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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _ASM_HW_IRQ_H
2#define _ASM_HW_IRQ_H
3
4/*
5 * linux/include/asm/hw_irq.h
6 *
7 * (C) 1992, 1993 Linus Torvalds, (C) 1997 Ingo Molnar
8 *
9 * moved some of the old arch/i386/kernel/irq.h to here. VY
10 *
11 * IRQ/IPI changes taken from work by Thomas Radke
12 * <tomsoft@informatik.tu-chemnitz.de>
13 *
14 * hacked by Andi Kleen for x86-64.
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 */
16
17#ifndef __ASSEMBLY__
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <asm/atomic.h>
19#include <asm/irq.h>
20#include <linux/profile.h>
21#include <linux/smp.h>
22
23struct hw_interrupt_type;
24#endif
25
Jan Beulich1a426cb2005-09-12 18:49:24 +020026#define NMI_VECTOR 0x02
Linus Torvalds1da177e2005-04-16 15:20:36 -070027/*
28 * IDT vectors usable for external interrupt sources start
29 * at 0x20:
30 */
31#define FIRST_EXTERNAL_VECTOR 0x20
32
33#define IA32_SYSCALL_VECTOR 0x80
34
35
36/*
37 * Vectors 0x20-0x2f are used for ISA interrupts.
38 */
39
40/*
41 * Special IRQ vectors used by the SMP architecture, 0xf0-0xff
42 *
43 * some of the following vectors are 'rare', they are merged
44 * into a single vector (CALL_FUNCTION_VECTOR) to save vector space.
45 * TLB, reschedule and local APIC vectors are performance-critical.
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 */
47#define SPURIOUS_APIC_VECTOR 0xff
48#define ERROR_APIC_VECTOR 0xfe
Andi Kleene5bc8b62005-09-12 18:49:24 +020049#define RESCHEDULE_VECTOR 0xfd
50#define CALL_FUNCTION_VECTOR 0xfc
Andi Kleen915f34e2006-01-11 22:45:54 +010051/* fb free - please don't readd KDB here because it's useless
52 (hint - think what a NMI bit does to a vector) */
Andi Kleene5bc8b62005-09-12 18:49:24 +020053#define THERMAL_APIC_VECTOR 0xfa
Jacob Shin89b831e2005-11-05 17:25:53 +010054#define THRESHOLD_APIC_VECTOR 0xf9
Jason Uhlenkotte080e9d2006-01-11 22:45:51 +010055/* f8 free */
56#define INVALIDATE_TLB_VECTOR_END 0xf7
57#define INVALIDATE_TLB_VECTOR_START 0xf0 /* f0-f7 used for TLB flush */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Andi Kleene5bc8b62005-09-12 18:49:24 +020059#define NUM_INVALIDATE_TLB_VECTORS 8
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61/*
62 * Local APIC timer IRQ vector is on a different priority level,
63 * to work around the 'lost local interrupt if more than 2 IRQ
64 * sources per level' errata.
65 */
66#define LOCAL_TIMER_VECTOR 0xef
67
68/*
69 * First APIC vector available to drivers: (vectors 0x30-0xee)
70 * we start at 0x31 to spread out vectors evenly between priority
71 * levels. (0x80 is the syscall vector)
72 */
73#define FIRST_DEVICE_VECTOR 0x31
74#define FIRST_SYSTEM_VECTOR 0xef /* duplicated in irq.h */
75
76
77#ifndef __ASSEMBLY__
78extern u8 irq_vector[NR_IRQ_VECTORS];
79#define IO_APIC_VECTOR(irq) (irq_vector[irq])
80#define AUTO_ASSIGN -1
81
82/*
83 * Various low-level irq details needed by irq.c, process.c,
84 * time.c, io_apic.c and smp.c
85 *
86 * Interrupt entry/exit code at both C and assembly level
87 */
88
89extern void disable_8259A_irq(unsigned int irq);
90extern void enable_8259A_irq(unsigned int irq);
91extern int i8259A_irq_pending(unsigned int irq);
92extern void make_8259A_irq(unsigned int irq);
93extern void init_8259A(int aeoi);
94extern void FASTCALL(send_IPI_self(int vector));
95extern void init_VISWS_APIC_irqs(void);
96extern void setup_IO_APIC(void);
97extern void disable_IO_APIC(void);
98extern void print_IO_APIC(void);
99extern int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
100extern void send_IPI(int dest, int vector);
101extern void setup_ioapic_dest(void);
102
103extern unsigned long io_apic_irqs;
104
105extern atomic_t irq_err_count;
106extern atomic_t irq_mis_count;
107
108#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
109
110#define __STR(x) #x
111#define STR(x) __STR(x)
112
113#include <asm/ptrace.h>
114
115#define IRQ_NAME2(nr) nr##_interrupt(void)
116#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
117
118/*
119 * SMP has a few special interrupts for IPI messages
120 */
121
122#define BUILD_IRQ(nr) \
123asmlinkage void IRQ_NAME(nr); \
124__asm__( \
125"\n.p2align\n" \
126"IRQ" #nr "_interrupt:\n\t" \
Rusty Russell19eadf92006-06-27 02:53:44 -0700127 "push $~(" #nr ") ; " \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 "jmp common_interrupt");
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130#define platform_legacy_irq(irq) ((irq) < 16)
131
132#endif
133
134#endif /* _ASM_HW_IRQ_H */