Initial commit.
diff --git a/inc/irq.h b/inc/irq.h
new file mode 100644
index 0000000..af5faba
--- /dev/null
+++ b/inc/irq.h
@@ -0,0 +1,32 @@
+#ifndef _IRQ_H
+#define _IRQ_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct irq_handle;
+
+enum irq_trigger {
+ irq_trigger_level,
+ irq_trigger_edge,
+};
+
+enum irq_polarity {
+ irq_polarity_active_high,
+ irq_polarity_active_low,
+};
+
+/* TODO: Add target CPUs here. */
+void irq_config(uint32_t num, enum irq_trigger t, enum irq_polarity p,
+ bool (*cb)(void *, struct irq_handle *), void *context);
+void irq_enable(uint32_t num);
+
+void irq_dismiss(struct irq_handle *h);
+
+/* TODO: These don't really belong here, do they?. */
+bool irq_handle(uint32_t num, struct irq_handle *h);
+void irq_init(void);
+void irq_init_percpu(void);
+
+#endif