tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#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#define NR_IRQS (NR_VECTORS + (32 *NR_CPUS))
35#define NR_IRQ_VECTORS NR_IRQS
36
37static __inline__ int irq_canonicalize(int irq)
38{
39 return ((irq == 2) ? 9 : irq);
40}
41
42#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
43
44#ifdef CONFIG_HOTPLUG_CPU
45#include <linux/cpumask.h>
46extern void fixup_irqs(cpumask_t map);
47#endif
48
49#define __ARCH_HAS_DO_SOFTIRQ 1
50
51#endif /* _ASM_IRQ_H */