malta_io.cc revision 8739:925f15f96322 
1/*
2 * Copyright (c) 2004-2005 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: Ali Saidi
29 *          Andrew Schultz
30 *          Miguel Serrano
31 */
32
33/** @file
34 * Malta I/O including PIC, PIT, RTC, DMA
35 */
36
37#include <sys/time.h>
38
39#include <deque>
40#include <string>
41#include <vector>
42
43#include "base/time.hh"
44#include "base/trace.hh"
45#include "config/the_isa.hh"
46#include "debug/Malta.hh"
47#include "dev/mips/malta.hh"
48#include "dev/mips/malta_cchip.hh"
49#include "dev/mips/malta_io.hh"
50#include "dev/mips/maltareg.h"
51#include "dev/rtcreg.h"
52#include "mem/packet.hh"
53#include "mem/packet_access.hh"
54#include "mem/port.hh"
55#include "params/MaltaIO.hh"
56#include "sim/system.hh"
57
58using namespace std;
59using namespace TheISA;
60
61MaltaIO::RTC::RTC(const string &name, const MaltaIOParams *p)
62    : MC146818(p->malta, name, p->time, p->year_is_bcd, p->frequency),
63      malta(p->malta)
64{
65}
66
67MaltaIO::MaltaIO(const Params *p)
68    : BasicPioDevice(p), malta(p->malta),
69      pitimer(this, p->name + "pitimer"), rtc(p->name + ".rtc", p)
70{
71    pioSize = 0x100;
72
73    // set the back pointer from malta to myself
74    malta->io = this;
75
76    timerData = 0;
77    picr = 0;
78    picInterrupting = false;
79}
80
81Tick
82MaltaIO::frequency() const
83{
84    return SimClock::Frequency / params()->frequency;
85}
86
87Tick
88MaltaIO::read(PacketPtr pkt)
89{
90    panic("MaltaIO::read(...) not implemented inside malta_io.cc");
91    return pioDelay;
92}
93
94Tick
95MaltaIO::write(PacketPtr pkt)
96{
97    panic("MaltaIO::write(...) not implemented inside malta_io.cc");
98    return pioDelay;
99}
100
101void
102MaltaIO::postIntr(uint8_t interrupt)
103{
104    malta->cchip->postIntr(interrupt);
105    DPRINTF(Malta, "posting pic interrupt to cchip\n");
106}
107
108void
109MaltaIO::clearIntr(uint8_t interrupt)
110{
111    malta->cchip->clearIntr(interrupt);
112    DPRINTF(Malta, "clear pic interrupt to cchip\n");
113}
114
115void
116MaltaIO::serialize(ostream &os)
117{
118    SERIALIZE_SCALAR(timerData);
119    SERIALIZE_SCALAR(mask1);
120    SERIALIZE_SCALAR(mask2);
121    SERIALIZE_SCALAR(mode1);
122    SERIALIZE_SCALAR(mode2);
123    SERIALIZE_SCALAR(picr);
124    SERIALIZE_SCALAR(picInterrupting);
125
126    // Serialize the timers
127    pitimer.serialize("pitimer", os);
128    rtc.serialize("rtc", os);
129}
130
131void
132MaltaIO::unserialize(Checkpoint *cp, const string &section)
133{
134    UNSERIALIZE_SCALAR(timerData);
135    UNSERIALIZE_SCALAR(mask1);
136    UNSERIALIZE_SCALAR(mask2);
137    UNSERIALIZE_SCALAR(mode1);
138    UNSERIALIZE_SCALAR(mode2);
139    UNSERIALIZE_SCALAR(picr);
140    UNSERIALIZE_SCALAR(picInterrupting);
141
142    // Unserialize the timers
143    pitimer.unserialize("pitimer", cp, section);
144    rtc.unserialize("rtc", cp, section);
145}
146
147MaltaIO *
148MaltaIOParams::create()
149{
150    return new MaltaIO(this);
151}
152