dtod.cc revision 4918:3214e3694fb2 
1/*
2 * Copyright (c) 2004-2006 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 */
30
31/** @file
32 * Time of date device implementation
33 */
34#include <sys/time.h>
35
36#include <deque>
37#include <string>
38#include <vector>
39
40#include "base/time.hh"
41#include "base/trace.hh"
42#include "dev/sparc/dtod.hh"
43#include "dev/platform.hh"
44#include "mem/packet_access.hh"
45#include "mem/port.hh"
46#include "sim/system.hh"
47
48using namespace std;
49using namespace TheISA;
50
51DumbTOD::DumbTOD(const Params *p)
52    : BasicPioDevice(p)
53{
54    struct tm tm = p->time;
55    char *tz;
56
57    pioSize = 0x08;
58
59    tz = getenv("TZ");
60    setenv("TZ", "", 1);
61    tzset();
62    todTime = mktime(&tm);
63    if (tz)
64        setenv("TZ", tz, 1);
65    else
66        unsetenv("TZ");
67    tzset();
68
69    DPRINTFN("Real-time clock set to %s\n", asctime(&tm));
70    DPRINTFN("Real-time clock set to %d\n", todTime);
71}
72
73Tick
74DumbTOD::read(PacketPtr pkt)
75{
76    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
77    assert(pkt->getSize() == 8);
78
79    pkt->allocate();
80    pkt->set(todTime);
81    todTime += 1000;
82
83    pkt->makeAtomicResponse();
84    return pioDelay;
85}
86
87Tick
88DumbTOD::write(PacketPtr pkt)
89{
90    panic("Dumb tod device doesn't support writes\n");
91}
92
93void
94DumbTOD::serialize(std::ostream &os)
95{
96    SERIALIZE_SCALAR(todTime);
97}
98
99void
100DumbTOD::unserialize(Checkpoint *cp, const std::string &section)
101{
102    UNSERIALIZE_SCALAR(todTime);
103}
104
105DumbTOD *
106DumbTODParams::create()
107{
108    return new DumbTOD(this);
109}
110