WebFeb 16, 2016 · asmlinkage int handle_IRQ_event (unsigned int irq, struct pt_regs *regs, struct irqaction *action) { int status = 1; int retval = 0; if (! (action->flags & SA_INTERRUPT)) local_irq_enable (); do { status = action->flags; retval = action->handler (irq, action->dev_id, regs); action = action->next; } while (action); if (status & SA_SAMPLE_RANDOM) … WebThe struct irqaction pointed to by action contains various information about the handler, including the device name, action->name, and the device id, action->dev_id. When used in …
Linux Kernel Interrupt Handling - GitHub Pages
WebJan 31, 2013 · The argument irq is interrupt line number, not interrupt vector number. Look up ULK3 PDF, P203, Timer interrupt has IRQ 0, but its INT nr is 32! So I trigger the INT2 (NMI) but my handler handle the INT34 actually! I want to find more evidence in source code (e.g. how to convert IRQ to INT? WebThe data structure that defines a PIC object is called hw_interrupt_type (also called hw_irq_controller). For the sake of concreteness, let’s assume that our computer is a uniprocessor with two 8259A PICs, which provide 16 standard IRQs. ... struct irqaction irq0 = {timer_interrupt, SA_INTERRUPT, 0, "timer", NULL,}; setup_irq(0, &irq0); how many years car last
Understanding the Linux Kernel, Second Edition
WebDec 30, 2024 · IRQ descriptor data structure is defined as follows: typedef struct { unsigned int status; hw_irq_controller *handler; struct irqaction *action; unsigned int depth; spinlock_t lock; } ____cacheline_aligned irq_desc_t; Following is the … WebDec 20, 2016 · A device driver registers an interrupt handler and enables a given interrupt line for handling by calling request_irq (). the call flow is :-. request_irq () -> setup_irq () to … WebTherequest_irq()function requests that a specified function (the handler) be calledwhenever the kernel receives a given interrupt. The handler mayin turn register a bottom half, which … how many years did amf own harley davidson