Hi Chris,

This file was created for importing platform defined symbols, and guess there would be other symbols to be referenced, but unfortunately till now the ‘metadata’ (will be renamed into ‘local storage pointer’) is the only item in this file.

Actually the rom loader (rom_loader.c) references platform defined symbols as well, so thinking if we could gather them together into one unified file (data_symbols.c and data_import.h) cfor importing platform-defined symbols. As we are MCU software so referencing symbols directly instead of getter function would be more straightforward. But since it is another bridge between SPM and platform so at least we need to well introduce it in the HAL docs.

This idea is not solid planned so what you think of unifying the external symbol referencing mechanism?

BR

/Ken

From: Chris.Brand--- via TF-M <tf-m@lists.trustedfirmware.org>
Sent: Tuesday, February 28, 2023 7:42 AM
To: tf-m@lists.trustedfirmware.org
Subject: [TF-M] tfm_hal_memory_symbols

Hi,

I’m looking at https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git/commit/?id=df8716b40a13e3c98f4a192582ca083d2508f8ad which added tfm_hal_memory_symbols.{c|h}, containing tfm_hal_sp_meta_start and tfm_hal_sp_meta_end. The former is used in backend_ipc.c, while the latter is unused.

The commit message says “this is the first example of using defined symbols to get memory info” but that commit is over two years old now and there doesn’t seem to be a second example. Is there still a plan to move in this direction? If so, can somebody outline what that involves?

Thanks,

Chris Brand

Cypress Semiconductor (Canada), Inc.

An Infineon Technologies Company

Sr Prin Software Engr

CSCA CSS ICW SW PSW 1

Chris.Brand@infineon.com

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