1 files changed, 27 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-dreamcast/irq.c b/arch/sh/boards/mach-dreamcast/irq.c
index f55fc8e795e9..d932667410ab 100644
--- a/arch/sh/boards/mach-dreamcast/irq.c
+++ b/arch/sh/boards/mach-dreamcast/irq.c
@@ -135,3 +135,30 @@ int systemasic_irq_demux(int irq)
         /* Not reached */
         return irq;
 }
+
+void systemasic_irq_init(void)
+{
+        int i, nid = cpu_to_node(boot_cpu_data);
+
+        /* Assign all virtual IRQs to the System ASIC int. handler */
+        for (i = HW_EVENT_IRQ_BASE; i < HW_EVENT_IRQ_MAX; i++) {
+                unsigned int irq;
+
+                irq = create_irq_nr(i, nid);
+                if (unlikely(irq == 0)) {
+                        pr_err("%s: failed hooking irq %d for systemasic\n",
+                               __func__, i);
+                        return;
+                }
+
+                if (unlikely(irq != i)) {
+                        pr_err("%s: got irq %d but wanted %d, bailing.\n",
+                               __func__, irq, i);
+                        destroy_irq(irq);
+                        return;
+                }
+
+                set_irq_chip_and_handler(i, &systemasic_int,
+                                         handle_level_irq);
+        }
+}