fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / irq_64.h
blob5006c6e7565618fc0efc5918dc13e88d4833bf6c
1 #ifndef _ASM_IRQ_H
2 #define _ASM_IRQ_H
4 /*
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>
13 #define TIMER_IRQ 0
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 */
34 #define NR_IRQS (NR_VECTORS + (32 *NR_CPUS))
35 #define NR_IRQ_VECTORS NR_IRQS
37 static __inline__ int irq_canonicalize(int irq)
39 return ((irq == 2) ? 9 : irq);
42 #define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
44 #ifdef CONFIG_HOTPLUG_CPU
45 #include <linux/cpumask.h>
46 extern void fixup_irqs(cpumask_t map);
47 #endif
49 #define __ARCH_HAS_DO_SOFTIRQ 1
51 #endif /* _ASM_IRQ_H */