Uefi (Unified Extensible Firmware Interface) Done by Nuriddinov Davron, student of group 424-21

UEFI (Unified Extensible Firmware Interface)

Done by Nuriddinov Davron, student of group 424-21

Plan: Introduction What does UEFI do? UEFI’s evolution from EFI Booting up: UEFI vs BIOS Advantages of UEFI UEFI disadvantages, or when to boot from BIOS UEFI accessibility Coreboot and UEFI Conclusion

Introduction Unified Extensible Firmware Interface (UEFI) is a specification for a software program that connects a computer's firmware to its operating system (OS). UEFI is expected to eventually replace basic input/output system (BIOS) but is compatible with it. The specification is most often pronounced by naming the letters U-E-F-I. UEFI functions via special firmware installed on a computer's motherboard. Like BIOS, UEFI is installed at the time of manufacturing and is the first program that runs when booting a computer. It checks to see which hardware components are attached, wakes up the components and hands them over to the OS. The new specification addresses several limitations of BIOS, including restrictions on hard disk partition size and the amount of time BIOS takes to perform its tasks. Most modern computer systems are equipped to support traditional BIOS, as well as UEFI, although Intel Corp. has stated its intention to phase out BIOS support in newer personal computers (PCs).

What does UEFI do? UEFI defines a new method by which OSes and platform firmware communicate, providing a lightweight BIOS alternative that uses only the information needed to launch the OS boot process. In addition, UEFI provides enhanced computer security features and supports most existing BIOS systems with backward compatibility. UEFI contains platform-related data tables and boot and runtime service calls used by the OS loader. Taken together, this information defines the required interfaces and structures that must be implemented for firmware and hardware devices to support UEFI. UEFI is programmable, enabling original equipment manufacturer developers to add applications and drivers and UEFI to function as a lightweight OS. In general, BIOS is considered a vestige from earlier computing, whereas UEFI is regarded as the wave of the future. However, for ease of understanding, some information technology users refer to the processes collectively as UEFI BIOS, despite their substantial differences.