blob: 59d6681dec7bca59e216db1a1ee0ac3700443718 (
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/* $Id: hardirq.h,v 1.8 2000/03/02 02:37:13 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, 2000 by Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_HARDIRQ_H
#define _ASM_HARDIRQ_H
#include <linux/config.h>
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/irq.h>
typedef struct {
unsigned int __local_irq_count;
unsigned int __local_bh_count;
} ____cacheline_aligned irq_cpustat_t;
extern irq_cpustat_t irq_stat [NR_CPUS];
/*
* Simple wrappers reducing source bloat
*/
#define local_irq_count(cpu) (irq_stat[(cpu)].__local_irq_count)
#define local_bh_count(cpu) (irq_stat[(cpu)].__local_bh_count)
#define nmi_counter(cpu) (irq_stat[(cpu)].__nmi_counter)
/*
* 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 CONFIG_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 /* CONFIG_SMP */
#endif /* _ASM_HARDIRQ_H */
|
