dtod.cc revision 4870:fcc39d001154 
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/trace.hh"
41#include "dev/sparc/dtod.hh"
42#include "dev/platform.hh"
43#include "mem/packet_access.hh"
44#include "mem/port.hh"
45#include "sim/builder.hh"
46#include "sim/system.hh"
47
48using namespace std;
49using namespace TheISA;
50
51DumbTOD::DumbTOD(Params *p)
52    : BasicPioDevice(p)
53{
54    struct tm tm;
55    char *tz;
56
57    pioSize = 0x08;
58
59    parseTime(p->init_time, &tm);
60    tz = getenv("TZ");
61    setenv("TZ", "", 1);
62    tzset();
63    todTime = mktime(&tm);
64    if (tz)
65        setenv("TZ", tz, 1);
66    else
67        unsetenv("TZ");
68    tzset();
69
70    DPRINTFN("Real-time clock set to %s\n", asctime(&tm));
71    DPRINTFN("Real-time clock set to %d\n", todTime);
72}
73
74Tick
75DumbTOD::read(PacketPtr pkt)
76{
77    assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
78    assert(pkt->getSize() == 8);
79
80    pkt->allocate();
81    pkt->set(todTime);
82    todTime += 1000;
83
84    pkt->makeAtomicResponse();
85    return pioDelay;
86}
87
88Tick
89DumbTOD::write(PacketPtr pkt)
90{
91    panic("Dumb tod device doesn't support writes\n");
92}
93
94void
95DumbTOD::serialize(std::ostream &os)
96{
97    SERIALIZE_SCALAR(todTime);
98}
99
100void
101DumbTOD::unserialize(Checkpoint *cp, const std::string &section)
102{
103    UNSERIALIZE_SCALAR(todTime);
104}
105
106
107BEGIN_DECLARE_SIM_OBJECT_PARAMS(DumbTOD)
108
109    Param<Addr> pio_addr;
110    Param<Tick> pio_latency;
111    SimObjectParam<Platform *> platform;
112    SimObjectParam<System *> system;
113    VectorParam<int> time;
114
115END_DECLARE_SIM_OBJECT_PARAMS(DumbTOD)
116
117BEGIN_INIT_SIM_OBJECT_PARAMS(DumbTOD)
118
119    INIT_PARAM(pio_addr, "Device Address"),
120    INIT_PARAM(pio_latency, "Programmed IO latency"),
121    INIT_PARAM(platform, "platform"),
122    INIT_PARAM(system, "system object"),
123    INIT_PARAM(time, "")
124
125END_INIT_SIM_OBJECT_PARAMS(DumbTOD)
126
127CREATE_SIM_OBJECT(DumbTOD)
128{
129    DumbTOD::Params *p = new DumbTOD::Params;
130    p->name =getInstanceName();
131    p->pio_addr = pio_addr;
132    p->pio_delay = pio_latency;
133    p->platform = platform;
134    p->system = system;
135    p->init_time = time;
136    return new DumbTOD(p);
137}
138
139REGISTER_SIM_OBJECT("DumbTOD", DumbTOD)
140