Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 2/14/2023
Public

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3.5.12.1. Error Reporting

Detected errors are reported in the CPUMERRSR or L2MERRSR registers and also signaled on the PMUEVENT bus. Detected errors include errors that are successfully corrected, and those that cannot be corrected. If multiple errors occur on the same clock cycle then only one of them is reported.

Errors that cannot be corrected, and therefore might result in data corruption, also cause an abort. Your software can register this error and can either attempt to recover or can restart the system.

When an L1 data or L2 dirty cache line with an error on the data RAMs is evicted from the processor, the write on the master interface still takes place. However, if the error is uncorrectable, then the incorrect data is not written externally.