AM3352: CCS displayed "Memory map prevented reading" during kernel debugging.

Hello,

That training series was created quite a long time ago, and the structure of Linux has changed considerably since then. (e.g., the board file in Linux has been replaced with the devicetree files). You can find more up-to-date board port guidance in the Linux SDK How-to Guides: https://software-dl.ti.com/processor-sdk-linux/esd/docs/07_03_00_005/linux/How_to_Guides_Board_Port.html 

1) To confirm, are you using AM335x Linux Processor SDK 7.3?

2) What are you trying to accomplish with your Linux debug that needs to happen through CCS? I typically suggest customers use these methods for debugging Linux: https://training.ti.com/debugging-embedded-linux-systems-training-series

Regards,

Nick

Hello,

Thank you for reply. And I'll check these pages above.

1) Yes. We're using "ti-processor-sdk-linux-am335x-evm-07.03.00.005-Linux-x86-Install.bin" .

2) Because we have to accomplish EMAC boot. Before trying EMAC boot, we have to succeed in USB boot with AM335x's EVM-SK board. But we have not succeeded in USB boot yet as shown in these two pages.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1031283/tmdssk3358-failed-to-usb-boot

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1052058/tmdssk3358-failed-to-usb-boot

Therefore, I think that we have to investigate u-boot and kernel very carefully. It needs to debug kernel at source code level.

Hello,

We've checked the above two pages you wrote.
software-dl.ti.com/.../How_to_Guides_Board_Port.html
training.ti.com/debugging-embedded-linux-systems-training-series

But, this issue wasn't solved.
Do you have any additional advice ?

Hello Naoto,

I did not have physical access to my boards today, so I was unable  to test these steps. However, section "Debugging with CCS and GDB" from the old wiki page "Processor SDK Linux Training: Hands on with the Linux SDK" may be useful for you:
https://software-dl.ti.com/infotainment/esd/jacinto6/processor-sdk-linux-automotive/6_00_00_03/exports/wiki/Processor%20SDK%20Linux%20Training_%20Hands%20on%20with%20the%20Linux%20SDK%20-%20Texas%20Instruments%20Wiki.pdf 

Regards,

Nick

Hello,
Thank you for advice.
We'll check the documents above.