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pxa2xx_timer: separate irq for pxa27x handling 

First, sysbus_init_irq shan't be called on on-stack variables. Indeed,
it only stores a passed pointer in qdev and the stored irq is later
populated, so we get a nice write-to-stack bug.
Second, irq for pxa27x should probably be handled in a more gentler way,
as we should check if we have events to raise this irq.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
This commit is contained in:
Dmitry Eremin-Solenikov 2011-03-04 03:40:59 +03:00 committed by Andrzej Zaborowski
parent 07bf23a771
commit 4ff927cc62
1 changed files with 5 additions and 4 deletions
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9
hw/pxa2xx_timer.c
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@ -94,6 +94,7 @@ struct PXA2xxTimerInfo {
uint32_t reset3;
uint32_t snapshot;
qemu_irq irq4;
PXA2xxTimer4 tm4[8];
};
@ -289,7 +290,7 @@ static void pxa2xx_timer_write(void *opaque, target_phys_addr_t offset,
if (s->tm4[i].tm.level && (value & 1))
s->tm4[i].tm.level = 0;
if (!(s->events & 0xff0))
qemu_irq_lower(s->tm4->tm.irq);
qemu_irq_lower(s->irq4);
}
break;
case OWER: /* XXX: Reset on OSMR3 match? */
@ -372,6 +373,8 @@ static void pxa2xx_timer_tick4(void *opaque)
t->clock = 0;
if (t->control & (1 << 6))
pxa2xx_timer_update4(i, qemu_get_clock(vm_clock), t->tm.num - 4);
if (i->events & 0xff0)
qemu_irq_raise(i->irq4);
}
static int pxa25x_timer_post_load(void *opaque, int version_id)
@ -395,7 +398,6 @@ static int pxa2xx_timer_init(SysBusDevice *dev)
int i;
int iomemtype;
PXA2xxTimerInfo *s;
qemu_irq irq4;
s = FROM_SYSBUS(PXA2xxTimerInfo, dev);
s->irq_enabled = 0;
@ -414,7 +416,7 @@ static int pxa2xx_timer_init(SysBusDevice *dev)
pxa2xx_timer_tick, &s->timer[i]);
}
if (s->flags & (1 << PXA2XX_TIMER_HAVE_TM4)) {
sysbus_init_irq(dev, &irq4);
sysbus_init_irq(dev, &s->irq4);
for (i = 0; i < 8; i ++) {
s->tm4[i].tm.value = 0;
@ -425,7 +427,6 @@ static int pxa2xx_timer_init(SysBusDevice *dev)
s->tm4[i].control = 0x0;
s->tm4[i].tm.qtimer = qemu_new_timer(vm_clock,
pxa2xx_timer_tick4, &s->tm4[i]);
s->tm4[i].tm.irq = irq4;
}
}