simple_thread.cc revision 2684:71f3cabf891f
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(-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, MemObject* memobj) 110 : ThreadState(-1, _thread_num, memobj, _process, _asid), 111 cpu(_cpu) 112{ 113 /* Use this port to for syscall emulation writes to memory. */ 114 Port *mem_port; 115 port = new TranslatingPort(csprintf("%s-%d-funcport", 116 cpu->name(), tid), 117 process->pTable, false); 118 mem_port = memobj->getPort("functional"); 119 mem_port->setPeer(port); 120 port->setPeer(mem_port); 121 122 regs.clear(); 123 tc = new ProxyThreadContext<SimpleThread>(this); 124} 125 126SimpleThread::SimpleThread(RegFile *regFile) 127 : ThreadState(-1, -1, NULL, NULL, -1), cpu(NULL) 128{ 129 regs = *regFile; 130 tc = new ProxyThreadContext<SimpleThread>(this); 131} 132 133#endif 134 135SimpleThread::~SimpleThread() 136{ 137 delete tc; 138} 139 140void 141SimpleThread::takeOverFrom(ThreadContext *oldContext) 142{ 143 // some things should already be set up 144#if FULL_SYSTEM 145 assert(system == oldContext->getSystemPtr()); 146#else 147 assert(process == oldContext->getProcessPtr()); 148#endif 149 150 // copy over functional state 151 _status = oldContext->status(); 152 copyArchRegs(oldContext); 153 cpuId = oldContext->readCpuId(); 154#if !FULL_SYSTEM 155 funcExeInst = oldContext->readFuncExeInst(); 156#else 157 EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent(); 158 if (quiesce) { 159 // Point the quiesce event's TC at this TC so that it wakes up 160 // the proper CPU. 161 quiesce->tc = tc; 162 } 163 if (quiesceEvent) { 164 quiesceEvent->tc = tc; 165 } 166#endif 167 168 storeCondFailures = 0; 169 170 oldContext->setStatus(ThreadContext::Unallocated); 171} 172 173void 174SimpleThread::serialize(ostream &os) 175{ 176 SERIALIZE_ENUM(_status); 177 regs.serialize(os); 178 // thread_num and cpu_id are deterministic from the config 179 SERIALIZE_SCALAR(funcExeInst); 180 SERIALIZE_SCALAR(inst); 181 182#if FULL_SYSTEM 183 Tick quiesceEndTick = 0; 184 if (quiesceEvent->scheduled()) 185 quiesceEndTick = quiesceEvent->when(); 186 SERIALIZE_SCALAR(quiesceEndTick); 187 if (kernelStats) 188 kernelStats->serialize(os); 189#endif 190} 191 192 193void 194SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 195{ 196 UNSERIALIZE_ENUM(_status); 197 regs.unserialize(cp, section); 198 // thread_num and cpu_id are deterministic from the config 199 UNSERIALIZE_SCALAR(funcExeInst); 200 UNSERIALIZE_SCALAR(inst); 201 202#if FULL_SYSTEM 203 Tick quiesceEndTick; 204 UNSERIALIZE_SCALAR(quiesceEndTick); 205 if (quiesceEndTick) 206 quiesceEvent->schedule(quiesceEndTick); 207 if (kernelStats) 208 kernelStats->unserialize(cp, section); 209#endif 210} 211 212#if FULL_SYSTEM 213void 214SimpleThread::dumpFuncProfile() 215{ 216 std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); 217 profile->dump(tc, *os); 218} 219#endif 220 221void 222SimpleThread::activate(int delay) 223{ 224 if (status() == ThreadContext::Active) 225 return; 226 227 lastActivate = curTick; 228 229 if (status() == ThreadContext::Unallocated) { 230 cpu->activateWhenReady(tid); 231 return; 232 } 233 234 _status = ThreadContext::Active; 235 236 // status() == Suspended 237 cpu->activateContext(tid, delay); 238} 239 240void 241SimpleThread::suspend() 242{ 243 if (status() == ThreadContext::Suspended) 244 return; 245 246 lastActivate = curTick; 247 lastSuspend = curTick; 248/* 249#if FULL_SYSTEM 250 // Don't change the status from active if there are pending interrupts 251 if (cpu->check_interrupts()) { 252 assert(status() == ThreadContext::Active); 253 return; 254 } 255#endif 256*/ 257 _status = ThreadContext::Suspended; 258 cpu->suspendContext(tid); 259} 260 261void 262SimpleThread::deallocate() 263{ 264 if (status() == ThreadContext::Unallocated) 265 return; 266 267 _status = ThreadContext::Unallocated; 268 cpu->deallocateContext(tid); 269} 270 271void 272SimpleThread::halt() 273{ 274 if (status() == ThreadContext::Halted) 275 return; 276 277 _status = ThreadContext::Halted; 278 cpu->haltContext(tid); 279} 280 281 282void 283SimpleThread::regStats(const string &name) 284{ 285#if FULL_SYSTEM 286 if (kernelStats) 287 kernelStats->regStats(name + ".kern"); 288#endif 289} 290 291void 292SimpleThread::copyArchRegs(ThreadContext *src_tc) 293{ 294 TheISA::copyRegs(src_tc, tc); 295} 296 297#if FULL_SYSTEM 298VirtualPort* 299SimpleThread::getVirtPort(ThreadContext *src_tc) 300{ 301 if (!src_tc) 302 return virtPort; 303 304 VirtualPort *vp; 305 Port *mem_port; 306 307 vp = new VirtualPort("tc-vport", src_tc); 308 mem_port = system->physmem->getPort("functional"); 309 mem_port->setPeer(vp); 310 vp->setPeer(mem_port); 311 return vp; 312} 313 314void 315SimpleThread::delVirtPort(VirtualPort *vp) 316{ 317 if (vp != virtPort) { 318 delete vp->getPeer(); 319 delete vp; 320 } 321} 322 323 324#endif 325 326