1/*
2 * Copyright (c) 2004-2005 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;

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35
36#include <string>
37
38#include "base/bitfield.hh"
39#include "base/time.hh"
40#include "base/trace.hh"
41#include "dev/mc146818.hh"
42#include "dev/rtcreg.h"
43#include "sim/sim_object.hh"
44
45using namespace std;
46
47static uint8_t
48bcdize(uint8_t val)
49{
50 uint8_t result;
51 result = val % 10;

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101 stat_regB |= RTCB_BIN;
102
103 setTime(time);
104 DPRINTFN("Real-time clock set to %s", asctime(&time));
105}
106
107MC146818::~MC146818()
108{
109 if (tickEvent.scheduled()) {
110 deschedule(tickEvent);
111 }
112 if (event.scheduled()) {
113 deschedule(event);
114 }
115}
116
117void
118MC146818::writeData(const uint8_t addr, const uint8_t data)
119{
120 if (addr < RTC_STAT_REGA) {
121 clock_data[addr] = data;
122 curTime.tm_sec = unbcdize(sec);

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203{
204 if (stat_regB & RTCB_NO_UPDT)
205 return;
206 time_t calTime = mkutctime(&curTime);
207 calTime++;
208 setTime(*gmtime(&calTime));
209}
210
211unsigned int
212MC146818::drain(Event *de)
213{
214 if (event.scheduled()) {
215 rtcTimerInterruptTickOffset = event.when() - curTick;
216 rtcClockTickOffset = event.when() - curTick;
217 deschedule(event);
218 }
219 if (tickEvent.scheduled()) {
220 deschedule(tickEvent);
221 }
222 return 0;
223}
224
225void
226MC146818::serialize(const string &base, ostream &os)
227{
228 arrayParamOut(os, base + ".clock_data", clock_data, sizeof(clock_data));
229 paramOut(os, base + ".stat_regA", stat_regA);
230 paramOut(os, base + ".stat_regB", stat_regB);
231
232 //
233 // save the timer tick and rtc clock tick values to correctly reschedule
234 // them during unserialize
235 //
236 SERIALIZE_SCALAR(rtcTimerInterruptTickOffset);
237 SERIALIZE_SCALAR(rtcClockTickOffset);
238}
239
240void
241MC146818::unserialize(const string &base, Checkpoint *cp,
242 const string &section)
243{
244 arrayParamIn(cp, section, base + ".clock_data", clock_data,

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