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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_IRQ_H
2#define _ASM_IRQ_H
3
4/*
5 * linux/include/asm/irq.h
6 *
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
8 *
9 * IRQ/IPI changes taken from work by Thomas Radke
10 * <tomsoft@informatik.tu-chemnitz.de>
11 */
12
13#define TIMER_IRQ 0
14
15/*
16 * 16 8259A IRQ's, 208 potential APIC interrupt sources.
17 * Right now the APIC is mostly only used for SMP.
18 * 256 vectors is an architectural limit. (we can have
19 * more than 256 devices theoretically, but they will
20 * have to use shared interrupts)
21 * Since vectors 0x00-0x1f are used/reserved for the CPU,
22 * the usable vector space is 0x20-0xff (224 vectors)
23 */
24
25/*
26 * The maximum number of vectors supported by x86_64 processors
27 * is limited to 256. For processors other than x86_64, NR_VECTORS
28 * should be changed accordingly.
29 */
30#define NR_VECTORS 256
31
32#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
33
34#ifdef CONFIG_PCI_MSI
35#define NR_IRQS FIRST_SYSTEM_VECTOR
36#define NR_IRQ_VECTORS NR_IRQS
37#else
38#define NR_IRQS 224
Andi Kleen5580ece2006-01-16 01:56:54 +010039#define NR_IRQ_VECTORS (32 * NR_CPUS)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#endif
41
42static __inline__ int irq_canonicalize(int irq)
43{
44 return ((irq == 2) ? 9 : irq);
45}
46
47#ifdef CONFIG_X86_LOCAL_APIC
48#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
49#endif
50
Ashok Raj76e4f662005-06-25 14:55:00 -070051#ifdef CONFIG_HOTPLUG_CPU
52#include <linux/cpumask.h>
53extern void fixup_irqs(cpumask_t map);
54#endif
55
Andi Kleened6b6762005-07-28 21:15:49 -070056#define __ARCH_HAS_DO_SOFTIRQ 1
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#endif /* _ASM_IRQ_H */