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys,
63                           AlphaITB *_itb, AlphaDTB *_dtb,
64                           bool use_kernel_stats)
65    : ThreadState(_cpu, -1, _thread_num), cpu(_cpu), system(_sys), itb(_itb),
66      dtb(_dtb)
67
68{
69    tc = new ProxyThreadContext<SimpleThread>(this);
70
71    quiesceEvent = new EndQuiesceEvent(tc);
72
73    regs.clear();
74
75    if (cpu->params->profile) {
76        profile = new FunctionProfile(system->kernelSymtab);
77        Callback *cb =
78            new MakeCallback<SimpleThread,
79            &SimpleThread::dumpFuncProfile>(this);
80        registerExitCallback(cb);
81    }
82
83    // let's fill with a dummy node for now so we don't get a segfault
84    // on the first cycle when there's no node available.
85    static ProfileNode dummyNode;
86    profileNode = &dummyNode;
87    profilePC = 3;
88
89    if (use_kernel_stats) {
90        kernelStats = new Kernel::Statistics(system);
91    } else {
92        kernelStats = NULL;
93    }
94    Port *mem_port;
95    physPort = new FunctionalPort(csprintf("%s-%d-funcport",
96                                           cpu->name(), tid));
97    mem_port = system->physmem->getPort("functional");
98    mem_port->setPeer(physPort);
99    physPort->setPeer(mem_port);
100
101    virtPort = new VirtualPort(csprintf("%s-%d-vport",
102                                        cpu->name(), tid));
103    mem_port = system->physmem->getPort("functional");
104    mem_port->setPeer(virtPort);
105    virtPort->setPeer(mem_port);
106}
107#else
108SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num,
109                         Process *_process, int _asid)
110    : ThreadState(_cpu, -1, _thread_num, _process, _asid),
111      cpu(_cpu)
112{
113    regs.clear();
114    tc = new ProxyThreadContext<SimpleThread>(this);
115}
116
117#endif
118
119SimpleThread::SimpleThread()
120#if FULL_SYSTEM
121    : ThreadState(NULL, -1, -1)
122#else
123    : ThreadState(NULL, -1, -1, NULL, -1)
124#endif
125{
126    tc = new ProxyThreadContext<SimpleThread>(this);
127    regs.clear();
128}
129
130SimpleThread::~SimpleThread()
131{
132#if FULL_SYSTEM
133    delete physPort;
134    delete virtPort;
135#endif
136    delete tc;
137}
138
139void
140SimpleThread::takeOverFrom(ThreadContext *oldContext)
141{
142    // some things should already be set up
143#if FULL_SYSTEM
144    assert(system == oldContext->getSystemPtr());
145#else
146    assert(process == oldContext->getProcessPtr());
147#endif
148
149    copyState(oldContext);
150#if FULL_SYSTEM
151    EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
152    if (quiesce) {
153        // Point the quiesce event's TC at this TC so that it wakes up
154        // the proper CPU.
155        quiesce->tc = tc;
156    }
157    if (quiesceEvent) {
158        quiesceEvent->tc = tc;
159    }
160
161    Kernel::Statistics *stats = oldContext->getKernelStats();
162    if (stats) {
163        kernelStats = stats;
164    }
165#endif
166
167    storeCondFailures = 0;
168
169    oldContext->setStatus(ThreadContext::Unallocated);
170}
171
172void
173SimpleThread::copyTC(ThreadContext *context)
174{
175    copyState(context);
176
177#if FULL_SYSTEM
178    EndQuiesceEvent *quiesce = context->getQuiesceEvent();
179    if (quiesce) {
180        quiesceEvent = quiesce;
181    }
182    Kernel::Statistics *stats = context->getKernelStats();
183    if (stats) {
184        kernelStats = stats;
185    }
186#endif
187}
188
189void
190SimpleThread::copyState(ThreadContext *oldContext)
191{
192    // copy over functional state
193    _status = oldContext->status();
194    copyArchRegs(oldContext);
195    cpuId = oldContext->readCpuId();
196#if !FULL_SYSTEM
197    funcExeInst = oldContext->readFuncExeInst();
198#endif
199    inst = oldContext->getInst();
200}
201
202void
203SimpleThread::serialize(ostream &os)
204{
205    ThreadState::serialize(os);
206    regs.serialize(os);
207    // thread_num and cpu_id are deterministic from the config
208}
209
210
211void
212SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
213{
214    ThreadState::unserialize(cp, section);
215    regs.unserialize(cp, section);
216    // thread_num and cpu_id are deterministic from the config
217}
218
219#if FULL_SYSTEM
220void
221SimpleThread::dumpFuncProfile()
222{
223    std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
224    profile->dump(tc, *os);
225}
226#endif
227
228void
229SimpleThread::activate(int delay)
230{
231    if (status() == ThreadContext::Active)
232        return;
233
234    lastActivate = curTick;
235
236    if (status() == ThreadContext::Unallocated) {
237        cpu->activateWhenReady(tid);
238        return;
239    }
240
241    _status = ThreadContext::Active;
242
243    // status() == Suspended
244    cpu->activateContext(tid, delay);
245}
246
247void
248SimpleThread::suspend()
249{
250    if (status() == ThreadContext::Suspended)
251        return;
252
253    lastActivate = curTick;
254    lastSuspend = curTick;
255/*
256#if FULL_SYSTEM
257    // Don't change the status from active if there are pending interrupts
258    if (cpu->check_interrupts()) {
259        assert(status() == ThreadContext::Active);
260        return;
261    }
262#endif
263*/
264    _status = ThreadContext::Suspended;
265    cpu->suspendContext(tid);
266}
267
268void
269SimpleThread::deallocate()
270{
271    if (status() == ThreadContext::Unallocated)
272        return;
273
274    _status = ThreadContext::Unallocated;
275    cpu->deallocateContext(tid);
276}
277
278void
279SimpleThread::halt()
280{
281    if (status() == ThreadContext::Halted)
282        return;
283
284    _status = ThreadContext::Halted;
285    cpu->haltContext(tid);
286}
287
288
289void
290SimpleThread::regStats(const string &name)
291{
292#if FULL_SYSTEM
293    if (kernelStats)
294        kernelStats->regStats(name + ".kern");
295#endif
296}
297
298void
299SimpleThread::copyArchRegs(ThreadContext *src_tc)
300{
301    TheISA::copyRegs(src_tc, tc);
302}
303
304#if FULL_SYSTEM
305VirtualPort*
306SimpleThread::getVirtPort(ThreadContext *src_tc)
307{
308    if (!src_tc)
309        return virtPort;
310
311    VirtualPort *vp = new VirtualPort("tc-vport", src_tc);
312    Port *mem_port = getMemFuncPort();
313
314    mem_port->setPeer(vp);
315    vp->setPeer(mem_port);
316    return vp;
317}
318
319void
320SimpleThread::delVirtPort(VirtualPort *vp)
321{
322    if (vp != virtPort) {
323        delete vp->getPeer();
324        delete vp;
325    }
326}
327
328#endif
329
330