Coreboot Now Has An Official GRUB2 Payload
Written by Michael Larabel in Coreboot on 19 November 2013 at 12:02 AM EST. 9 Comments
Coreboot's latest development code now features GRUB 2 as an alternative to SeaBIOS in its build system.

Compared to conventional BIOS systems, Coreboot features different payloads for which it supports after initializing the key hardware components. Besides having the well known SeaBIOS, there's been some GRUB2 support, the FILO bootloader, Etherboot, and TianoCore, among other instances. However, with the latest Coreboot Git activity, GRUB2 is now officially supported with its build system.

With this Git commit, GRUB2 has been added an official payload for the build system:
Since a long time GRUB 2 is a viable payload alternative to SeaBIOS and FILO. So make it easy for coreboot users to use GRUB 2 as a payload by integrating it into coreboot’s build system, so it can be selected in Kconfig.

As the last GRUB 2 release 2.00 is too old and has several bugs when used as a coreboot payload only allow to build GRUB 2 master until a new GRUB release is done. The downside is, that accidental breakage in GRUB’s upstream does not affect coreboot users.

Currently the GRUB 2 payload is built with the default modules which results in an uncompressed size of around 730 kB. Compressed it has a size of 340 kB, so it should be useable with 512 kB flash ROMs.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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