dtod.cc revision 4870
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 §ion) 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