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