simple_thread.cc revision 6658
1/* 2 * Copyright (c) 2001-2006 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: Steve Reinhardt 29 * Nathan Binkert 30 * Lisa Hsu 31 * Kevin Lim 32 */ 33 34#include <string> 35 36#include "arch/isa_traits.hh" 37#include "config/the_isa.hh" 38#include "cpu/base.hh" 39#include "cpu/simple_thread.hh" 40#include "cpu/thread_context.hh" 41#include "params/BaseCPU.hh" 42 43#if FULL_SYSTEM 44#include "arch/kernel_stats.hh" 45#include "arch/stacktrace.hh" 46#include "base/callback.hh" 47#include "base/cprintf.hh" 48#include "base/output.hh" 49#include "base/trace.hh" 50#include "cpu/profile.hh" 51#include "cpu/quiesce_event.hh" 52#include "sim/serialize.hh" 53#include "sim/sim_exit.hh" 54#else 55#include "mem/translating_port.hh" 56#include "sim/process.hh" 57#include "sim/system.hh" 58#endif 59 60using namespace std; 61 62// constructor 63#if FULL_SYSTEM 64SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys, 65 TheISA::TLB *_itb, TheISA::TLB *_dtb, 66 bool use_kernel_stats) 67 : ThreadState(_cpu, _thread_num), 68 cpu(_cpu), system(_sys), itb(_itb), dtb(_dtb) 69 70{ 71 tc = new ProxyThreadContext<SimpleThread>(this); 72 73 quiesceEvent = new EndQuiesceEvent(tc); 74 75 clearArchRegs(); 76 77 if (cpu->params()->profile) { 78 profile = new FunctionProfile(system->kernelSymtab); 79 Callback *cb = 80 new MakeCallback<SimpleThread, 81 &SimpleThread::dumpFuncProfile>(this); 82 registerExitCallback(cb); 83 } 84 85 // let's fill with a dummy node for now so we don't get a segfault 86 // on the first cycle when there's no node available. 87 static ProfileNode dummyNode; 88 profileNode = &dummyNode; 89 profilePC = 3; 90 91 if (use_kernel_stats) 92 kernelStats = new TheISA::Kernel::Statistics(system); 93} 94#else 95SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, Process *_process, 96 TheISA::TLB *_itb, TheISA::TLB *_dtb) 97 : ThreadState(_cpu, _thread_num, _process), 98 cpu(_cpu), itb(_itb), dtb(_dtb) 99{ 100 clearArchRegs(); 101 tc = new ProxyThreadContext<SimpleThread>(this); 102} 103 104#endif 105 106SimpleThread::SimpleThread() 107#if FULL_SYSTEM 108 : ThreadState(NULL, -1) 109#else 110 : ThreadState(NULL, -1, NULL) 111#endif 112{ 113 tc = new ProxyThreadContext<SimpleThread>(this); 114} 115 116SimpleThread::~SimpleThread() 117{ 118#if FULL_SYSTEM 119 delete physPort; 120 delete virtPort; 121#endif 122 delete tc; 123} 124 125void 126SimpleThread::takeOverFrom(ThreadContext *oldContext) 127{ 128 // some things should already be set up 129#if FULL_SYSTEM 130 assert(system == oldContext->getSystemPtr()); 131#else 132 assert(process == oldContext->getProcessPtr()); 133#endif 134 135 copyState(oldContext); 136#if FULL_SYSTEM 137 EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent(); 138 if (quiesce) { 139 // Point the quiesce event's TC at this TC so that it wakes up 140 // the proper CPU. 141 quiesce->tc = tc; 142 } 143 if (quiesceEvent) { 144 quiesceEvent->tc = tc; 145 } 146 147 TheISA::Kernel::Statistics *stats = oldContext->getKernelStats(); 148 if (stats) { 149 kernelStats = stats; 150 } 151#endif 152 153 storeCondFailures = 0; 154 155 oldContext->setStatus(ThreadContext::Halted); 156} 157 158void 159SimpleThread::copyTC(ThreadContext *context) 160{ 161 copyState(context); 162 163#if FULL_SYSTEM 164 EndQuiesceEvent *quiesce = context->getQuiesceEvent(); 165 if (quiesce) { 166 quiesceEvent = quiesce; 167 } 168 TheISA::Kernel::Statistics *stats = context->getKernelStats(); 169 if (stats) { 170 kernelStats = stats; 171 } 172#endif 173} 174 175void 176SimpleThread::copyState(ThreadContext *oldContext) 177{ 178 // copy over functional state 179 _status = oldContext->status(); 180 copyArchRegs(oldContext); 181#if !FULL_SYSTEM 182 funcExeInst = oldContext->readFuncExeInst(); 183#endif 184 inst = oldContext->getInst(); 185 186 _threadId = oldContext->threadId(); 187 _contextId = oldContext->contextId(); 188} 189 190void 191SimpleThread::serialize(ostream &os) 192{ 193 ThreadState::serialize(os); 194 SERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs); 195 SERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs); 196 SERIALIZE_SCALAR(microPC); 197 SERIALIZE_SCALAR(nextMicroPC); 198 SERIALIZE_SCALAR(PC); 199 SERIALIZE_SCALAR(nextPC); 200 SERIALIZE_SCALAR(nextNPC); 201 // thread_num and cpu_id are deterministic from the config 202} 203 204 205void 206SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 207{ 208 ThreadState::unserialize(cp, section); 209 UNSERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs); 210 UNSERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs); 211 UNSERIALIZE_SCALAR(microPC); 212 UNSERIALIZE_SCALAR(nextMicroPC); 213 UNSERIALIZE_SCALAR(PC); 214 UNSERIALIZE_SCALAR(nextPC); 215 UNSERIALIZE_SCALAR(nextNPC); 216 // thread_num and cpu_id are deterministic from the config 217} 218 219#if FULL_SYSTEM 220void 221SimpleThread::dumpFuncProfile() 222{ 223 std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); 224 profile->dump(tc, *os); 225} 226#endif 227 228void 229SimpleThread::activate(int delay) 230{ 231 if (status() == ThreadContext::Active) 232 return; 233 234 lastActivate = curTick; 235 236// if (status() == ThreadContext::Unallocated) { 237// cpu->activateWhenReady(_threadId); 238// return; 239// } 240 241 _status = ThreadContext::Active; 242 243 // status() == Suspended 244 cpu->activateContext(_threadId, delay); 245} 246 247void 248SimpleThread::suspend() 249{ 250 if (status() == ThreadContext::Suspended) 251 return; 252 253 lastActivate = curTick; 254 lastSuspend = curTick; 255/* 256#if FULL_SYSTEM 257 // Don't change the status from active if there are pending interrupts 258 if (cpu->checkInterrupts()) { 259 assert(status() == ThreadContext::Active); 260 return; 261 } 262#endif 263*/ 264 _status = ThreadContext::Suspended; 265 cpu->suspendContext(_threadId); 266} 267 268 269void 270SimpleThread::halt() 271{ 272 if (status() == ThreadContext::Halted) 273 return; 274 275 _status = ThreadContext::Halted; 276 cpu->haltContext(_threadId); 277} 278 279 280void 281SimpleThread::regStats(const string &name) 282{ 283#if FULL_SYSTEM 284 if (kernelStats) 285 kernelStats->regStats(name + ".kern"); 286#endif 287} 288 289void 290SimpleThread::copyArchRegs(ThreadContext *src_tc) 291{ 292 TheISA::copyRegs(src_tc, tc); 293} 294 295