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-rw-r--r--arch/arc/kernel/irq.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/arc/kernel/irq.c b/arch/arc/kernel/irq.c
new file mode 100644
index 000000000..ef909dd4b
--- /dev/null
+++ b/arch/arc/kernel/irq.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2011-12 Synopsys, Inc. (www.synopsys.com)
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqchip.h>
+#include <asm/mach_desc.h>
+#include <asm/smp.h>
+
+/*
+ * Late Interrupt system init called from start_kernel for Boot CPU only
+ *
+ * Since slab must already be initialized, platforms can start doing any
+ * needed request_irq( )s
+ */
+void __init init_IRQ(void)
+{
+ /*
+ * process the entire interrupt tree in one go
+ * Any external intc will be setup provided DT chains them
+ * properly
+ */
+ irqchip_init();
+
+#ifdef CONFIG_SMP
+ /* a SMP H/w block could do IPI IRQ request here */
+ if (plat_smp_ops.init_per_cpu)
+ plat_smp_ops.init_per_cpu(smp_processor_id());
+#endif
+
+ if (machine_desc->init_per_cpu)
+ machine_desc->init_per_cpu(smp_processor_id());
+}
+
+/*
+ * "C" Entry point for any ARC ISR, called from low level vector handler
+ * @irq is the vector number read from ICAUSE reg of on-chip intc
+ */
+void arch_do_IRQ(unsigned int hwirq, struct pt_regs *regs)
+{
+ handle_domain_irq(NULL, hwirq, regs);
+}