topic Re: IMX8DXL ECC Error Checking in i.MX Processors

IMX8DXL ECC Error Checking

chanks — Mon, 12 Aug 2024 19:18:30 GMT

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?

Re: IMX8DXL ECC Error Checking

pengyong_zhang — Tue, 13 Aug 2024 02:38:12 GMT

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

Re: IMX8DXL ECC Error Checking

chanks — Tue, 13 Aug 2024 12:20:12 GMT

That download link doesn't work.

Re: IMX8DXL ECC Error Checking

pengyong_zhang — Wed, 14 Aug 2024 01:31:44 GMT

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-processors/i-mx-8-applications-processors/i-mx-8xlite-applications-processors-for-telematics-v2x-and-industrial-control:iMX8XLite

B.R

Re: IMX8DXL ECC Error Checking

chanks — Wed, 14 Aug 2024 12:42:59 GMT

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?

Re: IMX8DXL ECC Error Checking

pengyong_zhang — Thu, 15 Aug 2024 02:04:53 GMT

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.

Re: IMX8DXL ECC Error Checking

chanks — Thu, 15 Aug 2024 10:58:18 GMT

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