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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> */ #define TIMER_IRQ 0 /* * 16 8259A IRQ's, 240 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) */ #define NR_IRQS 224 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); #endif /* _ASM_IRQ_H */ |