src/dev/x86/i8237.hh

   1 /*
   2  * Copyright (c) 2008 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 #ifndef __DEV_X86_I8237_HH__
  30 #define __DEV_X86_I8237_HH__
  31
  32 #include "dev/io_device.hh"
  33 #include "params/I8237.hh"
  34
  35 namespace X86ISA
  36 {
  37
  38 class I8237 : public BasicPioDevice
  39 {
  40   protected:
  41     Tick latency;
  42     uint8_t maskReg;
  43
  44   public:
  45     typedef I8237Params Params;
  46
  47     const Params *
  48     params() const
  49     {
  50         return dynamic_cast<const Params *>(_params);
  51     }
  52
  53     I8237(Params *p) : BasicPioDevice(p, 16), latency(p->pio_latency), maskReg(0)
  54     {
  55     }
  56     Tick read(PacketPtr pkt) override;
  57
  58     Tick write(PacketPtr pkt) override;
  59
  60     void serialize(CheckpointOut &cp) const override;
  61     void unserialize(CheckpointIn &cp) override;
  62 };
  63
  64 } // namespace X86ISA
  65
  66 #endif //__DEV_X86_I8237_HH__