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
  29 #include "cpu/base.hh"
  30 #include "cpu/cpu_exec_context.hh"
  31 #include "kern/kernel_stats.hh"
  32 #include "kern/system_events.hh"
  33 #include "sim/system.hh"
  34
  35 using namespace TheISA;
  36
  37 void
  38 SkipFuncEvent::process(ExecContext *xc)
  39 {
  40     Addr newpc = xc->readIntReg(ReturnAddressReg);
  41
  42     DPRINTF(PCEvent, "skipping %s: pc=%x, newpc=%x\n", description,
  43             xc->readPC(), newpc);
  44
  45     xc->setPC(newpc);
  46     xc->setNextPC(xc->readPC() + sizeof(TheISA::MachInst));
  47 /*
  48     BranchPred *bp = xc->getCpuPtr()->getBranchPred();
  49     if (bp != NULL) {
  50         bp->popRAS(xc->getThreadNum());
  51     }
  52 */
  53 }
  54
  55
  56 FnEvent::FnEvent(PCEventQueue *q, const std::string &desc, Addr addr,
  57                  Stats::MainBin *bin)
  58     : PCEvent(q, desc, addr), _name(desc), mybin(bin)
  59 {
  60 }
  61
  62 void
  63 FnEvent::process(ExecContext *xc)
  64 {
  65     if (xc->misspeculating())
  66         return;
  67
  68     xc->getSystemPtr()->kernelBinning->call(xc, mybin);
  69 }
  70
  71 void
  72 IdleStartEvent::process(ExecContext *xc)
  73 {
  74     xc->getCpuPtr()->kernelStats->setIdleProcess(
  75         xc->readMiscReg(AlphaISA::IPR_PALtemp23), xc);
  76     remove();
  77 }
  78
  79 void
  80 InterruptStartEvent::process(ExecContext *xc)
  81 {
  82     xc->getCpuPtr()->kernelStats->mode(Kernel::interrupt, xc);
  83 }
  84
  85 void
  86 InterruptEndEvent::process(ExecContext *xc)
  87 {
  88     // We go back to kernel, if we are user, inside the rti
  89     // pal code we will get switched to user because of the ICM write
  90     xc->getCpuPtr()->kernelStats->mode(Kernel::kernel, xc);
  91 }