Leah Rowe 248192ad9a ifd/hppro3500: use truncated ME, enlarge BIOS size
i did:

ifdtool -f layout.txt ifd.bin

changed layout.txt to say this:

00000000:00000fff fd
00019000:007fffff bios
00001000:00018fff me
00fff000:00000fff gbe
00fff000:00000fff pd

then i did:

ifdtool -n layout.txt ifd.bin -O ifd.bin

this was done to the ifd for hp 3500 pro, based on
the 96KB size of the truncated me.bin via me_cleaner,
when downloading vendor files in lbmk.

it's the policy of libreboot that me.bin should always
be shrunk, and the BIOS region enlarged.

in the original HP 3500 PRO patch submitted, the ME region
was larger, with region boundaries like this:

00000000:00000fff fd
00400000:007fffff bios
00001000:003fffff me
00fff000:00000fff gbe
00fff000:00000fff pd

In the above example, you see that the BIOS region is 4MB.

In the new setup, BIOS is about 7.9MB.

Signed-off-by: Leah Rowe <leah@libreboot.org>
2025-07-06 04:34:14 +01:00
2021-05-18 13:56:12 +01:00
2025-05-26 13:33:56 +01:00

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.

S
Description
No description provided
Readme 26 MiB
Languages
C 72.7%
Shell 12%
Roff 11%
Python 2.6%
Awk 0.9%
Other 0.8%