feat(plat/arm): Introduce TC1 platform
This renames tc0 platform folder and files to tc, and introduces
TARGET_PLATFORM variable to account for the differences between
TC0 and TC1.
Signed-off-by: Usama Arif <usama.arif@arm.com>
Change-Id: I5b4a83f3453afd12542267091b3edab4c139c5cd
diff --git a/docs/plat/arm/tc/index.rst b/docs/plat/arm/tc/index.rst
new file mode 100644
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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) and TC1
+(TARGET_PLATFORM=1) platforms w.r.t to TF-A is the CPUs supported. TC0 has
+support for Cortex A510, Cortex A710 and Cortex X2, while TC1 has support for
+Cortex A510, Cortex Makalu and Cortex Makalu ELP 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 <https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads>`_.
+ 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} 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) 2020-2021, Arm Limited. All rights reserved.*