base_dyn_inst_impl.hh revision 3794
1/* 2 * Copyright (c) 2004-2006 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: Kevin Lim 29 */ 30 31#include <iostream> 32#include <set> 33#include <string> 34#include <sstream> 35 36#include "base/cprintf.hh" 37#include "base/trace.hh" 38 39#include "sim/faults.hh" 40#include "cpu/exetrace.hh" 41#include "mem/request.hh" 42 43#include "cpu/base_dyn_inst.hh" 44 45#define NOHASH 46#ifndef NOHASH 47 48#include "base/hashmap.hh" 49 50unsigned int MyHashFunc(const BaseDynInst *addr) 51{ 52 unsigned a = (unsigned)addr; 53 unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF; 54 55 return hash; 56} 57 58typedef m5::hash_map<const BaseDynInst *, const BaseDynInst *, MyHashFunc> 59my_hash_t; 60 61my_hash_t thishash; 62#endif 63 64template <class Impl> 65BaseDynInst<Impl>::BaseDynInst(TheISA::ExtMachInst machInst, Addr inst_PC, 66 Addr pred_PC, Addr pred_NPC, 67 InstSeqNum seq_num, ImplCPU *cpu) 68 : staticInst(machInst), traceData(NULL), cpu(cpu) 69{ 70 seqNum = seq_num; 71 72 PC = inst_PC; 73 nextPC = PC + sizeof(TheISA::MachInst); 74 nextNPC = nextPC + sizeof(TheISA::MachInst); 75 predPC = pred_PC; 76 predNPC = pred_NPC; 77 predTaken = false; 78 79 initVars(); 80} 81 82template <class Impl> 83BaseDynInst<Impl>::BaseDynInst(StaticInstPtr &_staticInst) 84 : staticInst(_staticInst), traceData(NULL) 85{ 86 seqNum = 0; 87 initVars(); 88} 89 90template <class Impl> 91void 92BaseDynInst<Impl>::initVars() 93{ 94 req = NULL; 95 memData = NULL; 96 effAddr = 0; 97 physEffAddr = 0; 98 99 readyRegs = 0; 100 101 instResult.integer = 0; 102 recordResult = true; 103 104 status.reset(); 105 106 eaCalcDone = false; 107 memOpDone = false; 108 109 lqIdx = -1; 110 sqIdx = -1; 111 112 // Eventually make this a parameter. 113 threadNumber = 0; 114 115 // Also make this a parameter, or perhaps get it from xc or cpu. 116 asid = 0; 117 118 // Initialize the fault to be NoFault. 119 fault = NoFault; 120 121 ++instcount; 122 123 if (instcount > 1500) { 124 cpu->dumpInsts(); 125#ifdef DEBUG 126 dumpSNList(); 127#endif 128 assert(instcount <= 1500); 129 } 130 131 DPRINTF(DynInst, "DynInst: [sn:%lli] Instruction created. Instcount=%i\n", 132 seqNum, instcount); 133 134#ifdef DEBUG 135 cpu->snList.insert(seqNum); 136#endif 137} 138 139template <class Impl> 140BaseDynInst<Impl>::~BaseDynInst() 141{ 142 if (req) { 143 delete req; 144 } 145 146 if (memData) { 147 delete [] memData; 148 } 149 150 if (traceData) { 151 delete traceData; 152 } 153 154 fault = NoFault; 155 156 --instcount; 157 158 DPRINTF(DynInst, "DynInst: [sn:%lli] Instruction destroyed. Instcount=%i\n", 159 seqNum, instcount); 160#ifdef DEBUG 161 cpu->snList.erase(seqNum); 162#endif 163} 164 165#ifdef DEBUG 166template <class Impl> 167void 168BaseDynInst<Impl>::dumpSNList() 169{ 170 std::set<InstSeqNum>::iterator sn_it = cpu->snList.begin(); 171 172 int count = 0; 173 while (sn_it != cpu->snList.end()) { 174 cprintf("%i: [sn:%lli] not destroyed\n", count, (*sn_it)); 175 count++; 176 sn_it++; 177 } 178} 179#endif 180 181template <class Impl> 182void 183BaseDynInst<Impl>::prefetch(Addr addr, unsigned flags) 184{ 185 // This is the "functional" implementation of prefetch. Not much 186 // happens here since prefetches don't affect the architectural 187 // state. 188/* 189 // Generate a MemReq so we can translate the effective address. 190 MemReqPtr req = new MemReq(addr, thread->getXCProxy(), 1, flags); 191 req->asid = asid; 192 193 // Prefetches never cause faults. 194 fault = NoFault; 195 196 // note this is a local, not BaseDynInst::fault 197 Fault trans_fault = cpu->translateDataReadReq(req); 198 199 if (trans_fault == NoFault && !(req->isUncacheable())) { 200 // It's a valid address to cacheable space. Record key MemReq 201 // parameters so we can generate another one just like it for 202 // the timing access without calling translate() again (which 203 // might mess up the TLB). 204 effAddr = req->vaddr; 205 physEffAddr = req->paddr; 206 memReqFlags = req->flags; 207 } else { 208 // Bogus address (invalid or uncacheable space). Mark it by 209 // setting the eff_addr to InvalidAddr. 210 effAddr = physEffAddr = MemReq::inval_addr; 211 } 212 213 if (traceData) { 214 traceData->setAddr(addr); 215 } 216*/ 217} 218 219template <class Impl> 220void 221BaseDynInst<Impl>::writeHint(Addr addr, int size, unsigned flags) 222{ 223 // Not currently supported. 224} 225 226/** 227 * @todo Need to find a way to get the cache block size here. 228 */ 229template <class Impl> 230Fault 231BaseDynInst<Impl>::copySrcTranslate(Addr src) 232{ 233 // Not currently supported. 234 return NoFault; 235} 236 237/** 238 * @todo Need to find a way to get the cache block size here. 239 */ 240template <class Impl> 241Fault 242BaseDynInst<Impl>::copy(Addr dest) 243{ 244 // Not currently supported. 245 return NoFault; 246} 247 248template <class Impl> 249void 250BaseDynInst<Impl>::dump() 251{ 252 cprintf("T%d : %#08d `", threadNumber, PC); 253 std::cout << staticInst->disassemble(PC); 254 cprintf("'\n"); 255} 256 257template <class Impl> 258void 259BaseDynInst<Impl>::dump(std::string &outstring) 260{ 261 std::ostringstream s; 262 s << "T" << threadNumber << " : 0x" << PC << " " 263 << staticInst->disassemble(PC); 264 265 outstring = s.str(); 266} 267 268template <class Impl> 269void 270BaseDynInst<Impl>::markSrcRegReady() 271{ 272 if (++readyRegs == numSrcRegs()) { 273 status.set(CanIssue); 274 } 275} 276 277template <class Impl> 278void 279BaseDynInst<Impl>::markSrcRegReady(RegIndex src_idx) 280{ 281 _readySrcRegIdx[src_idx] = true; 282 283 markSrcRegReady(); 284} 285 286template <class Impl> 287bool 288BaseDynInst<Impl>::eaSrcsReady() 289{ 290 // For now I am assuming that src registers 1..n-1 are the ones that the 291 // EA calc depends on. (i.e. src reg 0 is the source of the data to be 292 // stored) 293 294 for (int i = 1; i < numSrcRegs(); ++i) { 295 if (!_readySrcRegIdx[i]) 296 return false; 297 } 298 299 return true; 300} 301