Linux设备驱动编程操作的相关内容

文章 2017-11-14 来自：开发者社区

深入浅出Linux设备驱动编程－－内存与I/O操作

对于提供了MMU（存储管理器，辅助操作系统进行内存管理，提供虚实地址转换等硬件支持）的处理器而言，Linux提供了复杂的存储管理系统，使得进程所能访问的内存达到4GB。进程的4GB内存空间被人为的分为两个部分——用户空间与内核空间。用户空间地址分布从0到3GB(PAGE_OFFSET，在0x86中它等于0xC0000000)，3GB到4GB为内核空间，如下图：内核空间中，从3G到...

文章 2017-11-01 来自：开发者社区

深入浅出Linux设备驱动编程－－设备的阻塞与非阻塞操作

宋宝华 [email]21cnbao@21cn.com[/email] yesky 5.设备的阻塞与非阻塞操作阻塞操作是指，在执行设备操作时，若不能获得资源，则进程挂起直到满足可操作的条件再进行操作。非阻塞操作的进程在不能进行设备操作时，并不挂起。被挂起的进程进入sleep状态，被从调度器的运行队列移走，直到等待的条件被满足。在Linux驱动程序中，我们可以使用等待队列（w...

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更新时间 2023-04-10 10:30:29

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