IMX8DXL ECC Error Checking

[chanks]

We used the register programming aid to build a custom SCFW for our IMX8DXL which enables ECC on the entire 1GB of RAM.  However, it's unclear how the software would actually know an ECC error occurs.

• Is there any way to know that a single-bit error was corrected in RAM?
• Is there any way to be notified that an uncorrectable error occurred?

[pengyong_zhang · Accepted solution]

hi @chanks 

There are lots of ECC registers on RM file, and please refer it. About about corrected and uncorrectable errors you mentioned please see the corrected and uncorrected register.

[chanks]

Thank you! It turns out I was looking at the March 2023 version of the reference manual which did not have these registers defined!

[pengyong_zhang]

hi @chanks 

Use the follow link download the i.MX8DXL RM file.

https://www.nxp.com/products/processors-and-microcontrollers/arm-processors/i-mx-applications-proces...

B.R

[pengyong_zhang]

Hi， @chanks 

Please see the description of ECC register on the below link:

You can find the Related register get the ECC report content.

https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true

B.R

[chanks]

I've already looked through the DDR section of the RM. The only ECC registers that I see are the configuration registers ECCCFG0 and ECCCFG1.  What register am I missing that contains information on corrected and uncorrectable errors?

I see that there are two interrupts ECC_CORRECT_INT and ECC_NCORRECT_INT.  Is there anything in linux-imx that monitors these interrupts?

[chanks]

That download link doesn't work.