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Diffstat (limited to 'hw/hpet.c')
-rw-r--r--hw/hpet.c32
1 files changed, 22 insertions, 10 deletions
diff --git a/hw/hpet.c b/hw/hpet.c
index 59a06f633e..f24b227e7e 100644
--- a/hw/hpet.c
+++ b/hw/hpet.c
@@ -159,8 +159,10 @@ static inline uint64_t hpet_calculate_diff(HPETTimer *t, uint64_t current)
}
}
-static void update_irq(struct HPETTimer *timer)
+static void update_irq(struct HPETTimer *timer, int set)
{
+ uint64_t mask;
+ HPETState *s;
int route;
if (timer->tn <= 1 && hpet_in_legacy_mode(timer->state)) {
@@ -172,10 +174,18 @@ static void update_irq(struct HPETTimer *timer)
} else {
route = timer_int_route(timer);
}
- if (!timer_enabled(timer) || !hpet_enabled(timer->state)) {
- return;
+ s = timer->state;
+ mask = 1 << timer->tn;
+ if (!set || !timer_enabled(timer) || !hpet_enabled(timer->state)) {
+ s->isr &= ~mask;
+ qemu_irq_lower(s->irqs[route]);
+ } else if (timer->config & HPET_TN_TYPE_LEVEL) {
+ s->isr |= mask;
+ qemu_irq_raise(s->irqs[route]);
+ } else {
+ s->isr &= ~mask;
+ qemu_irq_pulse(s->irqs[route]);
}
- qemu_irq_pulse(timer->state->irqs[route]);
}
static void hpet_pre_save(void *opaque)
@@ -261,7 +271,7 @@ static void hpet_timer(void *opaque)
t->wrap_flag = 0;
}
}
- update_irq(t);
+ update_irq(t, 1);
}
static void hpet_set_timer(HPETTimer *t)
@@ -291,6 +301,7 @@ static void hpet_set_timer(HPETTimer *t)
static void hpet_del_timer(HPETTimer *t)
{
qemu_del_timer(t->qemu_timer);
+ update_irq(t, 0);
}
#ifdef HPET_DEBUG
@@ -423,10 +434,6 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr,
timer->cmp = (uint32_t)timer->cmp;
timer->period = (uint32_t)timer->period;
}
- if (new_val & HPET_TN_TYPE_LEVEL) {
- printf("qemu: level-triggered hpet not supported\n");
- exit (-1);
- }
if (activating_bit(old_val, new_val, HPET_TN_ENABLE)) {
hpet_set_timer(timer);
} else if (deactivating_bit(old_val, new_val, HPET_TN_ENABLE)) {
@@ -522,7 +529,12 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr,
DPRINTF("qemu: invalid HPET_CFG+4 write \n");
break;
case HPET_STATUS:
- /* FIXME: need to handle level-triggered interrupts */
+ val = new_val & s->isr;
+ for (i = 0; i < HPET_NUM_TIMERS; i++) {
+ if (val & (1 << i)) {
+ update_irq(&s->timer[i], 0);
+ }
+ }
break;
case HPET_COUNTER:
if (hpet_enabled(s)) {