What is the difference between FIQ and IRQ interrupt system?
Jun 10, 2009 · I want to know the difference between FIQ and IRQ interrupt system in any microprocessor, e.g: ARM926EJ.
Understanding kernel message 'nobody cared (try booting with the ...
Dec 13, 2012 · 21 I'm trying to understand the meaning of the following message: irq N:nobody cared (try booting with the "irqpoll" option) Does this mean the IRQ handler not processing the response …
Linux UIO IRQ related periodic CPU usage - Stack Overflow
Apr 17, 2025 · I have an Intel Arria 10 SoC FPGA system with 5.4.104-lts Linux built with Yocto 3.3.1 and Poky. The installed FPGA image is doing nothing more than making interrupts to an UIO device, …
How to determine the IRQ number for a USB device?
May 18, 2013 · However, I am wondering how I would find what IRQ line (IRQ number) the device is interrupting on? That is, how do I determine what the value of the argument unsigned int irq in the …
spin_lock_irqsave vs spin_lock_irq - Stack Overflow
Nov 26, 2015 · spin_lock_irqsave is basically used to save the interrupt state before taking the spin lock, this is because spin lock disables the interrupt, when the lock is taken in interrupt context, and re …
What is the difference between IRQ Handler and Callback function?
Mar 5, 2020 · What do you mean by "calling TIM5_IRQHandler"? You should not be "calling" an interrupt handler. The interrupt vector table should be setup to point to the interrupt handler so that the …
What are linux irq domains, why are they needed?
Dec 19, 2015 · handle_nested_irq(irq_find_mapping(chip->gpio_chip.irqdomain, level)); irq_find_mapping() will find linux IRQ number by hardware IRQ number (using IRQ domain mapping …
What is the irq latency due to the operating system?
Feb 5, 2013 · Interrupt Request (irq) latency is the time that takes for interrupt request to travel from source of the interrupt to the point when it will be serviced. Because there are different interrupts …
Linux kernel interrupt handler mutex protection? - Stack Overflow
Jul 4, 2011 · Edit2) After reading some more SO posts : reading Why kernel code/thread executing in interrupt context cannot sleep? which links to Robert Loves article, I read this : some interrupt …
STM32_lib: Is there a function to pass the IRQ_handler routine to?
Sep 22, 2023 · Setting a new vector is then simply a case of setting the appropriate table element indexed by IRQ number to the function pointer you wish to handle the interrupt. On Cortex-M regular …