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
16Currently, the main difference between TC0 (TARGET_PLATFORM=0), TC1
17(TARGET_PLATFORM=1), TC2 (TARGET_PLATFORM=2) platforms w.r.t to TF-A
18is the CPUs supported as below:
19
20-  TC0 has support for Cortex A510, Cortex A710 and Cortex X2.
21-  TC1 has support for Cortex A510, Cortex Makalu and Cortex X3.
22-  TC2 has support for Hayes and Hunter Arm CPUs.
23
24
25Boot Sequence
26-------------
27
28The execution begins from SCP_BL1. SCP_BL1 powers up the AP which starts
29executing AP_BL1 and then executes AP_BL2 which loads the SCP_BL2 from
30FIP to SRAM. The SCP has access to AP SRAM. The address and size of SCP_BL2
31is communicated to SCP using SDS. SCP copies SCP_BL2 from SRAM to its own
32RAM and starts executing it. The AP then continues executing the rest of TF-A
33stages including BL31 runtime stage and hands off executing to
34Non-secure world (u-boot).
35
36Build Procedure (TF-A only)
37~~~~~~~~~~~~~~~~~~~~~~~~~~~
38
39-  Obtain `Arm toolchain`_ and set the CROSS_COMPILE environment variable to
40   point to the toolchain folder.
41
42-  Build TF-A:
43
44   .. code:: shell
45
46      make PLAT=tc BL33=<path_to_uboot.bin> \
47      SCP_BL2=<path_to_scp_ramfw.bin> TARGET_PLATFORM={0,1,2} all fip
48
49   Enable TBBR by adding the following options to the make command:
50
51   .. code:: shell
52
53      MBEDTLS_DIR=<path_to_mbedtls_directory>  \
54      TRUSTED_BOARD_BOOT=1 \
55      GENERATE_COT=1 \
56      ARM_ROTPK_LOCATION=devel_rsa  \
57      ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem
58
59--------------
60
61*Copyright (c) 2020-2022, Arm Limited. All rights reserved.*
62
63.. _Arm Toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads
64