34. Broadcom Stingray

34.1. Description

Broadcom’s Stingray(BCM958742t) is a multi-core processor with 8 Cortex-A72 cores. Trusted Firmware-A (TF-A) is used to implement secure world firmware, supporting BL2 and BL31 for Broadcom Stingray SoCs.

On Poweron, Boot ROM will load bl2 image and Bl2 will initialize the hardware, then loads bl31 and bl33 into DDR and boots to bl33.

34.2. Boot Sequence

Bootrom –> TF-A BL2 –> TF-A BL31 –> BL33(u-boot)

34.2.1. Code Locations

  • Trusted Firmware-A: link

34.3. How to build

34.3.1. Build Procedure

  • Prepare AARCH64 toolchain.

  • Build u-boot first, and get the binary image: u-boot.bin,

  • Build TF-A

    Build fip:

    make CROSS_COMPILE=aarch64-linux-gnu- PLAT=stingray BOARD_CFG=bcm958742t all fip BL33=u-boot.bin
    

34.3.2. Deploy TF-A Images

The u-boot will be upstreamed soon, this doc will be updated once they are ready, and the link will be posted.