/* A write (of any value) to this register disables the timer. */
static void ib700_write_disable_reg(void *vp, uint32_t addr, uint32_t data)
{
IB700State *s = vp;
ib700_debug("addr = %x, data = %x\n", addr, data);
qemu_del_timer(s->timer);
}
static void wdt_ib700_reset(DeviceState *dev)
{
IB700State *s = IB700(dev);
ib700_debug("watchdog reset\n");
qemu_del_timer(s->timer);
}
static void wdt_ib700_reset(DeviceState *dev)
{
IB700State *s = DO_UPCAST(IB700State, dev.qdev, dev);
ib700_debug("watchdog reset\n");
qemu_del_timer(s->timer);
}
/* This is called when the watchdog expires. */
static void ib700_timer_expired(void *vp)
{
IB700State *s = vp;
ib700_debug("watchdog expired\n");
watchdog_perform_action();
qemu_del_timer(s->timer);
}
static void wdt_ib700_realize(DeviceState *dev, Error **errp)
{
IB700State *s = IB700(dev);
PortioList *port_list = g_new(PortioList, 1);
ib700_debug("watchdog init\n");
s->timer = qemu_new_timer_ns(vm_clock, ib700_timer_expired, s);
portio_list_init(port_list, OBJECT(s), wdt_portio_list, s, "ib700");
portio_list_add(port_list, isa_address_space_io(&s->parent_obj), 0);
}
static int wdt_ib700_init(ISADevice *dev)
{
IB700State *s = IB700(dev);
ib700_debug("watchdog init\n");
s->timer = qemu_new_timer_ns(vm_clock, ib700_timer_expired, s);
register_ioport_write(0x441, 2, 1, ib700_write_disable_reg, s);
register_ioport_write(0x443, 2, 1, ib700_write_enable_reg, s);
return 0;
}
/* A write to this register enables the timer. */
static void ib700_write_enable_reg(void *vp, uint32_t addr, uint32_t data)
{
IB700State *s = vp;
static int time_map[] = {
30, 28, 26, 24, 22, 20, 18, 16,
14, 12, 10, 8, 6, 4, 2, 0
};
int64_t timeout;
ib700_debug("addr = %x, data = %x\n", addr, data);
timeout = (int64_t) time_map[data & 0xF] * get_ticks_per_sec();
qemu_mod_timer(s->timer, qemu_get_clock_ns (vm_clock) + timeout);
}