| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_IRQ_VECTORS_H |
| 2 | #define _ASM_IRQ_VECTORS_H |
| 3 | |
| 4 | /* |
| 5 | * IDT vectors usable for external interrupt sources start |
| 6 | * at 0x20: |
| 7 | */ |
| 8 | #define FIRST_EXTERNAL_VECTOR 0x20 |
| 9 | |
| 10 | #define SYSCALL_VECTOR 0x80 |
| 11 | |
| 12 | /* |
| 13 | * Vectors 0x20-0x2f are used for ISA interrupts. |
| 14 | */ |
| 15 | |
| 16 | /* |
| 17 | * Special IRQ vectors used by the SMP architecture, 0xf0-0xff |
| 18 | * |
| 19 | * some of the following vectors are 'rare', they are merged |
| 20 | * into a single vector (CALL_FUNCTION_VECTOR) to save vector space. |
| 21 | * TLB, reschedule and local APIC vectors are performance-critical. |
| 22 | * |
| 23 | * Vectors 0xf0-0xfa are free (reserved for future Linux use). |
| 24 | */ |
| 25 | #define SPURIOUS_APIC_VECTOR 0xff |
| 26 | #define ERROR_APIC_VECTOR 0xfe |
| 27 | #define INVALIDATE_TLB_VECTOR 0xfd |
| 28 | #define RESCHEDULE_VECTOR 0xfc |
| 29 | #define CALL_FUNCTION_VECTOR 0xfb |
| 30 | |
| 31 | #define THERMAL_APIC_VECTOR 0xf0 |
| 32 | /* |
| 33 | * Local APIC timer IRQ vector is on a different priority level, |
| 34 | * to work around the 'lost local interrupt if more than 2 IRQ |
| 35 | * sources per level' errata. |
| 36 | */ |
| 37 | #define LOCAL_TIMER_VECTOR 0xef |
| 38 | |
| 39 | /* |
| 40 | * First APIC vector available to drivers: (vectors 0x30-0xee) |
| 41 | * we start at 0x31 to spread out vectors evenly between priority |
| 42 | * levels. (0x80 is the syscall vector) |
| 43 | */ |
| 44 | #define FIRST_DEVICE_VECTOR 0x31 |
| 45 | #define FIRST_SYSTEM_VECTOR 0xef |
| 46 | |
| 47 | #define TIMER_IRQ 0 |
| 48 | |
| 49 | /* |
| 50 | * IRQ definitions |
| 51 | */ |
| 52 | #define NR_VECTORS 256 |
| 53 | #define NR_IRQS 224 |
| 54 | #define NR_IRQ_VECTORS NR_IRQS |
| 55 | |
| 56 | #define FPU_IRQ 13 |
| 57 | |
| 58 | #define FIRST_VM86_IRQ 3 |
| 59 | #define LAST_VM86_IRQ 15 |
| 60 | #define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15) |
| 61 | |
| 62 | #endif /* _ASM_IRQ_VECTORS_H */ |