Rev 424 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 424 | giacomo | 1 | /* |
| 2 | * This file should contain #defines for all of the interrupt vector |
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| 3 | * numbers used by this architecture. |
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| 4 | * |
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| 5 | * In addition, there are some standard defines: |
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| 6 | * |
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| 7 | * FIRST_EXTERNAL_VECTOR: |
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| 8 | * The first free place for external interrupts |
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| 9 | * |
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| 10 | * SYSCALL_VECTOR: |
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| 11 | * The IRQ vector a syscall makes the user to kernel transition |
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| 12 | * under. |
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| 13 | * |
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| 14 | * TIMER_IRQ: |
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| 15 | * The IRQ number the timer interrupt comes in at. |
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| 16 | * |
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| 17 | * NR_IRQS: |
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| 18 | * The total number of interrupt vectors (including all the |
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| 19 | * architecture specific interrupts) needed. |
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| 20 | * |
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| 21 | * NR_IRQ_VECTORS: |
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| 22 | * The total number of IO APIC vector inputs |
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| 23 | * |
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| 24 | */ |
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| 25 | #ifndef _ASM_IRQ_VECTORS_H |
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| 26 | #define _ASM_IRQ_VECTORS_H |
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| 27 | |||
| 28 | /* |
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| 29 | * IDT vectors usable for external interrupt sources start |
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| 30 | * at 0x20: |
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| 31 | */ |
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| 32 | #define FIRST_EXTERNAL_VECTOR 0x20 |
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| 33 | |||
| 34 | #define SYSCALL_VECTOR 0x80 |
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| 35 | |||
| 36 | /* |
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| 37 | * Vectors 0x20-0x2f are used for ISA interrupts. |
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| 38 | */ |
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| 39 | |||
| 40 | /* |
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| 41 | * Special IRQ vectors used by the SMP architecture, 0xf0-0xff |
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| 42 | * |
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| 43 | * some of the following vectors are 'rare', they are merged |
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| 44 | * into a single vector (CALL_FUNCTION_VECTOR) to save vector space. |
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| 45 | * TLB, reschedule and local APIC vectors are performance-critical. |
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| 46 | * |
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| 47 | * Vectors 0xf0-0xfa are free (reserved for future Linux use). |
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| 48 | */ |
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| 49 | #define SPURIOUS_APIC_VECTOR 0xff |
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| 50 | #define ERROR_APIC_VECTOR 0xfe |
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| 51 | #define INVALIDATE_TLB_VECTOR 0xfd |
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| 52 | #define RESCHEDULE_VECTOR 0xfc |
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| 53 | #define CALL_FUNCTION_VECTOR 0xfb |
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| 54 | |||
| 55 | #define THERMAL_APIC_VECTOR 0xf0 |
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| 56 | /* |
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| 57 | * Local APIC timer IRQ vector is on a different priority level, |
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| 58 | * to work around the 'lost local interrupt if more than 2 IRQ |
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| 59 | * sources per level' errata. |
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| 60 | */ |
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| 61 | #define LOCAL_TIMER_VECTOR 0xef |
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| 62 | |||
| 63 | /* |
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| 64 | * First APIC vector available to drivers: (vectors 0x30-0xee) |
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| 65 | * we start at 0x31 to spread out vectors evenly between priority |
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| 66 | * levels. (0x80 is the syscall vector) |
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| 67 | */ |
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| 68 | #define FIRST_DEVICE_VECTOR 0x31 |
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| 69 | #define FIRST_SYSTEM_VECTOR 0xef |
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| 70 | |||
| 71 | #define TIMER_IRQ 0 |
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| 72 | |||
| 73 | /* |
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| 74 | * 16 8259A IRQ's, 208 potential APIC interrupt sources. |
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| 75 | * Right now the APIC is mostly only used for SMP. |
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| 76 | * 256 vectors is an architectural limit. (we can have |
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| 77 | * more than 256 devices theoretically, but they will |
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| 78 | * have to use shared interrupts) |
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| 79 | * Since vectors 0x00-0x1f are used/reserved for the CPU, |
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| 80 | * the usable vector space is 0x20-0xff (224 vectors) |
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| 81 | */ |
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| 82 | #ifdef CONFIG_X86_IO_APIC |
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| 83 | #define NR_IRQS 224 |
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| 84 | #else |
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| 85 | #define NR_IRQS 16 |
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| 86 | #endif |
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| 87 | |||
| 88 | #define NR_IRQ_VECTORS NR_IRQS |
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| 89 | |||
| 90 | #define FPU_IRQ 8 |
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| 91 | |||
| 92 | #define FIRST_VM86_IRQ 2 |
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| 93 | #define LAST_VM86_IRQ 15 |
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| 94 | #define invalid_vm86_irq(irq) ((irq) < 2 || (irq) == 7 || (irq) > 15) |
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| 95 | |||
| 96 | #endif /* _ASM_IRQ_VECTORS_H */ |
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| 97 | |||
| 98 |