Module interface for interrupt controllers. Might change later.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16269 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/drivers/interrupt_controller.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2006, Ingo Weinhold <[email protected]>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+#ifndef _INTERRUPT_CONTROLLER_H
+#define _INTERRUPT_CONTROLLER_H
+
+#include <device_manager.h>
+
+enum {
+	IRQ_TYPE_LEVEL	= 0,
+	IRQ_TYPE_EDGE	= 1,
+};
+
+typedef struct interrupt_controller_info {
+	int	cpu_count;		// number of supported CPUs
+	int	irq_count;		// number of supported IRQs
+} interrupt_controller_info;
+
+// interrupt controller drivers
+typedef struct interrupt_controller_module_info {
+	driver_module_info info;
+
+	status_t	(*get_controller_info)(void *cookie,
+					interrupt_controller_info *info);
+
+	status_t	(*enable_io_interrupt)(void *cookie, int irq, int type);
+	status_t	(*disable_io_interrupt)(void *cookie, int irq);
+
+	// Returns the IRQ number or a negative value, if the interrupt shall be
+	// ignore (spurious interrupts). Since more than one interrupt can be
+	// pending, the function should be called in a loop until it returns a
+	// negative value.
+	// Must be called with CPU interrupts disabled.
+	int			(*acknowledge_io_interrupt)(void *cookie);
+
+} interrupt_controller_module_info;
+
+#endif	// _INTERRUPT_CONTROLLER_H