simple_thread.cc revision 2864
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, _process, _asid, memobj), 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} 125 126#endif 127 128SimpleThread::SimpleThread() 129#if FULL_SYSTEM 130 : ThreadState(-1, -1) 131#else 132 : ThreadState(-1, -1, NULL, -1, NULL) 133#endif 134{ 135 tc = new ProxyThreadContext<SimpleThread>(this); 136 regs.clear(); 137} 138 139SimpleThread::~SimpleThread() 140{ 141 delete tc; 142} 143 144void 145SimpleThread::takeOverFrom(ThreadContext *oldContext) 146{ 147 // some things should already be set up 148#if FULL_SYSTEM 149 assert(system == oldContext->getSystemPtr()); 150#else 151 assert(process == oldContext->getProcessPtr()); 152#endif 153 154 copyState(oldContext); 155#if FULL_SYSTEM 156 EndQuiesceEvent *quiesce = oldContext->getQuiesceEvent(); 157 if (quiesce) { 158 // Point the quiesce event's TC at this TC so that it wakes up 159 // the proper CPU. 160 quiesce->tc = tc; 161 } 162 if (quiesceEvent) { 163 quiesceEvent->tc = tc; 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} 200 201void 202SimpleThread::serialize(ostream &os) 203{ 204 ThreadState::serialize(os); 205 regs.serialize(os); 206 // thread_num and cpu_id are deterministic from the config 207} 208 209 210void 211SimpleThread::unserialize(Checkpoint *cp, const std::string §ion) 212{ 213 ThreadState::unserialize(cp, section); 214 regs.unserialize(cp, section); 215 // thread_num and cpu_id are deterministic from the config 216} 217 218#if FULL_SYSTEM 219void 220SimpleThread::dumpFuncProfile() 221{ 222 std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name())); 223 profile->dump(tc, *os); 224} 225#endif 226 227void 228SimpleThread::activate(int delay) 229{ 230 if (status() == ThreadContext::Active) 231 return; 232 233 lastActivate = curTick; 234 235 if (status() == ThreadContext::Unallocated) { 236 cpu->activateWhenReady(tid); 237 return; 238 } 239 240 _status = ThreadContext::Active; 241 242 // status() == Suspended 243 cpu->activateContext(tid, delay); 244} 245 246void 247SimpleThread::suspend() 248{ 249 if (status() == ThreadContext::Suspended) 250 return; 251 252 lastActivate = curTick; 253 lastSuspend = curTick; 254/* 255#if FULL_SYSTEM 256 // Don't change the status from active if there are pending interrupts 257 if (cpu->check_interrupts()) { 258 assert(status() == ThreadContext::Active); 259 return; 260 } 261#endif 262*/ 263 _status = ThreadContext::Suspended; 264 cpu->suspendContext(tid); 265} 266 267void 268SimpleThread::deallocate() 269{ 270 if (status() == ThreadContext::Unallocated) 271 return; 272 273 _status = ThreadContext::Unallocated; 274 cpu->deallocateContext(tid); 275} 276 277void 278SimpleThread::halt() 279{ 280 if (status() == ThreadContext::Halted) 281 return; 282 283 _status = ThreadContext::Halted; 284 cpu->haltContext(tid); 285} 286 287 288void 289SimpleThread::regStats(const string &name) 290{ 291#if FULL_SYSTEM 292 if (kernelStats) 293 kernelStats->regStats(name + ".kern"); 294#endif 295} 296 297void 298SimpleThread::copyArchRegs(ThreadContext *src_tc) 299{ 300 TheISA::copyRegs(src_tc, tc); 301} 302 303#if FULL_SYSTEM 304VirtualPort* 305SimpleThread::getVirtPort(ThreadContext *src_tc) 306{ 307 if (!src_tc) 308 return virtPort; 309 310 VirtualPort *vp; 311 Port *mem_port; 312 313 vp = new VirtualPort("tc-vport", src_tc); 314 mem_port = system->physmem->getPort("functional"); 315 mem_port->setPeer(vp); 316 vp->setPeer(mem_port); 317 return vp; 318} 319 320void 321SimpleThread::delVirtPort(VirtualPort *vp) 322{ 323 if (vp != virtPort) { 324 delete vp->getPeer(); 325 delete vp; 326 } 327} 328 329 330#endif 331 332