Advanced Configuration and Power Management Interface(ACPI)是由Intel,Microsoft等厂家订的一套Spec,规范了OS,APP对于电源的管理.ACPI涉及很广,这里仅涉及一些System Power Management, Device Power Management. System PM:S0: working modeS1: CPU停止工作, CPU,RAM继续供电,cache flush到Ram,Device若无必要则处…
如对Linux用户态驱动程序开发有兴趣,请阅读本文,否则请飘过. User-Space Device Drivers in Linux: A First Look | 初识Linux用户态设备驱动程序 User-Space Device Drivers in Linux: A First Look Mats Liljegren Senior Software Architect Device drivers in Linux are traditionally run in kernel spa…
前文初步介绍了Linux用户态设备驱动,本文将介绍一个典型的案例.Again, 如对Linux用户态设备驱动程序开发感兴趣,请阅读本文,否则请飘过. Device Drivers in User Space: A Case for Network Device Driver | 用户态设备驱动:以网卡驱动为例 Hemant Agrawal and Ravi Malhotra, Member, IACSIT Abstract -- Traditionally device drivers spec…
BACKGROUND INFORMATION Embodiments of the present invention are directed to optical links and, more particularly, to optical links which may save power when the optical link is unplugged and maintain eye safety standards. Most optical links to date a…
A method for operating a memory module device. The method can include transferring a chip select, command, and address information from a host memory controller. The host memory controller can be coupled to a memory interface device, which can be cou…
Types of Device Drivers Windows可能会有User-mode的驱动,但是我们只关注Kernel-Mode的驱动. WDM Drivers WDM是一种驱动模型,是比较常用的驱动模型. WDM可以分为以下几类: Bus Drivers 负责检测到连接到该总线的设备的与PnP/Power相关的事件,并且通知IO Manager, PnP Manager, Power Manager. Function Drivers 负责某一具体设备的driver,是狭义上的driver…
“Do you pine for the nice days of Minix-1.1, when men were men and wrote their own device drivers?” Linus Torvalds Pre-requisites In order to develop Linux device drivers, it is necessary to have an understanding of the following: C programming. Some…
来源:http://www.drdobbs.com/cpp/accessing-device-drivers-from-c/184416423/ Device Drivers are written largely in C or C++. No explicit support for Device Driver communication is included in the current .NET framework. David implements support with C#…
0.ABSTRACT (1)non-volatile memory——low standby power DRAM——high performance and better active power (2)we: present a runtime-adaptive method of DRAM decay——reduce DRAM refresh energy (largestandby power due to refresh) present two methods——DRAM bypas…
写一份赏心悦目的工程文档,是很困难的事情.若想写得完善,不仅得用对工具(use the right tools),注重文笔,还得投入大把时间,真心是一件难度颇高的事情.但,若是真写好了,也是善莫大焉:既可让人明白「为何如此设计」,即「知其然更知其所以然」:也能剥离一些琐碎的细节,让更多没那么多时间与精力.或者背景知识不足的朋友,对核心方法和思路,多一点理解,即,给人提供一种「纲举目张提纲挈领抽丝剥茧」的可能性. 机缘巧合,俺今天就决定抛砖引玉,写一篇不那么好的工程文档.也期望对本文话题感兴趣的朋…
ch03.字符设备驱动程序 编写驱动程序的第一步就是定义驱动程序为用户程序提供的能力(机制).接下来以scull(“Simple Character Utility for Loading Localities”区域装载的简单字符工具,scull是一个操作内存区域的字符设备驱动程序,这片内存区域就相当于一个设备)为例说明. 主设备号和次设备号 对字符设备的访问时通过文件系统内的设备名称进行的.这些名称被称为特殊文件.设备文件或者简单称之为文件系统树的节点.它们通常位于/dev目录,字符设备驱动程…
写一份赏心悦目的工程文档,是很困难的事情.若想写得完善,不仅得用对工具(use the right tools),注重文笔,还得投入大把时间,真心是一件难度颇高的事情.但,若是真写好了,也是善莫大焉:既可让人明白「为何如此设计」,即「知其然更知其所以然」:也能剥离一些琐碎的细节,让更多没那么多时间与精力.或者背景知识不足的朋友,对核心方法和思路,多一点理解,即,给人提供一种「纲举目张提纲挈领抽丝剥茧」的可能性. 机缘巧合,俺今天就决定抛砖引玉,写一篇不那么好的工程文档.也期望对本文话题感兴趣的朋…
Also, be aware that hibernation (suspend to disk or S4 sleep) is not supported on hackintosh. You should disable it: sudo rm /var/vm/sleepimage sudo mkdir /var/vm/sleepimage Always check your hibernatemode after updates and disable it. System updates…
