speaker.hh revision 5826
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 * Authors: Gabe Black 29 */ 30 31#ifndef __DEV_X86_SPEAKER_HH__ 32#define __DEV_X86_SPEAKER_HH__ 33 34#include "base/bitunion.hh" 35#include "params/PcSpeaker.hh" 36 37namespace X86ISA 38{ 39 40class I8254; 41 42class Speaker : public BasicPioDevice 43{ 44 protected: 45 Tick latency; 46 47 BitUnion8(SpeakerControl) 48 Bitfield<0> gate; 49 Bitfield<1> speaker; 50 Bitfield<5> timer; 51 EndBitUnion(SpeakerControl) 52 53 SpeakerControl controlVal; 54 55 I8254 * timer; 56 57 public: 58 typedef PcSpeakerParams Params; 59 60 const Params * 61 params() const 62 { 63 return dynamic_cast<const Params *>(_params); 64 } 65 66 Speaker(Params *p) : BasicPioDevice(p), 67 latency(p->pio_latency), controlVal(0), timer(p->i8254) 68 { 69 pioSize = 1; 70 } 71 72 Tick read(PacketPtr pkt); 73 74 Tick write(PacketPtr pkt); 75}; 76 77}; // namespace X86ISA 78 79#endif //__DEV_X86_SPEAKER_HH__ 80