#ifdef TARGET_I386
uint32_t irq_coalesced;
uint32_t period;
+ QEMUTimer *coalesced_timer;
#endif
QEMUTimer *second_timer;
QEMUTimer *second_timer2;
static void rtc_set_time(RTCState *s);
static void rtc_copy_date(RTCState *s);
+#ifdef TARGET_I386
+static void rtc_coalesced_timer_update(RTCState *s)
+{
+ if (s->irq_coalesced == 0) {
+ qemu_del_timer(s->coalesced_timer);
+ } else {
+ /* divide each RTC interval to 2 - 8 smaller intervals */
+ int c = MIN(s->irq_coalesced, 7) + 1;
+ int64_t next_clock = qemu_get_clock(vm_clock) +
+ muldiv64(s->period / c, ticks_per_sec, 32768);
+ qemu_mod_timer(s->coalesced_timer, next_clock);
+ }
+}
+
+static void rtc_coalesced_timer(void *opaque)
+{
+ RTCState *s = opaque;
+
+ if (s->irq_coalesced != 0) {
+ apic_reset_irq_delivered();
+ s->cmos_data[RTC_REG_C] |= 0xc0;
+ rtc_irq_raise(s->irq);
+ if (apic_get_irq_delivered()) {
+ s->irq_coalesced--;
+ }
+ }
+
+ rtc_coalesced_timer_update(s);
+}
+#endif
+
static void rtc_timer_update(RTCState *s, int64_t current_time)
{
int period_code, period;
RTCState *s = opaque;
rtc_timer_update(s, s->next_periodic_time);
-#ifdef TARGET_I386
- if ((s->cmos_data[RTC_REG_C] & 0xc0) && rtc_td_hack) {
- s->irq_coalesced++;
- return;
- }
-#endif
if (s->cmos_data[RTC_REG_B] & REG_B_PIE) {
s->cmos_data[RTC_REG_C] |= 0xc0;
+#ifdef TARGET_I386
+ if(rtc_td_hack) {
+ apic_reset_irq_delivered();
+ rtc_irq_raise(s->irq);
+ if (!apic_get_irq_delivered()) {
+ s->irq_coalesced++;
+ rtc_coalesced_timer_update(s);
+ }
+ } else
+#endif
rtc_irq_raise(s->irq);
}
if (s->cmos_data[RTC_REG_B] & REG_B_SQWE) {
case RTC_REG_C:
ret = s->cmos_data[s->cmos_index];
qemu_irq_lower(s->irq);
-#ifdef TARGET_I386
- if(s->irq_coalesced) {
- apic_reset_irq_delivered();
- qemu_irq_raise(s->irq);
- if (apic_get_irq_delivered())
- s->irq_coalesced--;
- break;
- }
-#endif
s->cmos_data[RTC_REG_C] = 0x00;
break;
default:
s->irq_coalesced = qemu_get_be32(f);
s->period = qemu_get_be32(f);
+ rtc_coalesced_timer_update(s);
return 0;
}
#endif
s->periodic_timer = qemu_new_timer(vm_clock,
rtc_periodic_timer, s);
+#ifdef TARGET_I386
+ if (rtc_td_hack)
+ s->coalesced_timer = qemu_new_timer(vm_clock, rtc_coalesced_timer, s);
+#endif
s->second_timer = qemu_new_timer(vm_clock,
rtc_update_second, s);
s->second_timer2 = qemu_new_timer(vm_clock,