base.hh revision 2632:1bb2f91485ea
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 29#ifndef __CPU_BASE_HH__ 30#define __CPU_BASE_HH__ 31 32#include <vector> 33 34#include "base/statistics.hh" 35#include "config/full_system.hh" 36#include "cpu/sampler/sampler.hh" 37#include "sim/eventq.hh" 38#include "sim/sim_object.hh" 39#include "arch/isa_traits.hh" 40 41class System; 42namespace Kernel { class Statistics; } 43class BranchPred; 44class ExecContext; 45 46class BaseCPU : public SimObject 47{ 48 protected: 49 // CPU's clock period in terms of the number of ticks of curTime. 50 Tick clock; 51 52 public: 53 inline Tick frequency() const { return Clock::Frequency / clock; } 54 inline Tick cycles(int numCycles) const { return clock * numCycles; } 55 inline Tick curCycle() const { return curTick / clock; } 56 57#if FULL_SYSTEM 58 protected: 59 uint64_t interrupts[TheISA::NumInterruptLevels]; 60 uint64_t intstatus; 61 62 public: 63 virtual void post_interrupt(int int_num, int index); 64 virtual void clear_interrupt(int int_num, int index); 65 virtual void clear_interrupts(); 66 bool checkInterrupts; 67 68 bool check_interrupt(int int_num) const { 69 if (int_num > TheISA::NumInterruptLevels) 70 panic("int_num out of bounds\n"); 71 72 return interrupts[int_num] != 0; 73 } 74 75 bool check_interrupts() const { return intstatus != 0; } 76 uint64_t intr_status() const { return intstatus; } 77 78 class ProfileEvent : public Event 79 { 80 private: 81 BaseCPU *cpu; 82 int interval; 83 84 public: 85 ProfileEvent(BaseCPU *cpu, int interval); 86 void process(); 87 }; 88 ProfileEvent *profileEvent; 89#endif 90 91 protected: 92 std::vector<ExecContext *> execContexts; 93 94 public: 95 96 /// Notify the CPU that the indicated context is now active. The 97 /// delay parameter indicates the number of ticks to wait before 98 /// executing (typically 0 or 1). 99 virtual void activateContext(int thread_num, int delay) {} 100 101 /// Notify the CPU that the indicated context is now suspended. 102 virtual void suspendContext(int thread_num) {} 103 104 /// Notify the CPU that the indicated context is now deallocated. 105 virtual void deallocateContext(int thread_num) {} 106 107 /// Notify the CPU that the indicated context is now halted. 108 virtual void haltContext(int thread_num) {} 109 110 public: 111 struct Params 112 { 113 std::string name; 114 int numberOfThreads; 115 bool deferRegistration; 116 Counter max_insts_any_thread; 117 Counter max_insts_all_threads; 118 Counter max_loads_any_thread; 119 Counter max_loads_all_threads; 120 Tick clock; 121 bool functionTrace; 122 Tick functionTraceStart; 123 System *system; 124#if FULL_SYSTEM 125 int cpu_id; 126 Tick profile; 127#endif 128 129 Params(); 130 }; 131 132 const Params *params; 133 134 BaseCPU(Params *params); 135 virtual ~BaseCPU(); 136 137 virtual void init(); 138 virtual void startup(); 139 virtual void regStats(); 140 141 virtual void activateWhenReady(int tid) {}; 142 143 void registerExecContexts(); 144 145 /// Prepare for another CPU to take over execution. When it is 146 /// is ready (drained pipe) it signals the sampler. 147 virtual void switchOut(Sampler *); 148 149 /// Take over execution from the given CPU. Used for warm-up and 150 /// sampling. 151 virtual void takeOverFrom(BaseCPU *); 152 153 /** 154 * Number of threads we're actually simulating (<= SMT_MAX_THREADS). 155 * This is a constant for the duration of the simulation. 156 */ 157 int number_of_threads; 158 159 /** 160 * Vector of per-thread instruction-based event queues. Used for 161 * scheduling events based on number of instructions committed by 162 * a particular thread. 163 */ 164 EventQueue **comInstEventQueue; 165 166 /** 167 * Vector of per-thread load-based event queues. Used for 168 * scheduling events based on number of loads committed by 169 *a particular thread. 170 */ 171 EventQueue **comLoadEventQueue; 172 173 System *system; 174 175#if FULL_SYSTEM 176 /** 177 * Serialize this object to the given output stream. 178 * @param os The stream to serialize to. 179 */ 180 virtual void serialize(std::ostream &os); 181 182 /** 183 * Reconstruct the state of this object from a checkpoint. 184 * @param cp The checkpoint use. 185 * @param section The section name of this object 186 */ 187 virtual void unserialize(Checkpoint *cp, const std::string §ion); 188 189#endif 190 191 /** 192 * Return pointer to CPU's branch predictor (NULL if none). 193 * @return Branch predictor pointer. 194 */ 195 virtual BranchPred *getBranchPred() { return NULL; }; 196 197 virtual Counter totalInstructions() const { return 0; } 198 199 // Function tracing 200 private: 201 bool functionTracingEnabled; 202 std::ostream *functionTraceStream; 203 Addr currentFunctionStart; 204 Addr currentFunctionEnd; 205 Tick functionEntryTick; 206 void enableFunctionTrace(); 207 void traceFunctionsInternal(Addr pc); 208 209 protected: 210 void traceFunctions(Addr pc) 211 { 212 if (functionTracingEnabled) 213 traceFunctionsInternal(pc); 214 } 215 216 private: 217 static std::vector<BaseCPU *> cpuList; //!< Static global cpu list 218 219 public: 220 static int numSimulatedCPUs() { return cpuList.size(); } 221 static Counter numSimulatedInstructions() 222 { 223 Counter total = 0; 224 225 int size = cpuList.size(); 226 for (int i = 0; i < size; ++i) 227 total += cpuList[i]->totalInstructions(); 228 229 return total; 230 } 231 232 public: 233 // Number of CPU cycles simulated 234 Stats::Scalar<> numCycles; 235 236#if FULL_SYSTEM 237 Kernel::Statistics *kernelStats; 238#endif 239}; 240 241#endif // __CPU_BASE_HH__ 242