xen_intr.h revision 190749 
1/* -*-  Mode:C; c-basic-offset:4; tab-width:4 -*- */
2#ifndef _XEN_INTR_H_
3#define _XEN_INTR_H_
4
5/*
6* The flat IRQ space is divided into two regions:
7*  1. A one-to-one mapping of real physical IRQs. This space is only used
8*     if we have physical device-access privilege. This region is at the
9*     start of the IRQ space so that existing device drivers do not need
10*     to be modified to translate physical IRQ numbers into our IRQ space.
11*  3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
12*     are bound using the provided bind/unbind functions.
13*
14*
15* $FreeBSD: head/sys/xen/xen_intr.h 190749 2009-04-05 21:24:15Z piso $
16*/
17
18#define PIRQ_BASE   0
19#define NR_PIRQS  128
20
21#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
22#define NR_DYNIRQS  128
23
24#define NR_IRQS   (NR_PIRQS + NR_DYNIRQS)
25
26#define pirq_to_irq(_x)   ((_x) + PIRQ_BASE)
27#define irq_to_pirq(_x)   ((_x) - PIRQ_BASE)
28
29#define dynirq_to_irq(_x) ((_x) + DYNIRQ_BASE)
30#define irq_to_dynirq(_x) ((_x) - DYNIRQ_BASE)
31
32/*
33 * Dynamic binding of event channels and VIRQ sources to guest IRQ space.
34 */
35
36/*
37 * Bind a caller port event channel to an interrupt handler. If
38 * successful, the guest IRQ number is returned in *irqp. Return zero
39 * on success or errno otherwise.
40 */
41extern int bind_caller_port_to_irqhandler(unsigned int caller_port,
42	const char *devname, driver_intr_t handler, void *arg,
43	unsigned long irqflags, unsigned int *irqp);
44
45/*
46 * Bind a listening port to an interrupt handler. If successful, the
47 * guest IRQ number is returned in *irqp. Return zero on success or
48 * errno otherwise.
49 */
50extern int bind_listening_port_to_irqhandler(unsigned int remote_domain,
51	const char *devname, driver_intr_t handler, void *arg,
52	unsigned long irqflags, unsigned int *irqp);
53
54/*
55 * Bind a VIRQ to an interrupt handler. If successful, the guest IRQ
56 * number is returned in *irqp. Return zero on success or errno
57 * otherwise.
58 */
59extern int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
60	const char *devname, driver_filter_t filter, driver_intr_t handler,
61	void *arg, unsigned long irqflags,	unsigned int *irqp);
62
63/*
64 * Bind an IPI to an interrupt handler. If successful, the guest
65 * IRQ number is returned in *irqp. Return zero on success or errno
66 * otherwise.
67 */
68extern int bind_ipi_to_irqhandler(unsigned int ipi, unsigned int cpu,
69	const char *devname, driver_filter_t filter,
70	unsigned long irqflags, unsigned int *irqp);
71
72/*
73 * Bind an interdomain event channel to an interrupt handler. If
74 * successful, the guest IRQ number is returned in *irqp. Return zero
75 * on success or errno otherwise.
76 */
77extern int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,
78	unsigned int remote_port, const char *devname,
79	driver_filter_t filter, driver_intr_t handler,
80	unsigned long irqflags, unsigned int *irqp);
81
82/*
83 * Unbind an interrupt handler using the guest IRQ number returned
84 * when it was bound.
85 */
86extern void unbind_from_irqhandler(unsigned int irq);
87
88static __inline__ int irq_cannonicalize(unsigned int irq)
89{
90    return (irq == 2) ? 9 : irq;
91}
92
93extern void disable_irq(unsigned int);
94extern void disable_irq_nosync(unsigned int);
95extern void enable_irq(unsigned int);
96
97extern void irq_suspend(void);
98extern void irq_resume(void);
99
100extern void	idle_block(void);
101extern int	ap_cpu_initclocks(int cpu);
102
103#endif /* _XEN_INTR_H_ */
104