[deliverable/linux.git] / include / asm-arm26 / hardirq.h

#ifndef __ASM_HARDIRQ_H
#define __ASM_HARDIRQ_H

#include <linux/config.h>
#include <linux/cache.h>
#include <linux/threads.h>

typedef struct {
	unsigned int __softirq_pending;
} ____cacheline_aligned irq_cpustat_t;

#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

#define HARDIRQ_BITS	8

/*
 * The hardirq mask has to be large enough to have space
 * for potentially all IRQ sources in the system nesting
 * on a single CPU:
 */
#if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
#endif

#define irq_enter()		(preempt_count() += HARDIRQ_OFFSET)

#ifndef CONFIG_SMP

extern asmlinkage void __do_softirq(void);

#define irq_exit()                                                      \
        do {                                                            \
                preempt_count() -= IRQ_EXIT_OFFSET;                     \
                if (!in_interrupt() && local_softirq_pending())         \
                        __do_softirq();                                 \
                preempt_enable_no_resched();                            \
        } while (0)
#endif


#endif /* __ASM_HARDIRQ_H */
Commit	Line	Data
1da177e4 LT	1	#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
	8	typedef 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
	29	extern 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 */