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Add rtc reset function.

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On reset:
Periodic Interrupt Enable (PIE) bit is cleared to zero
Alarm Interrupt Enable (AIE) bit is cleared to zero
Update ended Interrupt Flag (UF) bit is cleared to zero
Interrupt Request status Flag (IRQF) bit is cleared to zero
Periodic Interrupt Flag (PF) bit is cleared to zero
Alarm Interrupt Flag (AF) bit is cleared to zero
Square Wave output Enable (SQWE) zero

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gleb Natapov 2009-06-08 15:56:04 +03:00 committed by Anthony Liguori
parent e19252d32c
commit eeb7c03c0f
1 changed files with 19 additions and 0 deletions
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19
hw/mc146818rtc.c
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@ -568,6 +568,22 @@ static int rtc_load_td(QEMUFile *f, void *opaque, int version_id)
}
#endif
static void rtc_reset(void *opaque)
{
RTCState *s = opaque;
/* clear PIE,AIE,SQWE on reset */
s->cmos_data[RTC_REG_B] &= ~((1<<6) | (1<<5) | (1<<3));
/* clear UF,IRQF,PF,AF on reset */
s->cmos_data[RTC_REG_C] &= ~((1<<4) | (1<<7) | (1<<6) | (1<<5));
#ifdef TARGET_I386
if (rtc_td_hack)
s->irq_coalesced = 0;
#endif
}
RTCState *rtc_init_sqw(int base, qemu_irq irq, qemu_irq sqw_irq, int base_year)
{
RTCState *s;
@ -606,6 +622,8 @@ RTCState *rtc_init_sqw(int base, qemu_irq irq, qemu_irq sqw_irq, int base_year)
if (rtc_td_hack)
register_savevm("mc146818rtc-td", base, 1, rtc_save_td, rtc_load_td, s);
#endif
qemu_register_reset(rtc_reset, 0, s);
return s;
}
@ -721,5 +739,6 @@ RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq,
if (rtc_td_hack)
register_savevm("mc146818rtc-td", base, 1, rtc_save_td, rtc_load_td, s);
#endif
qemu_register_reset(rtc_reset, 0, s);
return s;
}