| RD-1 AE (Kronos) Platform |
| ========================= |
| |
| Some of the features of the RD-1 AE platform referenced in TF-A include: |
| |
| - Neoverse-V3AE, Arm9.2-A application processor (64-bit mode) |
| - A GICv4-compatible GIC-720AE |
| |
| Further information on RD1-AE is available at `rd1ae`_ |
| |
| Boot Sequence |
| ------------- |
| |
| BL2 –> BL31 –> BL33 |
| |
| The boot process starts from RSE (Runtime Security Engine) that loads the BL2 image |
| and signals the System Control Processor (SCP) to power up the Application Processor (AP). |
| The AP then runs BL2, which loads the rest of the images, including the runtime firmware |
| BL31, and proceeds to execute it. Finally, it passes control to the non-secure world |
| BL33 (u-boot). |
| |
| BL2 performs the actions described in the `Trusted Board Boot (TBB)`_ document. |
| |
| Build Procedure (TF-A only) |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| - Obtain `Arm toolchain`_ and set the CROSS_COMPILE environment variable to |
| point to the toolchain folder. |
| |
| - Build TF-A: |
| |
| .. code:: shell |
| |
| make \ |
| PLAT=rd1ae \ |
| MBEDTLS_DIR=<mbedtls_dir> \ |
| ARCH=aarch64 \ |
| CREATE_KEYS=1 \ |
| GENERATE_COT=1 \ |
| TRUSTED_BOARD_BOOT=1 \ |
| COT=tbbr \ |
| ARM_ROTPK_LOCATION=devel_rsa \ |
| ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem \ |
| BL33=<path to u-boot binary> \ |
| |
| *Copyright (c) 2024, Arm Limited. All rights reserved.* |
| |
| .. _Arm Toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads |
| .. _rd1ae: https://developer.arm.com/Tools%20and%20Software/Arm%20Reference%20Design-1%20AE |
| .. _Trusted Board Boot (TBB): https://trustedfirmware-a.readthedocs.io/en/latest/design/trusted-board-boot.html |