i8254.cc (11793:ef606668d247) i8254.cc (13229:b45254f2733a)
1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "dev/x86/i8254.hh"
32
33#include "debug/I8254.hh"
34#include "dev/x86/intdev.hh"
35#include "mem/packet.hh"
36#include "mem/packet_access.hh"
37
38void
39X86ISA::I8254::counterInterrupt(unsigned int num)
40{
41 DPRINTF(I8254, "Interrupt from counter %d.\n", num);
42 if (num == 0) {
43 intPin->raise();
44 //XXX This is a hack.
45 intPin->lower();
46 }
47}
48
49Tick
50X86ISA::I8254::read(PacketPtr pkt)
51{
52 assert(pkt->getSize() == 1);
53 Addr offset = pkt->getAddr() - pioAddr;
54 if (offset < 3) {
1/*
2 * Copyright (c) 2008 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include "dev/x86/i8254.hh"
32
33#include "debug/I8254.hh"
34#include "dev/x86/intdev.hh"
35#include "mem/packet.hh"
36#include "mem/packet_access.hh"
37
38void
39X86ISA::I8254::counterInterrupt(unsigned int num)
40{
41 DPRINTF(I8254, "Interrupt from counter %d.\n", num);
42 if (num == 0) {
43 intPin->raise();
44 //XXX This is a hack.
45 intPin->lower();
46 }
47}
48
49Tick
50X86ISA::I8254::read(PacketPtr pkt)
51{
52 assert(pkt->getSize() == 1);
53 Addr offset = pkt->getAddr() - pioAddr;
54 if (offset < 3) {
55 pkt->set(pit.readCounter(offset));
55 pkt->setLE(pit.readCounter(offset));
56 } else if (offset == 3) {
56 } else if (offset == 3) {
57 pkt->set(uint8_t(-1));
57 pkt->setLE(uint8_t(-1));
58 } else {
59 panic("Read from undefined i8254 register.\n");
60 }
61 pkt->makeAtomicResponse();
62 return latency;
63}
64
65Tick
66X86ISA::I8254::write(PacketPtr pkt)
67{
68 assert(pkt->getSize() == 1);
69 Addr offset = pkt->getAddr() - pioAddr;
70 if (offset < 3) {
58 } else {
59 panic("Read from undefined i8254 register.\n");
60 }
61 pkt->makeAtomicResponse();
62 return latency;
63}
64
65Tick
66X86ISA::I8254::write(PacketPtr pkt)
67{
68 assert(pkt->getSize() == 1);
69 Addr offset = pkt->getAddr() - pioAddr;
70 if (offset < 3) {
71 pit.writeCounter(offset, pkt->get());
71 pit.writeCounter(offset, pkt->getLE<uint8_t>());
72 } else if (offset == 3) {
72 } else if (offset == 3) {
73 pit.writeControl(pkt->get());
73 pit.writeControl(pkt->getLE<uint8_t>());
74 } else {
75 panic("Write to undefined i8254 register.\n");
76 }
77 pkt->makeAtomicResponse();
78 return latency;
79}
80
81void
82X86ISA::I8254::serialize(CheckpointOut &cp) const
83{
84 pit.serialize("pit", cp);
85}
86
87void
88X86ISA::I8254::unserialize(CheckpointIn &cp)
89{
90 pit.unserialize("pit", cp);
91}
92
93void
94X86ISA::I8254::startup()
95{
96 pit.startup();
97}
98
99X86ISA::I8254 *
100I8254Params::create()
101{
102 return new X86ISA::I8254(this);
103}
74 } else {
75 panic("Write to undefined i8254 register.\n");
76 }
77 pkt->makeAtomicResponse();
78 return latency;
79}
80
81void
82X86ISA::I8254::serialize(CheckpointOut &cp) const
83{
84 pit.serialize("pit", cp);
85}
86
87void
88X86ISA::I8254::unserialize(CheckpointIn &cp)
89{
90 pit.unserialize("pit", cp);
91}
92
93void
94X86ISA::I8254::startup()
95{
96 pit.startup();
97}
98
99X86ISA::I8254 *
100I8254Params::create()
101{
102 return new X86ISA::I8254(this);
103}