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Concept
Coreboot
Summary
coreboot, formerly known as LinuxBIOS, is a software project aimed at replacing proprietary firmware (BIOS or UEFI) found in most computers with a lightweight firmware designed to perform only the minimum number of tasks necessary to load and run a modern 32-bit or 64-bit operating system.
Since coreboot initializes the bare hardware, it must be ported to every chipset and motherboard that it supports. As a result, coreboot is available only for a limited number of hardware platforms and motherboard models.
One of the coreboot variants is Libreboot, a software distribution fully free of proprietary blobs, aimed at end users.
The coreboot project began with the goal of creating a BIOS that would start fast and handle errors intelligently. It is licensed under the terms of the GNU General Public License version 2 (GPLv2). Main contributors include LANL, SiS, AMD, Coresystems and Linux Networx, Inc, as well as motherboard vendors MSI, Gigabyte and Tyan, which offer coreboot alongside their standard BIOS or provide specifications of the hardware interfaces for some of their motherboards. Google partly sponsors the coreboot project. CME Group, a cluster of futures exchanges, began supporting the coreboot project in 2009.
Other than the first three models, all Chromebooks run coreboot. Code from Das U-Boot has been assimilated to enable support for processors based on the ARM instruction set.
In June 2019, Coreboot began to use the NSA software Ghidra for its reverse engineering efforts on firmware-specific problems following the release of the suite as free and open source software.
CPU architectures supported by coreboot include IA-32, x86-64, ARM, ARM64, MIPS and RISC-V. Supported system-on-a-chip (SOC) platforms include AMD Geode, starting with the Geode GX processor developed for the OLPC. Artec Group added Geode LX support for its ThinCan model DBE61; that code was adopted by AMD and further improved for the OLPC after it was upgraded to the Geode LX platform, and is further developed by the coreboot community to support other Geode variants.
Official source
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