tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
7 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
8 */
9#ifndef _ASM_IRQ_H
10#define _ASM_IRQ_H
11
12#include <linux/config.h>
13#include <linux/linkage.h>
14#include <irq.h>
15
16#ifdef CONFIG_I8259
17static inline int irq_canonicalize(int irq)
18{
19 return ((irq == 2) ? 9 : irq);
20}
21#else
22#define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */
23#endif
24
25struct pt_regs;
26
27extern asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs);
28
29#ifdef CONFIG_PREEMPT
30
31/*
32 * do_IRQ handles all normal device IRQ's (the special
33 * SMP cross-CPU interrupts have their own specific
34 * handlers).
35 *
36 * Ideally there should be away to get this into kernel/irq/handle.c to
37 * avoid the overhead of a call for just a tiny function ...
38 */
39#define do_IRQ(irq, regs) \
40do { \
41 irq_enter(); \
42 __do_IRQ((irq), (regs)); \
43 irq_exit(); \
44} while (0)
45
46#endif
47
48extern void arch_init_irq(void);
49
50#endif /* _ASM_IRQ_H */