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
  28 #include "dev/intpin.hh"
  29
  30 #include "base/logging.hh"
  31
  32 void
  33 IntSinkPinBase::bind(Port &peer)
  34 {
  35     source = dynamic_cast<IntSourcePinBase *>(&peer);
  36     fatal_if(!source, "Attempt to bind interrupt sink pin %s to "
  37             "incompatible port %s.", name(), peer.name());
  38     Port::bind(peer);
  39 }
  40
  41 void
  42 IntSinkPinBase::unbind()
  43 {
  44     source = nullptr;
  45     Port::unbind();
  46 }
  47
  48 void
  49 IntSourcePinBase::bind(Port &peer)
  50 {
  51     sink = dynamic_cast<IntSinkPinBase *>(&peer);
  52     fatal_if(!sink, "Attempt to bind interrupt source pin %s to "
  53             "incompatible port %s.", name(), peer.name());
  54     Port::bind(peer);
  55
  56     if (_state)
  57         raise();
  58     else
  59         lower();
  60 }
  61
  62 void
  63 IntSourcePinBase::unbind()
  64 {
  65     sink = nullptr;
  66     Port::unbind();
  67 }