2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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.
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.
28 * Authors: Steve Reinhardt
32 #ifndef __CPU_BASE_HH__
33 #define __CPU_BASE_HH__
37 #include "arch/isa_traits.hh"
38 #include "arch/microcode_rom.hh"
39 #include "base/statistics.hh"
40 #include "config/full_system.hh"
41 #include "sim/eventq.hh"
42 #include "sim/insttracer.hh"
43 #include "mem/mem_object.hh"
46 #include "arch/interrupts.hh"
61 class CPUProgressEvent : public Event
70 CPUProgressEvent(BaseCPU *_cpu, Tick ival = 0);
74 void interval(Tick ival) { _interval = ival; }
75 Tick interval() { return _interval; }
77 void repeatEvent(bool repeat) { _repeatEvent = repeat; }
79 virtual const char *description() const;
82 class BaseCPU : public MemObject
85 // CPU's clock period in terms of the number of ticks of curTime.
87 // @todo remove me after debugging with legion done
89 // every cpu has an id, put it in the base cpu
90 // Set at initialization, only time a cpuId might change is during a
91 // takeover (which should be done from within the BaseCPU anyway,
92 // therefore no setCpuId() method is provided
96 /** Reads this CPU's ID. */
97 int cpuId() { return _cpuId; }
100 inline Tick frequency() const { return Clock::Frequency / clock; }
101 inline Tick ticks(int numCycles) const { return clock * numCycles; }
102 inline Tick curCycle() const { return curTick / clock; }
103 inline Tick tickToCycles(Tick val) const { return val / clock; }
104 // @todo remove me after debugging with legion done
105 Tick instCount() { return instCnt; }
107 /** The next cycle the CPU should be scheduled, given a cache
108 * access or quiesce event returning on this cycle. This function
109 * may return curTick if the CPU should run on the current cycle.
113 /** The next cycle the CPU should be scheduled, given a cache
114 * access or quiesce event returning on the given Tick. This
115 * function may return curTick if the CPU should run on the
117 * @param begin_tick The tick that the event is completing on.
119 Tick nextCycle(Tick begin_tick);
121 TheISA::MicrocodeRom microcodeRom;
125 TheISA::Interrupts *interrupts;
129 getInterruptController()
134 virtual void wakeup() = 0;
137 postInterrupt(int int_num, int index)
139 interrupts->post(int_num, index);
144 clearInterrupt(int int_num, int index)
146 interrupts->clear(int_num, index);
152 interrupts->clearAll();
156 checkInterrupts(ThreadContext *tc) const
158 return interrupts->checkInterrupts(tc);
161 class ProfileEvent : public Event
168 ProfileEvent(BaseCPU *cpu, Tick interval);
171 ProfileEvent *profileEvent;
175 std::vector<ThreadContext *> threadContexts;
176 std::vector<TheISA::Predecoder *> predecoders;
178 Trace::InstTracer * tracer;
182 /// Provide access to the tracer pointer
183 Trace::InstTracer * getTracer() { return tracer; }
185 /// Notify the CPU that the indicated context is now active. The
186 /// delay parameter indicates the number of ticks to wait before
187 /// executing (typically 0 or 1).
188 virtual void activateContext(int thread_num, int delay) {}
190 /// Notify the CPU that the indicated context is now suspended.
191 virtual void suspendContext(int thread_num) {}
193 /// Notify the CPU that the indicated context is now deallocated.
194 virtual void deallocateContext(int thread_num) {}
196 /// Notify the CPU that the indicated context is now halted.
197 virtual void haltContext(int thread_num) {}
199 /// Given a Thread Context pointer return the thread num
200 int findContext(ThreadContext *tc);
202 /// Given a thread num get tho thread context for it
203 ThreadContext *getContext(int tn) { return threadContexts[tn]; }
206 typedef BaseCPUParams Params;
207 const Params *params() const
208 { return reinterpret_cast<const Params *>(_params); }
209 BaseCPU(Params *params);
213 virtual void startup();
214 virtual void regStats();
216 virtual void activateWhenReady(ThreadID tid) {};
218 void registerThreadContexts();
220 /// Prepare for another CPU to take over execution. When it is
221 /// is ready (drained pipe) it signals the sampler.
222 virtual void switchOut();
224 /// Take over execution from the given CPU. Used for warm-up and
226 virtual void takeOverFrom(BaseCPU *, Port *ic, Port *dc);
229 * Number of threads we're actually simulating (<= SMT_MAX_THREADS).
230 * This is a constant for the duration of the simulation.
234 TheISA::CoreSpecific coreParams; //ISA-Specific Params That Set Up State in Core
237 * Vector of per-thread instruction-based event queues. Used for
238 * scheduling events based on number of instructions committed by
239 * a particular thread.
241 EventQueue **comInstEventQueue;
244 * Vector of per-thread load-based event queues. Used for
245 * scheduling events based on number of loads committed by
246 *a particular thread.
248 EventQueue **comLoadEventQueue;
256 * Serialize this object to the given output stream.
257 * @param os The stream to serialize to.
259 virtual void serialize(std::ostream &os);
262 * Reconstruct the state of this object from a checkpoint.
263 * @param cp The checkpoint use.
264 * @param section The section name of this object
266 virtual void unserialize(Checkpoint *cp, const std::string §ion);
271 * Return pointer to CPU's branch predictor (NULL if none).
272 * @return Branch predictor pointer.
274 virtual BranchPred *getBranchPred() { return NULL; };
276 virtual Counter totalInstructions() const { return 0; }
280 bool functionTracingEnabled;
281 std::ostream *functionTraceStream;
282 Addr currentFunctionStart;
283 Addr currentFunctionEnd;
284 Tick functionEntryTick;
285 void enableFunctionTrace();
286 void traceFunctionsInternal(Addr pc);
289 void traceFunctions(Addr pc)
291 if (functionTracingEnabled)
292 traceFunctionsInternal(pc);
296 static std::vector<BaseCPU *> cpuList; //!< Static global cpu list
299 static int numSimulatedCPUs() { return cpuList.size(); }
300 static Counter numSimulatedInstructions()
304 int size = cpuList.size();
305 for (int i = 0; i < size; ++i)
306 total += cpuList[i]->totalInstructions();
312 // Number of CPU cycles simulated
313 Stats::Scalar numCycles;
316 #endif // __CPU_BASE_HH__