DragonBoard 410c
The DragonBoard 410c is a development board based on the Qualcomm APQ8016E SoC. More information can be found on the 96Boards product page.
U-Boot can be used as a replacement for Qualcomm’s original Android bootloader
(a fork of Little Kernel/LK). Like LK, it is installed directly into the aboot
partition. Note that the U-Boot port used to be loaded as an Android boot image
through LK. This is no longer the case, now U-Boot can replace LK entirely.
Installation
First, setup CROSS_COMPILE
for aarch64. Then, build U-Boot for dragonboard410c
:
$ export CROSS_COMPILE=<aarch64 toolchain prefix>
$ make dragonboard410c_defconfig
$ make
This will build u-boot.elf
in the configured output directory.
Although the DragonBoard 410c does not have secure boot set up by default, the firmware still expects firmware ELF images to be “signed”. The signature does not provide any security in this case, but it provides the firmware with some required metadata.
To “sign” u-boot.elf
you can use e.g. qtestsign:
$ ./qtestsign.py aboot u-boot.elf
Then install the resulting u-boot-test-signed.mbn
to the aboot
partition
on your device, e.g. with fastboot flash aboot u-boot-test-signed.mbn
.
U-Boot should be running after a reboot (fastboot reboot
).
Usage
Press Volume Down during boot to enter Fastboot mode.