5 * linux/include/asm/hw_irq.h
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
9 * moved some of the old arch/i386/kernel/irq.h to here. VY
11 * IRQ/IPI changes taken from work by Thomas Radke
12 * <tomsoft@informatik.tu-chemnitz.de>
14 * hacked by Andi Kleen for x86-64.
18 #include <asm/atomic.h>
20 #include <linux/profile.h>
21 #include <linux/smp.h>
22 #include <linux/percpu.h>
25 #define NMI_VECTOR 0x02
27 * IDT vectors usable for external interrupt sources start
30 #define FIRST_EXTERNAL_VECTOR 0x20
32 #define IA32_SYSCALL_VECTOR 0x80
35 /* Reserve the lowest usable priority level 0x20 - 0x2f for triggering
36 * cleanup after irq migration.
38 #define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
41 * Vectors 0x30-0x3f are used for ISA interrupts.
43 #define IRQ0_VECTOR FIRST_EXTERNAL_VECTOR + 0x10
44 #define IRQ1_VECTOR IRQ0_VECTOR + 1
45 #define IRQ2_VECTOR IRQ0_VECTOR + 2
46 #define IRQ3_VECTOR IRQ0_VECTOR + 3
47 #define IRQ4_VECTOR IRQ0_VECTOR + 4
48 #define IRQ5_VECTOR IRQ0_VECTOR + 5
49 #define IRQ6_VECTOR IRQ0_VECTOR + 6
50 #define IRQ7_VECTOR IRQ0_VECTOR + 7
51 #define IRQ8_VECTOR IRQ0_VECTOR + 8
52 #define IRQ9_VECTOR IRQ0_VECTOR + 9
53 #define IRQ10_VECTOR IRQ0_VECTOR + 10
54 #define IRQ11_VECTOR IRQ0_VECTOR + 11
55 #define IRQ12_VECTOR IRQ0_VECTOR + 12
56 #define IRQ13_VECTOR IRQ0_VECTOR + 13
57 #define IRQ14_VECTOR IRQ0_VECTOR + 14
58 #define IRQ15_VECTOR IRQ0_VECTOR + 15
61 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
63 * some of the following vectors are 'rare', they are merged
64 * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
65 * TLB, reschedule and local APIC vectors are performance-critical.
67 #define SPURIOUS_APIC_VECTOR 0xff
68 #define ERROR_APIC_VECTOR 0xfe
69 #define RESCHEDULE_VECTOR 0xfd
70 #define CALL_FUNCTION_VECTOR 0xfc
71 /* fb free - please don't readd KDB here because it's useless
72 (hint - think what a NMI bit does to a vector) */
73 #define THERMAL_APIC_VECTOR 0xfa
74 #define THRESHOLD_APIC_VECTOR 0xf9
76 #define INVALIDATE_TLB_VECTOR_END 0xf7
77 #define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */
79 #define NUM_INVALIDATE_TLB_VECTORS 8
82 * Local APIC timer IRQ vector is on a different priority level,
83 * to work around the 'lost local interrupt if more than 2 IRQ
84 * sources per level' errata.
86 #define LOCAL_TIMER_VECTOR 0xef
89 * First APIC vector available to drivers: (vectors 0x30-0xee)
90 * we start at 0x41 to spread out vectors evenly between priority
91 * levels. (0x80 is the syscall vector)
93 #define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
94 #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
99 /* Interrupt handlers registered during init_IRQ */
100 void apic_timer_interrupt(void);
101 void spurious_interrupt(void);
102 void error_interrupt(void);
103 void reschedule_interrupt(void);
104 void call_function_interrupt(void);
105 void irq_move_cleanup_interrupt(void);
106 void invalidate_interrupt0(void);
107 void invalidate_interrupt1(void);
108 void invalidate_interrupt2(void);
109 void invalidate_interrupt3(void);
110 void invalidate_interrupt4(void);
111 void invalidate_interrupt5(void);
112 void invalidate_interrupt6(void);
113 void invalidate_interrupt7(void);
114 void thermal_interrupt(void);
115 void threshold_interrupt(void);
116 void i8254_timer_resume(void);
118 typedef int vector_irq_t
[NR_VECTORS
];
119 DECLARE_PER_CPU(vector_irq_t
, vector_irq
);
120 extern void __setup_vector_irq(int cpu
);
121 extern spinlock_t vector_lock
;
124 * Various low-level irq details needed by irq.c, process.c,
125 * time.c, io_apic.c and smp.c
127 * Interrupt entry/exit code at both C and assembly level
130 extern void disable_8259A_irq(unsigned int irq
);
131 extern void enable_8259A_irq(unsigned int irq
);
132 extern int i8259A_irq_pending(unsigned int irq
);
133 extern void make_8259A_irq(unsigned int irq
);
134 extern void init_8259A(int aeoi
);
135 extern void send_IPI_self(int vector
);
136 extern void init_VISWS_APIC_irqs(void);
137 extern void setup_IO_APIC(void);
138 extern void disable_IO_APIC(void);
139 extern void print_IO_APIC(void);
140 extern int IO_APIC_get_PCI_irq_vector(int bus
, int slot
, int fn
);
141 extern void send_IPI(int dest
, int vector
);
142 extern void setup_ioapic_dest(void);
144 extern unsigned long io_apic_irqs
;
146 extern atomic_t irq_err_count
;
147 extern atomic_t irq_mis_count
;
149 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
152 #define STR(x) __STR(x)
154 #include <asm/ptrace.h>
156 #define IRQ_NAME2(nr) nr##_interrupt(void)
157 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
160 * SMP has a few special interrupts for IPI messages
163 #define BUILD_IRQ(nr) \
164 asmlinkage void IRQ_NAME(nr); \
167 "IRQ" #nr "_interrupt:\n\t" \
168 "push $~(" #nr ") ; " \
169 "jmp common_interrupt");
171 #define platform_legacy_irq(irq) ((irq) < 16)
175 #endif /* _ASM_HW_IRQ_H */