base.hh revision 3402:db60546818d0
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 * Dave Greene 30 * Nathan Binkert 31 */ 32 33#ifndef __CPU_SIMPLE_BASE_HH__ 34#define __CPU_SIMPLE_BASE_HH__ 35 36#include "base/statistics.hh" 37#include "config/full_system.hh" 38#include "cpu/base.hh" 39#include "cpu/simple_thread.hh" 40#include "cpu/pc_event.hh" 41#include "cpu/static_inst.hh" 42#include "mem/packet.hh" 43#include "mem/port.hh" 44#include "mem/request.hh" 45#include "sim/eventq.hh" 46 47// forward declarations 48#if FULL_SYSTEM 49class Processor; 50class AlphaITB; 51class AlphaDTB; 52class MemObject; 53 54class RemoteGDB; 55class GDBListener; 56 57#else 58 59class Process; 60 61#endif // FULL_SYSTEM 62 63class ThreadContext; 64class Checkpoint; 65 66namespace Trace { 67 class InstRecord; 68} 69 70 71class BaseSimpleCPU : public BaseCPU 72{ 73 protected: 74 typedef TheISA::MachInst MachInst; 75 typedef TheISA::MiscReg MiscReg; 76 typedef TheISA::FloatReg FloatReg; 77 typedef TheISA::FloatRegBits FloatRegBits; 78 79 protected: 80 Trace::InstRecord *traceData; 81 82 public: 83 void post_interrupt(int int_num, int index); 84 85 void zero_fill_64(Addr addr) { 86 static int warned = 0; 87 if (!warned) { 88 warn ("WH64 is not implemented"); 89 warned = 1; 90 } 91 }; 92 93 public: 94 struct Params : public BaseCPU::Params 95 { 96#if FULL_SYSTEM 97 AlphaITB *itb; 98 AlphaDTB *dtb; 99#else 100 Process *process; 101#endif 102 }; 103 BaseSimpleCPU(Params *params); 104 virtual ~BaseSimpleCPU(); 105 106 public: 107 /** SimpleThread object, provides all the architectural state. */ 108 SimpleThread *thread; 109 110 /** ThreadContext object, provides an interface for external 111 * objects to modify this thread's state. 112 */ 113 ThreadContext *tc; 114 115#if FULL_SYSTEM 116 Addr dbg_vtophys(Addr addr); 117 118 bool interval_stats; 119#endif 120 121 // current instruction 122 MachInst inst; 123 124 // Static data storage 125 TheISA::IntReg dataReg; 126 127 StaticInstPtr curStaticInst; 128 StaticInstPtr curMacroStaticInst; 129 130 void checkForInterrupts(); 131 Fault setupFetchRequest(Request *req); 132 void preExecute(); 133 void postExecute(); 134 void advancePC(Fault fault); 135 136 virtual void deallocateContext(int thread_num); 137 virtual void haltContext(int thread_num); 138 139 // statistics 140 virtual void regStats(); 141 virtual void resetStats(); 142 143 // number of simulated instructions 144 Counter numInst; 145 Counter startNumInst; 146 Stats::Scalar<> numInsts; 147 148 virtual Counter totalInstructions() const 149 { 150 return numInst - startNumInst; 151 } 152 153 // number of simulated memory references 154 Stats::Scalar<> numMemRefs; 155 156 // number of simulated loads 157 Counter numLoad; 158 Counter startNumLoad; 159 160 // number of idle cycles 161 Stats::Average<> notIdleFraction; 162 Stats::Formula idleFraction; 163 164 // number of cycles stalled for I-cache responses 165 Stats::Scalar<> icacheStallCycles; 166 Counter lastIcacheStall; 167 168 // number of cycles stalled for I-cache retries 169 Stats::Scalar<> icacheRetryCycles; 170 Counter lastIcacheRetry; 171 172 // number of cycles stalled for D-cache responses 173 Stats::Scalar<> dcacheStallCycles; 174 Counter lastDcacheStall; 175 176 // number of cycles stalled for D-cache retries 177 Stats::Scalar<> dcacheRetryCycles; 178 Counter lastDcacheRetry; 179 180 virtual void serialize(std::ostream &os); 181 virtual void unserialize(Checkpoint *cp, const std::string §ion); 182 183 // These functions are only used in CPU models that split 184 // effective address computation from the actual memory access. 185 void setEA(Addr EA) { panic("BaseSimpleCPU::setEA() not implemented\n"); } 186 Addr getEA() { panic("BaseSimpleCPU::getEA() not implemented\n"); } 187 188 void prefetch(Addr addr, unsigned flags) 189 { 190 // need to do this... 191 } 192 193 void writeHint(Addr addr, int size, unsigned flags) 194 { 195 // need to do this... 196 } 197 198 Fault copySrcTranslate(Addr src); 199 200 Fault copy(Addr dest); 201 202 // The register accessor methods provide the index of the 203 // instruction's operand (e.g., 0 or 1), not the architectural 204 // register index, to simplify the implementation of register 205 // renaming. We find the architectural register index by indexing 206 // into the instruction's own operand index table. Note that a 207 // raw pointer to the StaticInst is provided instead of a 208 // ref-counted StaticInstPtr to redice overhead. This is fine as 209 // long as these methods don't copy the pointer into any long-term 210 // storage (which is pretty hard to imagine they would have reason 211 // to do). 212 213 uint64_t readIntReg(const StaticInst *si, int idx) 214 { 215 return thread->readIntReg(si->srcRegIdx(idx)); 216 } 217 218 FloatReg readFloatReg(const StaticInst *si, int idx, int width) 219 { 220 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 221 return thread->readFloatReg(reg_idx, width); 222 } 223 224 FloatReg readFloatReg(const StaticInst *si, int idx) 225 { 226 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 227 return thread->readFloatReg(reg_idx); 228 } 229 230 FloatRegBits readFloatRegBits(const StaticInst *si, int idx, int width) 231 { 232 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 233 return thread->readFloatRegBits(reg_idx, width); 234 } 235 236 FloatRegBits readFloatRegBits(const StaticInst *si, int idx) 237 { 238 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 239 return thread->readFloatRegBits(reg_idx); 240 } 241 242 void setIntReg(const StaticInst *si, int idx, uint64_t val) 243 { 244 thread->setIntReg(si->destRegIdx(idx), val); 245 } 246 247 void setFloatReg(const StaticInst *si, int idx, FloatReg val, int width) 248 { 249 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 250 thread->setFloatReg(reg_idx, val, width); 251 } 252 253 void setFloatReg(const StaticInst *si, int idx, FloatReg val) 254 { 255 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 256 thread->setFloatReg(reg_idx, val); 257 } 258 259 void setFloatRegBits(const StaticInst *si, int idx, 260 FloatRegBits val, int width) 261 { 262 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 263 thread->setFloatRegBits(reg_idx, val, width); 264 } 265 266 void setFloatRegBits(const StaticInst *si, int idx, FloatRegBits val) 267 { 268 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 269 thread->setFloatRegBits(reg_idx, val); 270 } 271 272 uint64_t readPC() { return thread->readPC(); } 273 uint64_t readNextPC() { return thread->readNextPC(); } 274 uint64_t readNextNPC() { return thread->readNextNPC(); } 275 276 void setPC(uint64_t val) { thread->setPC(val); } 277 void setNextPC(uint64_t val) { thread->setNextPC(val); } 278 void setNextNPC(uint64_t val) { thread->setNextNPC(val); } 279 280 MiscReg readMiscReg(int misc_reg) 281 { 282 return thread->readMiscReg(misc_reg); 283 } 284 285 MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault) 286 { 287 return thread->readMiscRegWithEffect(misc_reg, fault); 288 } 289 290 Fault setMiscReg(int misc_reg, const MiscReg &val) 291 { 292 return thread->setMiscReg(misc_reg, val); 293 } 294 295 Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val) 296 { 297 return thread->setMiscRegWithEffect(misc_reg, val); 298 } 299 300#if FULL_SYSTEM 301 Fault hwrei() { return thread->hwrei(); } 302 int readIntrFlag() { return thread->readIntrFlag(); } 303 void setIntrFlag(int val) { thread->setIntrFlag(val); } 304 bool inPalMode() { return thread->inPalMode(); } 305 void ev5_trap(Fault fault) { fault->invoke(tc); } 306 bool simPalCheck(int palFunc) { return thread->simPalCheck(palFunc); } 307#else 308 void syscall(int64_t callnum) { thread->syscall(callnum); } 309#endif 310 311 bool misspeculating() { return thread->misspeculating(); } 312 ThreadContext *tcBase() { return tc; } 313}; 314 315#endif // __CPU_SIMPLE_BASE_HH__ 316