From 20de3bb759a36dbffed10adae2159e376b7cb68c Mon Sep 17 00:00:00 2001
From: Andreas Sandberg <andreas.sandberg@arm.com>
Date: Thu, 20 Jul 2017 11:58:06 +0100
Subject: dev: Move generic serial devices to src/dev/serial

Change-Id: I104227fc460f8b561e7375b329a541c1fce881b2
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/4291
Reviewed-by: Gabe Black <gabeblack@google.com>
---
 src/dev/serial/serial.cc | 95 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 src/dev/serial/serial.cc

(limited to 'src/dev/serial/serial.cc')

diff --git a/src/dev/serial/serial.cc b/src/dev/serial/serial.cc
new file mode 100644
index 000000000..873366860
--- /dev/null
+++ b/src/dev/serial/serial.cc
@@ -0,0 +1,95 @@
+/*
+ * 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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