For platforms which boot with device-tree or have correctly chained
all external interrupt controllers, a generic plat_irq_dispatch() can
be used. Implement a plat_irq_dispatch() which simply handles all the
pending interrupts as reported by C0_Cause.
Signed-off-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx>
Reviewed-by: Qais Yousef <qais.yousef@xxxxxxxxxx>
Tested-by: Qais Yousef <qais.yousef@xxxxxxxxxx>
---
Changes from v1:
- handle interrupts in descending order
---
arch/mips/kernel/irq_cpu.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/arch/mips/kernel/irq_cpu.c b/arch/mips/kernel/irq_cpu.c
index ca98a9f..531b11c 100644
--- a/arch/mips/kernel/irq_cpu.c
+++ b/arch/mips/kernel/irq_cpu.c
@@ -94,6 +94,24 @@ static struct irq_chip mips_mt_cpu_irq_controller = {
.irq_eoi = unmask_mips_irq,
};
+asmlinkage void __weak plat_irq_dispatch(void)
+{
+ unsigned long pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ if (!pending) {
+ spurious_interrupt();
+ return;
+ }
+
+ pending >>= CAUSEB_IP;
+ while (pending) {
+ irq = fls(pending) - 1;
+ do_IRQ(MIPS_CPU_IRQ_BASE + irq);
+ pending &= ~BIT(irq);
+ }
+}
+
static int mips_cpu_intc_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
--
2.1.0.rc2.206.gedb03e5
