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NXP i.MX 8M Series

The i.MX 8M family of applications processors based on Arm Corte-A53 and Cortex-M4 cores provide high-performance computing, power efficiency, enhanced system reliability and embedded security needed to drive the growth of fast-growing edge node computing, streaming multimedia, and machine learning applications.

Boot Sequence

Bootrom --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel

How to build

Build Procedure

Prepare AARCH64 toolchain.
Build spl and u-boot firstly, and get binary images: u-boot-spl.bin, u-boot-nodtb.bin and dtb for the target board.
Build TF-A

Build bl31:
```
CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31
```
Target_SoC should be "imx8mq" for i.MX8MQ SoC. Target_SoC should be "imx8mm" for i.MX8MM SoC.

Deploy TF-A Images

TF-A binary(bl31.bin), u-boot-spl.bin u-boot-nodtb.bin and dtb are combined together to generate a binary file called flash.bin, the imx-mkimage tool is used to generate flash.bin, and flash.bin needs to be flashed into SD card with certain offset for BOOT ROM. the u-boot and imx-mkimage will be upstreamed soon, this doc will be updated once they are ready, and the link will be posted.

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