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...
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...
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 pe...
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...
request_irq()——注册中断服务 2012-04-03 23:15 −在 2.4 内核和 2.6内核中都使用 request_irq() 函数来注册中断服务函数。在 2.4 内核中,需要包含的头文件是 #include <linux/sched.h> ,2.6 内核中需要包含的头文件则是 #include <linux/interrupt.h>... ...
request_threaded_irq 即 中断线程(threaded interrupt handler), 使用场景同的request_irq也继续类似。使用时可根据实际情况选择合适的接口,可使用request_threaded_irq的地方没必要继续使用request_irq加tasklet/workqueue或者内核线程的方式;如果中断处理简单时也不要执着使用request_threaded_irq。
domain译码成IRQ number,然后通过IRQ number获取对应的中断描述符。调用中断描述符中的highlevel irq-...
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...
request_threaded_irq 是在将上半部的硬件中断处理缩短为只确定硬体中断来 自我们要处理的装置,唤醒kernel thread 执行后续中断任务。 缺点: 对于非irq 中断的kernel threads ,需要在原本task_struct 新增struct irqaction 多占 4/8 bytes 记忆体空间 linux kernel 2.6.29 之后(2.6.30)加入request_threaded_irq ...
寻找行为只是把机车移动到指定点。就像这样: public void seek(Vector2D target) { Vecto...