2.16.2 Byte parity error injection

The CCN-502 has error injection logic in the XPs and HN-Fs. For test purposes, software can use that logic to inject byte parity errors in the data stream and test that the software error routine can correctly process the parity errors.

Software can inject byte parity errors when the CCN-502 generates byte parity. The XP can inject byte parity errors in the RN-F DAT VC input data and the HN-F can inject byte parity errors in the L3 cache read data.

After the XP Byte Parity Error Injection register is written, the XP injects a parity error on the specified byte lane of the next valid DAT flit sent from the RN-F.

After the HN-F Byte Parity Error Injection register is written, the HN-F injects a parity error on the specified byte lane for the 4 DAT flits that are associated with the next L3 hit.

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