TDA4VM: System Memory Map

heyanbing

Prodigy 80 points

Part Number: TDA4VM

Tool/software:

Hi, TI experts

My SDK version is 8.01.

I reference the document: software-dl.ti.com/.../developer_notes_memory_map.html

I would like to modify system memory map, I want more memory on A72.

When I modified the gen_linker_mem_map.py file to generate the memory map related files, I encountered some problems:

1、I reduced DDR_C7X_1_LOCAL_HEAP from 384MB to 368MB, DDR_C7X_1_SCRATCH from 256MB to 192MB, EEPROM_SHADOW from 16MB to 1024KB, I added 95MB memory on A72, my system and apps were fine. But I want more 100MB on A72. so, I tried to reduce DDR_SHARED_MEM from 512MB to 448MB, my apps were executing abnormally.

According to the design requirements of the sdk, can I release another 100MB memory?

2、When I rudeced DDR_MCU1_1 from 15MB to 8MB, I encountered compilation error:

I reduced the other remote core memory, I also encountered the similar compilation error.

3、I don't need mcu1_1 and mcu3_1, can I remove these 2 remote cores to free up some memory?

over 1 year ago

0 Nikhil Dasan over 1 year ago

TI__Guru* 84746 points

Hi,

These are basically alignment related issues.

I would suggest following the below document to get the correct alignment

8.9. Understanding and updating SDK memory map for J721E — Processor SDK RTOS J721E

Regards,

Nikhil

0 wu zhidong over 1 year ago in reply to Nikhil Dasan

Prodigy 90 points

HI Nikhil，

Thanks for your reply。

We have conducted the following tests:

On the basis of everything running normally, we only modified the values of DDR_MCU3_0 and DDR_MCU3_1, changing them from 15MB to 9MB and 5MB respectively. This modification complies with the address alignment rules, and the compilation is successful. We also recompiled the k3-j721e-vision-apps.dtbo. After the system starts running, the remote core log shows that the remote core runs normally, but when running vx_app_arm_ipc.out, it indicates IPC failure, and the log is as shown below. Please help analyze why.