72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/* -*- Mode:C; c-basic-offset:4; tab-width:4 -*- */
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#ifndef _XEN_INTR_H_
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#define _XEN_INTR_H_
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/*
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* The flat IRQ space is divided into two regions:
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* 1. A one-to-one mapping of real physical IRQs. This space is only used
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* if we have physical device-access privilege. This region is at the
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* start of the IRQ space so that existing device drivers do not need
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* to be modified to translate physical IRQ numbers into our IRQ space.
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* 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
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* are bound using the provided bind/unbind functions.
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*
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*
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* $FreeBSD$
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*/
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#define PIRQ_BASE 0
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#define NR_PIRQS 128
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#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
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#define NR_DYNIRQS 128
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#define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
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#define pirq_to_irq(_x) ((_x) + PIRQ_BASE)
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#define irq_to_pirq(_x) ((_x) - PIRQ_BASE)
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#define dynirq_to_irq(_x) ((_x) + DYNIRQ_BASE)
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#define irq_to_dynirq(_x) ((_x) - DYNIRQ_BASE)
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/* Dynamic binding of event channels and VIRQ sources to Linux IRQ space. */
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extern void unbind_from_irq(int irq);
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extern void bind_evtchn_to_cpu(unsigned int chn, unsigned int cpu);
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extern int bind_caller_port_to_irqhandler(unsigned int caller_port,
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const char *devname, driver_intr_t handler, void *arg,
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unsigned long irqflags, void **cookiep);
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extern int bind_listening_port_to_irqhandler(unsigned int remote_domain,
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const char *devname, driver_intr_t handler, void *arg, unsigned long irqflags,
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void **cookiep);
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extern int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu, const char *devname,
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driver_filter_t filter, driver_intr_t handler, unsigned long irqflags);
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extern int bind_ipi_to_irqhandler(unsigned int ipi, unsigned int cpu, const char *devname,
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driver_intr_t handler, unsigned long irqflags);
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extern int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
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unsigned int remote_port,
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const char *devname,
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driver_filter_t filter,
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driver_intr_t handler,
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unsigned long irqflags);
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extern void unbind_from_irqhandler(unsigned int evtchn, void *dev_id);
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static __inline__ int irq_cannonicalize(int irq)
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{
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return (irq == 2) ? 9 : irq;
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}
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extern void disable_irq(unsigned int);
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extern void disable_irq_nosync(unsigned int);
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extern void enable_irq(unsigned int);
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extern void irq_suspend(void);
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extern void irq_resume(void);
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extern void idle_block(void);
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#endif /* _XEN_INTR_H_ */
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