TDA4VM-Q1: Relationship between firewall, VRING, and DMA

Ni Hua

Prodigy 235 points

Part Number: TDA4VM-Q1

Hi engineers,

I didn't understand this description of IPC functional security.

How do I understand the relationship between firewalls, Vrings, and DMA?

Will DMA corrupt VRING if firewall is not turned on? And How is it corrupt ?

8.4. Developing IPC applications — Processor SDK RTOS J721E

LINK: software-dl.ti.com/.../developer_notes_ipc.html

Best Regards!

over 1 year ago

0 Tarun Mukesh Puvvada over 1 year ago

TI__Mastermind 49416 points

Hello,

Here the meaning was a special reserved memory in DDR for VRING has been created to avoid the conflicts from DMA. Now the VRING reserved memory shall not be used by another application other than IPC.

Please consider that VRING is reserved memory in the DDR which should not be accessed by other application to avoid the data corruption

Regards

Tarun Mukesh

0 Ni Hua over 1 year ago in reply to Tarun Mukesh Puvvada

Prodigy 235 points

Hi Tarun，

So how do I configure parameter Settings to protect VRING memory from DMA corruption?

Can you provide an example?

Thank you for your support!

Regards.

0 Tarun Mukesh Puvvada over 1 year ago in reply to Ni Hua

TI__Mastermind 49416 points

Hello,

VRING has special reserved memory already and it won't be corrupted by DMA .May i know if you are facing any issue ?

We have ipc_echo_test example in PDK.

Regards

Tarun MUkesh

Processors

Processors forum

TDA4VM-Q1: Relationship between firewall, VRING, and DMA