AM623: AM623+mcu+sdk

Hello,

Linux remoteproc driver requires resource table 

The Linux remoteproc driver requires a resource table to be able to load remote core firmware. However, the MCU+ drivers only generate a resource table when Linux IPC is selected in the sysconfig file for the MCU+ core project. Since helloworld does not have Linux IPC enabled, the example cannot be loaded by Linux without modifications.

What are the options if we want to use Linux to load a remote core (instead of CCS or SBL)? 

Option1: Add Linux IPC to the remote core project

This is the simplest option. Just open the sysconfig settings for the project, and enable "Linux A53 IPC RP Message". Reference https://software-dl.ti.com/mcu-plus-sdk/esd/AM62X/08_05_00_14/exports/docs/api_guide_am62x/IPC_GUIDE.html > "Enable IPC in SysConfig".

The downside of Option1 is that the RPMsg libraries take up a lot of space. When I checked on AM62x M4F map files, it looks like adding IPC to a release build adds about 0x1000 of code to M4F IRAM and 0x2200 of code to M4F DRAM.

Option2: add a resource table to the remote core project

You can also just add an empty resource table to the remote core project. This takes some extra steps, but it does not require nearly as much memory as adding Linux IPC. For more information, refer to this post: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1114668/am6252-load-m4-firmware-generate-from-mcu-rtos-sdk/4360349#4360349

Regards,

Nick