TDA4VM: Is there any reference design on 2GByte DDR RAM?

Hi,

There is no reference for the memory map. But atleast from the vision_apps firmwares perspective, you don't need to modify a lot of things as the default memory map for R5Fs, C6x is constrained to 2GB DDR, see the attached default system memory map.

/cfs-file/__key/communityserver-discussions-components-files/791/1323.system_5F00_memory_5F00_map.html 

What lies outside of the 2GB DDR is the DDR_C7X_1_LOCAL_HEAP of 256MB.

Also, please make sure if you are making some changes in the vision_apps firmwares' memory map, you need to make corresponding changes to the Linux device tree (if you are using Linux as your HLOS) to reserve it from using that section of the DDR. The DDR used by the default SDK firmwares is already reserved in Linux see k3-j721e-som-p0.dtsi

Regards

Karan

Closing the loop on this.

You need to reserve some DDR memory for remote core - MCU1_0, MCU1_1, MCU2_0, MCU2_1, MCU3_0, MCU3_1, C6x_1, C6x_2, C7x.

Now this memory would depend on what kind of use case you want to run on these cores. Please refer the developer note on how to modify these - https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/08_02_00_05/exports/docs/psdk_rtos/docs/user_guide/developer_notes_memory_map.html .

Also, the the below html show the default mem map:

/cfs-file/__key/communityserver-discussions-components-files/791/1323.system_5F00_memory_5F00_map.html 

Regards

Karan