blob: 668195e9ca400662c35a028e361a91ba9eb7c87c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H
/*
* linux/include/asm/irq.h
*
* (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
*
* IRQ/IPI changes taken from work by Thomas Radke
* <tomsoft@informatik.tu-chemnitz.de>
*/
#include <linux/config.h>
#include <asm/hypervisor.h>
#include <asm/ptrace.h>
/*
* The flat IRQ space is divided into two regions:
* 1. A one-to-one mapping of real physical IRQs. This space is only used
* if we have physical device-access privilege. This region is at the
* start of the IRQ space so that existing device drivers do not need
* to be modified to translate physical IRQ numbers into our IRQ space.
* 3. A dynamic mapping of inter-domain and Xen-sourced virtual IRQs. These
* are bound using the provided bind/unbind functions.
*/
#define PIRQ_BASE 0
#define NR_PIRQS 128
#define DYNIRQ_BASE (PIRQ_BASE + NR_PIRQS)
#define NR_DYNIRQS 128
#define NR_IRQS (NR_PIRQS + NR_DYNIRQS)
#define pirq_to_irq(_x) ((_x) + PIRQ_BASE)
#define irq_to_pirq(_x) ((_x) - PIRQ_BASE)
#define dynirq_to_irq(_x) ((_x) + DYNIRQ_BASE)
#define irq_to_dynirq(_x) ((_x) - DYNIRQ_BASE)
/* Dynamic binding of event channels and VIRQ sources to Linux IRQ space. */
extern int bind_virq_to_irq(int virq);
extern void unbind_virq_from_irq(int virq);
extern int bind_evtchn_to_irq(int evtchn);
extern void unbind_evtchn_from_irq(int evtchn);
static __inline__ int irq_cannonicalize(int irq)
{
return (irq == 2) ? 9 : irq;
}
extern void disable_irq(unsigned int);
extern void disable_irq_nosync(unsigned int);
extern void enable_irq(unsigned int);
extern void irq_suspend(void);
extern void irq_resume(void);
#endif /* _ASM_IRQ_H */
|
