base_dyn_inst_impl.hh revision 3801:5ea378e2bccd
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, 66 Addr inst_PC, Addr inst_NPC, 67 Addr pred_PC, Addr pred_NPC, 68 InstSeqNum seq_num, ImplCPU *cpu) 69 : staticInst(machInst), traceData(NULL), cpu(cpu) 70{ 71 seqNum = seq_num; 72 73 PC = inst_PC; 74 nextPC = inst_NPC; 75 nextNPC = nextPC + sizeof(TheISA::MachInst); 76 predPC = pred_PC; 77 predNPC = pred_NPC; 78 predTaken = false; 79 80 initVars(); 81} 82 83template <class Impl> 84BaseDynInst<Impl>::BaseDynInst(StaticInstPtr &_staticInst) 85 : staticInst(_staticInst), traceData(NULL) 86{ 87 seqNum = 0; 88 initVars(); 89} 90 91template <class Impl> 92void 93BaseDynInst<Impl>::initVars() 94{ 95 req = NULL; 96 memData = NULL; 97 effAddr = 0; 98 physEffAddr = 0; 99 100 readyRegs = 0; 101 102 instResult.integer = 0; 103 recordResult = true; 104 105 status.reset(); 106 107 eaCalcDone = false; 108 memOpDone = false; 109 110 lqIdx = -1; 111 sqIdx = -1; 112 113 // Eventually make this a parameter. 114 threadNumber = 0; 115 116 // Also make this a parameter, or perhaps get it from xc or cpu. 117 asid = 0; 118 119 // Initialize the fault to be NoFault. 120 fault = NoFault; 121 122 ++instcount; 123 124 if (instcount > 1500) { 125 cpu->dumpInsts(); 126#ifdef DEBUG 127 dumpSNList(); 128#endif 129 assert(instcount <= 1500); 130 } 131 132 DPRINTF(DynInst, "DynInst: [sn:%lli] Instruction created. Instcount=%i\n", 133 seqNum, instcount); 134 135#ifdef DEBUG 136 cpu->snList.insert(seqNum); 137#endif 138} 139 140template <class Impl> 141BaseDynInst<Impl>::~BaseDynInst() 142{ 143 if (req) { 144 delete req; 145 } 146 147 if (memData) { 148 delete [] memData; 149 } 150 151 if (traceData) { 152 delete traceData; 153 } 154 155 fault = NoFault; 156 157 --instcount; 158 159 DPRINTF(DynInst, "DynInst: [sn:%lli] Instruction destroyed. Instcount=%i\n", 160 seqNum, instcount); 161#ifdef DEBUG 162 cpu->snList.erase(seqNum); 163#endif 164} 165 166#ifdef DEBUG 167template <class Impl> 168void 169BaseDynInst<Impl>::dumpSNList() 170{ 171 std::set<InstSeqNum>::iterator sn_it = cpu->snList.begin(); 172 173 int count = 0; 174 while (sn_it != cpu->snList.end()) { 175 cprintf("%i: [sn:%lli] not destroyed\n", count, (*sn_it)); 176 count++; 177 sn_it++; 178 } 179} 180#endif 181 182template <class Impl> 183void 184BaseDynInst<Impl>::prefetch(Addr addr, unsigned flags) 185{ 186 // This is the "functional" implementation of prefetch. Not much 187 // happens here since prefetches don't affect the architectural 188 // state. 189/* 190 // Generate a MemReq so we can translate the effective address. 191 MemReqPtr req = new MemReq(addr, thread->getXCProxy(), 1, flags); 192 req->asid = asid; 193 194 // Prefetches never cause faults. 195 fault = NoFault; 196 197 // note this is a local, not BaseDynInst::fault 198 Fault trans_fault = cpu->translateDataReadReq(req); 199 200 if (trans_fault == NoFault && !(req->isUncacheable())) { 201 // It's a valid address to cacheable space. Record key MemReq 202 // parameters so we can generate another one just like it for 203 // the timing access without calling translate() again (which 204 // might mess up the TLB). 205 effAddr = req->vaddr; 206 physEffAddr = req->paddr; 207 memReqFlags = req->flags; 208 } else { 209 // Bogus address (invalid or uncacheable space). Mark it by 210 // setting the eff_addr to InvalidAddr. 211 effAddr = physEffAddr = MemReq::inval_addr; 212 } 213 214 if (traceData) { 215 traceData->setAddr(addr); 216 } 217*/ 218} 219 220template <class Impl> 221void 222BaseDynInst<Impl>::writeHint(Addr addr, int size, unsigned flags) 223{ 224 // Not currently supported. 225} 226 227/** 228 * @todo Need to find a way to get the cache block size here. 229 */ 230template <class Impl> 231Fault 232BaseDynInst<Impl>::copySrcTranslate(Addr src) 233{ 234 // Not currently supported. 235 return NoFault; 236} 237 238/** 239 * @todo Need to find a way to get the cache block size here. 240 */ 241template <class Impl> 242Fault 243BaseDynInst<Impl>::copy(Addr dest) 244{ 245 // Not currently supported. 246 return NoFault; 247} 248 249template <class Impl> 250void 251BaseDynInst<Impl>::dump() 252{ 253 cprintf("T%d : %#08d `", threadNumber, PC); 254 std::cout << staticInst->disassemble(PC); 255 cprintf("'\n"); 256} 257 258template <class Impl> 259void 260BaseDynInst<Impl>::dump(std::string &outstring) 261{ 262 std::ostringstream s; 263 s << "T" << threadNumber << " : 0x" << PC << " " 264 << staticInst->disassemble(PC); 265 266 outstring = s.str(); 267} 268 269template <class Impl> 270void 271BaseDynInst<Impl>::markSrcRegReady() 272{ 273 if (++readyRegs == numSrcRegs()) { 274 status.set(CanIssue); 275 } 276} 277 278template <class Impl> 279void 280BaseDynInst<Impl>::markSrcRegReady(RegIndex src_idx) 281{ 282 _readySrcRegIdx[src_idx] = true; 283 284 markSrcRegReady(); 285} 286 287template <class Impl> 288bool 289BaseDynInst<Impl>::eaSrcsReady() 290{ 291 // For now I am assuming that src registers 1..n-1 are the ones that the 292 // EA calc depends on. (i.e. src reg 0 is the source of the data to be 293 // stored) 294 295 for (int i = 1; i < numSrcRegs(); ++i) { 296 if (!_readySrcRegIdx[i]) 297 return false; 298 } 299 300 return true; 301} 302