src/kern/system_events.cc

   1 /*
   2  * Copyright (c) 2004-2005 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: Lisa Hsu
  29  *          Nathan Binkert
  30  */
  31
  32 #include "cpu/base.hh"
  33 #include "cpu/thread_context.hh"
  34 #include "kern/kernel_stats.hh"
  35 #include "kern/system_events.hh"
  36 #include "sim/system.hh"
  37
  38 using namespace TheISA;
  39
  40 void
  41 SkipFuncEvent::process(ThreadContext *tc)
  42 {
  43     Addr newpc = tc->readIntReg(ReturnAddressReg);
  44
  45     DPRINTF(PCEvent, "skipping %s: pc=%x, newpc=%x\n", description,
  46             tc->readPC(), newpc);
  47
  48     tc->setPC(newpc);
  49     tc->setNextPC(tc->readPC() + sizeof(TheISA::MachInst));
  50 /*
  51     BranchPred *bp = tc->getCpuPtr()->getBranchPred();
  52     if (bp != NULL) {
  53         bp->popRAS(tc->getThreadNum());
  54     }
  55 */
  56 }
  57
  58 void
  59 IdleStartEvent::process(ThreadContext *tc)
  60 {
  61     if (tc->getKernelStats())
  62         tc->getKernelStats()->setIdleProcess(
  63             tc->readMiscReg(AlphaISA::IPR_PALtemp23), tc);
  64     remove();
  65 }