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/*
* Copyright (c) 2014, 2017 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andreas Sandberg
*/
#include "dev/serial/serial.hh"
#include "base/misc.hh"
#include "params/SerialDevice.hh"
#include "params/SerialNullDevice.hh"
SerialDevice::SerialDevice(const SerialDeviceParams *p)
: SimObject(p), interfaceCallback(nullptr)
{
}
SerialDevice::~SerialDevice()
{
}
void
SerialDevice::regInterfaceCallback(Callback *c)
{
// This can happen if the user has connected multiple UARTs to the
// same terminal. In that case, each of them tries to register
// callbacks.
if (interfaceCallback)
fatal("A UART has already been associated with this device.\n");
interfaceCallback = c;
}
void
SerialDevice::notifyInterface()
{
assert(dataAvailable());
// Registering a callback is optional.
if (interfaceCallback)
interfaceCallback->process();
}
SerialNullDevice::SerialNullDevice(const SerialNullDeviceParams *p)
: SerialDevice(p)
{
}
uint8_t
SerialNullDevice::readData()
{
panic("SerialNullDevice does not have pending data.\n");
}
SerialNullDevice *
SerialNullDeviceParams::create()
{
return new SerialNullDevice(this);
}
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