Viewing file:  irq.h (1.08 KB) -rw-r--r--
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#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>
#define TIMER_IRQ 0
/*
* 16 8259A IRQ's, 208 potential APIC interrupt sources.
* Right now the APIC is mostly only used for SMP.
* 256 vectors is an architectural limit. (we can have
* more than 256 devices theoretically, but they will
* have to use shared interrupts)
* Since vectors 0x00-0x1f are used/reserved for the CPU,
* the usable vector space is 0x20-0xff (224 vectors)
*/
#ifdef CONFIG_X86_IO_APIC
#define NR_IRQS 224
#else
#define NR_IRQS 16
#endif
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 release_x86_irqs(struct task_struct *);
#ifdef CONFIG_X86_LOCAL_APIC
#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */
#endif
#endif /* _ASM_IRQ_H */
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