From 102b0d2daa97dae68d3eed54d8fe37a9cc38a892 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 11:13:47 +0200
Subject: Adding upstream version 2.8.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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 docs/plat/arm/tc/index.rst | 63 ++++++++++++++++++++++++++++++++++++++++++++++
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+TC Total Compute Platform
+==========================
+
+Some of the features of TC platform referenced in TF-A include:
+
+- A `System Control Processor <https://github.com/ARM-software/SCP-firmware>`_
+  to abstract power and system management tasks away from application
+  processors. The RAM firmware for SCP is included in the TF-A FIP and is
+  loaded by AP BL2 from FIP in flash to SRAM for copying by SCP (SCP has access
+  to AP SRAM).
+- GICv4
+- Trusted Board Boot
+- SCMI
+- MHUv2
+
+Currently, the main difference between TC0 (TARGET_PLATFORM=0), TC1
+(TARGET_PLATFORM=1), TC2 (TARGET_PLATFORM=2) platforms w.r.t to TF-A
+is the CPUs supported as below:
+
+-  TC0 has support for Cortex A510, Cortex A710 and Cortex X2.
+-  TC1 has support for Cortex A510, Cortex Makalu and Cortex X3.
+-  TC2 has support for Hayes and Hunter Arm CPUs.
+
+
+Boot Sequence
+-------------
+
+The execution begins from SCP_BL1. SCP_BL1 powers up the AP which starts
+executing AP_BL1 and then executes AP_BL2 which loads the SCP_BL2 from
+FIP to SRAM. The SCP has access to AP SRAM. The address and size of SCP_BL2
+is communicated to SCP using SDS. SCP copies SCP_BL2 from SRAM to its own
+RAM and starts executing it. The AP then continues executing the rest of TF-A
+stages including BL31 runtime stage and hands off executing to
+Non-secure world (u-boot).
+
+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=tc BL33=<path_to_uboot.bin> \
+      SCP_BL2=<path_to_scp_ramfw.bin> TARGET_PLATFORM={0,1,2} all fip
+
+   Enable TBBR by adding the following options to the make command:
+
+   .. code:: shell
+
+      MBEDTLS_DIR=<path_to_mbedtls_directory>  \
+      TRUSTED_BOARD_BOOT=1 \
+      GENERATE_COT=1 \
+      ARM_ROTPK_LOCATION=devel_rsa  \
+      ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem
+
+--------------
+
+*Copyright (c) 2020-2022, Arm Limited. All rights reserved.*
+
+.. _Arm Toolchain: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads
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