Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * This file should contain #defines for all of the interrupt vector | |
3 | * numbers used by this architecture. | |
4 | * | |
5 | * In addition, there are some standard defines: | |
6 | * | |
7 | * FIRST_EXTERNAL_VECTOR: | |
8 | * The first free place for external interrupts | |
9 | * | |
10 | * SYSCALL_VECTOR: | |
11 | * The IRQ vector a syscall makes the user to kernel transition | |
12 | * under. | |
13 | * | |
14 | * TIMER_IRQ: | |
15 | * The IRQ number the timer interrupt comes in at. | |
16 | * | |
17 | * NR_IRQS: | |
18 | * The total number of interrupt vectors (including all the | |
19 | * architecture specific interrupts) needed. | |
20 | * | |
21 | */ | |
22 | #ifndef _ASM_IRQ_VECTORS_H | |
23 | #define _ASM_IRQ_VECTORS_H | |
24 | ||
25 | /* | |
26 | * IDT vectors usable for external interrupt sources start | |
27 | * at 0x20: | |
28 | */ | |
29 | #define FIRST_EXTERNAL_VECTOR 0x20 | |
30 | ||
31 | #define SYSCALL_VECTOR 0x80 | |
32 | ||
33 | /* | |
34 | * Vectors 0x20-0x2f are used for ISA interrupts. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * Special IRQ vectors used by the SMP architecture, 0xf0-0xff | |
39 | * | |
40 | * some of the following vectors are 'rare', they are merged | |
41 | * into a single vector (CALL_FUNCTION_VECTOR) to save vector space. | |
42 | * TLB, reschedule and local APIC vectors are performance-critical. | |
43 | * | |
44 | * Vectors 0xf0-0xfa are free (reserved for future Linux use). | |
45 | */ | |
46 | #define SPURIOUS_APIC_VECTOR 0xff | |
47 | #define ERROR_APIC_VECTOR 0xfe | |
48 | #define INVALIDATE_TLB_VECTOR 0xfd | |
49 | #define RESCHEDULE_VECTOR 0xfc | |
50 | #define CALL_FUNCTION_VECTOR 0xfb | |
51 | ||
52 | #define THERMAL_APIC_VECTOR 0xf0 | |
53 | /* | |
54 | * Local APIC timer IRQ vector is on a different priority level, | |
55 | * to work around the 'lost local interrupt if more than 2 IRQ | |
56 | * sources per level' errata. | |
57 | */ | |
58 | #define LOCAL_TIMER_VECTOR 0xef | |
59 | ||
60 | /* | |
61 | * First APIC vector available to drivers: (vectors 0x30-0xee) | |
62 | * we start at 0x31 to spread out vectors evenly between priority | |
63 | * levels. (0x80 is the syscall vector) | |
64 | */ | |
65 | #define FIRST_DEVICE_VECTOR 0x31 | |
66 | #define FIRST_SYSTEM_VECTOR 0xef | |
67 | ||
68 | #define TIMER_IRQ 0 | |
69 | ||
70 | /* | |
71 | * 16 8259A IRQ's, 208 potential APIC interrupt sources. | |
72 | * Right now the APIC is mostly only used for SMP. | |
73 | * 256 vectors is an architectural limit. (we can have | |
74 | * more than 256 devices theoretically, but they will | |
75 | * have to use shared interrupts) | |
76 | * Since vectors 0x00-0x1f are used/reserved for the CPU, | |
77 | * the usable vector space is 0x20-0xff (224 vectors) | |
78 | */ | |
79 | ||
80 | /* | |
81 | * The maximum number of vectors supported by i386 processors | |
82 | * is limited to 256. For processors other than i386, NR_VECTORS | |
83 | * should be changed accordingly. | |
84 | */ | |
85 | #define NR_VECTORS 256 | |
86 | ||
87 | #include "irq_vectors_limits.h" | |
88 | ||
89 | #define FPU_IRQ 13 | |
90 | ||
91 | #define FIRST_VM86_IRQ 3 | |
92 | #define LAST_VM86_IRQ 15 | |
93 | #define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15) | |
94 | ||
95 | ||
96 | #endif /* _ASM_IRQ_VECTORS_H */ |