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
36 * Vectors 0x20-0x2f are used for ISA interrupts.
38 #define IRQ0_VECTOR FIRST_EXTERNAL_VECTOR
39 #define IRQ1_VECTOR IRQ0_VECTOR + 1
40 #define IRQ2_VECTOR IRQ0_VECTOR + 2
41 #define IRQ3_VECTOR IRQ0_VECTOR + 3
42 #define IRQ4_VECTOR IRQ0_VECTOR + 4
43 #define IRQ5_VECTOR IRQ0_VECTOR + 5
44 #define IRQ6_VECTOR IRQ0_VECTOR + 6
45 #define IRQ7_VECTOR IRQ0_VECTOR + 7
46 #define IRQ8_VECTOR IRQ0_VECTOR + 8
47 #define IRQ9_VECTOR IRQ0_VECTOR + 9
48 #define IRQ10_VECTOR IRQ0_VECTOR + 10
49 #define IRQ11_VECTOR IRQ0_VECTOR + 11
50 #define IRQ12_VECTOR IRQ0_VECTOR + 12
51 #define IRQ13_VECTOR IRQ0_VECTOR + 13
52 #define IRQ14_VECTOR IRQ0_VECTOR + 14
53 #define IRQ15_VECTOR IRQ0_VECTOR + 15
56 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
58 * some of the following vectors are 'rare', they are merged
59 * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
60 * TLB, reschedule and local APIC vectors are performance-critical.
62 #define SPURIOUS_APIC_VECTOR 0xff
63 #define ERROR_APIC_VECTOR 0xfe
64 #define RESCHEDULE_VECTOR 0xfd
65 #define CALL_FUNCTION_VECTOR 0xfc
66 /* fb free - please don't readd KDB here because it's useless
67 (hint - think what a NMI bit does to a vector) */
68 #define THERMAL_APIC_VECTOR 0xfa
69 #define THRESHOLD_APIC_VECTOR 0xf9
71 #define INVALIDATE_TLB_VECTOR_END 0xf7
72 #define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */
74 #define NUM_INVALIDATE_TLB_VECTORS 8
77 * Local APIC timer IRQ vector is on a different priority level,
78 * to work around the 'lost local interrupt if more than 2 IRQ
79 * sources per level' errata.
81 #define LOCAL_TIMER_VECTOR 0xef
84 * First APIC vector available to drivers: (vectors 0x30-0xee)
85 * we start at 0x31 to spread out vectors evenly between priority
86 * levels. (0x80 is the syscall vector)
88 #define FIRST_DEVICE_VECTOR (IRQ15_VECTOR + 2)
89 #define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
93 typedef int vector_irq_t[NR_VECTORS];
94 DECLARE_PER_CPU(vector_irq_t, vector_irq);
95 extern void __setup_vector_irq(int cpu);
96 extern spinlock_t vector_lock;
99 * Various low-level irq details needed by irq.c, process.c,
100 * time.c, io_apic.c and smp.c
102 * Interrupt entry/exit code at both C and assembly level
105 extern void disable_8259A_irq(unsigned int irq);
106 extern void enable_8259A_irq(unsigned int irq);
107 extern int i8259A_irq_pending(unsigned int irq);
108 extern void make_8259A_irq(unsigned int irq);
109 extern void init_8259A(int aeoi);
110 extern void send_IPI_self(int vector);
111 extern void init_VISWS_APIC_irqs(void);
112 extern void setup_IO_APIC(void);
113 extern void disable_IO_APIC(void);
114 extern void print_IO_APIC(void);
115 extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
116 extern void send_IPI(int dest, int vector);
117 extern void setup_ioapic_dest(void);
119 extern unsigned long io_apic_irqs;
121 extern atomic_t irq_err_count;
122 extern atomic_t irq_mis_count;
124 #define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
127 #define STR(x) __STR(x)
129 #include <asm/ptrace.h>
131 #define IRQ_NAME2(nr) nr##_interrupt(void)
132 #define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
135 * SMP has a few special interrupts for IPI messages
138 #define BUILD_IRQ(nr) \
139 asmlinkage void IRQ_NAME(nr); \
142 "IRQ" #nr "_interrupt:\n\t" \
143 "push $~(" #nr ") ; " \
144 "jmp common_interrupt");
146 #define platform_legacy_irq(irq) ((irq) < 16)
150 #endif /* _ASM_HW_IRQ_H */