1 #ifndef _ASM_X86_IRQ_VECTORS_H
2 #define _ASM_X86_IRQ_VECTORS_H
4 #include <linux/threads.h>
6 #define NMI_VECTOR 0x02
9 * IDT vectors usable for external interrupt sources start
12 #define FIRST_EXTERNAL_VECTOR 0x20
15 # define SYSCALL_VECTOR 0x80
17 # define IA32_SYSCALL_VECTOR 0x80
21 * Reserve the lowest usable priority level 0x20 - 0x2f for triggering
22 * cleanup after irq migration.
24 #define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
27 * Vectors 0x30-0x3f are used for ISA interrupts.
29 #define IRQ0_VECTOR (FIRST_EXTERNAL_VECTOR + 0x10)
30 #define IRQ1_VECTOR (IRQ0_VECTOR + 1)
31 #define IRQ2_VECTOR (IRQ0_VECTOR + 2)
32 #define IRQ3_VECTOR (IRQ0_VECTOR + 3)
33 #define IRQ4_VECTOR (IRQ0_VECTOR + 4)
34 #define IRQ5_VECTOR (IRQ0_VECTOR + 5)
35 #define IRQ6_VECTOR (IRQ0_VECTOR + 6)
36 #define IRQ7_VECTOR (IRQ0_VECTOR + 7)
37 #define IRQ8_VECTOR (IRQ0_VECTOR + 8)
38 #define IRQ9_VECTOR (IRQ0_VECTOR + 9)
39 #define IRQ10_VECTOR (IRQ0_VECTOR + 10)
40 #define IRQ11_VECTOR (IRQ0_VECTOR + 11)
41 #define IRQ12_VECTOR (IRQ0_VECTOR + 12)
42 #define IRQ13_VECTOR (IRQ0_VECTOR + 13)
43 #define IRQ14_VECTOR (IRQ0_VECTOR + 14)
44 #define IRQ15_VECTOR (IRQ0_VECTOR + 15)
47 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
49 * some of the following vectors are 'rare', they are merged
50 * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
51 * TLB, reschedule and local APIC vectors are performance-critical.
54 #define SPURIOUS_APIC_VECTOR 0xff
58 #if ((SPURIOUS_APIC_VECTOR & 0x0F) != 0x0F)
59 # error SPURIOUS_APIC_VECTOR definition error
62 #define ERROR_APIC_VECTOR 0xfe
63 #define RESCHEDULE_VECTOR 0xfd
64 #define CALL_FUNCTION_VECTOR 0xfc
65 #define CALL_FUNCTION_SINGLE_VECTOR 0xfb
66 #define THERMAL_APIC_VECTOR 0xfa
69 /* 0xf8 - 0xf9 : free */
71 # define THRESHOLD_APIC_VECTOR 0xf9
72 # define UV_BAU_MESSAGE 0xf8
75 /* f0-f7 used for spreading out TLB flushes: */
76 #define INVALIDATE_TLB_VECTOR_END 0xf7
77 #define INVALIDATE_TLB_VECTOR_START 0xf0
78 #define NUM_INVALIDATE_TLB_VECTORS 8
81 * Local APIC timer IRQ vector is on a different priority level,
82 * to work around the 'lost local interrupt if more than 2 IRQ
83 * sources per level' errata.
85 #define LOCAL_TIMER_VECTOR 0xef
88 * Performance monitoring interrupt vector:
90 #define LOCAL_PERF_VECTOR 0xee
93 * First APIC vector available to drivers: (vectors 0x30-0xee) we
94 * start at 0x31(0x41) to spread out vectors evenly between priority
95 * levels. (0x80 is the syscall vector)
97 #define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
99 #define NR_VECTORS 256
103 #define FIRST_VM86_IRQ 3
104 #define LAST_VM86_IRQ 15
105 #define invalid_vm86_irq(irq) ((irq) < 3 || (irq) > 15)
107 #define NR_IRQS_LEGACY 16
109 #ifdef CONFIG_X86_IO_APIC
111 #include <asm/apicnum.h> /* need MAX_IO_APICS */
113 #ifndef CONFIG_SPARSE_IRQ
114 # if NR_CPUS < MAX_IO_APICS
115 # define NR_IRQS (NR_VECTORS + (32 * NR_CPUS))
117 # define NR_IRQS (NR_VECTORS + (32 * MAX_IO_APICS))
121 ((8 * NR_CPUS) > (32 * MAX_IO_APICS) ? \
122 (NR_VECTORS + (8 * NR_CPUS)) : \
123 (NR_VECTORS + (32 * MAX_IO_APICS)))
126 #else /* !CONFIG_X86_IO_APIC: */
130 #endif /* _ASM_X86_IRQ_VECTORS_H */