diff options
Diffstat (limited to 'hw/mc146818rtc.c')
| -rw-r--r-- | hw/mc146818rtc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c index 9d4cbed..bad4cbd 100644 --- a/hw/mc146818rtc.c +++ b/hw/mc146818rtc.c @@ -380,6 +380,29 @@ void rtc_set_date(RTCState *s, const struct tm *tm) rtc_copy_date(s); } +/* PC cmos mappings */ +#define REG_IBM_CENTURY_BYTE 0x32 +#define REG_IBM_PS2_CENTURY_BYTE 0x37 + +void rtc_set_date_from_host(RTCState *s) +{ + time_t ti; + struct tm *tm; + int val; + + /* set the CMOS date */ + time(&ti); + if (rtc_utc) + tm = gmtime(&ti); + else + tm = localtime(&ti); + rtc_set_date(s, tm); + + val = to_bcd(s, (tm->tm_year / 100) + 19); + rtc_set_memory(s, REG_IBM_CENTURY_BYTE, val); + rtc_set_memory(s, REG_IBM_PS2_CENTURY_BYTE, val); +} + static void rtc_save(QEMUFile *f, void *opaque) { RTCState *s = opaque; @@ -444,6 +467,8 @@ RTCState *rtc_init(int base, int irq) s->cmos_data[RTC_REG_C] = 0x00; s->cmos_data[RTC_REG_D] = 0x80; + rtc_set_date_from_host(s); + s->periodic_timer = qemu_new_timer(vm_clock, rtc_periodic_timer, s); s->second_timer = qemu_new_timer(vm_clock, |