blob: 3bc56d38dc16fb8d2d90fa66dcec0e13c1ccd3de (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
/* $Id: hardirq.h,v 1.3 2000/02/04 07:40:53 ralf Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1997, 1998, 1999 by Ralf Baechle
* Copyright (C) 1999 Silicon Graphics, Inc.
*/
#ifndef _ASM_HARDIRQ_H
#define _ASM_HARDIRQ_H
#include <linux/threads.h>
extern unsigned int local_irq_count[NR_CPUS];
/*
* Are we in an interrupt context? Either doing bottom half
* or hardware interrupt processing?
*/
#define in_interrupt() ({ int __cpu = smp_processor_id(); \
(local_irq_count[__cpu] + local_bh_count[__cpu] != 0); })
#define in_irq() (local_irq_count[smp_processor_id()] != 0)
#ifndef __SMP__
#define hardirq_trylock(cpu) (local_irq_count[cpu] == 0)
#define hardirq_endlock(cpu) do { } while (0)
#define irq_enter(cpu) (local_irq_count[cpu]++)
#define irq_exit(cpu) (local_irq_count[cpu]--)
#define synchronize_irq() barrier();
#else
#error No habla MIPS SMP
#endif /* __SMP__ */
#endif /* _ASM_HARDIRQ_H */
|