Squash commits for public release

kernel/include/drivers/irq/irq_api.h

@@ -0,0 +1,35 @@
+#ifndef _KERNEL_DRIVERS_IRQ_IRQ_API_H
+#define _KERNEL_DRIVERS_IRQ_IRQ_API_H
+
+#include <libkern/types.h>
+
+// This value shows the maximum number of irqs OS supports. It is irqdev independent,
+// thus irqdev implementations should double check the irqlines.
+#define IRQ_HANDLERS_MAX 256
+
+#define ALL_CPU_MASK 0xff
+#define BOOT_CPU_MASK 0x01
+
+typedef int irq_flags_t;
+typedef int irq_line_t;
+typedef uint8_t irq_priority_t;
+typedef void (*irq_handler_t)(irq_line_t line);
+
+// Currently flags maps to devtree irq_flags.
+// Later we might need to enhance irq_flags_from_devtree() to use as translator.
+#define IRQ_FLAG_EDGE_TRIGGERED (1 << 0)
+
+struct irqdev_descritptor {
+    uint32_t (*interrupt_descriptor)();
+    void (*end_interrupt)(uint32_t int_desc);
+    void (*enable_irq)(irq_line_t line, irq_priority_t prior, irq_flags_t type, int cpu_mask);
+};
+typedef struct irqdev_descritptor irqdev_descritptor_t;
+
+static inline irq_flags_t irq_flags_from_devtree(uint32_t devtree_irq_flags) { return (irq_flags_t)devtree_irq_flags; }
+
+void irq_register_handler(irq_line_t line, irq_priority_t prior, irq_flags_t flags, irq_handler_t func, int cpu_mask);
+void irq_set_dev(irqdev_descritptor_t irqdev_desc);
+irq_line_t irqline_from_id(int id);
+
+#endif