src/dev/sparc/dtod.cc

   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
  48 using namespace std;
  49 using namespace TheISA;
  50
  51 DumbTOD::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
  74 Tick
  75 DumbTOD::read(PacketPtr pkt)
  76 {
  77     assert(pkt->result == Packet::Unknown);
  78     assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize);
  79     assert(pkt->getSize() == 8);
  80
  81     pkt->allocate();
  82     pkt->set(todTime);
  83     todTime += 1000;
  84
  85     pkt->result = Packet::Success;
  86     return pioDelay;
  87 }
  88
  89 Tick
  90 DumbTOD::write(PacketPtr pkt)
  91 {
  92     panic("Dumb tod device doesn't support writes\n");
  93 }
  94
  95 void
  96 DumbTOD::serialize(std::ostream &os)
  97 {
  98     SERIALIZE_SCALAR(todTime);
  99 }
 100
 101 void
 102 DumbTOD::unserialize(Checkpoint *cp, const std::string &section)
 103 {
 104     UNSERIALIZE_SCALAR(todTime);
 105 }
 106
 107
 108 BEGIN_DECLARE_SIM_OBJECT_PARAMS(DumbTOD)
 109
 110     Param<Addr> pio_addr;
 111     Param<Tick> pio_latency;
 112     SimObjectParam<Platform *> platform;
 113     SimObjectParam<System *> system;
 114     VectorParam<int> time;
 115
 116 END_DECLARE_SIM_OBJECT_PARAMS(DumbTOD)
 117
 118 BEGIN_INIT_SIM_OBJECT_PARAMS(DumbTOD)
 119
 120     INIT_PARAM(pio_addr, "Device Address"),
 121     INIT_PARAM(pio_latency, "Programmed IO latency"),
 122     INIT_PARAM(platform, "platform"),
 123     INIT_PARAM(system, "system object"),
 124     INIT_PARAM(time, "")
 125
 126 END_INIT_SIM_OBJECT_PARAMS(DumbTOD)
 127
 128 CREATE_SIM_OBJECT(DumbTOD)
 129 {
 130     DumbTOD::Params *p = new DumbTOD::Params;
 131     p->name =getInstanceName();
 132     p->pio_addr = pio_addr;
 133     p->pio_delay = pio_latency;
 134     p->platform = platform;
 135     p->system = system;
 136     p->init_time = time;
 137     return new DumbTOD(p);
 138 }
 139
 140 REGISTER_SIM_OBJECT("DumbTOD", DumbTOD)