+/*
+ * Built-in IRQ handlers for various IRQ types,
+ * callable via desc->chip->handle_irq()
+ */
+extern void fastcall
+handle_level_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
+extern void fastcall
+handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_edge_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
+extern void fastcall
+handle_simple_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_percpu_irq(unsigned int irq, struct irq_desc *desc,
+ struct pt_regs *regs);
+extern void fastcall
+handle_bad_irq(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs);
+
+/*
+ * Get a descriptive string for the highlevel handler, for
+ * /proc/interrupts output:
+ */
+extern const char *
+handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *));
+
+/*
+ * Monolithic do_IRQ implementation.
+ * (is an explicit fastcall, because i386 4KSTACKS calls it from assembly)
+ */
+extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+
+/*
+ * Architectures call this to let the generic IRQ layer
+ * handle an interrupt. If the descriptor is attached to an
+ * irqchip-style controller then we call the ->handle_irq() handler,
+ * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
+ */
+static inline void generic_handle_irq(unsigned int irq, struct pt_regs *regs)
+{
+ struct irq_desc *desc = irq_desc + irq;
+
+ if (likely(desc->handle_irq))
+ desc->handle_irq(irq, desc, regs);
+ else
+ __do_IRQ(irq, regs);
+}
+
+/* Handling of unhandled and spurious interrupts: */
+extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
+ int action_ret, struct pt_regs *regs);
+
+/* Resending of interrupts :*/
+void check_irq_resend(struct irq_desc *desc, unsigned int irq);
+
+/* Initialize /proc/irq/ */
+extern void init_irq_proc(void);
+
+/* Enable/disable irq debugging output: */
+extern int noirqdebug_setup(char *str);
+
+/* Checks whether the interrupt can be requested by request_irq(): */
+extern int can_request_irq(unsigned int irq, unsigned long irqflags);
+
+/* Dummy irq-chip implementations: */
+extern struct irq_chip no_irq_chip;
+extern struct irq_chip dummy_irq_chip;
+
+extern void
+set_irq_chip_and_handler(unsigned int irq, struct irq_chip *chip,
+ void fastcall (*handle)(unsigned int,
+ struct irq_desc *,
+ struct pt_regs *));
+extern void
+__set_irq_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *),
+ int is_chained);
+
+/*
+ * Set a highlevel flow handler for a given IRQ:
+ */
+static inline void
+set_irq_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *))
+{
+ __set_irq_handler(irq, handle, 0);
+}
+
+/*
+ * Set a highlevel chained flow handler for a given IRQ.
+ * (a chained handler is automatically enabled and set to
+ * IRQ_NOREQUEST and IRQ_NOPROBE)
+ */
+static inline void
+set_irq_chained_handler(unsigned int irq,
+ void fastcall (*handle)(unsigned int, struct irq_desc *,
+ struct pt_regs *))
+{
+ __set_irq_handler(irq, handle, 1);
+}
+
+/* Set/get chip/data for an IRQ: */
+
+extern int set_irq_chip(unsigned int irq, struct irq_chip *chip);
+extern int set_irq_data(unsigned int irq, void *data);
+extern int set_irq_chip_data(unsigned int irq, void *data);
+extern int set_irq_type(unsigned int irq, unsigned int type);
+
+#define get_irq_chip(irq) (irq_desc[irq].chip)
+#define get_irq_chip_data(irq) (irq_desc[irq].chip_data)
+#define get_irq_data(irq) (irq_desc[irq].handler_data)
+
+#endif /* CONFIG_GENERIC_HARDIRQS */
+
+#endif /* !CONFIG_S390 */