1Description 2=========== 3 4The i.MX 8M family of applications processors based on Arm Corte-A53 and Cortex-M4 5cores provide high-performance computing, power efficiency, enhanced system 6reliability and embedded security needed to drive the growth of fast-growing 7edge node computing, streaming multimedia, and machine learning applications. 8 9Boot Sequence 10============= 11 12Bootrom --> SPL --> BL31 --> BL33(u-boot) --> Linux kernel 13 14How to build 15============ 16 17Build Procedure 18--------------- 19 20- Prepare AARCH64 toolchain. 21 22- Build spl and u-boot firstly, and get binary images: u-boot-spl.bin, 23 u-boot-nodtb.bin and dtb for the target board. 24 25- Build TF-A 26 27 Build bl31: 28 29 .. code:: shell 30 31 CROSS_COMPILE=aarch64-linux-gnu- make PLAT=<Target_SoC> bl31 32 33 Target_SoC should be "imx8mq" for i.MX8MQ SoC. 34 35Deploy TF-A Images 36----------------- 37 38TF-A binary(bl31.bin), u-boot-spl.bin u-boot-nodtb.bin and dtb are combined 39together to generate a binary file called flash.bin, the imx-mkimage tool is 40used to generate flash.bin, and flash.bin needs to be flashed into SD card 41with certain offset for BOOT ROM. the u-boot and imx-mkimage will be upstreamed 42soon, this doc will be updated once they are ready, and the link will be posted. 43