hardirq.h

来自「linux 内核源代码」· C头文件 代码 · 共 46 行

#ifndef __BFIN_HARDIRQ_H
#define __BFIN_HARDIRQ_H

#include <linux/cache.h>
#include <linux/threads.h>
#include <asm/irq.h>

typedef struct {
	unsigned int __softirq_pending;
	unsigned int __syscall_count;
	struct task_struct *__ksoftirqd_task;
} ____cacheline_aligned irq_cpustat_t;

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

/*
 * We put the hardirq and softirq counter into the preemption
 * counter. The bitmask has the following meaning:
 *
 * - bits 0-7 are the preemption count (max preemption depth: 256)
 * - bits 8-15 are the softirq count (max # of softirqs: 256)
 * - bits 16-23 are the hardirq count (max # of hardirqs: 256)
 *
 * - ( bit 26 is the PREEMPT_ACTIVE flag. )
 *
 * PREEMPT_MASK: 0x000000ff
 * HARDIRQ_MASK: 0x0000ff00
 * SOFTIRQ_MASK: 0x00ff0000
 */

#if NR_IRQS > 256
#define HARDIRQ_BITS	9
#else
#define HARDIRQ_BITS	8
#endif

#ifdef NR_IRQS
# if (1 << HARDIRQ_BITS) < NR_IRQS
# error HARDIRQ_BITS is too low!
# endif
#endif

#define __ARCH_IRQ_EXIT_IRQS_DISABLED	1

#endif