speaker.cc revision 5390 
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#include "base/bitunion.hh"
32#include "dev/x86/south_bridge/speaker.hh"
33#include "mem/packet_access.hh"
34
35BitUnion8(SpeakerControl)
36    Bitfield<0> gate;
37    Bitfield<1> speaker;
38    Bitfield<5> timer;
39EndBitUnion(SpeakerControl)
40
41Tick
42X86ISA::Speaker::read(PacketPtr pkt)
43{
44    assert(pkt->getAddr() == addrRange.start);
45    assert(pkt->getSize() == 1);
46    SpeakerControl val = 0xFF;
47    warn("Reading from speaker device: gate %s, speaker %s, output %s.\n",
48            val.gate ? "on" : "off",
49            val.speaker ? "on" : "off",
50            val.timer ? "on" : "off");
51    pkt->set((uint8_t)val);
52    return latency;
53}
54
55Tick
56X86ISA::Speaker::write(PacketPtr pkt)
57{
58    assert(pkt->getAddr() == addrRange.start);
59    assert(pkt->getSize() == 1);
60    SpeakerControl val = pkt->get<uint8_t>();
61    warn("Writing to speaker device: gate %s, speaker %s.\n",
62            val.gate ? "on" : "off", val.speaker ? "on" : "off");
63    return latency;
64}
65