base.hh revision 3276
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 MemObject *mem; 80 81 protected: 82 Trace::InstRecord *traceData; 83 84 public: 85 void post_interrupt(int int_num, int index); 86 87 void zero_fill_64(Addr addr) { 88 static int warned = 0; 89 if (!warned) { 90 warn ("WH64 is not implemented"); 91 warned = 1; 92 } 93 }; 94 95 public: 96 struct Params : public BaseCPU::Params 97 { 98 MemObject *mem; 99#if FULL_SYSTEM 100 AlphaITB *itb; 101 AlphaDTB *dtb; 102#else 103 Process *process; 104#endif 105 }; 106 BaseSimpleCPU(Params *params); 107 virtual ~BaseSimpleCPU(); 108 109 public: 110 /** SimpleThread object, provides all the architectural state. */ 111 SimpleThread *thread; 112 113 /** ThreadContext object, provides an interface for external 114 * objects to modify this thread's state. 115 */ 116 ThreadContext *tc; 117 118#if FULL_SYSTEM 119 Addr dbg_vtophys(Addr addr); 120 121 bool interval_stats; 122#endif 123 124 // current instruction 125 MachInst inst; 126 127 // Static data storage 128 TheISA::IntReg dataReg; 129 130 StaticInstPtr curStaticInst; 131 StaticInstPtr curMacroStaticInst; 132 133 void checkForInterrupts(); 134 Fault setupFetchRequest(Request *req); 135 void preExecute(); 136 void postExecute(); 137 void advancePC(Fault fault); 138 139 virtual void deallocateContext(int thread_num); 140 virtual void haltContext(int thread_num); 141 142 // statistics 143 virtual void regStats(); 144 virtual void resetStats(); 145 146 // number of simulated instructions 147 Counter numInst; 148 Counter startNumInst; 149 Stats::Scalar<> numInsts; 150 151 virtual Counter totalInstructions() const 152 { 153 return numInst - startNumInst; 154 } 155 156 // number of simulated memory references 157 Stats::Scalar<> numMemRefs; 158 159 // number of simulated loads 160 Counter numLoad; 161 Counter startNumLoad; 162 163 // number of idle cycles 164 Stats::Average<> notIdleFraction; 165 Stats::Formula idleFraction; 166 167 // number of cycles stalled for I-cache responses 168 Stats::Scalar<> icacheStallCycles; 169 Counter lastIcacheStall; 170 171 // number of cycles stalled for I-cache retries 172 Stats::Scalar<> icacheRetryCycles; 173 Counter lastIcacheRetry; 174 175 // number of cycles stalled for D-cache responses 176 Stats::Scalar<> dcacheStallCycles; 177 Counter lastDcacheStall; 178 179 // number of cycles stalled for D-cache retries 180 Stats::Scalar<> dcacheRetryCycles; 181 Counter lastDcacheRetry; 182 183 virtual void serialize(std::ostream &os); 184 virtual void unserialize(Checkpoint *cp, const std::string §ion); 185 186 // These functions are only used in CPU models that split 187 // effective address computation from the actual memory access. 188 void setEA(Addr EA) { panic("BaseSimpleCPU::setEA() not implemented\n"); } 189 Addr getEA() { panic("BaseSimpleCPU::getEA() not implemented\n"); } 190 191 void prefetch(Addr addr, unsigned flags) 192 { 193 // need to do this... 194 } 195 196 void writeHint(Addr addr, int size, unsigned flags) 197 { 198 // need to do this... 199 } 200 201 Fault copySrcTranslate(Addr src); 202 203 Fault copy(Addr dest); 204 205 // The register accessor methods provide the index of the 206 // instruction's operand (e.g., 0 or 1), not the architectural 207 // register index, to simplify the implementation of register 208 // renaming. We find the architectural register index by indexing 209 // into the instruction's own operand index table. Note that a 210 // raw pointer to the StaticInst is provided instead of a 211 // ref-counted StaticInstPtr to redice overhead. This is fine as 212 // long as these methods don't copy the pointer into any long-term 213 // storage (which is pretty hard to imagine they would have reason 214 // to do). 215 216 uint64_t readIntReg(const StaticInst *si, int idx) 217 { 218 return thread->readIntReg(si->srcRegIdx(idx)); 219 } 220 221 FloatReg readFloatReg(const StaticInst *si, int idx, int width) 222 { 223 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 224 return thread->readFloatReg(reg_idx, width); 225 } 226 227 FloatReg readFloatReg(const StaticInst *si, int idx) 228 { 229 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 230 return thread->readFloatReg(reg_idx); 231 } 232 233 FloatRegBits readFloatRegBits(const StaticInst *si, int idx, int width) 234 { 235 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 236 return thread->readFloatRegBits(reg_idx, width); 237 } 238 239 FloatRegBits readFloatRegBits(const StaticInst *si, int idx) 240 { 241 int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag; 242 return thread->readFloatRegBits(reg_idx); 243 } 244 245 void setIntReg(const StaticInst *si, int idx, uint64_t val) 246 { 247 thread->setIntReg(si->destRegIdx(idx), val); 248 } 249 250 void setFloatReg(const StaticInst *si, int idx, FloatReg val, int width) 251 { 252 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 253 thread->setFloatReg(reg_idx, val, width); 254 } 255 256 void setFloatReg(const StaticInst *si, int idx, FloatReg val) 257 { 258 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 259 thread->setFloatReg(reg_idx, val); 260 } 261 262 void setFloatRegBits(const StaticInst *si, int idx, 263 FloatRegBits val, int width) 264 { 265 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 266 thread->setFloatRegBits(reg_idx, val, width); 267 } 268 269 void setFloatRegBits(const StaticInst *si, int idx, FloatRegBits val) 270 { 271 int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag; 272 thread->setFloatRegBits(reg_idx, val); 273 } 274 275 uint64_t readPC() { return thread->readPC(); } 276 uint64_t readNextPC() { return thread->readNextPC(); } 277 uint64_t readNextNPC() { return thread->readNextNPC(); } 278 279 void setPC(uint64_t val) { thread->setPC(val); } 280 void setNextPC(uint64_t val) { thread->setNextPC(val); } 281 void setNextNPC(uint64_t val) { thread->setNextNPC(val); } 282 283 MiscReg readMiscReg(int misc_reg) 284 { 285 return thread->readMiscReg(misc_reg); 286 } 287 288 MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault) 289 { 290 return thread->readMiscRegWithEffect(misc_reg, fault); 291 } 292 293 Fault setMiscReg(int misc_reg, const MiscReg &val) 294 { 295 return thread->setMiscReg(misc_reg, val); 296 } 297 298 Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val) 299 { 300 return thread->setMiscRegWithEffect(misc_reg, val); 301 } 302 303#if FULL_SYSTEM 304 Fault hwrei() { return thread->hwrei(); } 305 int readIntrFlag() { return thread->readIntrFlag(); } 306 void setIntrFlag(int val) { thread->setIntrFlag(val); } 307 bool inPalMode() { return thread->inPalMode(); } 308 void ev5_trap(Fault fault) { fault->invoke(tc); } 309 bool simPalCheck(int palFunc) { return thread->simPalCheck(palFunc); } 310#else 311 void syscall(int64_t callnum) { thread->syscall(callnum); } 312#endif 313 314 bool misspeculating() { return thread->misspeculating(); } 315 ThreadContext *tcBase() { return tc; } 316}; 317 318#endif // __CPU_SIMPLE_BASE_HH__ 319