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Technical specification for firmware architecture
Firmware Interface or UEFI is a specification for the firmware architecture of a computing platform. When a computer is powered on, the UEFI implementation typically
UEFI
Computer data storage partitioning standard
solid-state drive. It is part of the Unified Extensible Firmware Interface (UEFI) standard. It has several advantages over master boot record (MBR) partition
GUID_Partition_Table
Partition used by Unified Extensible Firmware Interface
computers that have the Unified Extensible Firmware Interface (UEFI). When a computer is booted, UEFI firmware loads files stored on the ESP to start operating
EFI_system_partition
Reference software implementation for UEFI
TianoCore EDK II (formerly Tiano) is the reference implementation of UEFI by Intel. EDK is the abbreviation for EFI Development Kit and is developed by
TianoCore_EDK_II
Non-profit trade organization based in Oregon
UEFI Forum, Inc. is an alliance between technology companies to coordinate the development of the UEFI specifications. The board of directors includes
UEFI_Forum
Specification that describes parts of firmware
Retrieved 2011-08-11. "UEFI Forum Releases the UEFI 2.11 Specification and the PI 1.9 Specification To Streamline User Implementations". UEFI Forum. December
UEFI_Platform_Initialization
Boot loader used in Windows NT-based products
and Windows Server 2008. It is the first program launched by the BIOS or UEFI of the computer and is responsible for loading the rest of Windows. It replaced
Windows_Boot_Manager
Computer firmware interface standard
hardware abstraction interfaces between the device's firmware (e.g. BIOS, UEFI), the computer hardware components, and the operating systems. Internally
ACPI
Trusted execution environment subsystem that runs on AMD microprocessors
Berlin-based security group discovered the off-chip firmware in ordinary UEFI image files (the code that boots up the operating system), which meant that
AMD Platform Security Processor
AMD_Platform_Security_Processor
Standard for booting from a server
2015[update] it forms part of the Unified Extensible Firmware Interface (UEFI) standard. In modern data centers, PXE is the most frequent choice for operating
PXE_boot
Firmware for hardware initialization and OS runtime services
Extensible Firmware Interface (UEFI) is a successor to the legacy PC BIOS, aiming to address its technical limitations. UEFI firmware may include legacy
BIOS
Computing specification
operating system. In the UEFI Shell, the SmbiosView command can retrieve and display the SMBIOS data. One can often enter the UEFI shell by entering the
System_Management_BIOS
Linux software that manages firmware updates
Unified Extensible Firmware Interface (UEFI) firmware on supported devices via EFI System Resource Table (ESRT) and UEFI Capsule, which is supported in Linux
Fwupd
Linux flash drive creation software
YUMI (Your USB Multiboot Installer) UEFI (archived) Developer Pendrivelinux Preview release 0.0.4.5 / 5 March 2022; 4 years ago (2022-03-05) Written in
Universal_USB_Installer
UEFI malware
MoonBounce is a UEFI firmware-based rootkit. It is linked to the Chinese APT41 hacker group. MoonBounce was discovered by the researchers at Kaspersky
MoonBounce
Computer memory diagnostics software
rewritten for UEFI booting (initially with fallback to BIOS booting on non-UEFI systems), allowing for secure boot approval and mouse support. All UEFI versions
MemTest86
Executable file format
executable code on 32-bit and 64-bit Windows operating systems, as well as in UEFI environments. It is used for native executables (.exe, .com), dynamic link
Portable_Executable
Battery-backed memory component
Today's UEFI motherboards use NVRAM to store configuration data (NVRAM is a portion of the UEFI flash ROM), but by many OEMs' design, the UEFI settings
Nonvolatile_BIOS_memory
Chinese computer technology company
Software (Chinese: 系微公司; pinyin: Xìwēi Gōngsī) is a company that specializes in UEFI system firmware and engineering support services, primarily for OEM and ODM
Insyde_Software
International hardware and software company
previously included AMIBIOS (a BIOS), Aptio (a successor to AMIBIOS8 based on the UEFI standard), diagnostic software, AMI EC (embedded controller firmware), MG-Series
American_Megatrends
Coreboot distribution with no proprietary code
project based on coreboot, aimed at replacing some of the proprietary BIOS or UEFI firmware on supported x86-64 and AArch64 computers. Libreboot performs the
Libreboot
Multi-stage initialisation process of operating system
PC–compatible personal computers (PCs), this firmware/program is either a BIOS or a UEFI monitor, and is stored in the mainboard. In embedded Linux systems, this
Booting_process_of_Linux
Firmware to add BIOS support for a device
format is set to “UEFI Compatible” in the UEFI Setup, the Driver Execution Environment (DXE) stage will prioritize loading the UEFI Option ROM if it is
Option_ROM
Boot manager for UEFI systems
rEFInd is a boot manager for UEFI and EFI-based machines. It can be used to boot multiple operating systems that are installed on a single non-volatile
REFInd
Process of starting a computer
(Intel Macs and newer PCs) use UEFI. Unlike BIOS, UEFI (not Legacy boot via CSM) does not rely on boot sectors, UEFI system loads the boot loader (EFI
Booting
Software responsible for starting the computer
the start of the sector. Examples of first-stage bootloaders include BIOS, UEFI, coreboot, Libreboot, and Das U-Boot. It initializes hardware devices such
Bootloader
Boot loader package
for UEFI-based computers (BIOS not supported). CloverEFI – Macintosh-style graphical boot manager for BIOS and UEFI-based computers. It emulates UEFI with
GNU_GRUB
American multinational technology company
Mu, an open source release of the Unified Extensible Firmware Interface (UEFI) core used in Microsoft Surface and Hyper-V products. The project promotes
Microsoft
2021 Microsoft operating system version
security considerations. The operating system requires features such as UEFI, Secure Boot, and Trusted Platform Module (TPM) version 2.0. Official support
Windows_11
Open-source computer firmware
system. It is designed to replace proprietary firmware (traditional BIOS or UEFI implementations) by performing the minimal tasks required to start a modern
Coreboot
Operating system based on OS/2
Windows and DOS, as well as supporting 16-bit Windows and DOS software on UEFI systems that do not have a traditional BIOS. ArcaOS includes Odin, based
ArcaOS
American writer of science fiction
over 1000 patents worldwide, and is one of the primary architects of the UEFI standard. He has co-authored two books and six papers about the standard
M._A._Rothman
64-bit extension of x86 architecture
Long mode 64-bit mode 64-bit OS, 64-bit UEFI firmware, or the previous two interacting via a 64-bit firmware's UEFI interface 64-bit 64 8, 16, 32, 64 16
X86-64
UEFI malware
BlackLotus is a UEFI bootkit malware discovered publicly in 2022 that bypasses Microsoft's secure boot on fully up-to-date Windows systems. BlackLotus
BlackLotus
Stage 1 and stage 2 bootloader for Apple devices
bridgeOS loads the UEFI firmware; UEFI firmware starts the main Intel processor and completes the Power-On Self Test process. The UEFI firmware loads boot
IBoot
BIOS interrupt call
replaced by the EFI UGA protocol. In widely used UEFI 2.x systems, the INT 10H and the VBE are replaced by the UEFI GOP. The list is incomplete; use Ralf Brown's
INT_10H
Process performed by firmware or software routines
are handled by the BIOS or UEFI. In IBM PC compatible computers, the main duties of POST are handled by the BIOS or UEFI, which may hand some of these
Power-on_self-test
Irish computer programmer
Award from the Free Software Foundation (FSF) for his work on Secure Boot, UEFI, and the Linux kernel. Garrett was born in Galway, Ireland, and has a PhD
Matthew_Garrett
BIOS interrupt call for disk access
come with both BIOS INT 13h and UEFI functionality that provides the same services and more, with the exception of UEFI Class 3 that completely removes
INT_13H
American computer company
motherboard for the people facing the issue. Framework Laptop 13 uses proprietary UEFI firmware, InsydeH2O by Insyde Software, and an open-source embedded controller
Framework_Computer
Data storage portion for Microsoft Windows
area at the end of the disk which is not allocated to any partition. The UEFI specification does not allow hidden sectors on GPT-formatted disks. Microsoft
Microsoft_Reserved_Partition
Partition used by GNU GRUB to boot GPT partition on BIOS
gptfdisk project on sourceforge.net. Retrieved 2023-05-03. See https://uefi.org/specs/UEFI/2.10/05_GUID_Partition_Table_Format.html, "GPT partitions should
BIOS_boot_partition
Extension of the BIOS or boot firmware
(PBA) or power-on authentication (POA) serves as an extension of the BIOS, UEFI or boot firmware and guarantees a secure, tamper-proof environment external
Pre-boot_authentication
Software program
UEFITool is a software program for reading and modifying EEPROM images with UEFI firmware. It is written in C++ using the Qt library. Features include the
UEFITool
UEFI boot manager
to GNU GRUB for systems using the Unified Extensible Firmware Interface (UEFI). The boot loader automatically detected bootable images (including operating
Systemd-boot
Freeware memory scanner and debugger
Object Pascal, and C (C is used for the Driver, DBVM And DBVM UEFI), Assembly (DBVM UEFI And DBVM) Operating system Windows, macOS, Linux (Wine, Server/Client
Cheat_Engine
Mechanism to wake up computers via a network
motherboard's BIOS/UEFI setup utility, although on some systems, such as Apple computers, it is enabled by default. On older systems the BIOS/UEFI setting may
Wake-on-LAN
Computing standard based on MIPS architecture
UEFI, the ARC firmware also included support for FAT, boot variables, C-calling interface. It did not include the same level of extensibility as UEFI
ARC_(specification)
Act of installing multiple operating systems on a single computer
Extensible Firmware Interface aka UEFI. Unlike BIOS aka Legacy, UEFI does not rely on a partition's boot sector, the PC's UEFI firmware loads a small boot loader
Multi-booting
Free and open-source operating system
DragonFly BSD DragonFly BSD 6.2.1 UEFI boot loader Developer Matthew Dillon OS family Unix-like (BSD) Working state Current Source model Open source Initial
DragonFly_BSD
Main printed circuit board used for a computing device
UEFISecureBoot.ConnectedStandby ... Platforms shall be UEFI Class Three (see UEFI Industry Group, Evaluating UEFI using Commercially Available Platforms and Solutions
Motherboard
Embedded operating system by Apple
executes the bridgeOS kernel, then the bridgeOS kernel passes off to the UEFI firmware. bridgeOS is based on Apple's watchOS. "10.15.4 Supplemental Update
BridgeOS
Sector of persistent data storage device
the EFI system partition. Additionally, the UEFI specification contains Secure Boot, which requires the UEFI code to be digitally signed. In case a boot
Boot_sector
2012 Microsoft operating system version
devices with Windows 8 preinstalled, must implement and enable UEFI Class 3, including UEFI Secure Boot, to meet "Designed for Windows 8" validation, but
Windows_8
Releases of Debian GNU/Linux, a computer operating system
UEFI firmware. "UEFI". The Debian Project. Archived from the original on 14 November 2019. Retrieved 1 January 2020. The initial support to make UEFI
Debian release version history
Debian_release_version_history
UEFI malware
BootKitty is a bootkit ELF malware that hijacks the UEFI on Linux systems by using a malicious EFI booter and is the first ever bootkit for Linux systems
BootKitty
The RISC-V ecosystem includes systems that boot with UEFI, handle power management with ACPI and run a variety of operating systems including Linux distributions
RISC-V_ecosystem
Type of standardized secure cryptoprocessors
ensuring integrity. For example, the Unified Extensible Firmware Interface (UEFI) can use TPM to form a root of trust: The TPM contains several Platform Configuration
Trusted_Platform_Module
Backup and disaster recovery software
system with Windows and Secure Boot enabled. The issue is caused by a revoked UEFI certificate in the underlying OS used by Redo Rescue. As the most recent
Redo_Rescue
Free software firmware project
Execution Environment (DXE) modules in Unified Extensible Firmware Interface (UEFI) firmware with the Linux kernel. LinuxBoot must run on top of hardware initialisation
LinuxBoot
Computers derived from the IBM PC
Lenovo in 2005. However, Lenovo only got a small portion of IBM’s BIOS and UEFI intellectual property after the IBM PC acquisition and after the System x
IBM_PC_compatible
Interface used for connecting storage devices
emulated. UEFI An open source NVMe driver for UEFI called NvmExpressDxe is available as part of EDKII, the open-source reference implementation of UEFI. The
NVM_Express
Software means of causing computer hardware damage
root user of a system to completely brick a system with a non-conforming UEFI implementation (specifically some MSi laptops) by using the rm command to
Killer_poke
Software published only in binary code
was eventually adopted by many industry leading hardware manufacturers as UEFI (Unified Extensible Firmware Interface). The EDK (EFI Development Kit) was
Binary_blob
Slovak internet security company
ESET became the first security company in the world to implement a UEFI Scanner. UEFI is a firmware that is loaded into a computer's memory during the startup
ESET
Intel CPU socket
they have different socket notches. LGA 1155 also marked the beginning of UEFI secure boot with support in some later boards. The four holes for fastening
LGA_1155
Major release of Windows Server, released in 2021
Defender Antivirus) Credential Guard Hypervisor-protected Code Integrity (HVCI) UEFI Secure Boot Protection against malicious attacks via the DMA path DNS over
Windows_Server_2022
Linux distribution
using Ventoy to create a bootable USB device. SecureBoot must be disabled in UEFI on the target machine, as Nobara does not support it. "Changelog – Page 4
Nobara_(operating_system)
Eleventh major version of Windows Server, released in 2024
second throughput, or NIC card with a minimum bandwidth of 1 Gbit Firmware UEFI 2.3.1c-based system and firmware that supports secure boot (only required
Windows_Server_2025
Open-source x86 virtualization application
provides graphics support through a custom virtual graphics-card that is VBE or UEFI GOP compatible. The Guest Additions for Windows, Linux, Solaris, OpenSolaris
VirtualBox
2006 Microsoft operating system version
of UEFI support to Windows; support for UEFI on 64-bit platforms was postponed until Vista Service Pack 1 and Windows Server 2008 and 32-bit UEFI would
Windows_Vista
Very basic transfer protocol over UDP
decided to widely support PXE within the new UEFI specification extending the TFTP support to all EFI/UEFI environments. TFTP provides no builtin security
Trivial File Transfer Protocol
Trivial_File_Transfer_Protocol
Linux bootloader
BOOTMGR - current Windows bootloader rEFInd - alternative boot loader for UEFI-based computers Comparison of boot loaders "Release 12.5.2". 22 July 2026
Limine_(bootloader)
Product activation mechanism for Microsoft Windows
product key is added and locked to the machine's firmware (Legacy BIOS or UEFI) before mass distribution. SLP product keys cannot be moved to other machines
System Locked Pre-installation
System_Locked_Pre-installation
Video board software standard
replaced by the EFI UGA protocol. In widely used UEFI 2.x systems, the INT 10H and the VBE are replaced by the UEFI GOP. Initially, the need for standardization
VESA_BIOS_Extensions
Mid-weight family of operating systems
10, kernel updates, bug fixes, and language updates. UEFI Manager, a new app for managing UEFI settings. Many new applications in the MX 'test' repository
MX_Linux
One of the two chips in the core logic chipset architecture on a PC motherboard
input/output (I/O) functions, including USB, audio, firmware (e.g., BIOS or UEFI), storage interfaces such as SATA, NVMe, and legacy PATA, as well as buses
Southbridge_(computing)
Executable file format
on some Unix-like systems, on Microsoft Windows (Portable Executable), in UEFI environments and in some embedded development systems. The original Unix
COFF
Computer graphics standard from 1987
for background. For this reason, most modern UEFI boot loaders choose not to utilise VGA text mode; UEFI and any operating systems designed for it tend
VGA_text_mode
Variable-width encoding of Unicode, using one or two 16-bit code units
"\uD834\uDD1E" instead of "\U0001D11E" for U+1D11E. UEFI uses UTF-16 to encode strings by default. Since at least UEFI 2.4, it can use ASCII to encode ASCII-only
UTF-16
2015 Microsoft operating system version
longer required. As with Windows 8, all certified devices must ship with UEFI Secure Boot enabled by default. Unlike Windows 8, OEMs are no longer required
Windows_10
CPU microarchitecture by Intel
applying only to the CPU, RAM, and integrated graphics on Skylake. Through beta UEFI firmware updates, some motherboard vendors, such as ASRock (which prominently
Skylake_(microarchitecture)
Computer interface standard
monitoring capabilities independently of the host system's CPU, firmware (BIOS or UEFI) and operating system. IPMI defines a set of interfaces used by system administrators
Intelligent Platform Management Interface
Intelligent_Platform_Management_Interface
Calling conventions used in x86 architecture programming
The Microsoft x64 calling convention is followed on Windows and pre-boot UEFI (for long mode on x86-64). The first four arguments are placed onto the registers
X86_calling_conventions
Unix-like, desktop-oriented operating system
installation is needed in order to install UEFI support as it requires the creation of a small FAT partition. The current UEFI does not support secure boot. Screenshot
TrueOS
Internal loudspeaker built into some (older) IBM PC-compatible computers
pause; three beeps; pause; repeat". These patterns are specific to the BIOS/UEFI manufacturer and are usually documented in the technical manual of the motherboard
PC_speaker
Piece of read-only-memory used for booting a computer system
open-source software bootloaders like Das U-Boot and Coreboot and Barebox. UEFI serves as a boot ROM on systems such as newer IBM PC compatible computers
Boot_ROM
Linux distribution
Iron Penguin Edition) 20160514 May 14, 2016 (Live DVD - Choice Edition; UEFI, ZFSOnLinux, and writable file systems using AUFS) 20160704 July 4, 2016
Gentoo_Linux
Windows specification for power management
UEFISecureBoot.ConnectedStandby ... Platforms shall be UEFI Class Three (see UEFI Industry Group, Evaluating UEFI using Commercially Available Platforms and Solutions
Modern_Standby
Solid state storage device
interleaving of standard RAM is not affected by the presence of ULLtraDIMMs. UEFI/BIOS updates are required to properly recognize an ULLtraDIMM in the system
ULLtraDIMM
Data recovery software
(doesn't use OS of host PC) runnable from DOS Platform Any PC with BIOS or UEFI+CSM Size 0.259 MB executable, 1.40 MB bootable disk image with FreeDOS OS
SpinRite
Boot for Android devices
partition table. This specification is part of the UEFI specification, but does not depend on UEFI firmware. coreboot Booting process of Linux Booting
Booting process of Android devices
Booting_process_of_Android_devices
Linux operating system
experimental UEFI support is provided for USB flash drive rather than DVD media. 32-bit UEFI firmware can only boot up the 32-bit kernel, while 64-bit UEFI firmware
Knoppix
Device connecting the CPU and memory to PCI Express switch fabric
Retrieved 2016-04-12. "14. Protocols — PCI Bus Support — UEFI Specification 2.10 documentation". uefi.org. Retrieved 2024-11-16. "Choosing the Right Programmable
Root_complex
Free and open-source Unix-like operating system
32-bit binaries, and up to 256 CPUs Enhanced support for ARMv7-A, including UEFI bootloader, big.LITTLE, kernel mode setting for Allwinner and other SoCs
NetBSD
Operating mode for x86 CPUs
instructions to enter it. With a computer running UEFI, the UEFI firmware (except CSM and legacy Option ROM), any UEFI boot loader, and the operating system kernel
Long_mode
128-bit number used to identify information in computer systems
rationale for variant 1 (DCE) versions 6 and 7, standardized in RFC 9562. UEFI and ACPI are examples that use GUID. Birthday attack Object identifier (OID)
Universally_unique_identifier
Non-Apple computer running macOS
deploying Mac OS X v10.7 image on a flash drive, and booting from it via XPC UEFI Bootloader (See DUET below). After some changes were made to the Chameleon
Hackintosh
Linux distribution
compatible with UEFI Secure Boot. UEFI Secure Boot is used to protect the operating system installed on the computer's hard drive. As of June 2020, UEFI Secure
Lightweight_Portable_Security
Graphics processing unit brand
DirectX 9-based games. Intel Arc requires a UEFI BIOS with resizable BAR support for optimal performance. UEFI Class 1 and Class 2 BIOS are not supported
Intel_Arc
UEFI
UEFI
UEFI
UEFI
Boy/Male
English
Like God
Boy/Male
Australian, Czechoslovakian, Danish, French, German, Hebrew, Polish, Slovenia, Swedish
Jehovah Increases; He will Enlarge; God will Add Another
Girl/Female
Arabic, Muslim
Wealthy; Pure Gold
Girl/Female
Tamil
Perfect, Blameless
Boy/Male
American, Australian, French, Latin
Messenger
Boy/Male
Italian American
From the angel.
Boy/Male
Christian & English(British/American/Australian)
Earthy
Boy/Male
Arabic
Beautiful
Girl/Female
Hindu, Indian, Traditional
Goddess Durga
Boy/Male
Hindu, Indian, Punjabi, Sikh
The Shiny One
UEFI
UEFI
UEFI
UEFI
UEFI