projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _ASM_IRQ_H |
| 2 | #define _ASM_IRQ_H | |
| 3 | ||
| 4 | /* | |
| 5 | * linux/include/asm/irq.h | |
| 6 | * | |
| 7 | * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar | |
| 8 | * | |
| 9 | * IRQ/IPI changes taken from work by Thomas Radke | |
| 10 | * <[email protected]> | |
| 11 | */ | |
| 12 | ||
| 13 | #define TIMER_IRQ 0 | |
| 14 | ||
| 15 | /* | |
| 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) | |
| 23 | */ | |
| 24 | ||
| 25 | /* | |
| 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. | |
| 29 | */ | |
| 30 | #define NR_VECTORS 256 | |
| 31 | ||
| 32 | #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in hw_irq.h */ | |
| 33 | ||
| 550f2299 EB |
34 | #define NR_IRQS (NR_VECTORS + (32 *NR_CPUS)) |
| 35 | #define NR_IRQ_VECTORS NR_IRQS | |
| 1da177e4 LT |
36 | |
| 37 | static __inline__ int irq_canonicalize(int irq) | |
| 38 | { | |
| 39 | return ((irq == 2) ? 9 : irq); | |
| 40 | } | |
| 41 | ||
| 1da177e4 | 42 | #define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */ |
| 1da177e4 | 43 | |
| 76e4f660 AR |
44 | #ifdef CONFIG_HOTPLUG_CPU |
| 45 | #include <linux/cpumask.h> | |
| 46 | extern void fixup_irqs(cpumask_t map); | |
| 47 | #endif | |
| 48 | ||
| ed6b676c AK |
49 | #define __ARCH_HAS_DO_SOFTIRQ 1 |
| 50 | ||
| 1da177e4 | 51 | #endif /* _ASM_IRQ_H */ |