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()
40{
41 return thread->getVirtPort();
42}
43
44template <class Impl>
45void
46O3ThreadContext<Impl>::dumpFuncProfile()
47{
48 thread->dumpFuncProfile();
49}
50#endif
51
52template <class Impl>
53void
54O3ThreadContext<Impl>::takeOverFrom(ThreadContext *old_context)
55{
56 // some things should already be set up
57#if FULL_SYSTEM
58 assert(getSystemPtr() == old_context->getSystemPtr());
59#else
60 assert(getProcessPtr() == old_context->getProcessPtr());
61#endif
62
63 // copy over functional state
64 setStatus(old_context->status());
65 copyArchRegs(old_context);
66
67#if !FULL_SYSTEM
68 thread->funcExeInst = old_context->readFuncExeInst();
69#else
70 EndQuiesceEvent *other_quiesce = old_context->getQuiesceEvent();
71 if (other_quiesce) {
72 // Point the quiesce event's TC at this TC so that it wakes up
73 // the proper CPU.
74 other_quiesce->tc = this;
75 }
76 if (thread->quiesceEvent) {
77 thread->quiesceEvent->tc = this;
78 }
79
80 // Transfer kernel stats from one CPU to the other.
81 thread->kernelStats = old_context->getKernelStats();
82// storeCondFailures = 0;
83 cpu->lockFlag = false;
84#endif
85
86 old_context->setStatus(ThreadContext::Unallocated);
87
88 thread->inSyscall = false;
89 thread->trapPending = false;
90}
91
92template <class Impl>
93void
94O3ThreadContext<Impl>::activate(int delay)
95{
96 DPRINTF(O3CPU, "Calling activate on Thread Context %d\n",
97 getThreadNum());
98
99 if (thread->status() == ThreadContext::Active)
100 return;
101
102#if FULL_SYSTEM
103 thread->lastActivate = curTick;
104#endif
105
106 if (thread->status() == ThreadContext::Unallocated) {
107 cpu->activateWhenReady(thread->readTid());
108 return;
109 }
110
111 thread->setStatus(ThreadContext::Active);
112
113 // status() == Suspended
114 cpu->activateContext(thread->readTid(), delay);
115}
116
117template <class Impl>
118void
119O3ThreadContext<Impl>::suspend(int delay)
120{
121 DPRINTF(O3CPU, "Calling suspend on Thread Context %d\n",
122 getThreadNum());
123
124 if (thread->status() == ThreadContext::Suspended)
125 return;
126
127#if FULL_SYSTEM
128 thread->lastActivate = curTick;
129 thread->lastSuspend = curTick;
130#endif
131/*
132#if FULL_SYSTEM
133 // Don't change the status from active if there are pending interrupts
134 if (cpu->checkInterrupts()) {
135 assert(status() == ThreadContext::Active);
136 return;
137 }
138#endif
139*/
140 thread->setStatus(ThreadContext::Suspended);
141 cpu->suspendContext(thread->readTid());
142}
143
144template <class Impl>
145void
146O3ThreadContext<Impl>::deallocate(int delay)
147{
148 DPRINTF(O3CPU, "Calling deallocate on Thread Context %d delay %d\n",
149 getThreadNum(), delay);
150
151 if (thread->status() == ThreadContext::Unallocated)
152 return;
153
154 thread->setStatus(ThreadContext::Unallocated);
155 cpu->deallocateContext(thread->readTid(), true, delay);
156}
157
158template <class Impl>
159void
160O3ThreadContext<Impl>::halt(int delay)
161{
162 DPRINTF(O3CPU, "Calling halt on Thread Context %d\n",
163 getThreadNum());
164
165 if (thread->status() == ThreadContext::Halted)
166 return;
167
168 thread->setStatus(ThreadContext::Halted);
169 cpu->haltContext(thread->readTid());
170}
171
172template <class Impl>
173void
174O3ThreadContext<Impl>::regStats(const std::string &name)
175{
176#if FULL_SYSTEM
177 thread->kernelStats = new TheISA::Kernel::Statistics(cpu->system);
178 thread->kernelStats->regStats(name + ".kern");
179#endif
180}
181
182template <class Impl>
183void
184O3ThreadContext<Impl>::serialize(std::ostream &os)
185{
186#if FULL_SYSTEM
187 if (thread->kernelStats)
188 thread->kernelStats->serialize(os);
189#endif
190
191}
192
193template <class Impl>
194void
195O3ThreadContext<Impl>::unserialize(Checkpoint *cp, const std::string &section)
196{
197#if FULL_SYSTEM
198 if (thread->kernelStats)
199 thread->kernelStats->unserialize(cp, section);
200#endif
201
202}
203
204#if FULL_SYSTEM
205template <class Impl>
206Tick
207O3ThreadContext<Impl>::readLastActivate()
208{
209 return thread->lastActivate;
210}
211
212template <class Impl>
213Tick
214O3ThreadContext<Impl>::readLastSuspend()
215{
216 return thread->lastSuspend;
217}
218
219template <class Impl>
220void
221O3ThreadContext<Impl>::profileClear()
222{
223 thread->profileClear();
224}
225
226template <class Impl>
227void
228O3ThreadContext<Impl>::profileSample()
229{
230 thread->profileSample();
231}
232#endif
233
234template <class Impl>
235TheISA::MachInst
236O3ThreadContext<Impl>:: getInst()
237{
238 return thread->getInst();
239}
240
241template <class Impl>
242void
243O3ThreadContext<Impl>::copyArchRegs(ThreadContext *tc)
244{
245 // This function will mess things up unless the ROB is empty and
246 // there are no instructions in the pipeline.
247 unsigned tid = thread->readTid();
248 PhysRegIndex renamed_reg;
249
250 // First loop through the integer registers.
251 for (int i = 0; i < TheISA::NumIntRegs; ++i) {
252 renamed_reg = cpu->renameMap[tid].lookup(i);
253
254 DPRINTF(O3CPU, "Copying over register %i, had data %lli, "
255 "now has data %lli.\n",
256 renamed_reg, cpu->readIntReg(renamed_reg),
257 tc->readIntReg(i));
258
259 cpu->setIntReg(renamed_reg, tc->readIntReg(i));
260 }
261
262 // Then loop through the floating point registers.
263 for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
264 renamed_reg = cpu->renameMap[tid].lookup(i + TheISA::FP_Base_DepTag);
265 cpu->setFloatRegBits(renamed_reg,
266 tc->readFloatRegBits(i));
267 }
268
269 // Copy the misc regs.
270 TheISA::copyMiscRegs(tc, this);
271
272 // Then finally set the PC, the next PC, the nextNPC, the micropc, and the
273 // next micropc.
274 cpu->setPC(tc->readPC(), tid);
275 cpu->setNextPC(tc->readNextPC(), tid);
276 cpu->setNextNPC(tc->readNextNPC(), tid);
277 cpu->setMicroPC(tc->readMicroPC(), tid);
278 cpu->setNextMicroPC(tc->readNextMicroPC(), tid);
279#if !FULL_SYSTEM
280 this->thread->funcExeInst = tc->readFuncExeInst();
281#endif
282}
283
284template <class Impl>
285void
286O3ThreadContext<Impl>::clearArchRegs()
287{}
288
289template <class Impl>
290uint64_t
291O3ThreadContext<Impl>::readIntReg(int reg_idx)
292{
293 reg_idx = TheISA::flattenIntIndex(this, reg_idx);
294 return cpu->readArchIntReg(reg_idx, thread->readTid());
295}
296
297template <class Impl>
298TheISA::FloatReg
299O3ThreadContext<Impl>::readFloatReg(int reg_idx, int width)
300{
301 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
302 switch(width) {
303 case 32:
304 return cpu->readArchFloatRegSingle(reg_idx, thread->readTid());
305 case 64:
306 return cpu->readArchFloatRegDouble(reg_idx, thread->readTid());
307 default:
308 panic("Unsupported width!");
309 return 0;
310 }
311}
312
313template <class Impl>
314TheISA::FloatReg
315O3ThreadContext<Impl>::readFloatReg(int reg_idx)
316{
317 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
318 return cpu->readArchFloatRegSingle(reg_idx, thread->readTid());
319}
320
321template <class Impl>
322TheISA::FloatRegBits
323O3ThreadContext<Impl>::readFloatRegBits(int reg_idx, int width)
324{
325 DPRINTF(Fault, "Reading floatint register through the TC!\n");
326 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
327 return cpu->readArchFloatRegInt(reg_idx, thread->readTid());
328}
329
330template <class Impl>
331TheISA::FloatRegBits
332O3ThreadContext<Impl>::readFloatRegBits(int reg_idx)
333{
334 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
335 return cpu->readArchFloatRegInt(reg_idx, thread->readTid());
336}
337
338template <class Impl>
339void
340O3ThreadContext<Impl>::setIntReg(int reg_idx, uint64_t val)
341{
342 reg_idx = TheISA::flattenIntIndex(this, reg_idx);
343 cpu->setArchIntReg(reg_idx, val, thread->readTid());
344
345 // Squash if we're not already in a state update mode.
346 if (!thread->trapPending && !thread->inSyscall) {
347 cpu->squashFromTC(thread->readTid());
348 }
349}
350
351template <class Impl>
352void
353O3ThreadContext<Impl>::setFloatReg(int reg_idx, FloatReg val, int width)
354{
355 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
356 switch(width) {
357 case 32:
358 cpu->setArchFloatRegSingle(reg_idx, val, thread->readTid());
359 break;
360 case 64:
361 cpu->setArchFloatRegDouble(reg_idx, val, thread->readTid());
362 break;
363 }
364
365 // Squash if we're not already in a state update mode.
366 if (!thread->trapPending && !thread->inSyscall) {
367 cpu->squashFromTC(thread->readTid());
368 }
369}
370
371template <class Impl>
372void
373O3ThreadContext<Impl>::setFloatReg(int reg_idx, FloatReg val)
374{
375 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
376 cpu->setArchFloatRegSingle(reg_idx, val, thread->readTid());
377
378 if (!thread->trapPending && !thread->inSyscall) {
379 cpu->squashFromTC(thread->readTid());
380 }
381}
382
383template <class Impl>
384void
385O3ThreadContext<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val,
386 int width)
387{
388 DPRINTF(Fault, "Setting floatint register through the TC!\n");
389 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
390 cpu->setArchFloatRegInt(reg_idx, val, thread->readTid());
391
392 // Squash if we're not already in a state update mode.
393 if (!thread->trapPending && !thread->inSyscall) {
394 cpu->squashFromTC(thread->readTid());
395 }
396}
397
398template <class Impl>
399void
400O3ThreadContext<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val)
401{
402 reg_idx = TheISA::flattenFloatIndex(this, reg_idx);
403 cpu->setArchFloatRegInt(reg_idx, val, thread->readTid());
404
405 // Squash if we're not already in a state update mode.
406 if (!thread->trapPending && !thread->inSyscall) {
407 cpu->squashFromTC(thread->readTid());
408 }
409}
410
411template <class Impl>
412void
413O3ThreadContext<Impl>::setPC(uint64_t val)
414{
415 cpu->setPC(val, thread->readTid());
416
417 // Squash if we're not already in a state update mode.
418 if (!thread->trapPending && !thread->inSyscall) {
419 cpu->squashFromTC(thread->readTid());
420 }
421}
422
423template <class Impl>
424void
425O3ThreadContext<Impl>::setNextPC(uint64_t val)
426{
427 cpu->setNextPC(val, thread->readTid());
428
429 // Squash if we're not already in a state update mode.
430 if (!thread->trapPending && !thread->inSyscall) {
431 cpu->squashFromTC(thread->readTid());
432 }
433}
434
435template <class Impl>
436void
437O3ThreadContext<Impl>::setMicroPC(uint64_t val)
438{
439 cpu->setMicroPC(val, thread->readTid());
440
441 // Squash if we're not already in a state update mode.
442 if (!thread->trapPending && !thread->inSyscall) {
443 cpu->squashFromTC(thread->readTid());
444 }
445}
446
447template <class Impl>
448void
449O3ThreadContext<Impl>::setNextMicroPC(uint64_t val)
450{
451 cpu->setNextMicroPC(val, thread->readTid());
452
453 // Squash if we're not already in a state update mode.
454 if (!thread->trapPending && !thread->inSyscall) {
455 cpu->squashFromTC(thread->readTid());
456 }
457}
458
459template <class Impl>
460void
461O3ThreadContext<Impl>::setMiscRegNoEffect(int misc_reg, const MiscReg &val)
462{
463 cpu->setMiscRegNoEffect(misc_reg, val, thread->readTid());
464
465 // Squash if we're not already in a state update mode.
466 if (!thread->trapPending && !thread->inSyscall) {
467 cpu->squashFromTC(thread->readTid());
468 }
469}
470
471template <class Impl>
472void
473O3ThreadContext<Impl>::setMiscReg(int misc_reg,
474 const MiscReg &val)
475{
476 cpu->setMiscReg(misc_reg, val, thread->readTid());
477
478 // Squash if we're not already in a state update mode.
479 if (!thread->trapPending && !thread->inSyscall) {
480 cpu->squashFromTC(thread->readTid());
481 }
482}
483
484#if !FULL_SYSTEM
485
486template <class Impl>
487TheISA::IntReg
488O3ThreadContext<Impl>::getSyscallArg(int i)
489{
490 return cpu->getSyscallArg(i, thread->readTid());
491}
492
493template <class Impl>
494void
495O3ThreadContext<Impl>::setSyscallArg(int i, IntReg val)
496{
497 cpu->setSyscallArg(i, val, thread->readTid());
498}
499
500template <class Impl>
501void
502O3ThreadContext<Impl>::setSyscallReturn(SyscallReturn return_value)
503{
504 cpu->setSyscallReturn(return_value, thread->readTid());
505}
506
507#endif // FULL_SYSTEM
508