| Usama Arif | bec5afd | 2020-04-17 16:13:39 +0100 | [diff] [blame] | 1 | TC0 Total Compute Platform |
| 2 | ========================== |
| 3 | |
| 4 | Some of the features of TC0 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 | |
| 16 | Boot Sequence |
| 17 | ------------- |
| 18 | |
| 19 | The execution begins from SCP_BL1. SCP_BL1 powers up the AP which starts |
| 20 | executing AP_BL1 and then executes AP_BL2 which loads the SCP_BL2 from |
| 21 | FIP to SRAM. The SCP has access to AP SRAM. The address and size of SCP_BL2 |
| 22 | is communicated to SCP using SDS. SCP copies SCP_BL2 from SRAM to its own |
| 23 | RAM and starts executing it. The AP then continues executing the rest of TF-A |
| 24 | stages including BL31 runtime stage and hands off executing to |
| 25 | Non-secure world (u-boot). |
| 26 | |
| 27 | Build Procedure (TF-A only) |
| 28 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 29 | |
| 30 | - Obtain arm `toolchain <https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads>`_. |
| 31 | Set the CROSS_COMPILE environment variable to point to the toolchain folder. |
| 32 | |
| 33 | - Build TF-A: |
| 34 | |
| 35 | .. code:: shell |
| 36 | |
| 37 | make PLAT=tc0 BL33=<path_to_uboot.bin> \ |
| 38 | SCP_BL2=<path_to_scp_ramfw.bin> all fip |
| 39 | |
| 40 | Enable TBBR by adding the following options to the make command: |
| 41 | |
| 42 | .. code:: shell |
| 43 | |
| 44 | MBEDTLS_DIR=<path_to_mbedtls_directory> \ |
| 45 | TRUSTED_BOARD_BOOT=1 \ |
| 46 | GENERATE_COT=1 \ |
| 47 | ARM_ROTPK_LOCATION=devel_rsa \ |
| 48 | ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem |
| 49 | |
| 50 | *Copyright (c) 2020, Arm Limited. All rights reserved.* |