dtod.cc revision 9808:13ffc0066b76 
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 "config/the_isa.hh"
43#include "dev/sparc/dtod.hh"
44#include "dev/platform.hh"
45#include "mem/packet_access.hh"
46#include "mem/port.hh"
47#include "sim/system.hh"
48
49using namespace std;
50using namespace TheISA;
51
52DumbTOD::DumbTOD(const Params *p)
53    : BasicPioDevice(p, 0x08)
54{
55    struct tm tm = p->time;
56    char *tz;
57
58    tz = getenv("TZ");
59    setenv("TZ", "", 1);
60    tzset();
61    todTime = mktime(&tm);
62    if (tz)
63        setenv("TZ", tz, 1);
64    else
65        unsetenv("TZ");
66    tzset();
67
68    DPRINTFN("Real-time clock set to %s\n", asctime(&tm));
69    DPRINTFN("Real-time clock set to %d\n", todTime);
70}
71
72Tick
73DumbTOD::read(PacketPtr pkt)
74{
75    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
76    assert(pkt->getSize() == 8);
77
78    pkt->allocate();
79    pkt->set(todTime);
80    todTime += 1000;
81
82    pkt->makeAtomicResponse();
83    return pioDelay;
84}
85
86Tick
87DumbTOD::write(PacketPtr pkt)
88{
89    panic("Dumb tod device doesn't support writes\n");
90}
91
92void
93DumbTOD::serialize(std::ostream &os)
94{
95    SERIALIZE_SCALAR(todTime);
96}
97
98void
99DumbTOD::unserialize(Checkpoint *cp, const std::string &section)
100{
101    UNSERIALIZE_SCALAR(todTime);
102}
103
104DumbTOD *
105DumbTODParams::create()
106{
107    return new DumbTOD(this);
108}
109