Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 4/01/2024
Public

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3.5.3.11.2. Reliability, Availability, and Serviceability Error Types

When a component accesses memory, an error might be detected in that memory and then be corrected, deferred, or detected but silently propagated. The following table lists the types of RAS errors that are supported in the Cortex* -A76 core.
Table 42.  RAS Error Types Supported in the Cortex* -A76 Core
RAS Error Type Definition
Corrected A Corrected error (CE) is reported for a single-bit ECC error on any protected RAM.
Deferred A Deferred error (DE) is reported for a double-bit ECC error that affects the data RAM on either the L1 data cache or the L2 cache.
Uncorrected An Uncorrected error (UE) is reported for a double-bit ECC error that affects the tag RAM of either the L1 data cache or the L2 cache. A UE is also reported for external aborts that are received in response to a store, data cache maintenance, TLBI maintenance, or cache copyback of dirty data.