blob: 791ee1da9bfa0f81a0e320c872a1fbebe520a81d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __ASM_HARDIRQ_H
2#define __ASM_HARDIRQ_H
3
4#include <linux/config.h>
5#include <linux/cache.h>
6#include <linux/threads.h>
7
8typedef struct {
9 unsigned int __softirq_pending;
10} ____cacheline_aligned irq_cpustat_t;
11
12#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
13
14#define HARDIRQ_BITS 8
15
16/*
17 * The hardirq mask has to be large enough to have space
18 * for potentially all IRQ sources in the system nesting
19 * on a single CPU:
20 */
21#if (1 << HARDIRQ_BITS) < NR_IRQS
22# error HARDIRQ_BITS is too low!
23#endif
24
25#define irq_enter() (preempt_count() += HARDIRQ_OFFSET)
26
27#ifndef CONFIG_SMP
28
29extern asmlinkage void __do_softirq(void);
30
31#define irq_exit() \
32 do { \
33 preempt_count() -= IRQ_EXIT_OFFSET; \
34 if (!in_interrupt() && local_softirq_pending()) \
35 __do_softirq(); \
36 preempt_enable_no_resched(); \
37 } while (0)
38#endif
39
40
41#endif /* __ASM_HARDIRQ_H */