因此,对于slow handler,在从high level handler转入specific handler中间会根据IRQF_DISABLED这个flag来决定是否打开中断,具体代码如下(来自2.6.23内核): irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action) { …… if (!(action->flags & IRQF_DISABLED)) local_irq_enable_in_hardirq(...
缺省值为“Disabled”。 ResourcesControlledBy（系统资源控制方式） 设置为“Manual”时，手动控制PNP卡资源，可将IRQ或DMA值分配给PCI／ISA（PNP及非PNP卡）；设置为“Auto（ESCD）”时，如果ISA卡及PCI卡全是PNP卡，可选择此项为Auto，由BIOS自动分配中断资源。缺省值为“Auto（ESCD）” IRQResources（IRQ资源...
irq:可断号 handler:中断处理程序 irqflags:中断处理标志.SA_SHIRQ:共享中断线 SA_INTERRUPT:快速处理中断 必须在关中断的情况下运行.SA_SAMPLE_RANDOM:该中断可能用于产生一个随机数 devname dev_id:设备名称与ID */ int request_irq(unsigned int irq,irqreturn_t (*handler)(int, void *, struct pt_r...
(unsigned int irq, unsigned int bitmask); static inline bool irq_balancing_disabled(unsigned int irq) { return irq_check_status_bit(irq, IRQ_NO_BALANCING_MASK); } static inline bool irq_is_percpu(unsigned int irq) { return irq_check_status_bit(irq, IRQ_PER_CPU); }...
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Bi-directional (default • EPP • ECP • 378 (default) 378 默认 • 278 Output Only AT Bi-directional PS/2 EPP ECP Enabled I/O 地址 • IRQ 5 • IRQ 7 (default) IRQ 7 默认 Enabled • Disabled 禁用 • Enabled (default • Disabled 禁用 • Enabled (default LAN 设备 58...
* disabled while the handler was running. */ desc->handler->end(irq);/*给中断芯片一个结束的操作,一般是允许再次接收中断*/ spin_unlock(&desc->lock); if (softirq_active(cpu) & softirq_mask(cpu)) do_softirq();/*执行软中断*/ return 1; ...
irq_desc[i].status = IRQ_DISABLED; irq_desc[i].action = 0; irq_desc[i].depth = 0; if (i < 16) { irq_desc[i].handler = &i8259A_irq_type; } else { irq_desc[i].handler = &no_irq_type; } } } 把IRQ小于16的handler都置为了i8259A_irq_type。 i8259A_irq_type定义如下: ...
If inband alerting is disabled, local alerting is generated on the originating gateway. To reset this command to the default value, use the default command. Examples The following example disables inband alerting: Router(config)# sip-ua Router(config-sip-ua)# no inband-alerting Related ...
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