2 * Copyright (c) 2008 The Regents of The University of Michigan
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31 #include "debug/I8254.hh"
32 #include "dev/x86/i8254.hh"
33 #include "dev/x86/intdev.hh"
34 #include "mem/packet.hh"
35 #include "mem/packet_access.hh"
38 X86ISA::I8254::counterInterrupt(unsigned int num
)
40 DPRINTF(I8254
, "Interrupt from counter %d.\n", num
);
49 X86ISA::I8254::read(PacketPtr pkt
)
51 assert(pkt
->getSize() == 1);
52 Addr offset
= pkt
->getAddr() - pioAddr
;
54 pkt
->set(pit
.readCounter(offset
));
55 } else if (offset
== 3) {
56 pkt
->set(uint8_t(-1));
58 panic("Read from undefined i8254 register.\n");
60 pkt
->makeAtomicResponse();
65 X86ISA::I8254::write(PacketPtr pkt
)
67 assert(pkt
->getSize() == 1);
68 Addr offset
= pkt
->getAddr() - pioAddr
;
70 pit
.writeCounter(offset
, pkt
->get
<uint8_t>());
71 } else if (offset
== 3) {
72 pit
.writeControl(pkt
->get
<uint8_t>());
74 panic("Write to undefined i8254 register.\n");
76 pkt
->makeAtomicResponse();
81 X86ISA::I8254::serialize(CheckpointOut
&cp
) const
83 pit
.serialize("pit", cp
);
87 X86ISA::I8254::unserialize(CheckpointIn
&cp
)
89 pit
.unserialize("pit", cp
);
93 X86ISA::I8254::startup()
101 return new X86ISA::I8254(this);