simple_thread.cc revision 6316
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 "cpu/base.hh" 38#include "cpu/simple_thread.hh" 39#include "cpu/thread_context.hh" 40#include "params/BaseCPU.hh" 41 42#if FULL_SYSTEM 43#include "arch/kernel_stats.hh" 44#include "arch/stacktrace.hh" 45#include "base/callback.hh" 46#include "base/cprintf.hh" 47#include "base/output.hh" 48#include "base/trace.hh" 49#include "cpu/profile.hh" 50#include "cpu/quiesce_event.hh" 51#include "sim/serialize.hh" 52#include "sim/sim_exit.hh" 53#else 54#include "mem/translating_port.hh" 55#include "sim/process.hh" 56#include "sim/system.hh" 57#endif 58 59using namespace std; 60 61// constructor 62#if FULL_SYSTEM 63SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys, 64 TheISA::TLB *_itb, TheISA::TLB *_dtb, 65 bool use_kernel_stats) 66 : ThreadState(_cpu, _thread_num), cpu(_cpu), system(_sys), itb(_itb), 67 dtb(_dtb) 68 69{ 70 tc = new ProxyThreadContext<SimpleThread>(this); 71 72 quiesceEvent = new EndQuiesceEvent(tc); 73 74 clearArchRegs(); 75 76 if (cpu->params()->profile) { 77 profile = new FunctionProfile(system->kernelSymtab); 78 Callback *cb = 79 new MakeCallback<SimpleThread, 80 &SimpleThread::dumpFuncProfile>(this); 81 registerExitCallback(cb); 82 } 83 84 // let's fill with a dummy node for now so we don't get a segfault 85 // on the first cycle when there's no node available. 86 static ProfileNode dummyNode; 87 profileNode = &dummyNode; 88 profilePC = 3; 89 90 if (use_kernel_stats) 91 kernelStats = new TheISA::Kernel::Statistics(system); 92} 93#else 94SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, Process *_process, 95 TheISA::TLB *_itb, TheISA::TLB *_dtb, int _asid) 96 : ThreadState(_cpu, _thread_num, _process, _asid), 97 cpu(_cpu), itb(_itb), dtb(_dtb) 98{ 99 clearArchRegs(); 100 tc = new ProxyThreadContext<SimpleThread>(this); 101} 102 103#endif 104 105SimpleThread::SimpleThread() 106#if FULL_SYSTEM 107 : ThreadState(NULL, -1) 108#else 109 : ThreadState(NULL, -1, NULL, -1) 110#endif 111{ 112 tc = new ProxyThreadContext<SimpleThread>(this); 113 regs.clear(); 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 regs.serialize(cpu, os); 195 SERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs); 196 SERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs); 197 // thread_num and cpu_id are deterministic from the config 198} 199 200 201void 202SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 203{ 204 ThreadState::unserialize(cp, section); 205 regs.unserialize(cpu, cp, section); 206 UNSERIALIZE_ARRAY(floatRegs.i, TheISA::NumFloatRegs); 207 UNSERIALIZE_ARRAY(intRegs, TheISA::NumIntRegs); 208 // thread_num and cpu_id are deterministic from the config 209} 210 211#if FULL_SYSTEM 212void 213SimpleThread::dumpFuncProfile() 214{ 215 std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); 216 profile->dump(tc, *os); 217} 218#endif 219 220void 221SimpleThread::activate(int delay) 222{ 223 if (status() == ThreadContext::Active) 224 return; 225 226 lastActivate = curTick; 227 228// if (status() == ThreadContext::Unallocated) { 229// cpu->activateWhenReady(_threadId); 230// return; 231// } 232 233 _status = ThreadContext::Active; 234 235 // status() == Suspended 236 cpu->activateContext(_threadId, delay); 237} 238 239void 240SimpleThread::suspend() 241{ 242 if (status() == ThreadContext::Suspended) 243 return; 244 245 lastActivate = curTick; 246 lastSuspend = curTick; 247/* 248#if FULL_SYSTEM 249 // Don't change the status from active if there are pending interrupts 250 if (cpu->checkInterrupts()) { 251 assert(status() == ThreadContext::Active); 252 return; 253 } 254#endif 255*/ 256 _status = ThreadContext::Suspended; 257 cpu->suspendContext(_threadId); 258} 259 260 261void 262SimpleThread::halt() 263{ 264 if (status() == ThreadContext::Halted) 265 return; 266 267 _status = ThreadContext::Halted; 268 cpu->haltContext(_threadId); 269} 270 271 272void 273SimpleThread::regStats(const string &name) 274{ 275#if FULL_SYSTEM 276 if (kernelStats) 277 kernelStats->regStats(name + ".kern"); 278#endif 279} 280 281void 282SimpleThread::copyArchRegs(ThreadContext *src_tc) 283{ 284 TheISA::copyRegs(src_tc, tc); 285} 286 287