Leah Rowe
2479633368
the last change was good, but this code, again, has to do these calculations 48,000 times a second. trivial on new computers. but now try it on a computer from 1992. we should try to make this as fast as possible :) older compilers especially don't optimise these checks. this patch shifts it to one subtraction and one unsigned comparison, rather than checking less than or greater than both. often used in... literally exactly this type of program. on a good compiler this will compile to an add, cmp and conditional jump. less readable, but the results (set 1 or 0) make it pretty obvious what it does, after a few seconds. Signed-off-by: Leah Rowe <leah@libreboot.org>
Libreboot
Documentation: libreboot.org
Support: #libreboot on
Libera IRC
Libreboot provides libre boot firmware on supported motherboards. It replaces proprietary vendor BIOS/UEFI implementations, by
- Using coreboot to initialize the hardware (e.g. memory controller, CPU, etc.) while minimizing unwanted functionality (e.g. backdoors such as the Intel Management Engine)
- ... which runs a payload such as SeaBIOS, GRUB, or U-Boot
- ... which loads your operating system's boot loader (BSD and Linux-based systems are supported).
Why use Libreboot, and what is coreboot?
A lot of users who use libre operating systems still use proprietary boot firmware, which often contain backdoors and bugs, hampering user freedom and right to repair.
coreboot provides libre boot firmware by initializing the hardware then running a payload. However, coreboot is notoriously difficult to configure and install for most non-technical users, requiring detailed technical knowledge of hardware.
Libreboot solves this by being a coreboot distribution (in the same way that Alpine Linux is a Linux distribution). It provides a fully automated build system that downloads and compiles pre-configured ROM images for supported motherboards, so end-users could easily fetch images to flash onto their devices.
Libreboot also produces documentation aimed at non-technical users and excellent user support via IRC.
Contribute
You can check bugs listed on the bug tracker.
You may use Codeberg pull requests to send patches with bug fixes or other improvements. This repository hosts the code for the main build system. The website lives in a separate repository.
Development is also done on the IRC channel.
License for this README
It's just a README file. It is released under Creative Commons Zero, version 1.0.