18c2ecf20Sopenharmony_ciChinese translated version of Documentation/core-api/irq/index.rst
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98c2ecf20Sopenharmony_ciMaintainer: Eric W. Biederman <ebiederman@xmission.com>
108c2ecf20Sopenharmony_ciChinese maintainer: Fu Wei <tekkamanninja@gmail.com>
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128c2ecf20Sopenharmony_ciDocumentation/core-api/irq/index.rst 的中文翻译
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178c2ecf20Sopenharmony_ci英文版维护者: Eric W. Biederman <ebiederman@xmission.com>
188c2ecf20Sopenharmony_ci中文版维护者: 傅炜 Fu Wei <tekkamanninja@gmail.com>
198c2ecf20Sopenharmony_ci中文版翻译者: 傅炜 Fu Wei <tekkamanninja@gmail.com>
208c2ecf20Sopenharmony_ci中文版校译者: 傅炜 Fu Wei <tekkamanninja@gmail.com>
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238c2ecf20Sopenharmony_ci以下为正文
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258c2ecf20Sopenharmony_ci何为 IRQ?
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278c2ecf20Sopenharmony_ci一个 IRQ 是来自某个设备的一个中断请求。目前,它们可以来自一个硬件引脚,
288c2ecf20Sopenharmony_ci或来自一个数据包。多个设备可能连接到同个硬件引脚,从而共享一个 IRQ。
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308c2ecf20Sopenharmony_ci一个 IRQ 编号是用于告知硬件中断源的内核标识。通常情况下,这是一个
318c2ecf20Sopenharmony_ci全局 irq_desc 数组的索引,但是除了在 linux/interrupt.h 中的实现,
328c2ecf20Sopenharmony_ci具体的细节是体系结构特定的。
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348c2ecf20Sopenharmony_ci一个 IRQ 编号是设备上某个可能的中断源的枚举。通常情况下,枚举的编号是
358c2ecf20Sopenharmony_ci该引脚在系统内中断控制器的所有输入引脚中的编号。对于 ISA 总线中的情况,
368c2ecf20Sopenharmony_ci枚举的是在两个 i8259 中断控制器中 16 个输入引脚。
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388c2ecf20Sopenharmony_ci架构可以对 IRQ 编号指定额外的含义,在硬件涉及任何手工配置的情况下,
398c2ecf20Sopenharmony_ci是被提倡的。ISA 的 IRQ 是一个分配这类额外含义的典型例子。
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