projects / mirror_ubuntu-artful-kernel.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 | * <tomsoft@informatik.tu-chemnitz.de> | |
| 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 | ||
| 34 | #ifdef CONFIG_PCI_MSI | |
| 35 | #define NR_IRQS FIRST_SYSTEM_VECTOR | |
| 36 | #define NR_IRQ_VECTORS NR_IRQS | |
| 37 | #else | |
| 38 | #define NR_IRQS 224 | |
| 5580ecee | 39 | #define NR_IRQ_VECTORS (32 * NR_CPUS) |
| 1da177e4 LT |
40 | #endif |
| 41 | ||
| 42 | static __inline__ int irq_canonicalize(int irq) | |
| 43 | { | |
| 44 | return ((irq == 2) ? 9 : irq); | |
| 45 | } | |
| 46 | ||
| 47 | #ifdef CONFIG_X86_LOCAL_APIC | |
| 48 | #define ARCH_HAS_NMI_WATCHDOG /* See include/linux/nmi.h */ | |
| 49 | #endif | |
| 50 | ||
| 76e4f660 AR |
51 | #ifdef CONFIG_HOTPLUG_CPU |
| 52 | #include <linux/cpumask.h> | |
| 53 | extern void fixup_irqs(cpumask_t map); | |
| 54 | #endif | |
| 55 | ||
| ed6b676c AK |
56 | #define __ARCH_HAS_DO_SOFTIRQ 1 |
| 57 | ||
| 1da177e4 | 58 | #endif /* _ASM_IRQ_H */ |