2 * Copyright (c) 2014 ARM Limited
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.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Authors: Andreas Sandberg
40 #include "dev/virtio/console.hh"
42 #include "debug/VIOConsole.hh"
43 #include "params/VirtIOConsole.hh"
44 #include "sim/system.hh"
46 VirtIOConsole::VirtIOConsole(Params
*params
)
47 : VirtIODeviceBase(params
, ID_CONSOLE
, sizeof(Config
), F_SIZE
),
48 qRecv(params
->system
->physProxy
, byteOrder
, params
->qRecvSize
, *this),
49 qTrans(params
->system
->physProxy
, byteOrder
, params
->qTransSize
, *this),
50 device(*params
->device
), callbackDataAvail(qRecv
)
53 registerQueue(qTrans
);
58 device
.regInterfaceCallback(&callbackDataAvail
);
62 VirtIOConsole::~VirtIOConsole()
66 VirtIOConsole::readConfig(PacketPtr pkt
, Addr cfgOffset
)
69 cfg_out
.rows
= htog(config
.rows
, byteOrder
);
70 cfg_out
.cols
= htog(config
.cols
, byteOrder
);
72 readConfigBlob(pkt
, cfgOffset
, (uint8_t *)&cfg_out
);
76 VirtIOConsole::TermRecvQueue::trySend()
78 DPRINTF(VIOConsole
, "trySend\n");
80 // Send data as long as the terminal has outgoing data and we can
81 // get free descriptors (i.e., there are buffers available to
82 // send) from the guest.
84 while (parent
.device
.dataAvailable() && (d
= consumeDescriptor())) {
85 DPRINTF(VIOConsole
, "Got descriptor (len: %i)\n", d
->size());
87 while (parent
.device
.dataAvailable() && len
< d
->size()) {
88 uint8_t in(parent
.device
.readData());
89 d
->chainWrite(len
, &in
, sizeof(uint8_t));
93 // Tell the guest that we are done with this descriptor.
94 produceDescriptor(d
, len
);
100 VirtIOConsole::TermTransQueue::onNotifyDescriptor(VirtDescriptor
*desc
)
102 DPRINTF(VIOConsole
, "Got input data descriptor (len: %i)\n",
105 // Copy the data from the guest and forward it to the
107 const size_t size(desc
->chainSize());
109 desc
->chainRead(0, data
, size
);
110 for (int i
= 0; i
< desc
->size(); ++i
)
111 parent
.device
.writeData(data
[i
]);
113 // Tell the guest that we are done with this descriptor.
114 produceDescriptor(desc
, 0);
119 VirtIOConsoleParams::create()
121 return new VirtIOConsole(this);