IRQF_ONESHOT:Interrupt is not reenabled after the hardirq handler finished. Used by threaded interrupts which need to keep the irq line disabled until the threaded handler has been run.这里linus在邮件列表里指明IRQF_ONESHOT 的原因 Making the IRQF_ONESHOT explicit does two things: - it makes peop...
int request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char *devname, void *dev_id) 和request_irq非常类似,irq是中断号, handler是在发生中断时,首先要执行的code,非常类似于顶半,该函数最后会return IRQ_WAKE_THREAD来唤醒中断线程,...
intrequest_threaded_irq(unsignedintirq,irq_handler_thandler,irq_handler_tthread_fn,unsignedlongirqflags,constchar*devname,void*dev_id) 其中, irq 是中断号, handler 是在发生中断时首先要执行的处理程序,非常类似于顶半部,该函数最后会返回 IRQ_WAKE_THREAD 来唤醒中断线程。handler 一般设为NULL,用系统提...
intrequest_irq(unsignedintirq,irq_handler_thandler,unsignedlongflags,constchar*name,void*dev); 查看源码可知,这个函数其实是request_threaded_irq的一个特例,源码如下: staticinlineint__must_checkrequest_irq(unsignedintirq,irq_handler_thandler,unsignedlongflags,constchar*name,void*dev){returnrequest_threade...
函数原型:int request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags, const char *devname, void *dev_id) 返回类型:int 参数: 类型参数名称 unsigned int irq irq_handler_t handler irq_handler_t thread_fn unsigned long irqflags cons...
int ret = request_threaded_irq(irq, irq_handler, NULL, IRQF_SHARED, "my_irq_handler", NULL); if (ret) { printk(KERN_ERR "Unable to request IRQ %d: %d\n", irq, ret); return ret; } ``` 这里使用"request_threaded_irq"函数注册中断处理函数。参数分别是IRQ号、中断处理函数、对应的设备...
retval = request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap); #else retval = request_threaded_irq(uap->port.irq, NULL, pl011_int, IRQ_TYPE_NONE | IRQF_ONESHOT, "uart-pl011", uap); 【作者】张昺华 【微信公众号】 张昺华...
2.irq_desc 组织方式 irq_desc在内核中有两种组织方式，这是根据宏CONFIG_SPARSE_IRQ是否定义来...
linux中断申请之request_threaded_irq 2014-09-21 16:06 −转载:linux中断申请之request_threaded_irq 在linux里,中断处理分为顶半(top half),底半(bottom half),在顶半里处理优先级比较高的事情,要求占用中断时间尽量的短,在处理完成后,就激活底半,有底半处理其余任务。底半的处理方式主要有sof... ...
下列关于linux中request_threaded_irq的描述,不正确的是( ) 该函数中有一个参数,用来设置中断类型,比如设置上升沿中断或者下降沿中断等 该函数用来进行中断配置的 该函数可以通过不同的参数设置来使能中断线程化 该函数没有返回值,因此不建议使用该函数 查看答案及解析 添加笔记 求解答(0) 邀请回答 收藏(11)...