thread_context_impl.hh revision 5082:82dd253231c8 
1/*
2 * Copyright (c) 2004-2006 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: Kevin Lim
29 *          Korey Sewell
30 */
31
32#include "arch/regfile.hh"
33#include "cpu/o3/thread_context.hh"
34#include "cpu/quiesce_event.hh"
35
36#if FULL_SYSTEM
37template <class Impl>
38VirtualPort *
39O3ThreadContext<Impl>::getVirtPort(ThreadContext *src_tc)
40{
41    if (!src_tc)
42        return thread->getVirtPort();
43
44    VirtualPort *vp;
45
46    vp = new VirtualPort("tc-vport", src_tc);
47    thread->connectToMemFunc(vp);
48    return vp;
49}
50
51template <class Impl>
52void
53O3ThreadContext<Impl>::dumpFuncProfile()
54{
55    thread->dumpFuncProfile();
56}
57#endif
58
59template <class Impl>
60void
61O3ThreadContext<Impl>::takeOverFrom(ThreadContext *old_context)
62{
63    // some things should already be set up
64#if FULL_SYSTEM
65    assert(getSystemPtr() == old_context->getSystemPtr());
66#else
67    assert(getProcessPtr() == old_context->getProcessPtr());
68#endif
69
70    // copy over functional state
71    setStatus(old_context->status());
72    copyArchRegs(old_context);
73    setCpuId(old_context->readCpuId());
74
75#if !FULL_SYSTEM
76    thread->funcExeInst = old_context->readFuncExeInst();
77#else
78    EndQuiesceEvent *other_quiesce = old_context->getQuiesceEvent();
79    if (other_quiesce) {
80        // Point the quiesce event's TC at this TC so that it wakes up
81        // the proper CPU.
82        other_quiesce->tc = this;
83    }
84    if (thread->quiesceEvent) {
85        thread->quiesceEvent->tc = this;
86    }
87
88    // Transfer kernel stats from one CPU to the other.
89    thread->kernelStats = old_context->getKernelStats();
90//    storeCondFailures = 0;
91    cpu->lockFlag = false;
92#endif
93
94    old_context->setStatus(ThreadContext::Unallocated);
95
96    thread->inSyscall = false;
97    thread->trapPending = false;
98}
99
100#if FULL_SYSTEM
101template <class Impl>
102void
103O3ThreadContext<Impl>::delVirtPort(VirtualPort *vp)
104{
105    if (vp != thread->getVirtPort()) {
106        vp->removeConn();
107        delete vp;
108    }
109}
110#endif
111
112template <class Impl>
113void
114O3ThreadContext<Impl>::activate(int delay)
115{
116    DPRINTF(O3CPU, "Calling activate on Thread Context %d\n",
117            getThreadNum());
118
119    if (thread->status() == ThreadContext::Active)
120        return;
121
122#if FULL_SYSTEM
123    thread->lastActivate = curTick;
124#endif
125
126    if (thread->status() == ThreadContext::Unallocated) {
127        cpu->activateWhenReady(thread->readTid());
128        return;
129    }
130
131    thread->setStatus(ThreadContext::Active);
132
133    // status() == Suspended
134    cpu->activateContext(thread->readTid(), delay);
135}
136
137template <class Impl>
138void
139O3ThreadContext<Impl>::suspend()
140{
141    DPRINTF(O3CPU, "Calling suspend on Thread Context %d\n",
142            getThreadNum());
143
144    if (thread->status() == ThreadContext::Suspended)
145        return;
146
147#if FULL_SYSTEM
148    thread->lastActivate = curTick;
149    thread->lastSuspend = curTick;
150#endif
151/*
152#if FULL_SYSTEM
153    // Don't change the status from active if there are pending interrupts
154    if (cpu->check_interrupts()) {
155        assert(status() == ThreadContext::Active);
156        return;
157    }
158#endif
159*/
160    thread->setStatus(ThreadContext::Suspended);
161    cpu->suspendContext(thread->readTid());
162}
163
164template <class Impl>
165void
166O3ThreadContext<Impl>::deallocate(int delay)
167{
168    DPRINTF(O3CPU, "Calling deallocate on Thread Context %d delay %d\n",
169            getThreadNum(), delay);
170
171    if (thread->status() == ThreadContext::Unallocated)
172        return;
173
174    thread->setStatus(ThreadContext::Unallocated);
175    cpu->deallocateContext(thread->readTid(), true, delay);
176}
177
178template <class Impl>
179void
180O3ThreadContext<Impl>::halt()
181{
182    DPRINTF(O3CPU, "Calling halt on Thread Context %d\n",
183            getThreadNum());
184
185    if (thread->status() == ThreadContext::Halted)
186        return;
187
188    thread->setStatus(ThreadContext::Halted);
189    cpu->haltContext(thread->readTid());
190}
191
192template <class Impl>
193void
194O3ThreadContext<Impl>::regStats(const std::string &name)
195{
196#if FULL_SYSTEM
197    thread->kernelStats = new TheISA::Kernel::Statistics(cpu->system);
198    thread->kernelStats->regStats(name + ".kern");
199#endif
200}
201
202template <class Impl>
203void
204O3ThreadContext<Impl>::serialize(std::ostream &os)
205{
206#if FULL_SYSTEM
207    if (thread->kernelStats)
208        thread->kernelStats->serialize(os);
209#endif
210
211}
212
213template <class Impl>
214void
215O3ThreadContext<Impl>::unserialize(Checkpoint *cp, const std::string &section)
216{
217#if FULL_SYSTEM
218    if (thread->kernelStats)
219        thread->kernelStats->unserialize(cp, section);
220#endif
221
222}
223
224#if FULL_SYSTEM
225template <class Impl>
226Tick
227O3ThreadContext<Impl>::readLastActivate()
228{
229    return thread->lastActivate;
230}
231
232template <class Impl>
233Tick
234O3ThreadContext<Impl>::readLastSuspend()
235{
236    return thread->lastSuspend;
237}
238
239template <class Impl>
240void
241O3ThreadContext<Impl>::profileClear()
242{
243    thread->profileClear();
244}
245
246template <class Impl>
247void
248O3ThreadContext<Impl>::profileSample()
249{
250    thread->profileSample();
251}
252#endif
253
254template <class Impl>
255TheISA::MachInst
256O3ThreadContext<Impl>:: getInst()
257{
258    return thread->getInst();
259}
260
261template <class Impl>
262void
263O3ThreadContext<Impl>::copyArchRegs(ThreadContext *tc)
264{
265    // This function will mess things up unless the ROB is empty and
266    // there are no instructions in the pipeline.
267    unsigned tid = thread->readTid();
268    PhysRegIndex renamed_reg;
269
270    // First loop through the integer registers.
271    for (int i = 0; i < TheISA::NumIntRegs; ++i) {
272        renamed_reg = cpu->renameMap[tid].lookup(i);
273
274        DPRINTF(O3CPU, "Copying over register %i, had data %lli, "
275                "now has data %lli.\n",
276                renamed_reg, cpu->readIntReg(renamed_reg),
277                tc->readIntReg(i));
278
279        cpu->setIntReg(renamed_reg, tc->readIntReg(i));
280    }
281
282    // Then loop through the floating point registers.
283    for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
284        renamed_reg = cpu->renameMap[tid].lookup(i + TheISA::FP_Base_DepTag);
285        cpu->setFloatRegBits(renamed_reg,
286                             tc->readFloatRegBits(i));
287    }
288
289    // Copy the misc regs.
290    TheISA::copyMiscRegs(tc, this);
291
292    // Then finally set the PC and the next PC.
293    cpu->setPC(tc->readPC(), tid);
294    cpu->setNextPC(tc->readNextPC(), tid);
295#if !FULL_SYSTEM
296    this->thread->funcExeInst = tc->readFuncExeInst();
297#endif
298}
299
300template <class Impl>
301void
302O3ThreadContext<Impl>::clearArchRegs()
303{}
304
305template <class Impl>
306uint64_t
307O3ThreadContext<Impl>::readIntReg(int reg_idx)
308{
309    reg_idx = TheISA::flattenIntIndex(this, reg_idx);
310    return cpu->readArchIntReg(reg_idx, thread->readTid());
311}
312
313template <class Impl>
314TheISA::FloatReg
315O3ThreadContext<Impl>::readFloatReg(int reg_idx, int width)
316{
317    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
318    switch(width) {
319      case 32:
320        return cpu->readArchFloatRegSingle(reg_idx, thread->readTid());
321      case 64:
322        return cpu->readArchFloatRegDouble(reg_idx, thread->readTid());
323      default:
324        panic("Unsupported width!");
325        return 0;
326    }
327}
328
329template <class Impl>
330TheISA::FloatReg
331O3ThreadContext<Impl>::readFloatReg(int reg_idx)
332{
333    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
334    return cpu->readArchFloatRegSingle(reg_idx, thread->readTid());
335}
336
337template <class Impl>
338TheISA::FloatRegBits
339O3ThreadContext<Impl>::readFloatRegBits(int reg_idx, int width)
340{
341    DPRINTF(Fault, "Reading floatint register through the TC!\n");
342    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
343    return cpu->readArchFloatRegInt(reg_idx, thread->readTid());
344}
345
346template <class Impl>
347TheISA::FloatRegBits
348O3ThreadContext<Impl>::readFloatRegBits(int reg_idx)
349{
350    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
351    return cpu->readArchFloatRegInt(reg_idx, thread->readTid());
352}
353
354template <class Impl>
355void
356O3ThreadContext<Impl>::setIntReg(int reg_idx, uint64_t val)
357{
358    reg_idx = TheISA::flattenIntIndex(this, reg_idx);
359    cpu->setArchIntReg(reg_idx, val, thread->readTid());
360
361    // Squash if we're not already in a state update mode.
362    if (!thread->trapPending && !thread->inSyscall) {
363        cpu->squashFromTC(thread->readTid());
364    }
365}
366
367template <class Impl>
368void
369O3ThreadContext<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
370{
371    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
372    switch(width) {
373      case 32:
374        cpu->setArchFloatRegSingle(reg_idx, val, thread->readTid());
375        break;
376      case 64:
377        cpu->setArchFloatRegDouble(reg_idx, val, thread->readTid());
378        break;
379    }
380
381    // Squash if we're not already in a state update mode.
382    if (!thread->trapPending && !thread->inSyscall) {
383        cpu->squashFromTC(thread->readTid());
384    }
385}
386
387template <class Impl>
388void
389O3ThreadContext<Impl>::setFloatReg(int reg_idx, FloatReg val)
390{
391    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
392    cpu->setArchFloatRegSingle(reg_idx, val, thread->readTid());
393
394    if (!thread->trapPending && !thread->inSyscall) {
395        cpu->squashFromTC(thread->readTid());
396    }
397}
398
399template <class Impl>
400void
401O3ThreadContext<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val,
402                                             int width)
403{
404    DPRINTF(Fault, "Setting floatint register through the TC!\n");
405    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
406    cpu->setArchFloatRegInt(reg_idx, val, thread->readTid());
407
408    // Squash if we're not already in a state update mode.
409    if (!thread->trapPending && !thread->inSyscall) {
410        cpu->squashFromTC(thread->readTid());
411    }
412}
413
414template <class Impl>
415void
416O3ThreadContext<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
417{
418    reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
419    cpu->setArchFloatRegInt(reg_idx, val, thread->readTid());
420
421    // Squash if we're not already in a state update mode.
422    if (!thread->trapPending && !thread->inSyscall) {
423        cpu->squashFromTC(thread->readTid());
424    }
425}
426
427template <class Impl>
428void
429O3ThreadContext<Impl>::setPC(uint64_t val)
430{
431    cpu->setPC(val, thread->readTid());
432
433    // Squash if we're not already in a state update mode.
434    if (!thread->trapPending && !thread->inSyscall) {
435        cpu->squashFromTC(thread->readTid());
436    }
437}
438
439template <class Impl>
440void
441O3ThreadContext<Impl>::setNextPC(uint64_t val)
442{
443    cpu->setNextPC(val, thread->readTid());
444
445    // Squash if we're not already in a state update mode.
446    if (!thread->trapPending && !thread->inSyscall) {
447        cpu->squashFromTC(thread->readTid());
448    }
449}
450
451template <class Impl>
452void
453O3ThreadContext<Impl>::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
454{
455    cpu->setMiscRegNoEffect(misc_reg, val, thread->readTid());
456
457    // Squash if we're not already in a state update mode.
458    if (!thread->trapPending && !thread->inSyscall) {
459        cpu->squashFromTC(thread->readTid());
460    }
461}
462
463template <class Impl>
464void
465O3ThreadContext<Impl>::setMiscReg(int misc_reg,
466                                                const MiscReg &val)
467{
468    cpu->setMiscReg(misc_reg, val, thread->readTid());
469
470    // Squash if we're not already in a state update mode.
471    if (!thread->trapPending && !thread->inSyscall) {
472        cpu->squashFromTC(thread->readTid());
473    }
474}
475
476#if !FULL_SYSTEM
477
478template <class Impl>
479TheISA::IntReg
480O3ThreadContext<Impl>::getSyscallArg(int i)
481{
482    return cpu->getSyscallArg(i, thread->readTid());
483}
484
485template <class Impl>
486void
487O3ThreadContext<Impl>::setSyscallArg(int i, IntReg val)
488{
489    cpu->setSyscallArg(i, val, thread->readTid());
490}
491
492template <class Impl>
493void
494O3ThreadContext<Impl>::setSyscallReturn(SyscallReturn return_value)
495{
496    cpu->setSyscallReturn(return_value, thread->readTid());
497}
498
499#endif // FULL_SYSTEM
500
501