EMC Memory Addresses on AGX Xavier Industrial

[shreeyam]

Hi NVIDIA forum,

We are trying to do real-time access of ECC errors to do a comparison of Orin and Xavier industrial modules during a radiation test. We were given the following code to access ECC errors in JetPack 5 in Orin, now that the ARM RAS drivers have been moved into ARM TrustedFirmware-A and away from the kernel.

You can inject error and keep reading the EMC status register to see if reported:

Disable SCR_CONFIG to allow access to the error injection carveout:

# Comment out (temporarily) the SCR_CONFIG variable in Linux_for_Tegra/p3701.conf.common
# SCR_CONFIG=“tegra234-mb2-bct-scr-p3701-0000.dts”;

Continue reading the status register for testing. The value of one of these status register will increment if a SBE or DBE is generated.

This is only for dev testing. You should not go to production with disabling the SCR config.

# emc-print-emc-ecc-status.sh

echo “EMC_ECC_STATUS_0 (EMC0) = $(sudo ./devmem2 0x02c70ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC1) = $(sudo ./devmem2 0x02c80ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC2) = $(sudo ./devmem2 0x02c90ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC3) = $(sudo ./devmem2 0x02ca0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC4) = $(sudo ./devmem2 0x02cb0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC5) = $(sudo ./devmem2 0x02cc0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC6) = $(sudo ./devmem2 0x02cd0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC7) = $(sudo ./devmem2 0x02ce0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC8) = $(sudo ./devmem2 0x01780ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC9) = $(sudo ./devmem2 0x01790ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC10) = $(sudo ./devmem2 0x017a0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC11) = $(sudo ./devmem2 0x017b0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC12) = $(sudo ./devmem2 0x017c0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC13) = $(sudo ./devmem2 0x017d0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC14) = $(sudo ./devmem2 0x017e0ac4 | awk ‘/Value at address/{print $6}’)”

echo “EMC_ECC_STATUS_0 (EMC15) = $(sudo ./devmem2 0x017f0ac4 | awk ‘/Value at address/{print $6}’)”

I wanted to ask:

1. Does this method work to access the EMC status registers on AGX Xavier as well? I can’t find the documentation for this. Otherwise, is there any other way to access ECC error counts in JP5 on?
2. Does this also work for errors that occur in cache and not DDR memory?

Thank you!

[ShaneCCC]

1. Xavier doesn’t looks like implement the firewall to block the REG access did you try on Xavier for the REG access?

[Bibek]

Answer to 1 is Yes. you can use the script. There is no other way.
Answer to 2 is, Any Memory error in SOC is reported as RAS error from ATF