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/*
* Copyright (c) 2008 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#ifndef __DEV_X86_SPEAKER_HH__
#define __DEV_X86_SPEAKER_HH__
#include "base/bitunion.hh"
#include "dev/io_device.hh"
#include "params/PcSpeaker.hh"
namespace X86ISA
{
class I8254;
class Speaker : public BasicPioDevice
{
protected:
Tick latency;
BitUnion8(SpeakerControl)
Bitfield<0> gate;
Bitfield<1> speaker;
Bitfield<5> timer;
EndBitUnion(SpeakerControl)
SpeakerControl controlVal;
I8254 * timer;
public:
typedef PcSpeakerParams Params;
const Params *
params() const
{
return dynamic_cast<const Params *>(_params);
}
Speaker(Params *p) : BasicPioDevice(p, 1),
latency(p->pio_latency), controlVal(0), timer(p->i8254)
{
}
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
};
} // namespace X86ISA
#endif //__DEV_X86_SPEAKER_HH__
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