simple_thread.cc revision 4400
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 41#if FULL_SYSTEM 42#include "arch/kernel_stats.hh" 43#include "base/callback.hh" 44#include "base/cprintf.hh" 45#include "base/output.hh" 46#include "base/trace.hh" 47#include "cpu/profile.hh" 48#include "cpu/quiesce_event.hh" 49#include "sim/serialize.hh" 50#include "sim/sim_exit.hh" 51#include "arch/stacktrace.hh" 52#else 53#include "sim/process.hh" 54#include "sim/system.hh" 55#include "mem/translating_port.hh" 56#endif 57 58using namespace std; 59 60// constructor 61#if FULL_SYSTEM 62SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, System *_sys, 63 TheISA::ITB *_itb, TheISA::DTB *_dtb, 64 bool use_kernel_stats) 65 : ThreadState(_cpu, -1, _thread_num), cpu(_cpu), system(_sys), itb(_itb), 66 dtb(_dtb) 67 68{ 69 tc = new ProxyThreadContext<SimpleThread>(this); 70 71 quiesceEvent = new EndQuiesceEvent(tc); 72 73 regs.clear(); 74 75 if (cpu->params->profile) { 76 profile = new FunctionProfile(system->kernelSymtab); 77 Callback *cb = 78 new MakeCallback<SimpleThread, 79 &SimpleThread::dumpFuncProfile>(this); 80 registerExitCallback(cb); 81 } 82 83 // let's fill with a dummy node for now so we don't get a segfault 84 // on the first cycle when there's no node available. 85 static ProfileNode dummyNode; 86 profileNode = &dummyNode; 87 profilePC = 3; 88 89 if (use_kernel_stats) { 90 kernelStats = new TheISA::Kernel::Statistics(system); 91 } else { 92 kernelStats = NULL; 93 } 94} 95#else 96SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, 97 Process *_process, int _asid) 98 : ThreadState(_cpu, -1, _thread_num, _process, _asid), 99 cpu(_cpu) 100{ 101 regs.clear(); 102 tc = new ProxyThreadContext<SimpleThread>(this); 103} 104 105#endif 106 107SimpleThread::SimpleThread() 108#if FULL_SYSTEM 109 : ThreadState(NULL, -1, -1) 110#else 111 : ThreadState(NULL, -1, -1, NULL, -1) 112#endif 113{ 114 tc = new ProxyThreadContext<SimpleThread>(this); 115 regs.clear(); 116} 117 118SimpleThread::~SimpleThread() 119{ 120#if FULL_SYSTEM 121 delete physPort; 122 delete virtPort; 123#endif 124 delete tc; 125} 126 127void 128SimpleThread::takeOverFrom(ThreadContext *oldContext) 129{ 130 // some things should already be set up 131#if FULL_SYSTEM 132 assert(system == oldContext->getSystemPtr()); 133#else 134 assert(process == oldContext->getProcessPtr()); 135#endif 136 137 copyState(oldContext); 138#if FULL_SYSTEM 139 EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent(); 140 if (quiesce) { 141 // Point the quiesce event's TC at this TC so that it wakes up 142 // the proper CPU. 143 quiesce->tc = tc; 144 } 145 if (quiesceEvent) { 146 quiesceEvent->tc = tc; 147 } 148 149 TheISA::Kernel::Statistics *stats = oldContext->getKernelStats(); 150 if (stats) { 151 kernelStats = stats; 152 } 153#endif 154 155 storeCondFailures = 0; 156 157 oldContext->setStatus(ThreadContext::Unallocated); 158} 159 160void 161SimpleThread::copyTC(ThreadContext *context) 162{ 163 copyState(context); 164 165#if FULL_SYSTEM 166 EndQuiesceEvent *quiesce = context->getQuiesceEvent(); 167 if (quiesce) { 168 quiesceEvent = quiesce; 169 } 170 TheISA::Kernel::Statistics *stats = context->getKernelStats(); 171 if (stats) { 172 kernelStats = stats; 173 } 174#endif 175} 176 177void 178SimpleThread::copyState(ThreadContext *oldContext) 179{ 180 // copy over functional state 181 _status = oldContext->status(); 182 copyArchRegs(oldContext); 183 cpuId = oldContext->readCpuId(); 184#if !FULL_SYSTEM 185 funcExeInst = oldContext->readFuncExeInst(); 186#endif 187 inst = oldContext->getInst(); 188} 189 190void 191SimpleThread::serialize(ostream &os) 192{ 193 ThreadState::serialize(os); 194 regs.serialize(os); 195 // thread_num and cpu_id are deterministic from the config 196} 197 198 199void 200SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 201{ 202 ThreadState::unserialize(cp, section); 203 regs.unserialize(cp, section); 204 // thread_num and cpu_id are deterministic from the config 205} 206 207#if FULL_SYSTEM 208void 209SimpleThread::dumpFuncProfile() 210{ 211 std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); 212 profile->dump(tc, *os); 213} 214#endif 215 216void 217SimpleThread::activate(int delay) 218{ 219 if (status() == ThreadContext::Active) 220 return; 221 222 lastActivate = curTick; 223 224// if (status() == ThreadContext::Unallocated) { 225// cpu->activateWhenReady(tid); 226// return; 227// } 228 229 _status = ThreadContext::Active; 230 231 // status() == Suspended 232 cpu->activateContext(tid, delay); 233} 234 235void 236SimpleThread::suspend() 237{ 238 if (status() == ThreadContext::Suspended) 239 return; 240 241 lastActivate = curTick; 242 lastSuspend = curTick; 243/* 244#if FULL_SYSTEM 245 // Don't change the status from active if there are pending interrupts 246 if (cpu->check_interrupts()) { 247 assert(status() == ThreadContext::Active); 248 return; 249 } 250#endif 251*/ 252 _status = ThreadContext::Suspended; 253 cpu->suspendContext(tid); 254} 255 256void 257SimpleThread::deallocate() 258{ 259 if (status() == ThreadContext::Unallocated) 260 return; 261 262 _status = ThreadContext::Unallocated; 263 cpu->deallocateContext(tid); 264} 265 266void 267SimpleThread::halt() 268{ 269 if (status() == ThreadContext::Halted) 270 return; 271 272 _status = ThreadContext::Halted; 273 cpu->haltContext(tid); 274} 275 276 277void 278SimpleThread::regStats(const string &name) 279{ 280#if FULL_SYSTEM 281 if (kernelStats) 282 kernelStats->regStats(name + ".kern"); 283#endif 284} 285 286void 287SimpleThread::copyArchRegs(ThreadContext *src_tc) 288{ 289 TheISA::copyRegs(src_tc, tc); 290} 291 292#if FULL_SYSTEM 293VirtualPort* 294SimpleThread::getVirtPort(ThreadContext *src_tc) 295{ 296 if (!src_tc) 297 return virtPort; 298 299 VirtualPort *vp = new VirtualPort("tc-vport", src_tc); 300 connectToMemFunc(vp); 301 return vp; 302} 303 304void 305SimpleThread::delVirtPort(VirtualPort *vp) 306{ 307 if (vp != virtPort) { 308 vp->removeConn(); 309 delete vp; 310 } 311} 312 313#endif 314 315