Regarding some usage scenarios on the AMP system

[xiaogu-arch]

Hello, I have a few questions and would appreciate some advice. Thank you.

Regarding the Icicle board: Currently, I am using an AMP system image with the Linux + FreeRTOS architecture (version 2025.03). I can see that it automatically runs a FreeRTOS demo when powered on. If I want to write my own FreeRTOS code, can I continue development using the project from this link? If yes, which version should I use?
In the above system environment (the AMP system with Linux + FreeRTOS architecture), does FreeRTOS have a separate interface for directly reading from and writing to FPGA addresses—similar to the "fpga-fabric-interfaces" in Linux?

[rockoguido]

Hello, yes you can move forward to release 2025.07 for this and just make sure all components are at this release

• Reference design for the Icicle Kit
• HSS for the Icicle Kit
• Yocto plus AMP + FreeRTOS

You can also stay at your current version and it is quite current so will be ok

As for accessing the Fabric from FreeRTOS via one or more of the FICs in the PolarFire SoC it is simply a matter of using memory mapped I/O, I am not aware of a special interface and you really don't need one. FreeRTOS is s simple monolithic RTOS that has no awareness of privilege levels and it runs at the equivalent of the Kenel level

I hope that adds clarity and you have done very well so far!

Regards,
Dave

[xiaogu-arch]

Here's the situation: Currently, on Yocto'AMP, there's Linux + FreeRTOS. I'm using the following method to replace the FreeRTOS demo. Are there any other ways to solidify the code? I found that using my remotectrl method would get stuck at the initialization of rpmsg. Could you please tell me why? Later, I will try the method you mentioned and change everything to the 2025.07 version format.

The second question is, I would like to ask that on the above-mentioned AMP architecture, if FreeRTOS wants to perform read and write operations on the register addresses of the FPGA, what interface functions are there? Could you please explain it?

[xiaogu-arch]

@rockoguido Now, I use the 2025.07 version to build and download the AMP dual system of linux + freertos, but the following error message appears when remoteproc for freertos under linux, can you help analyze it?