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Fast interrupt request
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Fast interrupt request : ウィキペディア英語版
Fast interrupt request
Fast Interrupt Requests (FIQs) are a specialized type of Interrupt Request, a standard technique used in computer CPUs to deal with events which need to be processed as they occur such as receiving data from a network card, or keyboard or mouse actions. FIQs are specific to the ARM CPU architecture, which supports two types of interrupts; FIQs for fast, low latency interrupt handling and Interrupt Requests (IRQs), for more general interrupts.〔https://infocenter.arm.com/〕〔https://www.marilynwolf.us/CaC3e/〕
An FIQ takes priority over an IRQ in an ARM system. Also, only one FIQ source at a time is supported. This helps reduce interrupt latency as the interrupt service routine can be executed directly without determining the source of the interrupt. A context save is not required for servicing an FIQ since it has its own set of banked registers. This reduces the overhead of context switching.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Fast interrupt request」の詳細全文を読む



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