simple_thread.cc revision 3125:febd811bccc6 
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(-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, MemObject* memobj)
110    : ThreadState(-1, _thread_num, _process, _asid, memobj),
111      cpu(_cpu)
112{
113    /* Use this port to for syscall emulation writes to memory. */
114    Port *mem_port;
115    port = new TranslatingPort(csprintf("%s-%d-funcport",
116                                        cpu->name(), tid),
117                               process->pTable, false);
118    mem_port = memobj->getPort("functional");
119    mem_port->setPeer(port);
120    port->setPeer(mem_port);
121
122    regs.clear();
123    tc = new ProxyThreadContext<SimpleThread>(this);
124}
125
126#endif
127
128SimpleThread::SimpleThread()
129#if FULL_SYSTEM
130    : ThreadState(-1, -1)
131#else
132    : ThreadState(-1, -1, NULL, -1, NULL)
133#endif
134{
135    tc = new ProxyThreadContext<SimpleThread>(this);
136    regs.clear();
137}
138
139SimpleThread::~SimpleThread()
140{
141    delete tc;
142}
143
144void
145SimpleThread::takeOverFrom(ThreadContext *oldContext)
146{
147    // some things should already be set up
148#if FULL_SYSTEM
149    assert(system == oldContext->getSystemPtr());
150#else
151    assert(process == oldContext->getProcessPtr());
152#endif
153
154    copyState(oldContext);
155#if FULL_SYSTEM
156    EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent();
157    if (quiesce) {
158        // Point the quiesce event's TC at this TC so that it wakes up
159        // the proper CPU.
160        quiesce->tc = tc;
161    }
162    if (quiesceEvent) {
163        quiesceEvent->tc = tc;
164    }
165
166    Kernel::Statistics *stats = oldContext->getKernelStats();
167    if (stats) {
168        kernelStats = stats;
169    }
170#endif
171
172    storeCondFailures = 0;
173
174    oldContext->setStatus(ThreadContext::Unallocated);
175}
176
177void
178SimpleThread::copyTC(ThreadContext *context)
179{
180    copyState(context);
181
182#if FULL_SYSTEM
183    EndQuiesceEvent *quiesce = context->getQuiesceEvent();
184    if (quiesce) {
185        quiesceEvent = quiesce;
186    }
187    Kernel::Statistics *stats = context->getKernelStats();
188    if (stats) {
189        kernelStats = stats;
190    }
191#endif
192}
193
194void
195SimpleThread::copyState(ThreadContext *oldContext)
196{
197    // copy over functional state
198    _status = oldContext->status();
199    copyArchRegs(oldContext);
200    cpuId = oldContext->readCpuId();
201#if !FULL_SYSTEM
202    funcExeInst = oldContext->readFuncExeInst();
203#endif
204    inst = oldContext->getInst();
205}
206
207void
208SimpleThread::serialize(ostream &os)
209{
210    ThreadState::serialize(os);
211    regs.serialize(os);
212    // thread_num and cpu_id are deterministic from the config
213}
214
215
216void
217SimpleThread::unserialize(Checkpoint *cp, const std::string &section)
218{
219    ThreadState::unserialize(cp, section);
220    regs.unserialize(cp, section);
221    // thread_num and cpu_id are deterministic from the config
222}
223
224#if FULL_SYSTEM
225void
226SimpleThread::dumpFuncProfile()
227{
228    std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
229    profile->dump(tc, *os);
230}
231#endif
232
233void
234SimpleThread::activate(int delay)
235{
236    if (status() == ThreadContext::Active)
237        return;
238
239    lastActivate = curTick;
240
241    if (status() == ThreadContext::Unallocated) {
242        cpu->activateWhenReady(tid);
243        return;
244    }
245
246    _status = ThreadContext::Active;
247
248    // status() == Suspended
249    cpu->activateContext(tid, delay);
250}
251
252void
253SimpleThread::suspend()
254{
255    if (status() == ThreadContext::Suspended)
256        return;
257
258    lastActivate = curTick;
259    lastSuspend = curTick;
260/*
261#if FULL_SYSTEM
262    // Don't change the status from active if there are pending interrupts
263    if (cpu->check_interrupts()) {
264        assert(status() == ThreadContext::Active);
265        return;
266    }
267#endif
268*/
269    _status = ThreadContext::Suspended;
270    cpu->suspendContext(tid);
271}
272
273void
274SimpleThread::deallocate()
275{
276    if (status() == ThreadContext::Unallocated)
277        return;
278
279    _status = ThreadContext::Unallocated;
280    cpu->deallocateContext(tid);
281}
282
283void
284SimpleThread::halt()
285{
286    if (status() == ThreadContext::Halted)
287        return;
288
289    _status = ThreadContext::Halted;
290    cpu->haltContext(tid);
291}
292
293
294void
295SimpleThread::regStats(const string &name)
296{
297#if FULL_SYSTEM
298    if (kernelStats)
299        kernelStats->regStats(name + ".kern");
300#endif
301}
302
303void
304SimpleThread::copyArchRegs(ThreadContext *src_tc)
305{
306    TheISA::copyRegs(src_tc, tc);
307}
308
309#if FULL_SYSTEM
310VirtualPort*
311SimpleThread::getVirtPort(ThreadContext *src_tc)
312{
313    if (!src_tc)
314        return virtPort;
315
316    VirtualPort *vp;
317    Port *mem_port;
318
319    vp = new VirtualPort("tc-vport", src_tc);
320    mem_port = system->physmem->getPort("functional");
321    mem_port->setPeer(vp);
322    vp->setPeer(mem_port);
323    return vp;
324}
325
326void
327SimpleThread::delVirtPort(VirtualPort *vp)
328{
329    if (vp != virtPort) {
330        delete vp->getPeer();
331        delete vp;
332    }
333}
334
335
336#endif
337
338