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Idle states are advertised to the rich OS by declaring them in the DTB. Since the availability of idle states depends on which PSCI implementation was chosen, the DTB must be updated after PSCI setup. Move this operation to bl31_plat_runtime_setup, the platform hook which happens at the right time. Defining this hook overrides the weak definition from plat/common, so copy over the code from there, too. Change-Id: I42a83edb9cb28e1803d17dc2d73dbc879d885222 Signed-off-by: Samuel Holland <samuel@sholland.org> |
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bl2u | ||
bl31 | ||
bl32 | ||
common | ||
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drivers | ||
fdts | ||
include | ||
lib | ||
licenses | ||
make_helpers | ||
plat | ||
services | ||
tools | ||
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Makefile | ||
changelog.yaml | ||
dco.txt | ||
license.rst | ||
package-lock.json | ||
package.json | ||
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.