41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
#ifndef __ASM_HARDIRQ_H
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#define __ASM_HARDIRQ_H
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/* only non-SMP supported */
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#include <linux/threads.h>
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#include <linux/cache.h>
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/* entry.S is sensitive to the offsets of these fields */
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typedef struct {
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unsigned int __softirq_pending;
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unsigned int __local_irq_count;
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unsigned int __local_bh_count;
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unsigned int __syscall_count;
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struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
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} ____cacheline_aligned irq_cpustat_t;
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#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
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#define HARDIRQ_BITS 8
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/*
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* The hardirq mask has to be large enough to have
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* space for potentially all IRQ sources in the system
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* nesting on a single CPU:
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*/
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#if (1 << HARDIRQ_BITS) < NR_IRQS
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# error HARDIRQ_BITS is too low!
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#endif
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#define irq_enter() (preempt_count() += HARDIRQ_OFFSET)
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#define irq_exit() \
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do { \
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preempt_count() -= IRQ_EXIT_OFFSET; \
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if (!in_interrupt() && softirq_pending(smp_processor_id())) \
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do_softirq(); \
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preempt_enable_no_resched(); \
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} while (0)
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#endif /* __ASM_HARDIRQ_H */
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