diff options
Diffstat (limited to 'include/asm-x86_64/irq.h')
| -rw-r--r-- | include/asm-x86_64/irq.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/include/asm-x86_64/irq.h b/include/asm-x86_64/irq.h new file mode 100644 index 000000000000..3af50b3c3b05 --- /dev/null +++ b/include/asm-x86_64/irq.h @@ -0,0 +1,55 @@ +#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, 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) + */ + +/* + * The maximum number of vectors supported by x86_64 processors + * is limited to 256. For processors other than x86_64, NR_VECTORS + * should be changed accordingly. + */ +#define NR_VECTORS 256 + +#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */ + +#ifdef CONFIG_PCI_MSI +#define NR_IRQS FIRST_SYSTEM_VECTOR +#define NR_IRQ_VECTORS NR_IRQS +#else +#define NR_IRQS 224 +#define NR_IRQ_VECTORS 1024 +#endif + +static __inline__ int irq_canonicalize(int irq) +{ + return ((irq == 2) ? 9 : irq); +} + +#ifdef CONFIG_X86_LOCAL_APIC +#define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */ +#endif + +struct irqaction; +struct pt_regs; +int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); + +#endif /* _ASM_IRQ_H */ |