| .. SPDX-License-Identifier: GPL-2.0+ |
| .. sectionauthor:: Sumit Garg <sumit.garg@linaro.org> |
| |
| HMIBSC |
| ====== |
| |
| The HMIBSC is an IIoT Edge Box Core board based on the Qualcomm APQ8016E SoC. |
| More information can be found on the `SE 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. |
| |
| .. _SE product page: https://www.se.com/us/en/product/HMIBSCEA53D1L0T/iiot-edge-box-core-harmony-ipc-emmc-dc-linux-tpm/ |
| |
| Build steps |
| ----------- |
| |
| First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for ``hmibsc``:: |
| |
| $ export CROSS_COMPILE=<aarch64 toolchain prefix> |
| $ make hmibsc_defconfig |
| $ make |
| |
| This will build ``u-boot.elf`` in the configured output directory. |
| |
| Installation |
| ------------ |
| |
| Although the HMIBSC 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``). |
| |
| .. _qtestsign: https://github.com/msm8916-mainline/qtestsign |
