1Description 2=========== 3Broadcom's Stingray(BCM958742t) is a multi-core processor with 8 Cortex-A72 cores. 4Trusted Firmware-A (TF-A) is used to implement secure world firmware, supporting 5BL2 and BL31 for Broadcom Stingray SoCs 6 7On Poweron, Boot ROM will load bl2 image and Bl2 will initialize the hardware, 8then loads bl31 and bl33 into DDR and boots to bl33. 9 10Boot Sequence 11============= 12 13Bootrom --> TF-A BL2 --> TF-A BL31 --> BL33(u-boot) 14 15Code Locations 16-------------- 17- Trusted Firmware-A: 18 `link <https://github.com/ARM-software/arm-trusted-firmware>`__ 19 20How to build 21============ 22 23Build Procedure 24--------------- 25 26- Prepare AARCH64 toolchain. 27 28- Build u-boot first, and get the binary image: u-boot.bin, 29 30- Build TF-A 31 32 Build fip: 33 34 .. code::shell 35 36 make CROSS_COMPILE=aarch64-linux-gnu- PLAT=stingray BOARD_CFG=bcm958742t all fip BL33=u-boot.bin 37 38Deploy TF-A Images 39----------------- 40The u-boot will be upstreamed soon, this doc will be updated once they are ready, and the link will be posted. 41