I had update the HAL design and split into smaller patches for easier review so that they can be merged one by one.

All patch link is here: https://review.trustedfirmware.org/q/topic:%22TF-M_HAL%22+(status:open%20OR%20status:merged).

BR,

Edison

From: Edison Ai
Sent: Tuesday, June 30, 2020 6:39 PM
To: 'tf-m@lists.trustedfirmware.org' <tf-m@lists.trustedfirmware.org>
Cc: nd <nd@arm.com>
Subject: RE: Call for review on TF-M HAL design

Hi All,

First, thanks very much for the good review of the first part of the TF-M HAL design.

Now, the second part is ready for reviewing too: https://review.trustedfirmware.org/q/topic:%22TF-M_HAL%22+(status:open%20OR%20status:merged).

This part mainly focuses on the TF-M Secure Partition HAL, which includes: flash, NV counter, crypto, lifecycle, and boot seed.

And I create a different patch for each module for easier review.

Please see the design for more details and welcome comments.

BR,

Edison

From: Edison Ai
Sent: Thursday, May 14, 2020 12:14 PM
To: 'tf-m@lists.trustedfirmware.org' <tf-m@lists.trustedfirmware.org>
Cc: nd <nd@arm.com>
Subject: Call for review on TF-M HAL design

Hi All,

Please review the design of the TF-M HAL: https://review.trustedfirmware.org/c/trusted-firmware-m/+/4076.

This new design aims to make the TF-M more simple to integrate and porting to different platforms. The current version only includes the HAL API for the TF-M core, the HAL for Secure Partition will be the next step.

Main Context:

• There are 6 modules in the Core HAL:
• Isolation API: Provides the necessary isolation functionalities required by the PSA FF and TBSA-M, and provides functions to SPM to check the validate of memory access.
• Platform API: Provides the platform initial, receives platform data, system reset, etc.
• Loader API: Provides the function to load partition and service and provides the necessary data to SPM.
• Log dev API: Provides the log system functions.
• Interrupt API: Provides the interrupt functions.
• Debug API: Provides the debug functions.

• There are some sequence diagrams that help you to more quick and easy the using of the new HAL.

Main Change:

        There are some main changes to the TF-M core:

• Move most of the platform data from Core to the platform and need tools to support it.
• The platform needs to provide the required necessary memory to the Core for its runtime data using.

• Load mode change. The platform needs to load the secure partition and provide the necessary info to the core.

Please see the design for more details and welcome comments.

BR,

Edison