1TC Total Compute Platform 2========================== 3 4Some of the features of TC platform referenced in TF-A include: 5 6- A `System Control Processor <https://github.com/ARM-software/SCP-firmware>`_ 7 to abstract power and system management tasks away from application 8 processors. The RAM firmware for SCP is included in the TF-A FIP and is 9 loaded by AP BL2 from FIP in flash to SRAM for copying by SCP (SCP has access 10 to AP SRAM). 11- GICv4 12- Trusted Board Boot 13- SCMI 14- MHUv2 15 16The TF-A build is specified by the option `TARGET_PLATFORM` which represents 17the Total Compute platform number. The platforms support the CPU variants 18listed as below: 19 20- TC3 has support for Cortex A520, Cortex A725 and Cortex x925. 21 22Boot Sequence 23------------- 24 25The execution begins from SCP_BL1. SCP_BL1 powers up the AP which starts 26executing AP_BL1 and then executes AP_BL2 which loads the SCP_BL2 from 27FIP to SRAM. The SCP has access to AP SRAM. The address and size of SCP_BL2 28is communicated to SCP using SDS. SCP copies SCP_BL2 from SRAM to its own 29RAM and starts executing it. The AP then continues executing the rest of TF-A 30stages including BL31 runtime stage and hands off executing to 31Non-secure world (u-boot). 32 33Build Procedure (TF-A only) 34~~~~~~~~~~~~~~~~~~~~~~~~~~~ 35 36- Obtain `Arm toolchain`_ and set the CROSS_COMPILE environment variable to 37 point to the toolchain folder. 38 39- Build TF-A: 40 41 .. code:: shell 42 43 make PLAT=tc BL33=<path_to_uboot.bin> \ 44 SCP_BL2=<path_to_scp_ramfw.bin> TARGET_PLATFORM={3} all fip 45 46 Enable TBBR by adding the following options to the make command: 47 48 .. code:: shell 49 50 MBEDTLS_DIR=<path_to_mbedtls_directory> \ 51 TRUSTED_BOARD_BOOT=1 \ 52 GENERATE_COT=1 \ 53 ARM_ROTPK_LOCATION=devel_rsa \ 54 ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem 55 56-------------- 57 58*Copyright (c) 2020-2025, Arm Limited. All rights reserved.* 59 60.. _Arm Toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads 61