docs/zh_CN: add core-api irq concepts.rst translation
This patch translates Documentation/core-api/irq/concepts.rst into Chinese. Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/22babdd7e3fa5121360eff875d005ba5f4647e21.1618568135.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Documentation/translations/zh_CN/core-api/irq/concepts.rst
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Documentation/translations/zh_CN/core-api/irq/concepts.rst
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.. include:: ../../disclaimer-zh_CN.rst
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:Original: :doc:`../../../../core-api/irq/concepts`
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:Translator: Yanteng Si <siyanteng@loongson.cn>
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.. _cn_concepts.rst:
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===========
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什么是IRQ?
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===========
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IRQ (Interrupt ReQuest) 指来自设备的中断请求。
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目前,它们可以通过一个引脚或通过一个数据包进入。
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多个设备可以连接到同一个引脚,从而共享一个IRQ。
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IRQ编号是用来描述硬件中断源的内核标识符。通常它是一个到全局irq_desc数组的索引,
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但是除了在linux/interrupt.h中实现的之外,其它细节是体系结构特征相关的。
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IRQ编号是对机器上可能的中断源的枚举。通常枚举的是系统中所有中断控制器的输入引脚
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编号。在ISA(工业标准体系结构)的情况下所枚举的是两个i8259中断控制器的16个输入引脚。
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体系结构可以给IRQ号赋予额外的含义,在涉及到硬件手动配置的情况下,我们鼓励这样做。
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ISA IRQ是赋予这种额外含义的一个典型例子。
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