Difference between revisions of "Minnowboard:MinnowMaxCoreboot"
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cd .. | cd .. | ||
=== TXE and SPI descriptor === | === TXE and SPI descriptor === | ||
− | + | First build a coreboot utility called ifdtool that's located within the coreboot directory | |
cd coreboot/util/ifdtool | cd coreboot/util/ifdtool |
Revision as of 15:25, 21 January 2015
This page gives a step by step guide to building coreboot for the Minnowboard Max.
Contents
Requirements
- gcc
- git
- make
- ncurses-dev
- flex
- bison
Get sources and tools
NOTE: for simplicity, put all downloads and items extracted into the same directory.
Coreboot
git clone http://review.coreboot.org/p/coreboot cd coreboot git submodule update --init --checkout git checkout b9a0809faeeef67e46cda17cf8f7a839c6fe614c
- Download config
FSP
- Download FSP archive
- extract from archive
- follow instructions in Readme_Extract to extract FSP
Binary Configuration Tool
- Download BCT archive
- extract archive from archive
- extract from archive
Setup
FSP
cd bct ./bct --bin ../BAY_TRAIL_FSP_KIT/FSP/BAYTRAIL_FSP_GOLD_002_10-JANUARY-2014.fd --absf ../coreboot/src/vendorcode/intel/fsp/baytrail/absf/minnowmax_2gb.absf --bout ../minnowboard-max.fsp
- If you have a single core Minnowboard Max, change minnowmax_2gb.absf to minnowmax_1gb.absf
- DO NOT USE THE GUI. THE GUI DOES NOT WORK ON ALL LINUX DISTROS AND IS NOT NECESSARY FOR THIS.
cd ..
TXE and SPI descriptor
First build a coreboot utility called ifdtool that's located within the coreboot directory
cd coreboot/util/ifdtool make cd ../../../
Download the original firmware binary here
unzip -d maxfirmware 2014-WW42.4-MinnowBoardMax.73-64-bit.bin_Release.zip cd maxfirmware
Run ifdtool to extract the TXE and SPI descriptor from the firmware image
../coreboot/util/ifdtool/ifdtool -x MNW2MAX1.X64.0073.R02.1409160934.bin
You should now have 4 files starting with flashregion_ Link flashregion_0_flashdescriptor.bin to descriptor.bin
ln -s flashregion_0_flashdescriptor.bin descriptor.bin
Link flashregion_1_bios.bin to txe.bin
ln -s flashregion_1_bios.bin txe.bin
- Ignore the other two flashregion files as they won't be used
Coreboot
cd coreboot
- in src/soc/intel/fsp_baytrail/Kconfig line 127, change 'string' to 'string "ME PATH"'
make menuconfig
- load provided config
- save config to .config
- If you have a single core Minnowboard Max, change "Mainboard" -> "Memory SKU to build" to 1GB
- Set "Chipset" -> "ME PATH" to the directory containing TXE and SPI descriptor(../maxfirmware)
Building
make crossgcc make
- The firmware produced is build/coreboot.rom
Building without TXE/SPI descriptor
make menuconfig
- Set Chipset -> Include the TXE to No
make crossgcc make
- When flashing the firmware, only flash the last 3MB of the 8 MB image onto the last 3MB of the chip
- Example command using flashrom and a dediprog: echo 00500000:007fffff coreboot > regions.txt ; sudo flashrom -p dediprog -l regions.txt -i coreboot -w coreboot.rom
- If you accidentally overwrite the first half, you will need to reflash the original firmware, which is available here.