UEFI Specification 2.8B版本详解

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资源摘要信息:"UEFI(统一可扩展固件接口)Spec 2.8B May 2020.zip" 知识点: 1. UEFI的定义和作用: UEFI(Unified Extensible Firmware Interface)是一种个人计算机固件的规范,用于替代传统的BIOS(基本输入输出系统)。UEFI提供了比传统BIOS更现代的软件接口,它具有更强的扩展性,安全性,与操作系统的兼容性更佳。UEFI规范定义了操作系统与系统固件之间的接口标准,使得硬件初始化、启动和运行更加高效和灵活。 2. UEFI规范的版本历史: UEFI自2006年开始被提出,之后不断更新,以支持新硬件和软件的需求。UEFI 2.8B是2020年5月发布的版本,规范的更新旨在解决一些问题,增加新的功能,或是对现有功能进行扩展和优化。 3. UEFI Spec 2.8B May 2020.pdf文件内容预览: - UEFI规范文档通常包含大量技术细节,描述了UEFI固件的实现方式、协议定义、启动过程、安全性要求以及与硬件交互的接口信息。 - 规范文档会详细说明UEFI启动管理器(Boot Manager)的配置和操作,以及如何与计算机的其他组件如操作系统,驱动程序等进行交互。 - UEFI固件的可编程性(Programmability)允许开发人员在固件层面上编写程序,如安全启动机制、固件级别的管理工具等。 - 规范还包括了对各种启动模式的支持,例如安全启动(Secure Boot)以及兼容传统BIOS的Legacy模式,确保了向后兼容性。 - UEFI还定义了数据传输的标准方式,例如通过UEFI变量存储(Variable Services)来保存和获取固件的设置信息。 4. UEFI与传统BIOS的区别: - UEFI提供了基于图形的用户界面,相较于BIOS的文本界面,更加直观易用。 - UEFI支持大容量硬盘启动,解决了BIOS的512字节限制问题。 - UEFI能够提供更为强大的硬件自检功能,提高了系统的启动速度和效率。 - UEFI具有模块化的驱动程序支持,可以实现更为丰富的硬件兼容性。 - 安全性方面,UEFI支持安全启动机制,有助于预防恶意软件对启动过程的干扰。 5. UEFI规范在IT行业的应用和重要性: UEFI规范为硬件和软件开发者提供了一个共同遵循的标准,确保了不同厂商硬件之间的兼容性。随着硬件技术的发展和安全需求的提升,UEFI规范在计算机启动和初始化过程中的作用越来越重要。开发者可以利用UEFI提供的接口开发新功能,比如操作系统安装、系统恢复、硬件诊断工具等。同时,安全特性如Secure Boot也使得UEFI成为现代计算机安全架构的关键组成部分。 6. UEFI固件的更新和维护: - 固件更新通常由计算机或主板的制造商提供,用户可以通过特定的软件工具进行固件的更新。 - 固件更新需要谨慎操作,错误的更新可能导致设备无法启动。 - UEFI固件中包含了许多设置选项,系统管理员或高级用户可以通过UEFI设置界面调整系统启动参数,实现特定的功能和优化。 了解和掌握UEFI规范,对于计算机硬件和软件的开发者、系统管理员以及IT维护人员来说,都是非常重要的。它不仅能够帮助他们更好地理解和开发与硬件相关的软件,而且也能在硬件维护和故障排除中发挥关键作用。UEFI Spec 2.8B May 2020.pdf作为UEFI规范的一个版本,为相关专业人员提供了详细的技术信息和参考标准。
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This Unified Extensible Firmware Interface (hereafter known as UEFI) Specification describes an interface between the operating system (OS) and the platform firmware. UEFI was preceded by the Extensible Firmware Interface Specification 1.10 (EFI). As a result, some code and certain protocol names retain the EFI designation. Unless otherwise noted, EFI designations in this specification may be assumed to be part of UEFI. The interface is in the form of data tables that contain platform-related information, and boot and runtime service calls that are available to the OS loader and the OS. Together, these provide a standard environment for booting an OS. This specification is designed as a pure interface specification. As such, the specification defines the set of interfaces and structures that platform firmware must implement. Similarly, the specification defines the set of interfaces and structures that the OS may use in booting. How either the firmware developer chooses to implement the required elements or the OS developer chooses to make use of those interfaces and structures is an implementation decision left for the developer. The intent of this specification is to define a way for the OS and platform firmware to communicate only information necessary to support the OS boot process. This is accomplished through a formal and complete abstract specification of the software-visible interface presented to the OS by the platform and firmware. Using this formal definition, a shrink-wrap OS intended to run on platforms compatible with supported processor specifications will be able to boot on a variety of system designs without further platform or OS customization. The definition will also allow for platform innovation to introduce new features and functionality that enhance platform capability without requiring new code to be written in the OS boot sequence. Furthermore, an abstract specification opens a route to replace legacy devices and firmware code over time. New device types and associated code can provide equivalent functionality through the same defined abstract interface, again without impact on the OS boot support code. The specification is applicable to a full range of hardware platforms from mobile systems to servers. The specification provides a core set of services along with a selection of protocol interfaces. The selection of protocol interfaces can evolve over time to be optimized for various platform market segments. At the same time, the specification allows maximum extensibility and customization abilities for OEMs to allow differentiation. In this, the purpose of UEFI is to define an evolutionary path from the traditional “PC-AT”- style boot world into a legacy-API free environment.
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