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rtc: fix 12-hour mode

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Hours in 12-hour mode are in the 1-12 range, not 0-11.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2011-11-21 19:00:28 +01:00 committed by Anthony Liguori
parent 024a6fbdb9
commit 3b89eb43b6
1 changed files with 7 additions and 4 deletions
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11
hw/mc146818rtc.c
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@ -296,9 +296,11 @@ static void rtc_set_time(RTCState *s)
tm->tm_sec = rtc_from_bcd(s, s->cmos_data[RTC_SECONDS]);
tm->tm_min = rtc_from_bcd(s, s->cmos_data[RTC_MINUTES]);
tm->tm_hour = rtc_from_bcd(s, s->cmos_data[RTC_HOURS] & 0x7f);
if (!(s->cmos_data[RTC_REG_B] & REG_B_24H) &&
(s->cmos_data[RTC_HOURS] & 0x80)) {
tm->tm_hour += 12;
if (!(s->cmos_data[RTC_REG_B] & REG_B_24H)) {
tm->tm_hour %= 12;
if (s->cmos_data[RTC_HOURS] & 0x80) {
tm->tm_hour += 12;
}
}
tm->tm_wday = rtc_from_bcd(s, s->cmos_data[RTC_DAY_OF_WEEK]) - 1;
tm->tm_mday = rtc_from_bcd(s, s->cmos_data[RTC_DAY_OF_MONTH]);
@ -320,7 +322,8 @@ static void rtc_copy_date(RTCState *s)
s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, tm->tm_hour);
} else {
/* 12 hour format */
s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, tm->tm_hour % 12);
int h = (tm->tm_hour % 12) ? tm->tm_hour % 12 : 12;
s->cmos_data[RTC_HOURS] = rtc_to_bcd(s, h);
if (tm->tm_hour >= 12)
s->cmos_data[RTC_HOURS] |= 0x80;
}