/*
* Broadcast handler for MT7621 VPE0, VPE1, VPE2 and VPE3 dummy clockevent device.
* This function is registered in arch/mips/kernel/cevt-r4k.c.
*
* The function is in timer irq context.
*/
void ra_systick_event_broadcast(const struct cpumask *mask)
{
u32 reg;
int i;
unsigned long flags;
/*
* Mailbox design.
*
* The IPI VPE sender writes the signal bit to RALINK_TESTSTAT register.
* So the receiver VPEs can judge "ipi_call" or "broadcast" event by
* RALINK_TESTSTAT register when receiving ipi_call interrupt.
*
* Using spin_lock() to prevent other VPEs from accessing RALINK_TESTSTAT
* register at the same time.
*/
spin_lock_irqsave(&ra_teststat_lock, flags);
reg = (*((volatile u32 *)(RALINK_TESTSTAT)));
for_each_cpu(i, mask)
reg |= ((0x1UL) << i);
(*((volatile u32 *)(RALINK_TESTSTAT))) = reg;
spin_unlock_irqrestore(&ra_teststat_lock, flags);
#ifdef CONFIG_MIPS_MT_SMP
/* send IPI to other VPEs, using "ipi_call" GIC(60~63), MIPS int#2 */
for_each_cpu(i, mask)
gic_send_ipi(plat_ipi_call_int_xlate(i));
#endif
}
void gic_send_ipi_single(int cpu, unsigned int action)
{
unsigned long flags;
unsigned int intr;
pr_debug("CPU%d: %s cpu %d action %u status %08x\n",
smp_processor_id(), __func__, cpu, action, read_c0_status());
local_irq_save(flags);
switch (action) {
case SMP_CALL_FUNCTION:
intr = plat_ipi_call_int_xlate(cpu);
break;
case SMP_RESCHEDULE_YOURSELF:
intr = plat_ipi_resched_int_xlate(cpu);
break;
default:
BUG();
}
gic_send_ipi(intr);
local_irq_restore(flags);
}
