void __init init_IRQ(void)
{
local_irq_disable(); /* PARANOID - should already be disabled */
mtctl(~0UL, 23); /* EIRR : clear all pending external intr */
claim_cpu_irqs();
#ifdef CONFIG_SMP
if (!cpu_eiem)
cpu_eiem = EIEM_MASK(IPI_IRQ) | EIEM_MASK(TIMER_IRQ);
#else
cpu_eiem = EIEM_MASK(TIMER_IRQ);
#endif
set_eiem(cpu_eiem); /* EIEM : enable all external intr */
}
void __init init_IRQ(void)
{
local_irq_disable();
mtctl(~0UL, 23);
claim_cpu_irqs();
#ifdef CONFIG_SMP
if (!cpu_eiem)
cpu_eiem = EIEM_MASK(IPI_IRQ) | EIEM_MASK(TIMER_IRQ);
#else
cpu_eiem = EIEM_MASK(TIMER_IRQ);
#endif
set_eiem(cpu_eiem);
}
static void enable_cpu_irq(void *unused, int irq)
{
unsigned long mask = EIEM_MASK(irq);
mtctl(mask, 23);
SET_EIEM_BIT(irq);
}
static void __cpu_unmask_irq(unsigned int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem |= eirr_bit;
smp_send_all_nop();
}
static inline void disable_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem &= ~eirr_bit;
set_eiem(cpu_eiem);
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
}
static void enable_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
mtctl(eirr_bit, 23); /* clear EIRR bit before unmasking */
cpu_eiem |= eirr_bit;
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
set_eiem(cpu_eiem);
}
static void cpu_disable_irq(unsigned int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem &= ~eirr_bit;
/* Do nothing on the other CPUs. If they get this interrupt,
* The & cpu_eiem in the do_cpu_irq_mask() ensures they won't
* handle it, and the set_eiem() at the bottom will ensure it
* then gets disabled */
}
static void cpu_enable_irq(unsigned int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem |= eirr_bit;
/* This is just a simple NOP IPI. But what it does is cause
* all the other CPUs to do a set_eiem(cpu_eiem) at the end
* of the interrupt handler */
smp_send_all_nop();
}
void cpu_end_irq(unsigned int irq)
{
unsigned long mask = EIEM_MASK(irq);
int cpu = smp_processor_id();
/* set it in the eiems---it's no longer in process */
per_cpu(local_ack_eiem, cpu) |= mask;
/* enable the interrupt */
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
}
void cpu_eoi_irq(struct irq_data *d)
{
unsigned long mask = EIEM_MASK(d->irq);
int cpu = smp_processor_id();
per_cpu(local_ack_eiem, cpu) |= mask;
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
}
static inline void unmask_cpu_irq(void *unused, int irq)
{
unsigned long eirr_bit = EIEM_MASK(irq);
cpu_eiem |= eirr_bit;
/* NOTE: sending an IPI will cause do_cpu_irq_mask() to
** handle *any* unmasked pending interrupts.
** ie We don't need to check for pending interrupts here.
*/
smp_call_function(cpu_set_eiem, (void *) cpu_eiem, 1, 1);
set_eiem(cpu_eiem);
}
void cpu_ack_irq(unsigned int irq)
{
unsigned long mask = EIEM_MASK(irq);
int cpu = smp_processor_id();
/* Clear in EIEM so we can no longer process */
per_cpu(local_ack_eiem, cpu) &= ~mask;
/* disable the interrupt */
set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
/* and now ack it */
mtctl(mask, 23);
}
static void cpu_mask_irq(struct irq_data *d)
{
unsigned long eirr_bit = EIEM_MASK(d->irq);
cpu_eiem &= ~eirr_bit;
}