62056e4e8f
This allows the BL31 port to run with position-independent execution enabled so that it can be ran from any address in the system. This increases the flexibility of the image, allowing it to be ran from other locations rather than only its hardcoded absolute address (currently set to the typical DRAM base of 2GB). This may be useful for future images that describe system configurations with other memory layouts (e.g. where SRAM is included). It does this by setting ENABLE_PIE=1 and changing the absolute address to 0. The load address of bl31.bin can then be specified by the -l [load address] argument in the fpga-run command (additionally, this address is required by any preceding payloads that specify the start address. For ELF payloads this is usually extracted automatically by reading the entrypoint address in the header, however bl31.bin is a different file format so has this additional dependency). Signed-off-by: Oliver Swede <oli.swede@arm.com> Change-Id: Idd74787796ab0cf605fe2701163d9c4b3223a143 |
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|---|---|---|
| bl1 | ||
| bl2 | ||
| bl2u | ||
| bl31 | ||
| bl32 | ||
| common | ||
| docs | ||
| drivers | ||
| fdts | ||
| include | ||
| lib | ||
| make_helpers | ||
| plat | ||
| services | ||
| tools | ||
| .checkpatch.conf | ||
| .editorconfig | ||
| .gitignore | ||
| .gitreview | ||
| Makefile | ||
| dco.txt | ||
| license.rst | ||
| readme.rst | ||
readme.rst
Trusted Firmware-A
Trusted Firmware-A (TF-A) is a reference implementation of secure world software for Arm A-Profile architectures (Armv8-A and Armv7-A), including an Exception Level 3 (EL3) Secure Monitor. It provides a suitable starting point for productization of secure world boot and runtime firmware, in either the AArch32 or AArch64 execution states.
TF-A implements Arm interface standards, including:
- Power State Coordination Interface (PSCI)
- Trusted Board Boot Requirements CLIENT (TBBR-CLIENT)
- SMC Calling Convention
- System Control and Management Interface (SCMI)
- Software Delegated Exception Interface (SDEI)
The code is designed to be portable and reusable across hardware platforms and software models that are based on the Armv8-A and Armv7-A architectures.
In collaboration with interested parties, we will continue to enhance TF-A with reference implementations of Arm standards to benefit developers working with Armv7-A and Armv8-A TrustZone technology.
Users are encouraged to do their own security validation, including penetration testing, on any secure world code derived from TF-A.
More Info and Documentation
To find out more about Trusted Firmware-A, please view the full documentation that is available through trustedfirmware.org.
Copyright (c) 2013-2019, Arm Limited and Contributors. All rights reserved.