This is a quick experimental tool that allows one to build a EFI capable bootchain for msm8916-based devices using lk2nd and experimental u-boot build.
Warning
This bootchain is experimental and relies on WIP code.
All devices supported by lk2nd and msm8916-mainline should be supported.
You can get a prebuilt package from releases page. See installation instruction below:
Install combined.img into your boot partition:
- Fastboot:
fastboot flash:raw boot combined.img - Samsung:
heimdall flash --BOOT combined.img
fastboot flash lk2nd lk2nd.img
fastboot flash qhypstub qhypstub.bin
fastboot flash boot thirdstage.ext2
You will need to collect a selection of projects to build the bootchain.
- WIP lk2nd branch:
rebase/nextfrom msm8916-mainline/lk2nd - Linux kernel: Latest branch from msm8916-mainline/linux
- Linaro's Qcom Landing Team U-Boot tree:
caleb/rbx-integrationfrom linaro/qcomlt/u-boot - qhypstub: msm8916-mainline/qhypstub
Build system expects those repositories to exist in the parent dir of the project. See Makefile on how to override the path.
After collecting and checking out desired branches on these repositories, run:
make -j$(nproc)
This will builds all the projects and place artifacts in build/.
U-Boot is configured to check if power button is pressed on the device and
show the menu. Boot the device, hold power when u-boot boots, then use
volume keys to pick mmc 0 (emmc) or mmc 1 (microsd) where you have your EFI
bootloader.