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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-x86_64/irq.h
5 * linux/include/asm/irq.h
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
9 * IRQ/IPI changes taken from work by Thomas Radke
10 * <tomsoft@informatik.tu-chemnitz.de>
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)
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.
30 #define NR_VECTORS 256
32 #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */
35 #define NR_IRQS FIRST_SYSTEM_VECTOR
36 #define NR_IRQ_VECTORS NR_IRQS
39 #define NR_IRQ_VECTORS 1024
42 static __inline__
int irq_canonicalize(int irq
)
44 return ((irq
== 2) ? 9 : irq
);
47 #ifdef CONFIG_X86_LOCAL_APIC
48 #define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
53 int handle_IRQ_event(unsigned int, struct pt_regs
*, struct irqaction
*);
55 #ifdef CONFIG_HOTPLUG_CPU
56 #include <linux/cpumask.h>
57 extern void fixup_irqs(cpumask_t map
);
60 #define __ARCH_HAS_DO_SOFTIRQ 1
62 #endif /* _ASM_IRQ_H */