1/*
2 * Copyright (c) 2002-2005 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 */
30
31#include "arch/locked_mem.hh"
32#include "arch/mmaped_ipr.hh"
33#include "arch/utility.hh"
34#include "base/bigint.hh"
35#include "cpu/exetrace.hh"
36#include "cpu/simple/timing.hh"
37#include "mem/packet.hh"
38#include "mem/packet_access.hh"
39#include "params/TimingSimpleCPU.hh"
40#include "sim/system.hh"
41
42using namespace std;
43using namespace TheISA;
44
45Port *
46TimingSimpleCPU::getPort(const std::string &if_name, int idx)
47{
48 if (if_name == "dcache_port")
49 return &dcachePort;
50 else if (if_name == "icache_port")
51 return &icachePort;
52 else
53 panic("No Such Port\n");
54}
55
56void
57TimingSimpleCPU::init()
58{
59 BaseCPU::init();
60 cpuId = tc->readCpuId();
61#if FULL_SYSTEM
62 for (int i = 0; i < threadContexts.size(); ++i) {
63 ThreadContext *tc = threadContexts[i];
64
65 // initialize CPU, including PC
66 TheISA::initCPU(tc, cpuId);
67 }
68#endif
69}
70
71Tick
72TimingSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt)
73{
74 panic("TimingSimpleCPU doesn't expect recvAtomic callback!");
75 return curTick;
76}
77
78void
79TimingSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt)
80{
81 //No internal storage to update, jusst return
82 return;
83}
84
85void
86TimingSimpleCPU::CpuPort::recvStatusChange(Status status)
87{
88 if (status == RangeChange) {
89 if (!snoopRangeSent) {
90 snoopRangeSent = true;
91 sendStatusChange(Port::RangeChange);
92 }
93 return;
94 }
95
96 panic("TimingSimpleCPU doesn't expect recvStatusChange callback!");
97}
98
99
100void
101TimingSimpleCPU::CpuPort::TickEvent::schedule(PacketPtr _pkt, Tick t)
102{
103 pkt = _pkt;
104 Event::schedule(t);
105}
106
107TimingSimpleCPU::TimingSimpleCPU(Params *p)
108 : BaseSimpleCPU(p), icachePort(this, p->clock), dcachePort(this, p->clock)
109{
110 _status = Idle;
111
112 icachePort.snoopRangeSent = false;
113 dcachePort.snoopRangeSent = false;
114
115 ifetch_pkt = dcache_pkt = NULL;
116 drainEvent = NULL;
117 fetchEvent = NULL;
118 previousTick = 0;
119 changeState(SimObject::Running);
120}
121
122
123TimingSimpleCPU::~TimingSimpleCPU()
124{
125}
126
127void
128TimingSimpleCPU::serialize(ostream &os)
129{
130 SimObject::State so_state = SimObject::getState();
131 SERIALIZE_ENUM(so_state);
132 BaseSimpleCPU::serialize(os);
133}
134
135void
136TimingSimpleCPU::unserialize(Checkpoint *cp, const string §ion)
137{
138 SimObject::State so_state;
139 UNSERIALIZE_ENUM(so_state);
140 BaseSimpleCPU::unserialize(cp, section);
141}
142
143unsigned int
144TimingSimpleCPU::drain(Event *drain_event)
145{
146 // TimingSimpleCPU is ready to drain if it's not waiting for
147 // an access to complete.
148 if (status() == Idle || status() == Running || status() == SwitchedOut) {
149 changeState(SimObject::Drained);
150 return 0;
151 } else {
152 changeState(SimObject::Draining);
153 drainEvent = drain_event;
154 return 1;
155 }
156}
157
158void
159TimingSimpleCPU::resume()
160{
161 DPRINTF(SimpleCPU, "Resume\n");
162 if (_status != SwitchedOut && _status != Idle) {
163 assert(system->getMemoryMode() == Enums::timing);
164
165 // Delete the old event if it existed.
166 if (fetchEvent) {
167 if (fetchEvent->scheduled())
168 fetchEvent->deschedule();
169
170 delete fetchEvent;
171 }
172
173 fetchEvent = new FetchEvent(this, nextCycle());
174 }
175
176 changeState(SimObject::Running);
177}
178
179void
180TimingSimpleCPU::switchOut()
181{
182 assert(status() == Running || status() == Idle);
183 _status = SwitchedOut;
184 numCycles += tickToCycles(curTick - previousTick);
185
186 // If we've been scheduled to resume but are then told to switch out,
187 // we'll need to cancel it.
188 if (fetchEvent && fetchEvent->scheduled())
189 fetchEvent->deschedule();
190}
191
192
193void
194TimingSimpleCPU::takeOverFrom(BaseCPU *oldCPU)
195{
196 BaseCPU::takeOverFrom(oldCPU, &icachePort, &dcachePort);
197
198 // if any of this CPU's ThreadContexts are active, mark the CPU as
199 // running and schedule its tick event.
200 for (int i = 0; i < threadContexts.size(); ++i) {
201 ThreadContext *tc = threadContexts[i];
202 if (tc->status() == ThreadContext::Active && _status != Running) {
203 _status = Running;
204 break;
205 }
206 }
207
208 if (_status != Running) {
209 _status = Idle;
210 }
211 assert(threadContexts.size() == 1);
212 cpuId = tc->readCpuId();
213 previousTick = curTick;
214}
215
216
217void
218TimingSimpleCPU::activateContext(int thread_num, int delay)
219{
220 DPRINTF(SimpleCPU, "ActivateContext %d (%d cycles)\n", thread_num, delay);
221
222 assert(thread_num == 0);
223 assert(thread);
224
225 assert(_status == Idle);
226
227 notIdleFraction++;
228 _status = Running;
229
230 // kick things off by initiating the fetch of the next instruction
231 fetchEvent = new FetchEvent(this, nextCycle(curTick + ticks(delay)));
232}
233
234
235void
236TimingSimpleCPU::suspendContext(int thread_num)
237{
238 DPRINTF(SimpleCPU, "SuspendContext %d\n", thread_num);
239
240 assert(thread_num == 0);
241 assert(thread);
242
243 assert(_status == Running);
244
245 // just change status to Idle... if status != Running,
246 // completeInst() will not initiate fetch of next instruction.
247
248 notIdleFraction--;
249 _status = Idle;
250}
251
252
253template <class T>
254Fault
255TimingSimpleCPU::read(Addr addr, T &data, unsigned flags)
256{
257 Request *req =
258 new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
259 cpuId, /* thread ID */ 0);
260
261 if (traceData) {
262 traceData->setAddr(req->getVaddr());
263 }
264
265 // translate to physical address
266 Fault fault = thread->translateDataReadReq(req);
267
268 // Now do the access.
269 if (fault == NoFault) {
270 PacketPtr pkt =
271 new Packet(req,
272 (req->isLocked() ?
273 MemCmd::LoadLockedReq : MemCmd::ReadReq),
274 Packet::Broadcast);
275 pkt->dataDynamic<T>(new T);
276
277 if (req->isMmapedIpr()) {
278 Tick delay;
279 delay = TheISA::handleIprRead(thread->getTC(), pkt);
280 new IprEvent(pkt, this, nextCycle(curTick + delay));
281 _status = DcacheWaitResponse;
282 dcache_pkt = NULL;
283 } else if (!dcachePort.sendTiming(pkt)) {
284 _status = DcacheRetry;
285 dcache_pkt = pkt;
286 } else {
287 _status = DcacheWaitResponse;
288 // memory system takes ownership of packet
289 dcache_pkt = NULL;
290 }
291
292 // This will need a new way to tell if it has a dcache attached.
293 if (req->isUncacheable())
294 recordEvent("Uncached Read");
295 } else {
296 delete req;
297 }
298
| 1/*
2 * Copyright (c) 2002-2005 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 */
30
31#include "arch/locked_mem.hh"
32#include "arch/mmaped_ipr.hh"
33#include "arch/utility.hh"
34#include "base/bigint.hh"
35#include "cpu/exetrace.hh"
36#include "cpu/simple/timing.hh"
37#include "mem/packet.hh"
38#include "mem/packet_access.hh"
39#include "params/TimingSimpleCPU.hh"
40#include "sim/system.hh"
41
42using namespace std;
43using namespace TheISA;
44
45Port *
46TimingSimpleCPU::getPort(const std::string &if_name, int idx)
47{
48 if (if_name == "dcache_port")
49 return &dcachePort;
50 else if (if_name == "icache_port")
51 return &icachePort;
52 else
53 panic("No Such Port\n");
54}
55
56void
57TimingSimpleCPU::init()
58{
59 BaseCPU::init();
60 cpuId = tc->readCpuId();
61#if FULL_SYSTEM
62 for (int i = 0; i < threadContexts.size(); ++i) {
63 ThreadContext *tc = threadContexts[i];
64
65 // initialize CPU, including PC
66 TheISA::initCPU(tc, cpuId);
67 }
68#endif
69}
70
71Tick
72TimingSimpleCPU::CpuPort::recvAtomic(PacketPtr pkt)
73{
74 panic("TimingSimpleCPU doesn't expect recvAtomic callback!");
75 return curTick;
76}
77
78void
79TimingSimpleCPU::CpuPort::recvFunctional(PacketPtr pkt)
80{
81 //No internal storage to update, jusst return
82 return;
83}
84
85void
86TimingSimpleCPU::CpuPort::recvStatusChange(Status status)
87{
88 if (status == RangeChange) {
89 if (!snoopRangeSent) {
90 snoopRangeSent = true;
91 sendStatusChange(Port::RangeChange);
92 }
93 return;
94 }
95
96 panic("TimingSimpleCPU doesn't expect recvStatusChange callback!");
97}
98
99
100void
101TimingSimpleCPU::CpuPort::TickEvent::schedule(PacketPtr _pkt, Tick t)
102{
103 pkt = _pkt;
104 Event::schedule(t);
105}
106
107TimingSimpleCPU::TimingSimpleCPU(Params *p)
108 : BaseSimpleCPU(p), icachePort(this, p->clock), dcachePort(this, p->clock)
109{
110 _status = Idle;
111
112 icachePort.snoopRangeSent = false;
113 dcachePort.snoopRangeSent = false;
114
115 ifetch_pkt = dcache_pkt = NULL;
116 drainEvent = NULL;
117 fetchEvent = NULL;
118 previousTick = 0;
119 changeState(SimObject::Running);
120}
121
122
123TimingSimpleCPU::~TimingSimpleCPU()
124{
125}
126
127void
128TimingSimpleCPU::serialize(ostream &os)
129{
130 SimObject::State so_state = SimObject::getState();
131 SERIALIZE_ENUM(so_state);
132 BaseSimpleCPU::serialize(os);
133}
134
135void
136TimingSimpleCPU::unserialize(Checkpoint *cp, const string §ion)
137{
138 SimObject::State so_state;
139 UNSERIALIZE_ENUM(so_state);
140 BaseSimpleCPU::unserialize(cp, section);
141}
142
143unsigned int
144TimingSimpleCPU::drain(Event *drain_event)
145{
146 // TimingSimpleCPU is ready to drain if it's not waiting for
147 // an access to complete.
148 if (status() == Idle || status() == Running || status() == SwitchedOut) {
149 changeState(SimObject::Drained);
150 return 0;
151 } else {
152 changeState(SimObject::Draining);
153 drainEvent = drain_event;
154 return 1;
155 }
156}
157
158void
159TimingSimpleCPU::resume()
160{
161 DPRINTF(SimpleCPU, "Resume\n");
162 if (_status != SwitchedOut && _status != Idle) {
163 assert(system->getMemoryMode() == Enums::timing);
164
165 // Delete the old event if it existed.
166 if (fetchEvent) {
167 if (fetchEvent->scheduled())
168 fetchEvent->deschedule();
169
170 delete fetchEvent;
171 }
172
173 fetchEvent = new FetchEvent(this, nextCycle());
174 }
175
176 changeState(SimObject::Running);
177}
178
179void
180TimingSimpleCPU::switchOut()
181{
182 assert(status() == Running || status() == Idle);
183 _status = SwitchedOut;
184 numCycles += tickToCycles(curTick - previousTick);
185
186 // If we've been scheduled to resume but are then told to switch out,
187 // we'll need to cancel it.
188 if (fetchEvent && fetchEvent->scheduled())
189 fetchEvent->deschedule();
190}
191
192
193void
194TimingSimpleCPU::takeOverFrom(BaseCPU *oldCPU)
195{
196 BaseCPU::takeOverFrom(oldCPU, &icachePort, &dcachePort);
197
198 // if any of this CPU's ThreadContexts are active, mark the CPU as
199 // running and schedule its tick event.
200 for (int i = 0; i < threadContexts.size(); ++i) {
201 ThreadContext *tc = threadContexts[i];
202 if (tc->status() == ThreadContext::Active && _status != Running) {
203 _status = Running;
204 break;
205 }
206 }
207
208 if (_status != Running) {
209 _status = Idle;
210 }
211 assert(threadContexts.size() == 1);
212 cpuId = tc->readCpuId();
213 previousTick = curTick;
214}
215
216
217void
218TimingSimpleCPU::activateContext(int thread_num, int delay)
219{
220 DPRINTF(SimpleCPU, "ActivateContext %d (%d cycles)\n", thread_num, delay);
221
222 assert(thread_num == 0);
223 assert(thread);
224
225 assert(_status == Idle);
226
227 notIdleFraction++;
228 _status = Running;
229
230 // kick things off by initiating the fetch of the next instruction
231 fetchEvent = new FetchEvent(this, nextCycle(curTick + ticks(delay)));
232}
233
234
235void
236TimingSimpleCPU::suspendContext(int thread_num)
237{
238 DPRINTF(SimpleCPU, "SuspendContext %d\n", thread_num);
239
240 assert(thread_num == 0);
241 assert(thread);
242
243 assert(_status == Running);
244
245 // just change status to Idle... if status != Running,
246 // completeInst() will not initiate fetch of next instruction.
247
248 notIdleFraction--;
249 _status = Idle;
250}
251
252
253template <class T>
254Fault
255TimingSimpleCPU::read(Addr addr, T &data, unsigned flags)
256{
257 Request *req =
258 new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
259 cpuId, /* thread ID */ 0);
260
261 if (traceData) {
262 traceData->setAddr(req->getVaddr());
263 }
264
265 // translate to physical address
266 Fault fault = thread->translateDataReadReq(req);
267
268 // Now do the access.
269 if (fault == NoFault) {
270 PacketPtr pkt =
271 new Packet(req,
272 (req->isLocked() ?
273 MemCmd::LoadLockedReq : MemCmd::ReadReq),
274 Packet::Broadcast);
275 pkt->dataDynamic<T>(new T);
276
277 if (req->isMmapedIpr()) {
278 Tick delay;
279 delay = TheISA::handleIprRead(thread->getTC(), pkt);
280 new IprEvent(pkt, this, nextCycle(curTick + delay));
281 _status = DcacheWaitResponse;
282 dcache_pkt = NULL;
283 } else if (!dcachePort.sendTiming(pkt)) {
284 _status = DcacheRetry;
285 dcache_pkt = pkt;
286 } else {
287 _status = DcacheWaitResponse;
288 // memory system takes ownership of packet
289 dcache_pkt = NULL;
290 }
291
292 // This will need a new way to tell if it has a dcache attached.
293 if (req->isUncacheable())
294 recordEvent("Uncached Read");
295 } else {
296 delete req;
297 }
298
|
| 299 if (traceData) {
300 traceData->setData(data);
301 }
|
299 return fault;
300}
301
302Fault
303TimingSimpleCPU::translateDataReadAddr(Addr vaddr, Addr &paddr,
304 int size, unsigned flags)
305{
306 Request *req =
307 new Request(0, vaddr, size, flags, thread->readPC(), cpuId, 0);
308
309 if (traceData) {
310 traceData->setAddr(vaddr);
311 }
312
313 Fault fault = thread->translateDataWriteReq(req);
314
315 if (fault == NoFault)
316 paddr = req->getPaddr();
317
318 delete req;
319 return fault;
320}
321
322#ifndef DOXYGEN_SHOULD_SKIP_THIS
323
324template
325Fault
326TimingSimpleCPU::read(Addr addr, Twin64_t &data, unsigned flags);
327
328template
329Fault
330TimingSimpleCPU::read(Addr addr, Twin32_t &data, unsigned flags);
331
332template
333Fault
334TimingSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
335
336template
337Fault
338TimingSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags);
339
340template
341Fault
342TimingSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags);
343
344template
345Fault
346TimingSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags);
347
348#endif //DOXYGEN_SHOULD_SKIP_THIS
349
350template<>
351Fault
352TimingSimpleCPU::read(Addr addr, double &data, unsigned flags)
353{
354 return read(addr, *(uint64_t*)&data, flags);
355}
356
357template<>
358Fault
359TimingSimpleCPU::read(Addr addr, float &data, unsigned flags)
360{
361 return read(addr, *(uint32_t*)&data, flags);
362}
363
364
365template<>
366Fault
367TimingSimpleCPU::read(Addr addr, int32_t &data, unsigned flags)
368{
369 return read(addr, (uint32_t&)data, flags);
370}
371
372
373template <class T>
374Fault
375TimingSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
376{
377 Request *req =
378 new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
379 cpuId, /* thread ID */ 0);
380
381 if (traceData) {
382 traceData->setAddr(req->getVaddr());
383 }
384
385 // translate to physical address
386 Fault fault = thread->translateDataWriteReq(req);
387
388 // Now do the access.
389 if (fault == NoFault) {
390 MemCmd cmd = MemCmd::WriteReq; // default
391 bool do_access = true; // flag to suppress cache access
392
393 if (req->isLocked()) {
394 cmd = MemCmd::StoreCondReq;
395 do_access = TheISA::handleLockedWrite(thread, req);
396 } else if (req->isSwap()) {
397 cmd = MemCmd::SwapReq;
398 if (req->isCondSwap()) {
399 assert(res);
400 req->setExtraData(*res);
401 }
402 }
403
404 // Note: need to allocate dcache_pkt even if do_access is
405 // false, as it's used unconditionally to call completeAcc().
406 assert(dcache_pkt == NULL);
407 dcache_pkt = new Packet(req, cmd, Packet::Broadcast);
408 dcache_pkt->allocate();
409 dcache_pkt->set(data);
410
411 if (do_access) {
412 if (req->isMmapedIpr()) {
413 Tick delay;
414 dcache_pkt->set(htog(data));
415 delay = TheISA::handleIprWrite(thread->getTC(), dcache_pkt);
416 new IprEvent(dcache_pkt, this, nextCycle(curTick + delay));
417 _status = DcacheWaitResponse;
418 dcache_pkt = NULL;
419 } else if (!dcachePort.sendTiming(dcache_pkt)) {
420 _status = DcacheRetry;
421 } else {
422 _status = DcacheWaitResponse;
423 // memory system takes ownership of packet
424 dcache_pkt = NULL;
425 }
426 }
427 // This will need a new way to tell if it's hooked up to a cache or not.
428 if (req->isUncacheable())
429 recordEvent("Uncached Write");
430 } else {
431 delete req;
432 }
433
| 302 return fault;
303}
304
305Fault
306TimingSimpleCPU::translateDataReadAddr(Addr vaddr, Addr &paddr,
307 int size, unsigned flags)
308{
309 Request *req =
310 new Request(0, vaddr, size, flags, thread->readPC(), cpuId, 0);
311
312 if (traceData) {
313 traceData->setAddr(vaddr);
314 }
315
316 Fault fault = thread->translateDataWriteReq(req);
317
318 if (fault == NoFault)
319 paddr = req->getPaddr();
320
321 delete req;
322 return fault;
323}
324
325#ifndef DOXYGEN_SHOULD_SKIP_THIS
326
327template
328Fault
329TimingSimpleCPU::read(Addr addr, Twin64_t &data, unsigned flags);
330
331template
332Fault
333TimingSimpleCPU::read(Addr addr, Twin32_t &data, unsigned flags);
334
335template
336Fault
337TimingSimpleCPU::read(Addr addr, uint64_t &data, unsigned flags);
338
339template
340Fault
341TimingSimpleCPU::read(Addr addr, uint32_t &data, unsigned flags);
342
343template
344Fault
345TimingSimpleCPU::read(Addr addr, uint16_t &data, unsigned flags);
346
347template
348Fault
349TimingSimpleCPU::read(Addr addr, uint8_t &data, unsigned flags);
350
351#endif //DOXYGEN_SHOULD_SKIP_THIS
352
353template<>
354Fault
355TimingSimpleCPU::read(Addr addr, double &data, unsigned flags)
356{
357 return read(addr, *(uint64_t*)&data, flags);
358}
359
360template<>
361Fault
362TimingSimpleCPU::read(Addr addr, float &data, unsigned flags)
363{
364 return read(addr, *(uint32_t*)&data, flags);
365}
366
367
368template<>
369Fault
370TimingSimpleCPU::read(Addr addr, int32_t &data, unsigned flags)
371{
372 return read(addr, (uint32_t&)data, flags);
373}
374
375
376template <class T>
377Fault
378TimingSimpleCPU::write(T data, Addr addr, unsigned flags, uint64_t *res)
379{
380 Request *req =
381 new Request(/* asid */ 0, addr, sizeof(T), flags, thread->readPC(),
382 cpuId, /* thread ID */ 0);
383
384 if (traceData) {
385 traceData->setAddr(req->getVaddr());
386 }
387
388 // translate to physical address
389 Fault fault = thread->translateDataWriteReq(req);
390
391 // Now do the access.
392 if (fault == NoFault) {
393 MemCmd cmd = MemCmd::WriteReq; // default
394 bool do_access = true; // flag to suppress cache access
395
396 if (req->isLocked()) {
397 cmd = MemCmd::StoreCondReq;
398 do_access = TheISA::handleLockedWrite(thread, req);
399 } else if (req->isSwap()) {
400 cmd = MemCmd::SwapReq;
401 if (req->isCondSwap()) {
402 assert(res);
403 req->setExtraData(*res);
404 }
405 }
406
407 // Note: need to allocate dcache_pkt even if do_access is
408 // false, as it's used unconditionally to call completeAcc().
409 assert(dcache_pkt == NULL);
410 dcache_pkt = new Packet(req, cmd, Packet::Broadcast);
411 dcache_pkt->allocate();
412 dcache_pkt->set(data);
413
414 if (do_access) {
415 if (req->isMmapedIpr()) {
416 Tick delay;
417 dcache_pkt->set(htog(data));
418 delay = TheISA::handleIprWrite(thread->getTC(), dcache_pkt);
419 new IprEvent(dcache_pkt, this, nextCycle(curTick + delay));
420 _status = DcacheWaitResponse;
421 dcache_pkt = NULL;
422 } else if (!dcachePort.sendTiming(dcache_pkt)) {
423 _status = DcacheRetry;
424 } else {
425 _status = DcacheWaitResponse;
426 // memory system takes ownership of packet
427 dcache_pkt = NULL;
428 }
429 }
430 // This will need a new way to tell if it's hooked up to a cache or not.
431 if (req->isUncacheable())
432 recordEvent("Uncached Write");
433 } else {
434 delete req;
435 }
436
|
| 437 if (traceData) {
438 traceData->setData(data);
439 }
|
434
435 // If the write needs to have a fault on the access, consider calling
436 // changeStatus() and changing it to "bad addr write" or something.
437 return fault;
438}
439
440Fault
441TimingSimpleCPU::translateDataWriteAddr(Addr vaddr, Addr &paddr,
442 int size, unsigned flags)
443{
444 Request *req =
445 new Request(0, vaddr, size, flags, thread->readPC(), cpuId, 0);
446
447 if (traceData) {
448 traceData->setAddr(vaddr);
449 }
450
451 Fault fault = thread->translateDataWriteReq(req);
452
453 if (fault == NoFault)
454 paddr = req->getPaddr();
455
456 delete req;
457 return fault;
458}
459
460
461#ifndef DOXYGEN_SHOULD_SKIP_THIS
462template
463Fault
464TimingSimpleCPU::write(Twin32_t data, Addr addr,
465 unsigned flags, uint64_t *res);
466
467template
468Fault
469TimingSimpleCPU::write(Twin64_t data, Addr addr,
470 unsigned flags, uint64_t *res);
471
472template
473Fault
474TimingSimpleCPU::write(uint64_t data, Addr addr,
475 unsigned flags, uint64_t *res);
476
477template
478Fault
479TimingSimpleCPU::write(uint32_t data, Addr addr,
480 unsigned flags, uint64_t *res);
481
482template
483Fault
484TimingSimpleCPU::write(uint16_t data, Addr addr,
485 unsigned flags, uint64_t *res);
486
487template
488Fault
489TimingSimpleCPU::write(uint8_t data, Addr addr,
490 unsigned flags, uint64_t *res);
491
492#endif //DOXYGEN_SHOULD_SKIP_THIS
493
494template<>
495Fault
496TimingSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res)
497{
498 return write(*(uint64_t*)&data, addr, flags, res);
499}
500
501template<>
502Fault
503TimingSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res)
504{
505 return write(*(uint32_t*)&data, addr, flags, res);
506}
507
508
509template<>
510Fault
511TimingSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
512{
513 return write((uint32_t)data, addr, flags, res);
514}
515
516
517void
518TimingSimpleCPU::fetch()
519{
520 DPRINTF(SimpleCPU, "Fetch\n");
521
522 if (!curStaticInst || !curStaticInst->isDelayedCommit())
523 checkForInterrupts();
524
525 checkPcEventQueue();
526
527 Request *ifetch_req = new Request();
528 ifetch_req->setThreadContext(cpuId, /* thread ID */ 0);
529 Fault fault = setupFetchRequest(ifetch_req);
530
531 ifetch_pkt = new Packet(ifetch_req, MemCmd::ReadReq, Packet::Broadcast);
532 ifetch_pkt->dataStatic(&inst);
533
534 if (fault == NoFault) {
535 if (!icachePort.sendTiming(ifetch_pkt)) {
536 // Need to wait for retry
537 _status = IcacheRetry;
538 } else {
539 // Need to wait for cache to respond
540 _status = IcacheWaitResponse;
541 // ownership of packet transferred to memory system
542 ifetch_pkt = NULL;
543 }
544 } else {
545 delete ifetch_req;
546 delete ifetch_pkt;
547 // fetch fault: advance directly to next instruction (fault handler)
548 advanceInst(fault);
549 }
550
551 numCycles += tickToCycles(curTick - previousTick);
552 previousTick = curTick;
553}
554
555
556void
557TimingSimpleCPU::advanceInst(Fault fault)
558{
559 advancePC(fault);
560
561 if (_status == Running) {
562 // kick off fetch of next instruction... callback from icache
563 // response will cause that instruction to be executed,
564 // keeping the CPU running.
565 fetch();
566 }
567}
568
569
570void
571TimingSimpleCPU::completeIfetch(PacketPtr pkt)
572{
573 DPRINTF(SimpleCPU, "Complete ICache Fetch\n");
574
575 // received a response from the icache: execute the received
576 // instruction
577 assert(!pkt->isError());
578 assert(_status == IcacheWaitResponse);
579
580 _status = Running;
581
582 numCycles += tickToCycles(curTick - previousTick);
583 previousTick = curTick;
584
585 if (getState() == SimObject::Draining) {
586 delete pkt->req;
587 delete pkt;
588
589 completeDrain();
590 return;
591 }
592
593 preExecute();
594 if (curStaticInst->isMemRef() && !curStaticInst->isDataPrefetch()) {
595 // load or store: just send to dcache
596 Fault fault = curStaticInst->initiateAcc(this, traceData);
597 if (_status != Running) {
598 // instruction will complete in dcache response callback
599 assert(_status == DcacheWaitResponse || _status == DcacheRetry);
600 assert(fault == NoFault);
601 } else {
602 if (fault == NoFault) {
603 // Note that ARM can have NULL packets if the instruction gets
604 // squashed due to predication
605 // early fail on store conditional: complete now
606 assert(dcache_pkt != NULL || THE_ISA == ARM_ISA);
607
608 fault = curStaticInst->completeAcc(dcache_pkt, this,
609 traceData);
610 if (dcache_pkt != NULL)
611 {
612 delete dcache_pkt->req;
613 delete dcache_pkt;
614 dcache_pkt = NULL;
615 }
616
617 // keep an instruction count
618 if (fault == NoFault)
619 countInst();
620 } else if (traceData) {
621 // If there was a fault, we shouldn't trace this instruction.
622 delete traceData;
623 traceData = NULL;
624 }
625
626 postExecute();
627 // @todo remove me after debugging with legion done
628 if (curStaticInst && (!curStaticInst->isMicroop() ||
629 curStaticInst->isFirstMicroop()))
630 instCnt++;
631 advanceInst(fault);
632 }
633 } else {
634 // non-memory instruction: execute completely now
635 Fault fault = curStaticInst->execute(this, traceData);
636
637 // keep an instruction count
638 if (fault == NoFault)
639 countInst();
640 else if (traceData) {
641 // If there was a fault, we shouldn't trace this instruction.
642 delete traceData;
643 traceData = NULL;
644 }
645
646 postExecute();
647 // @todo remove me after debugging with legion done
648 if (curStaticInst && (!curStaticInst->isMicroop() ||
649 curStaticInst->isFirstMicroop()))
650 instCnt++;
651 advanceInst(fault);
652 }
653
654 delete pkt->req;
655 delete pkt;
656}
657
658void
659TimingSimpleCPU::IcachePort::ITickEvent::process()
660{
661 cpu->completeIfetch(pkt);
662}
663
664bool
665TimingSimpleCPU::IcachePort::recvTiming(PacketPtr pkt)
666{
667 if (pkt->isResponse() && !pkt->wasNacked()) {
668 // delay processing of returned data until next CPU clock edge
669 Tick next_tick = cpu->nextCycle(curTick);
670
671 if (next_tick == curTick)
672 cpu->completeIfetch(pkt);
673 else
674 tickEvent.schedule(pkt, next_tick);
675
676 return true;
677 }
678 else if (pkt->wasNacked()) {
679 assert(cpu->_status == IcacheWaitResponse);
680 pkt->reinitNacked();
681 if (!sendTiming(pkt)) {
682 cpu->_status = IcacheRetry;
683 cpu->ifetch_pkt = pkt;
684 }
685 }
686 //Snooping a Coherence Request, do nothing
687 return true;
688}
689
690void
691TimingSimpleCPU::IcachePort::recvRetry()
692{
693 // we shouldn't get a retry unless we have a packet that we're
694 // waiting to transmit
695 assert(cpu->ifetch_pkt != NULL);
696 assert(cpu->_status == IcacheRetry);
697 PacketPtr tmp = cpu->ifetch_pkt;
698 if (sendTiming(tmp)) {
699 cpu->_status = IcacheWaitResponse;
700 cpu->ifetch_pkt = NULL;
701 }
702}
703
704void
705TimingSimpleCPU::completeDataAccess(PacketPtr pkt)
706{
707 // received a response from the dcache: complete the load or store
708 // instruction
709 assert(!pkt->isError());
710 assert(_status == DcacheWaitResponse);
711 _status = Running;
712
713 numCycles += tickToCycles(curTick - previousTick);
714 previousTick = curTick;
715
716 Fault fault = curStaticInst->completeAcc(pkt, this, traceData);
717
718 // keep an instruction count
719 if (fault == NoFault)
720 countInst();
721 else if (traceData) {
722 // If there was a fault, we shouldn't trace this instruction.
723 delete traceData;
724 traceData = NULL;
725 }
726
727 if (pkt->isRead() && pkt->isLocked()) {
728 TheISA::handleLockedRead(thread, pkt->req);
729 }
730
731 delete pkt->req;
732 delete pkt;
733
734 postExecute();
735
736 if (getState() == SimObject::Draining) {
737 advancePC(fault);
738 completeDrain();
739
740 return;
741 }
742
743 advanceInst(fault);
744}
745
746
747void
748TimingSimpleCPU::completeDrain()
749{
750 DPRINTF(Config, "Done draining\n");
751 changeState(SimObject::Drained);
752 drainEvent->process();
753}
754
755void
756TimingSimpleCPU::DcachePort::setPeer(Port *port)
757{
758 Port::setPeer(port);
759
760#if FULL_SYSTEM
761 // Update the ThreadContext's memory ports (Functional/Virtual
762 // Ports)
763 cpu->tcBase()->connectMemPorts();
764#endif
765}
766
767bool
768TimingSimpleCPU::DcachePort::recvTiming(PacketPtr pkt)
769{
770 if (pkt->isResponse() && !pkt->wasNacked()) {
771 // delay processing of returned data until next CPU clock edge
772 Tick next_tick = cpu->nextCycle(curTick);
773
774 if (next_tick == curTick)
775 cpu->completeDataAccess(pkt);
776 else
777 tickEvent.schedule(pkt, next_tick);
778
779 return true;
780 }
781 else if (pkt->wasNacked()) {
782 assert(cpu->_status == DcacheWaitResponse);
783 pkt->reinitNacked();
784 if (!sendTiming(pkt)) {
785 cpu->_status = DcacheRetry;
786 cpu->dcache_pkt = pkt;
787 }
788 }
789 //Snooping a Coherence Request, do nothing
790 return true;
791}
792
793void
794TimingSimpleCPU::DcachePort::DTickEvent::process()
795{
796 cpu->completeDataAccess(pkt);
797}
798
799void
800TimingSimpleCPU::DcachePort::recvRetry()
801{
802 // we shouldn't get a retry unless we have a packet that we're
803 // waiting to transmit
804 assert(cpu->dcache_pkt != NULL);
805 assert(cpu->_status == DcacheRetry);
806 PacketPtr tmp = cpu->dcache_pkt;
807 if (sendTiming(tmp)) {
808 cpu->_status = DcacheWaitResponse;
809 // memory system takes ownership of packet
810 cpu->dcache_pkt = NULL;
811 }
812}
813
814TimingSimpleCPU::IprEvent::IprEvent(Packet *_pkt, TimingSimpleCPU *_cpu, Tick t)
815 : Event(&mainEventQueue), pkt(_pkt), cpu(_cpu)
816{
817 schedule(t);
818}
819
820void
821TimingSimpleCPU::IprEvent::process()
822{
823 cpu->completeDataAccess(pkt);
824}
825
826const char *
827TimingSimpleCPU::IprEvent::description() const
828{
829 return "Timing Simple CPU Delay IPR event";
830}
831
832
833void
834TimingSimpleCPU::printAddr(Addr a)
835{
836 dcachePort.printAddr(a);
837}
838
839
840////////////////////////////////////////////////////////////////////////
841//
842// TimingSimpleCPU Simulation Object
843//
844TimingSimpleCPU *
845TimingSimpleCPUParams::create()
846{
847 TimingSimpleCPU::Params *params = new TimingSimpleCPU::Params();
848 params->name = name;
849 params->numberOfThreads = 1;
850 params->max_insts_any_thread = max_insts_any_thread;
851 params->max_insts_all_threads = max_insts_all_threads;
852 params->max_loads_any_thread = max_loads_any_thread;
853 params->max_loads_all_threads = max_loads_all_threads;
854 params->progress_interval = progress_interval;
855 params->deferRegistration = defer_registration;
856 params->clock = clock;
857 params->phase = phase;
858 params->functionTrace = function_trace;
859 params->functionTraceStart = function_trace_start;
860 params->system = system;
861 params->cpu_id = cpu_id;
862 params->tracer = tracer;
863
864 params->itb = itb;
865 params->dtb = dtb;
866#if FULL_SYSTEM
867 params->profile = profile;
868 params->do_quiesce = do_quiesce;
869 params->do_checkpoint_insts = do_checkpoint_insts;
870 params->do_statistics_insts = do_statistics_insts;
871#else
872 if (workload.size() != 1)
873 panic("only one workload allowed");
874 params->process = workload[0];
875#endif
876
877 TimingSimpleCPU *cpu = new TimingSimpleCPU(params);
878 return cpu;
879}
| 440
441 // If the write needs to have a fault on the access, consider calling
442 // changeStatus() and changing it to "bad addr write" or something.
443 return fault;
444}
445
446Fault
447TimingSimpleCPU::translateDataWriteAddr(Addr vaddr, Addr &paddr,
448 int size, unsigned flags)
449{
450 Request *req =
451 new Request(0, vaddr, size, flags, thread->readPC(), cpuId, 0);
452
453 if (traceData) {
454 traceData->setAddr(vaddr);
455 }
456
457 Fault fault = thread->translateDataWriteReq(req);
458
459 if (fault == NoFault)
460 paddr = req->getPaddr();
461
462 delete req;
463 return fault;
464}
465
466
467#ifndef DOXYGEN_SHOULD_SKIP_THIS
468template
469Fault
470TimingSimpleCPU::write(Twin32_t data, Addr addr,
471 unsigned flags, uint64_t *res);
472
473template
474Fault
475TimingSimpleCPU::write(Twin64_t data, Addr addr,
476 unsigned flags, uint64_t *res);
477
478template
479Fault
480TimingSimpleCPU::write(uint64_t data, Addr addr,
481 unsigned flags, uint64_t *res);
482
483template
484Fault
485TimingSimpleCPU::write(uint32_t data, Addr addr,
486 unsigned flags, uint64_t *res);
487
488template
489Fault
490TimingSimpleCPU::write(uint16_t data, Addr addr,
491 unsigned flags, uint64_t *res);
492
493template
494Fault
495TimingSimpleCPU::write(uint8_t data, Addr addr,
496 unsigned flags, uint64_t *res);
497
498#endif //DOXYGEN_SHOULD_SKIP_THIS
499
500template<>
501Fault
502TimingSimpleCPU::write(double data, Addr addr, unsigned flags, uint64_t *res)
503{
504 return write(*(uint64_t*)&data, addr, flags, res);
505}
506
507template<>
508Fault
509TimingSimpleCPU::write(float data, Addr addr, unsigned flags, uint64_t *res)
510{
511 return write(*(uint32_t*)&data, addr, flags, res);
512}
513
514
515template<>
516Fault
517TimingSimpleCPU::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
518{
519 return write((uint32_t)data, addr, flags, res);
520}
521
522
523void
524TimingSimpleCPU::fetch()
525{
526 DPRINTF(SimpleCPU, "Fetch\n");
527
528 if (!curStaticInst || !curStaticInst->isDelayedCommit())
529 checkForInterrupts();
530
531 checkPcEventQueue();
532
533 Request *ifetch_req = new Request();
534 ifetch_req->setThreadContext(cpuId, /* thread ID */ 0);
535 Fault fault = setupFetchRequest(ifetch_req);
536
537 ifetch_pkt = new Packet(ifetch_req, MemCmd::ReadReq, Packet::Broadcast);
538 ifetch_pkt->dataStatic(&inst);
539
540 if (fault == NoFault) {
541 if (!icachePort.sendTiming(ifetch_pkt)) {
542 // Need to wait for retry
543 _status = IcacheRetry;
544 } else {
545 // Need to wait for cache to respond
546 _status = IcacheWaitResponse;
547 // ownership of packet transferred to memory system
548 ifetch_pkt = NULL;
549 }
550 } else {
551 delete ifetch_req;
552 delete ifetch_pkt;
553 // fetch fault: advance directly to next instruction (fault handler)
554 advanceInst(fault);
555 }
556
557 numCycles += tickToCycles(curTick - previousTick);
558 previousTick = curTick;
559}
560
561
562void
563TimingSimpleCPU::advanceInst(Fault fault)
564{
565 advancePC(fault);
566
567 if (_status == Running) {
568 // kick off fetch of next instruction... callback from icache
569 // response will cause that instruction to be executed,
570 // keeping the CPU running.
571 fetch();
572 }
573}
574
575
576void
577TimingSimpleCPU::completeIfetch(PacketPtr pkt)
578{
579 DPRINTF(SimpleCPU, "Complete ICache Fetch\n");
580
581 // received a response from the icache: execute the received
582 // instruction
583 assert(!pkt->isError());
584 assert(_status == IcacheWaitResponse);
585
586 _status = Running;
587
588 numCycles += tickToCycles(curTick - previousTick);
589 previousTick = curTick;
590
591 if (getState() == SimObject::Draining) {
592 delete pkt->req;
593 delete pkt;
594
595 completeDrain();
596 return;
597 }
598
599 preExecute();
600 if (curStaticInst->isMemRef() && !curStaticInst->isDataPrefetch()) {
601 // load or store: just send to dcache
602 Fault fault = curStaticInst->initiateAcc(this, traceData);
603 if (_status != Running) {
604 // instruction will complete in dcache response callback
605 assert(_status == DcacheWaitResponse || _status == DcacheRetry);
606 assert(fault == NoFault);
607 } else {
608 if (fault == NoFault) {
609 // Note that ARM can have NULL packets if the instruction gets
610 // squashed due to predication
611 // early fail on store conditional: complete now
612 assert(dcache_pkt != NULL || THE_ISA == ARM_ISA);
613
614 fault = curStaticInst->completeAcc(dcache_pkt, this,
615 traceData);
616 if (dcache_pkt != NULL)
617 {
618 delete dcache_pkt->req;
619 delete dcache_pkt;
620 dcache_pkt = NULL;
621 }
622
623 // keep an instruction count
624 if (fault == NoFault)
625 countInst();
626 } else if (traceData) {
627 // If there was a fault, we shouldn't trace this instruction.
628 delete traceData;
629 traceData = NULL;
630 }
631
632 postExecute();
633 // @todo remove me after debugging with legion done
634 if (curStaticInst && (!curStaticInst->isMicroop() ||
635 curStaticInst->isFirstMicroop()))
636 instCnt++;
637 advanceInst(fault);
638 }
639 } else {
640 // non-memory instruction: execute completely now
641 Fault fault = curStaticInst->execute(this, traceData);
642
643 // keep an instruction count
644 if (fault == NoFault)
645 countInst();
646 else if (traceData) {
647 // If there was a fault, we shouldn't trace this instruction.
648 delete traceData;
649 traceData = NULL;
650 }
651
652 postExecute();
653 // @todo remove me after debugging with legion done
654 if (curStaticInst && (!curStaticInst->isMicroop() ||
655 curStaticInst->isFirstMicroop()))
656 instCnt++;
657 advanceInst(fault);
658 }
659
660 delete pkt->req;
661 delete pkt;
662}
663
664void
665TimingSimpleCPU::IcachePort::ITickEvent::process()
666{
667 cpu->completeIfetch(pkt);
668}
669
670bool
671TimingSimpleCPU::IcachePort::recvTiming(PacketPtr pkt)
672{
673 if (pkt->isResponse() && !pkt->wasNacked()) {
674 // delay processing of returned data until next CPU clock edge
675 Tick next_tick = cpu->nextCycle(curTick);
676
677 if (next_tick == curTick)
678 cpu->completeIfetch(pkt);
679 else
680 tickEvent.schedule(pkt, next_tick);
681
682 return true;
683 }
684 else if (pkt->wasNacked()) {
685 assert(cpu->_status == IcacheWaitResponse);
686 pkt->reinitNacked();
687 if (!sendTiming(pkt)) {
688 cpu->_status = IcacheRetry;
689 cpu->ifetch_pkt = pkt;
690 }
691 }
692 //Snooping a Coherence Request, do nothing
693 return true;
694}
695
696void
697TimingSimpleCPU::IcachePort::recvRetry()
698{
699 // we shouldn't get a retry unless we have a packet that we're
700 // waiting to transmit
701 assert(cpu->ifetch_pkt != NULL);
702 assert(cpu->_status == IcacheRetry);
703 PacketPtr tmp = cpu->ifetch_pkt;
704 if (sendTiming(tmp)) {
705 cpu->_status = IcacheWaitResponse;
706 cpu->ifetch_pkt = NULL;
707 }
708}
709
710void
711TimingSimpleCPU::completeDataAccess(PacketPtr pkt)
712{
713 // received a response from the dcache: complete the load or store
714 // instruction
715 assert(!pkt->isError());
716 assert(_status == DcacheWaitResponse);
717 _status = Running;
718
719 numCycles += tickToCycles(curTick - previousTick);
720 previousTick = curTick;
721
722 Fault fault = curStaticInst->completeAcc(pkt, this, traceData);
723
724 // keep an instruction count
725 if (fault == NoFault)
726 countInst();
727 else if (traceData) {
728 // If there was a fault, we shouldn't trace this instruction.
729 delete traceData;
730 traceData = NULL;
731 }
732
733 if (pkt->isRead() && pkt->isLocked()) {
734 TheISA::handleLockedRead(thread, pkt->req);
735 }
736
737 delete pkt->req;
738 delete pkt;
739
740 postExecute();
741
742 if (getState() == SimObject::Draining) {
743 advancePC(fault);
744 completeDrain();
745
746 return;
747 }
748
749 advanceInst(fault);
750}
751
752
753void
754TimingSimpleCPU::completeDrain()
755{
756 DPRINTF(Config, "Done draining\n");
757 changeState(SimObject::Drained);
758 drainEvent->process();
759}
760
761void
762TimingSimpleCPU::DcachePort::setPeer(Port *port)
763{
764 Port::setPeer(port);
765
766#if FULL_SYSTEM
767 // Update the ThreadContext's memory ports (Functional/Virtual
768 // Ports)
769 cpu->tcBase()->connectMemPorts();
770#endif
771}
772
773bool
774TimingSimpleCPU::DcachePort::recvTiming(PacketPtr pkt)
775{
776 if (pkt->isResponse() && !pkt->wasNacked()) {
777 // delay processing of returned data until next CPU clock edge
778 Tick next_tick = cpu->nextCycle(curTick);
779
780 if (next_tick == curTick)
781 cpu->completeDataAccess(pkt);
782 else
783 tickEvent.schedule(pkt, next_tick);
784
785 return true;
786 }
787 else if (pkt->wasNacked()) {
788 assert(cpu->_status == DcacheWaitResponse);
789 pkt->reinitNacked();
790 if (!sendTiming(pkt)) {
791 cpu->_status = DcacheRetry;
792 cpu->dcache_pkt = pkt;
793 }
794 }
795 //Snooping a Coherence Request, do nothing
796 return true;
797}
798
799void
800TimingSimpleCPU::DcachePort::DTickEvent::process()
801{
802 cpu->completeDataAccess(pkt);
803}
804
805void
806TimingSimpleCPU::DcachePort::recvRetry()
807{
808 // we shouldn't get a retry unless we have a packet that we're
809 // waiting to transmit
810 assert(cpu->dcache_pkt != NULL);
811 assert(cpu->_status == DcacheRetry);
812 PacketPtr tmp = cpu->dcache_pkt;
813 if (sendTiming(tmp)) {
814 cpu->_status = DcacheWaitResponse;
815 // memory system takes ownership of packet
816 cpu->dcache_pkt = NULL;
817 }
818}
819
820TimingSimpleCPU::IprEvent::IprEvent(Packet *_pkt, TimingSimpleCPU *_cpu, Tick t)
821 : Event(&mainEventQueue), pkt(_pkt), cpu(_cpu)
822{
823 schedule(t);
824}
825
826void
827TimingSimpleCPU::IprEvent::process()
828{
829 cpu->completeDataAccess(pkt);
830}
831
832const char *
833TimingSimpleCPU::IprEvent::description() const
834{
835 return "Timing Simple CPU Delay IPR event";
836}
837
838
839void
840TimingSimpleCPU::printAddr(Addr a)
841{
842 dcachePort.printAddr(a);
843}
844
845
846////////////////////////////////////////////////////////////////////////
847//
848// TimingSimpleCPU Simulation Object
849//
850TimingSimpleCPU *
851TimingSimpleCPUParams::create()
852{
853 TimingSimpleCPU::Params *params = new TimingSimpleCPU::Params();
854 params->name = name;
855 params->numberOfThreads = 1;
856 params->max_insts_any_thread = max_insts_any_thread;
857 params->max_insts_all_threads = max_insts_all_threads;
858 params->max_loads_any_thread = max_loads_any_thread;
859 params->max_loads_all_threads = max_loads_all_threads;
860 params->progress_interval = progress_interval;
861 params->deferRegistration = defer_registration;
862 params->clock = clock;
863 params->phase = phase;
864 params->functionTrace = function_trace;
865 params->functionTraceStart = function_trace_start;
866 params->system = system;
867 params->cpu_id = cpu_id;
868 params->tracer = tracer;
869
870 params->itb = itb;
871 params->dtb = dtb;
872#if FULL_SYSTEM
873 params->profile = profile;
874 params->do_quiesce = do_quiesce;
875 params->do_checkpoint_insts = do_checkpoint_insts;
876 params->do_statistics_insts = do_statistics_insts;
877#else
878 if (workload.size() != 1)
879 panic("only one workload allowed");
880 params->process = workload[0];
881#endif
882
883 TimingSimpleCPU *cpu = new TimingSimpleCPU(params);
884 return cpu;
885}
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