1 files changed, 79 insertions, 0 deletions
diff --git a/src/dev/x86/speaker.cc b/src/dev/x86/speaker.cc
new file mode 100644
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+++ b/src/dev/x86/speaker.cc
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+/*
+ * Copyright (c) 2008 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * 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: Gabe Black
+ */
+
+#include "base/bitunion.hh"
+#include "base/trace.hh"
+#include "dev/x86/i8254.hh"
+#include "dev/x86/speaker.hh"
+#include "mem/packet.hh"
+#include "mem/packet_access.hh"
+
+Tick
+X86ISA::Speaker::read(PacketPtr pkt)
+{
+    assert(pkt->getAddr() == pioAddr);
+    assert(pkt->getSize() == 1);
+    controlVal.timer = timer->outputHigh(2) ? 1 : 0;
+    DPRINTF(PcSpeaker,
+            "Reading from speaker device: gate %s, speaker %s, output %s.\n",
+            controlVal.gate ? "on" : "off",
+            controlVal.speaker ? "on" : "off",
+            controlVal.timer ? "on" : "off");
+    pkt->set((uint8_t)controlVal);
+    pkt->makeAtomicResponse();
+    return latency;
+}
+
+Tick
+X86ISA::Speaker::write(PacketPtr pkt)
+{
+    assert(pkt->getAddr() == pioAddr);
+    assert(pkt->getSize() == 1);
+    SpeakerControl val = pkt->get<uint8_t>();
+    controlVal.gate = val.gate;
+    //Change the gate value in the timer.
+    if (!val.gate)
+        warn("The gate bit of the pc speaker isn't implemented and "
+                "is always on.\n");
+    //This would control whether the timer output is hooked up to a physical
+    //speaker. Since M5 can't make noise, it's value doesn't actually do
+    //anything.
+    controlVal.speaker = val.speaker;
+    DPRINTF(PcSpeaker, "Writing to speaker device: gate %s, speaker %s.\n",
+            controlVal.gate ? "on" : "off", controlVal.speaker ? "on" : "off");
+    pkt->makeAtomicResponse();
+    return latency;
+}
+
+X86ISA::Speaker *
+PcSpeakerParams::create()
+{
+    return new X86ISA::Speaker(this);
+}