#define REG_A_UIP 0x80
-#define REG_B_SET 0x80
-#define REG_B_PIE 0x40
-#define REG_B_AIE 0x20
-#define REG_B_UIE 0x10
-#define REG_B_DM 0x04
+#define REG_B_SET 0x80
+#define REG_B_PIE 0x40
+#define REG_B_AIE 0x20
+#define REG_B_UIE 0x10
+#define REG_B_SQWE 0x08
+#define REG_B_DM 0x04
struct RTCState {
uint8_t cmos_data[128];
struct tm current_tm;
int base_year;
qemu_irq irq;
+ qemu_irq sqw_irq;
int it_shift;
/* periodic timer */
QEMUTimer *periodic_timer;
{
int period_code, period;
int64_t cur_clock, next_irq_clock;
+ int enable_pie;
period_code = s->cmos_data[RTC_REG_A] & 0x0f;
#if defined TARGET_I386 || defined TARGET_X86_64
/* disable periodic timer if hpet is in legacy mode, since interrupts are
* disabled anyway.
*/
- if (period_code != 0 && (s->cmos_data[RTC_REG_B] & REG_B_PIE) && !hpet_in_legacy_mode()) {
+ enable_pie = hpet_in_legacy_mode();
#else
- if (period_code != 0 && (s->cmos_data[RTC_REG_B] & REG_B_PIE)) {
+ enable_pie = 1;
#endif
+ if (period_code != 0
+ && (((s->cmos_data[RTC_REG_B] & REG_B_PIE) && enable_pie)
+ || ((s->cmos_data[RTC_REG_B] & REG_B_SQWE) && s->sqw_irq))) {
if (period_code <= 2)
period_code += 7;
/* period in 32 Khz cycles */
return;
}
#endif
- s->cmos_data[RTC_REG_C] |= 0xc0;
- rtc_irq_raise(s->irq);
+ if (s->cmos_data[RTC_REG_B] & REG_B_PIE) {
+ s->cmos_data[RTC_REG_C] |= 0xc0;
+ rtc_irq_raise(s->irq);
+ }
+ if (s->cmos_data[RTC_REG_B] & REG_B_SQWE) {
+ /* Not square wave at all but we don't want 2048Hz interrupts!
+ Must be seen as a pulse. */
+ qemu_irq_raise(s->sqw_irq);
+ }
}
static void cmos_ioport_write(void *opaque, uint32_t addr, uint32_t data)
}
#endif
-RTCState *rtc_init(int base, qemu_irq irq, int base_year)
+RTCState *rtc_init_sqw(int base, qemu_irq irq, qemu_irq sqw_irq, int base_year)
{
RTCState *s;
s = qemu_mallocz(sizeof(RTCState));
s->irq = irq;
+ s->sqw_irq = sqw_irq;
s->cmos_data[RTC_REG_A] = 0x26;
s->cmos_data[RTC_REG_B] = 0x02;
s->cmos_data[RTC_REG_C] = 0x00;
return s;
}
+RTCState *rtc_init(int base, qemu_irq irq, int base_year)
+{
+ return rtc_init_sqw(base, irq, NULL, base_year);
+}
+
/* Memory mapped interface */
static uint32_t cmos_mm_readb (void *opaque, target_phys_addr_t addr)
{
typedef struct RTCState RTCState;
RTCState *rtc_init(int base, qemu_irq irq, int base_year);
+RTCState *rtc_init_sqw(int base, qemu_irq irq, qemu_irq sqw_irq, int base_year);
RTCState *rtc_mm_init(target_phys_addr_t base, int it_shift, qemu_irq irq,
int base_year);
void rtc_set_memory(RTCState *s, int addr, int val);