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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
15#include <linux/config.h>
16#include <linux/profile.h>
17#include <asm/atomic.h>
18#include <asm/irq.h>
19#include <asm/sections.h>
20
21/*
22 * Various low-level irq details needed by irq.c, process.c,
23 * time.c, io_apic.c and smp.c
24 *
25 * Interrupt entry/exit code at both C and assembly level
26 */
27
28extern u8 irq_vector[NR_IRQ_VECTORS];
29#define IO_APIC_VECTOR(irq) (irq_vector[irq])
30#define AUTO_ASSIGN -1
31
32extern void (*interrupt[NR_IRQS])(void);
33
34#ifdef CONFIG_SMP
35fastcall void reschedule_interrupt(void);
36fastcall void invalidate_interrupt(void);
37fastcall void call_function_interrupt(void);
38#endif
39
40#ifdef CONFIG_X86_LOCAL_APIC
41fastcall void apic_timer_interrupt(void);
42fastcall void error_interrupt(void);
43fastcall void spurious_interrupt(void);
44fastcall void thermal_interrupt(struct pt_regs *);
45#define platform_legacy_irq(irq) ((irq) < 16)
46#endif
47
48void disable_8259A_irq(unsigned int irq);
49void enable_8259A_irq(unsigned int irq);
50int i8259A_irq_pending(unsigned int irq);
51void make_8259A_irq(unsigned int irq);
52void init_8259A(int aeoi);
53void FASTCALL(send_IPI_self(int vector));
54void init_VISWS_APIC_irqs(void);
55void setup_IO_APIC(void);
56void disable_IO_APIC(void);
57void print_IO_APIC(void);
58int IO_APIC_get_PCI_irq_vector(int bus, int slot, int fn);
59void send_IPI(int dest, int vector);
60void setup_ioapic_dest(void);
61
62extern unsigned long io_apic_irqs;
63
64extern atomic_t irq_err_count;
65extern atomic_t irq_mis_count;
66
67#define IO_APIC_IRQ(x) (((x) >= 16) || ((1<<(x)) & io_apic_irqs))
68
69#if defined(CONFIG_X86_IO_APIC)
70static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i)
71{
72 if (IO_APIC_IRQ(i))
73 send_IPI_self(IO_APIC_VECTOR(i));
74}
75#else
76static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
77#endif
78
79#endif /* _ASM_HW_IRQ_H */