Gigabyte GA-H61M-S2PV

This page describes how to run coreboot on the Gigabyte GA-H61M-S2PV desktop from Gigabyte.

Flashing coreboot

Type Value
Socketed flash No
Model MX25L3206E
Size 4 MiB
In circuit flashing Yes
Package SOIC-8
Write protection No
Dual BIOS feature Yes
Internal flashing Yes

Internal programming

The main SPI flash can be accessed using flashrom. The DualBIOS backup flash chip is accessible as well using the dualbiosindex programmer parameter. Since the flash recovery mechanism works even with coreboot installed on the main flash chip (it still restores the vendor UEFI though), it is useful to leave the backup chip untouched.

Notes about the original firmware

The original IFD defines the BIOS region as the whole flash chip. While this is not an issue if flashing a complete image, it confuses flashrom and trashes the flash chip’s contents when using the –ifd option. However, this can be easily fixed by reading the IFD with flashrom, editing the correct values into it with ifdtool and then reflashing it.

Create a layout.txt with the following contents:

00000000:00000fff fd
00180000:003fffff bios
00001000:0017ffff me

After that, simply run:

sudo flashrom -p internal --ifd -i fd -r ifd.rom
ifdtool -n layout.txt ifd.rom
sudo flashrom -p internal --ifd -i fd -w ifd.rom.new

After flashing, power cycle the computer to ensure the new IFD is being used. If only a reboot is done, the old IFD layout is still seen by flashrom, even if the IFD on the flash chip is correctly defining the new region layout.

Technology

Northbridge Intel Sandy Bridge-specific documentation
Southbridge bd82x6x
CPU model_206ax
SuperIO ITE IT8728F
EC None
Coprocessor Intel ME