src/dev/x86/i8259.hh

   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: Gabe Black
  29  */
  30
  31 #ifndef __DEV_X86_I8259_HH__
  32 #define __DEV_X86_I8259_HH__
  33
  34 #include "dev/io_device.hh"
  35 #include "params/I8259.hh"
  36
  37 namespace X86ISA
  38 {
  39
  40 class I8259 : public BasicPioDevice
  41 {
  42   protected:
  43     Tick latency;
  44     bool master;
  45
  46   public:
  47     typedef I8259Params Params;
  48
  49     const Params *
  50     params() const
  51     {
  52         return dynamic_cast<const Params *>(_params);
  53     }
  54
  55     I8259(Params * p) : BasicPioDevice(p)
  56     {
  57         pioSize = 2;
  58         latency = p->pio_latency;
  59         master = p->master;
  60     }
  61
  62     Tick read(PacketPtr pkt);
  63
  64     Tick write(PacketPtr pkt);
  65 };
  66
  67 }; // namespace X86ISA
  68
  69 #endif //__DEV_X86_I8259_HH__