97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
/*
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* Copyright (c) 2008 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include "dev/x86/speaker.hh"
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#include "base/bitunion.hh"
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#include "base/trace.hh"
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#include "debug/PcSpeaker.hh"
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#include "dev/x86/i8254.hh"
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#include "mem/packet.hh"
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#include "mem/packet_access.hh"
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Tick
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X86ISA::Speaker::read(PacketPtr pkt)
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{
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assert(pkt->getAddr() == pioAddr);
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assert(pkt->getSize() == 1);
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controlVal.timer = timer->outputHigh(2) ? 1 : 0;
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DPRINTF(PcSpeaker,
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"Reading from speaker device: gate %s, speaker %s, output %s.\n",
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controlVal.gate ? "on" : "off",
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controlVal.speaker ? "on" : "off",
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controlVal.timer ? "on" : "off");
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pkt->set((uint8_t)controlVal);
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pkt->makeAtomicResponse();
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return latency;
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}
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Tick
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X86ISA::Speaker::write(PacketPtr pkt)
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{
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assert(pkt->getAddr() == pioAddr);
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assert(pkt->getSize() == 1);
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SpeakerControl val = pkt->get<uint8_t>();
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controlVal.gate = val.gate;
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//Change the gate value in the timer.
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if (!val.gate)
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warn("The gate bit of the pc speaker isn't implemented and "
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"is always on.\n");
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//This would control whether the timer output is hooked up to a physical
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//speaker. Since M5 can't make noise, it's value doesn't actually do
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//anything.
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controlVal.speaker = val.speaker;
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DPRINTF(PcSpeaker, "Writing to speaker device: gate %s, speaker %s.\n",
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controlVal.gate ? "on" : "off", controlVal.speaker ? "on" : "off");
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pkt->makeAtomicResponse();
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return latency;
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}
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void
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X86ISA::Speaker::serialize(CheckpointOut &cp) const
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{
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uint8_t controlValData = controlVal.__data;
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SERIALIZE_SCALAR(controlValData);
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}
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void
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X86ISA::Speaker::unserialize(CheckpointIn &cp)
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{
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uint8_t controlValData;
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UNSERIALIZE_SCALAR(controlValData);
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controlVal.__data = controlValData;
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}
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X86ISA::Speaker *
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PcSpeakerParams::create()
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{
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return new X86ISA::Speaker(this);
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}
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