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 §ion) 101{ 102 UNSERIALIZE_SCALAR(todTime); 103} 104 105DumbTOD * 106DumbTODParams::create() 107{ 108 return new DumbTOD(this); 109} 110