device.cc revision 12653:4f6b6c1a8e2f 
1/*
2 * Copyright (c) 2017-2018 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2008 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Gabe Black
41 *          Andreas Sandberg
42 */
43
44#include "dev/ps2/device.hh"
45
46#include "base/logging.hh"
47#include "dev/ps2.hh"
48#include "params/PS2Device.hh"
49
50PS2Device::PS2Device(const PS2DeviceParams *p)
51    : SimObject(p)
52{
53}
54
55void
56PS2Device::serialize(CheckpointOut &cp) const
57{
58    std::vector<uint8_t> buffer(outBuffer.size());
59    std::copy(outBuffer.begin(), outBuffer.end(), buffer.begin());
60    arrayParamOut(cp, "outBuffer", buffer);
61}
62
63void
64PS2Device::unserialize(CheckpointIn &cp)
65{
66    std::vector<uint8_t> buffer;
67    arrayParamIn(cp, "outBuffer", buffer);
68    for (auto c : buffer)
69        outBuffer.push_back(c);
70}
71
72void
73PS2Device::hostRegDataAvailable(const std::function<void()> &c)
74{
75    fatal_if(dataAvailableCallback,
76             "A data pending callback has already been associated with this "
77             "PS/2 device.\n");
78
79    dataAvailableCallback = c;
80}
81
82uint8_t
83PS2Device::hostRead()
84{
85    uint8_t data = outBuffer.front();
86    outBuffer.pop_front();
87    return data;
88}
89
90void
91PS2Device::hostWrite(uint8_t c)
92{
93    recv(c);
94}
95
96void
97PS2Device::send(const uint8_t *data, size_t size)
98{
99    assert(data || size == 0);
100    while (size) {
101        outBuffer.push_back(*(data++));
102        size--;
103    }
104
105    // Registering a callback is optional.
106    if (dataAvailableCallback)
107        dataAvailableCallback();
108}
109
110void
111PS2Device::sendAck()
112{
113    send(Ps2::Ack);
114}
115