| Abdellatif El Khlifi | ad9b8e5 | 2021-04-21 17:20:43 +0100 | [diff] [blame] | 1 | Diphda Platform |
| 2 | ========================== |
| 3 | |
| 4 | Some of the features of the Diphda platform referenced in TF-A include: |
| 5 | |
| 6 | - Cortex-A35 application processor (64-bit mode) |
| 7 | - Secure Enclave |
| 8 | - GIC-400 |
| 9 | - Trusted Board Boot |
| 10 | |
| 11 | Boot Sequence |
| 12 | ------------- |
| 13 | |
| 14 | The board boot relies on CoT (chain of trust). The trusted-firmware-a |
| 15 | BL2 is extracted from the FIP and verified by the Secure Enclave |
| 16 | processor. BL2 verification relies on the signature area at the |
| 17 | beginning of the BL2 image. This area is needed by the SecureEnclave |
| 18 | bootloader. |
| 19 | |
| 20 | Then, the application processor is released from reset and starts by |
| 21 | executing BL2. |
| 22 | |
| 23 | BL2 performs the actions described in the trusted-firmware-a TBB design |
| 24 | document. |
| 25 | |
| 26 | Build Procedure (TF-A only) |
| 27 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 28 | |
| 29 | - Obtain AArch64 ELF bare-metal target `toolchain <https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads>`_. |
| 30 | Set the CROSS_COMPILE environment variable to point to the toolchain folder. |
| 31 | |
| 32 | - Build TF-A: |
| 33 | |
| 34 | .. code:: shell |
| 35 | |
| 36 | make LD=aarch64-none-elf-ld \ |
| 37 | CC=aarch64-none-elf-gcc \ |
| 38 | V=1 \ |
| 39 | BUILD_BASE=<path to the build folder> \ |
| 40 | PLAT=diphda \ |
| 41 | SPD=spmd \ |
| 42 | SPMD_SPM_AT_SEL2=0 \ |
| 43 | DEBUG=1 \ |
| 44 | MBEDTLS_DIR=mbedtls \ |
| 45 | OPENSSL_DIR=<path to openssl usr folder> \ |
| 46 | RUNTIME_SYSROOT=<path to the sysroot> \ |
| 47 | ARCH=aarch64 \ |
| 48 | TARGET_PLATFORM=<fpga or fvp> \ |
| 49 | ENABLE_PIE=1 \ |
| 50 | BL2_AT_EL3=1 \ |
| 51 | CREATE_KEYS=1 \ |
| 52 | GENERATE_COT=1 \ |
| 53 | TRUSTED_BOARD_BOOT=1 \ |
| 54 | COT=tbbr \ |
| 55 | ARM_ROTPK_LOCATION=devel_rsa \ |
| 56 | ROT_KEY=plat/arm/board/common/rotpk/arm_rotprivk_rsa.pem \ |
| 57 | BL32=<path to optee binary> \ |
| 58 | BL33=<path to u-boot binary> \ |
| 59 | bl2 |
| 60 | |
| 61 | *Copyright (c) 2021, Arm Limited. All rights reserved.* |