pic2(0xA0, 2, p->pio_latency),
pit(p->name + ".pit", 0x40, 4, p->pio_latency),
cmos(0x70, 2, p->pio_latency),
- speaker(0x61, 1, p->pio_latency)
+ speaker(&pit, 0x61, 1, p->pio_latency)
{
addDevice(pic1);
addDevice(pic2);
/*
- * Copyright (c) 2004-2005 The Regents of The University of Michigan
+ * Copyright (c) 2008 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "base/bitunion.hh"
+#include "base/trace.hh"
+#include "dev/x86/south_bridge/i8254.hh"
#include "dev/x86/south_bridge/speaker.hh"
#include "mem/packet_access.hh"
-BitUnion8(SpeakerControl)
- Bitfield<0> gate;
- Bitfield<1> speaker;
- Bitfield<5> timer;
-EndBitUnion(SpeakerControl)
-
Tick
X86ISA::Speaker::read(PacketPtr pkt)
{
assert(pkt->getAddr() == addrRange.start);
assert(pkt->getSize() == 1);
- SpeakerControl val = 0xFF;
- warn("Reading from speaker device: gate %s, speaker %s, output %s.\n",
- val.gate ? "on" : "off",
- val.speaker ? "on" : "off",
- val.timer ? "on" : "off");
- pkt->set((uint8_t)val);
+ controlVal.timer = timer->pit.counter2.outputHigh() ? 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);
return latency;
}
assert(pkt->getAddr() == addrRange.start);
assert(pkt->getSize() == 1);
SpeakerControl val = pkt->get<uint8_t>();
- warn("Writing to speaker device: gate %s, speaker %s.\n",
- val.gate ? "on" : "off", val.speaker ? "on" : "off");
+ 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");
return latency;
}
/*
- * Copyright (c) 2004-2005 The Regents of The University of Michigan
+ * Copyright (c) 2008 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
namespace X86ISA
{
+class I8254;
+
class Speaker : public SubDevice
{
+ protected:
+ BitUnion8(SpeakerControl)
+ Bitfield<0> gate;
+ Bitfield<1> speaker;
+ Bitfield<5> timer;
+ EndBitUnion(SpeakerControl)
+
+ SpeakerControl controlVal;
+
+ I8254 * timer;
+
public:
- Speaker()
+ Speaker(I8254 * _timer) : timer(_timer)
{}
- Speaker(Tick _latency) : SubDevice(_latency)
+ Speaker(I8254 * _timer, Tick _latency) :
+ SubDevice(_latency), timer(_timer)
{}
- Speaker(Addr start, Addr size, Tick _latency) :
- SubDevice(start, size, _latency)
+ Speaker(I8254 * _timer, Addr start, Addr size, Tick _latency) :
+ SubDevice(start, size, _latency), timer(_timer)
{}
Tick read(PacketPtr pkt);