ERR<n>MISC1 Error Record <n> Miscellaneous Register 1 when error record n is implemented 0 65534 RAS 0x028 + (64 * n) ERR<n>MISC1 RW IMPLEMENTATION DEFINED error syndrome register. The miscellaneous syndrome registers might contain: Information to locate where the error was detected. If the error was detected within a FRU, the identity of the FRU. A Corrected error counter or counters. Other state information not present in the corresponding status and address registers. RAS ERRFR[FirstRecordOfNode(n)] describes the features implemented by the node that owns error record <n>. FirstRecordOfNode(n) is the index of the first error record owned by the same node as error record <n>. If the node owns a single record then FirstRecordOfNode(n) = n. For IMPLEMENTATION DEFINED fields in ERR<n>MISC1, writing zero returns the error record to an initial quiescent state. In particular, if any IMPLEMENTATION DEFINED syndrome fields might generate a Fault Handling or Error Recovery Interrupt request, writing zero is sufficient to deactivate the Interrupt request. Fields that are read-only, nonzero, and ignore writes are compliant with this requirement. Arm recommends that any IMPLEMENTATION DEFINED syndrome field that can generate a Fault Handling, Error Recovery, Critical, or IMPLEMENTATION DEFINED, interrupt request is disabled at Cold reset and is enabled by software writing an IMPLEMENTATION DEFINED nonzero value to an IMPLEMENTATION DEFINED field in ERRCTLR[FirstRecordOfNode(n)]. ERR<n>MISC1 is a 64-bit register. IMPLEMENTATION DEFINED 63 0 63:0 IMPLEMENTATION DEFINED syndrome. Reads from ERR<n>MISC1 return an IMPLEMENTATION DEFINED value and writes have IMPLEMENTATION DEFINED behavior. When the node that owns error record n implements the Common Fault Injection Mechanism, ERRPFGF[FirstRecordOfNode(n)].MV is 1, and ERR<n>STATUS.MV is 0, then syndrome fields in this register that are not updated by the node when an injected error is reported are RW. See ERR<n>PFGF.MV for more information. Otherwise, and for other fields in this register, Arm recommends that: Syndrome fields for multiple errors, such as a corrected error counter, are RW. Other syndrome fields specific to the most recently recorded error are accessible as follows: If ERR<n>STATUS.MV == 0, accesses to these fields are UNKNOWN/WI. If ERR<n>STATUS.MV == 1, accesses to these fields are RO. These recommendations allow a counter to be reset in the presence of a persistent error, while preventing specific information, such as that identifying a FRU, from being lost if an error is detected while the previous error is being logged. 2026-03-26 20:27:25 2026-03_rel