simple_thread.cc revision 3486
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 "base/callback.hh" 43#include "base/cprintf.hh" 44#include "base/output.hh" 45#include "base/trace.hh" 46#include "cpu/profile.hh" 47#include "cpu/quiesce_event.hh" 48#include "kern/kernel_stats.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 AlphaITB *_itb, AlphaDTB *_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 Kernel::Statistics(system); 91 } else { 92 kernelStats = NULL; 93 } 94 Port *mem_port; 95 physPort = new FunctionalPort(csprintf("%s-%d-funcport", 96 cpu->name(), tid)); 97 mem_port = system->physmem->getPort("functional"); 98 mem_port->setPeer(physPort); 99 physPort->setPeer(mem_port); 100 101 virtPort = new VirtualPort(csprintf("%s-%d-vport", 102 cpu->name(), tid)); 103 mem_port = system->physmem->getPort("functional"); 104 mem_port->setPeer(virtPort); 105 virtPort->setPeer(mem_port); 106} 107#else 108SimpleThread::SimpleThread(BaseCPU *_cpu, int _thread_num, 109 Process *_process, int _asid) 110 : ThreadState(_cpu, -1, _thread_num, _process, _asid), 111 cpu(_cpu) 112{ 113 regs.clear(); 114 tc = new ProxyThreadContext<SimpleThread>(this); 115} 116 117#endif 118 119SimpleThread::SimpleThread() 120#if FULL_SYSTEM 121 : ThreadState(NULL, -1, -1) 122#else 123 : ThreadState(NULL, -1, -1, NULL, -1) 124#endif 125{ 126 tc = new ProxyThreadContext<SimpleThread>(this); 127 regs.clear(); 128} 129 130SimpleThread::~SimpleThread() 131{ 132#if FULL_SYSTEM 133 delete physPort; 134 delete virtPort; 135#endif 136 delete tc; 137} 138 139void 140SimpleThread::takeOverFrom(ThreadContext *oldContext) 141{ 142 // some things should already be set up 143#if FULL_SYSTEM 144 assert(system == oldContext->getSystemPtr()); 145#else 146 assert(process == oldContext->getProcessPtr()); 147#endif 148 149 copyState(oldContext); 150#if FULL_SYSTEM 151 EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent(); 152 if (quiesce) { 153 // Point the quiesce event's TC at this TC so that it wakes up 154 // the proper CPU. 155 quiesce->tc = tc; 156 } 157 if (quiesceEvent) { 158 quiesceEvent->tc = tc; 159 } 160 161 Kernel::Statistics *stats = oldContext->getKernelStats(); 162 if (stats) { 163 kernelStats = stats; 164 } 165#endif 166 167 storeCondFailures = 0; 168 169 oldContext->setStatus(ThreadContext::Unallocated); 170} 171 172void 173SimpleThread::copyTC(ThreadContext *context) 174{ 175 copyState(context); 176 177#if FULL_SYSTEM 178 EndQuiesceEvent *quiesce = context->getQuiesceEvent(); 179 if (quiesce) { 180 quiesceEvent = quiesce; 181 } 182 Kernel::Statistics *stats = context->getKernelStats(); 183 if (stats) { 184 kernelStats = stats; 185 } 186#endif 187} 188 189void 190SimpleThread::copyState(ThreadContext *oldContext) 191{ 192 // copy over functional state 193 _status = oldContext->status(); 194 copyArchRegs(oldContext); 195 cpuId = oldContext->readCpuId(); 196#if !FULL_SYSTEM 197 funcExeInst = oldContext->readFuncExeInst(); 198#endif 199 inst = oldContext->getInst(); 200} 201 202void 203SimpleThread::serialize(ostream &os) 204{ 205 ThreadState::serialize(os); 206 regs.serialize(os); 207 // thread_num and cpu_id are deterministic from the config 208} 209 210 211void 212SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 213{ 214 ThreadState::unserialize(cp, section); 215 regs.unserialize(cp, section); 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(tid); 238 return; 239 } 240 241 _status = ThreadContext::Active; 242 243 // status() == Suspended 244 cpu->activateContext(tid, 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->check_interrupts()) { 259 assert(status() == ThreadContext::Active); 260 return; 261 } 262#endif 263*/ 264 _status = ThreadContext::Suspended; 265 cpu->suspendContext(tid); 266} 267 268void 269SimpleThread::deallocate() 270{ 271 if (status() == ThreadContext::Unallocated) 272 return; 273 274 _status = ThreadContext::Unallocated; 275 cpu->deallocateContext(tid); 276} 277 278void 279SimpleThread::halt() 280{ 281 if (status() == ThreadContext::Halted) 282 return; 283 284 _status = ThreadContext::Halted; 285 cpu->haltContext(tid); 286} 287 288 289void 290SimpleThread::regStats(const string &name) 291{ 292#if FULL_SYSTEM 293 if (kernelStats) 294 kernelStats->regStats(name + ".kern"); 295#endif 296} 297 298void 299SimpleThread::copyArchRegs(ThreadContext *src_tc) 300{ 301 TheISA::copyRegs(src_tc, tc); 302} 303 304#if FULL_SYSTEM 305VirtualPort* 306SimpleThread::getVirtPort(ThreadContext *src_tc) 307{ 308 if (!src_tc) 309 return virtPort; 310 311 VirtualPort *vp = new VirtualPort("tc-vport", src_tc); 312 Port *mem_port = getMemFuncPort(); 313 314 mem_port->setPeer(vp); 315 vp->setPeer(mem_port); 316 return vp; 317} 318 319void 320SimpleThread::delVirtPort(VirtualPort *vp) 321{ 322 if (vp != virtPort) { 323 delete vp->getPeer(); 324 delete vp; 325 } 326} 327 328#endif 329 330