base.hh revision 3521:0b0b3551def0
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 * Nathan Binkert 30 */ 31 32#ifndef __CPU_BASE_HH__ 33#define __CPU_BASE_HH__ 34 35#include <vector> 36 37#include "base/statistics.hh" 38#include "config/full_system.hh" 39#include "sim/eventq.hh" 40#include "mem/mem_object.hh" 41#include "arch/isa_traits.hh" 42 43#if FULL_SYSTEM 44#include "arch/interrupts.hh" 45#endif 46 47class BranchPred; 48class CheckerCPU; 49class ThreadContext; 50class System; 51class Port; 52 53class CPUProgressEvent : public Event 54{ 55 protected: 56 Tick interval; 57 Counter lastNumInst; 58 BaseCPU *cpu; 59 60 public: 61 CPUProgressEvent(EventQueue *q, Tick ival, BaseCPU *_cpu); 62 63 void process(); 64 65 virtual const char *description(); 66}; 67 68class BaseCPU : public MemObject 69{ 70 protected: 71 // CPU's clock period in terms of the number of ticks of curTime. 72 Tick clock; 73 74 public: 75// Tick currentTick; 76 inline Tick frequency() const { return Clock::Frequency / clock; } 77 inline Tick cycles(int numCycles) const { return clock * numCycles; } 78 inline Tick curCycle() const { return curTick / clock; } 79 80#if FULL_SYSTEM 81 protected: 82// uint64_t interrupts[TheISA::NumInterruptLevels]; 83// uint64_t intstatus; 84 TheISA::Interrupts interrupts; 85 86 public: 87 virtual void post_interrupt(int int_num, int index); 88 virtual void clear_interrupt(int int_num, int index); 89 virtual void clear_interrupts(); 90 bool checkInterrupts; 91 92 bool check_interrupts(ThreadContext * tc) const 93 { return interrupts.check_interrupts(tc); } 94 95 class ProfileEvent : public Event 96 { 97 private: 98 BaseCPU *cpu; 99 int interval; 100 101 public: 102 ProfileEvent(BaseCPU *cpu, int interval); 103 void process(); 104 }; 105 ProfileEvent *profileEvent; 106#endif 107 108 protected: 109 std::vector<ThreadContext *> threadContexts; 110 111 public: 112 113 /// Notify the CPU that the indicated context is now active. The 114 /// delay parameter indicates the number of ticks to wait before 115 /// executing (typically 0 or 1). 116 virtual void activateContext(int thread_num, int delay) {} 117 118 /// Notify the CPU that the indicated context is now suspended. 119 virtual void suspendContext(int thread_num) {} 120 121 /// Notify the CPU that the indicated context is now deallocated. 122 virtual void deallocateContext(int thread_num) {} 123 124 /// Notify the CPU that the indicated context is now halted. 125 virtual void haltContext(int thread_num) {} 126 127 public: 128 struct Params 129 { 130 std::string name; 131 int numberOfThreads; 132 bool deferRegistration; 133 Counter max_insts_any_thread; 134 Counter max_insts_all_threads; 135 Counter max_loads_any_thread; 136 Counter max_loads_all_threads; 137 Tick clock; 138 bool functionTrace; 139 Tick functionTraceStart; 140 System *system; 141 int cpu_id; 142#if FULL_SYSTEM 143 Tick profile; 144#endif 145 Tick progress_interval; 146 BaseCPU *checker; 147 148 Params(); 149 }; 150 151 const Params *params; 152 153 BaseCPU(Params *params); 154 virtual ~BaseCPU(); 155 156 virtual void init(); 157 virtual void startup(); 158 virtual void regStats(); 159 160 virtual void activateWhenReady(int tid) {}; 161 162 void registerThreadContexts(); 163 164 /// Prepare for another CPU to take over execution. When it is 165 /// is ready (drained pipe) it signals the sampler. 166 virtual void switchOut(); 167 168 /// Take over execution from the given CPU. Used for warm-up and 169 /// sampling. 170 virtual void takeOverFrom(BaseCPU *); 171 172 /** 173 * Number of threads we're actually simulating (<= SMT_MAX_THREADS). 174 * This is a constant for the duration of the simulation. 175 */ 176 int number_of_threads; 177 178 /** 179 * Vector of per-thread instruction-based event queues. Used for 180 * scheduling events based on number of instructions committed by 181 * a particular thread. 182 */ 183 EventQueue **comInstEventQueue; 184 185 /** 186 * Vector of per-thread load-based event queues. Used for 187 * scheduling events based on number of loads committed by 188 *a particular thread. 189 */ 190 EventQueue **comLoadEventQueue; 191 192 System *system; 193 194#if FULL_SYSTEM 195 /** 196 * Serialize this object to the given output stream. 197 * @param os The stream to serialize to. 198 */ 199 virtual void serialize(std::ostream &os); 200 201 /** 202 * Reconstruct the state of this object from a checkpoint. 203 * @param cp The checkpoint use. 204 * @param section The section name of this object 205 */ 206 virtual void unserialize(Checkpoint *cp, const std::string §ion); 207 208#endif 209 210 /** 211 * Return pointer to CPU's branch predictor (NULL if none). 212 * @return Branch predictor pointer. 213 */ 214 virtual BranchPred *getBranchPred() { return NULL; }; 215 216 virtual Counter totalInstructions() const { return 0; } 217 218 // Function tracing 219 private: 220 bool functionTracingEnabled; 221 std::ostream *functionTraceStream; 222 Addr currentFunctionStart; 223 Addr currentFunctionEnd; 224 Tick functionEntryTick; 225 void enableFunctionTrace(); 226 void traceFunctionsInternal(Addr pc); 227 228 protected: 229 void traceFunctions(Addr pc) 230 { 231 if (functionTracingEnabled) 232 traceFunctionsInternal(pc); 233 } 234 235 private: 236 static std::vector<BaseCPU *> cpuList; //!< Static global cpu list 237 238 public: 239 static int numSimulatedCPUs() { return cpuList.size(); } 240 static Counter numSimulatedInstructions() 241 { 242 Counter total = 0; 243 244 int size = cpuList.size(); 245 for (int i = 0; i < size; ++i) 246 total += cpuList[i]->totalInstructions(); 247 248 return total; 249 } 250 251 public: 252 // Number of CPU cycles simulated 253 Stats::Scalar<> numCycles; 254}; 255 256#endif // __CPU_BASE_HH__ 257