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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, 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 (32 * NR_CPUS) #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 #ifdef CONFIG_HOTPLUG_CPU #include <linux/cpumask.h> extern void fixup_irqs(cpumask_t map); #endif #define __ARCH_HAS_DO_SOFTIRQ 1 #endif /* _ASM_IRQ_H */