18c2ecf20Sopenharmony_ciChinese translated version of Documentation/core-api/irq/index.rst 28c2ecf20Sopenharmony_ci 38c2ecf20Sopenharmony_ciIf you have any comment or update to the content, please contact the 48c2ecf20Sopenharmony_cioriginal document maintainer directly. However, if you have a problem 58c2ecf20Sopenharmony_cicommunicating in English you can also ask the Chinese maintainer for 68c2ecf20Sopenharmony_cihelp. Contact the Chinese maintainer if this translation is outdated 78c2ecf20Sopenharmony_cior if there is a problem with the translation. 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ciMaintainer: Eric W. Biederman <ebiederman@xmission.com> 108c2ecf20Sopenharmony_ciChinese maintainer: Fu Wei <tekkamanninja@gmail.com> 118c2ecf20Sopenharmony_ci--------------------------------------------------------------------- 128c2ecf20Sopenharmony_ciDocumentation/core-api/irq/index.rst 的中文翻译 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci如果想评论或更新本文的内容,请直接联系原文档的维护者。如果你使用英文 158c2ecf20Sopenharmony_ci交流有困难的话,也可以向中文版维护者求助。如果本翻译更新不及时或者翻 168c2ecf20Sopenharmony_ci译存在问题,请联系中文版维护者。 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> 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci以下为正文 248c2ecf20Sopenharmony_ci--------------------------------------------------------------------- 258c2ecf20Sopenharmony_ci何为 IRQ? 268c2ecf20Sopenharmony_ci 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。 298c2ecf20Sopenharmony_ci 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。 338c2ecf20Sopenharmony_ci 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。 378c2ecf20Sopenharmony_ci 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。 40