/*
* Setup the local event timer for @cpu
*/
void arc_local_timer_setup(unsigned int cpu)
{
struct clock_event_device *clk = &per_cpu(arc_clockevent_device, cpu);
clk->cpumask = cpumask_of(cpu);
clockevents_config_and_register(clk, arc_get_core_freq(),
0, ARC_TIMER_MAX);
/*
* setup the per-cpu timer IRQ handler - for all cpus
* For non boot CPU explicitly unmask at intc
* setup_irq() -> .. -> irq_startup() already does this on boot-cpu
*/
if (!cpu)
setup_irq(TIMER0_IRQ, &arc_timer_irq);
else
arch_unmask_irq(TIMER0_IRQ);
}
/*
* Setup the local event timer for @cpu
* N.B. weak so that some exotic ARC SoCs can completely override it
*/
void __attribute__((weak)) __cpuinit arc_local_timer_setup(unsigned int cpu)
{
struct clock_event_device *clk = &per_cpu(arc_clockevent_device, cpu);
clockevents_calc_mult_shift(clk, arc_get_core_freq(), 5);
clk->max_delta_ns = clockevent_delta2ns(ARC_TIMER_MAX, clk);
clk->cpumask = cpumask_of(cpu);
clockevents_register_device(clk);
/*
* setup the per-cpu timer IRQ handler - for all cpus
* For non boot CPU explicitly unmask at intc
* setup_irq() -> .. -> irq_startup() already does this on boot-cpu
*/
if (!cpu)
setup_irq(TIMER0_IRQ, &arc_timer_irq);
else
arch_unmask_irq(TIMER0_IRQ);
}
static void arc_unmask_irq(struct irq_data *data)
{
arch_unmask_irq(data->irq);
}
