src/dev/intpin.cc

   1 /*
   2  * Copyright 2019 Google, Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met: redistributions of source code must retain the above copyright
   7  * notice, this list of conditions and the following disclaimer;
   8  * redistributions in binary form must reproduce the above copyright
   9  * notice, this list of conditions and the following disclaimer in the
  10  * documentation and/or other materials provided with the distribution;
  11  * neither the name of the copyright holders nor the names of its
  12  * contributors may be used to endorse or promote products derived from
  13  * this software without specific prior written permission.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  18  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  19  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  21  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  * Authors: Gabe Black
  28  */
  29
  30 #include "dev/intpin.hh"
  31
  32 #include "base/logging.hh"
  33
  34 void
  35 IntSinkPinBase::bind(Port &peer)
  36 {
  37     source = dynamic_cast<IntSourcePinBase *>(&peer);
  38     fatal_if(!source, "Attempt to bind interrupt sink pin %s to "
  39             "incompatible port %s.", name(), peer.name());
  40     Port::bind(peer);
  41 }
  42
  43 void
  44 IntSinkPinBase::unbind()
  45 {
  46     source = nullptr;
  47     Port::unbind();
  48 }
  49
  50 void
  51 IntSourcePinBase::bind(Port &peer)
  52 {
  53     sink = dynamic_cast<IntSinkPinBase *>(&peer);
  54     fatal_if(!sink, "Attempt to bind interrupt source pin %s to "
  55             "incompatible port %s.", name(), peer.name());
  56     Port::bind(peer);
  57
  58     if (_state)
  59         raise();
  60     else
  61         lower();
  62 }
  63
  64 void
  65 IntSourcePinBase::unbind()
  66 {
  67     sink = nullptr;
  68     Port::unbind();
  69 }