Sun Microelectronics
186
UltraSPARC User’s Manual
The physical address of the first error within a class (UE, CE, {TO, BE}) is cap-
tured in the AFAR until the associated error status bit is cleared in AFSR, or an
error from a higher priority class occurs. A CE error overwrites prior TO or BE
errors. A UE error overwrites prior CE, TO and BE errors.
11.5.2 AFSR Parity Syndrome (P_SYND) Overwrite Policy
Parity information for the first occurrence of any error is captured in the P_SYND
field of the AFSR. Error logging is re-enabled by clearing the EDP, CP, WP and
LDP fields. Any set bits in these fields inhibit update to the P_SYND field.
11.5.3 AFSR E-Cache Tag Parity (ETS) Overwrite Policy
Parity information for the first occurrence of any error is captured in the ETS field
of the AFSR register. Error logging in this field can be re-enabled by clearing the
ETP field.
11.5.4 UDB ECC Syndrome (E_SYND) Overwrite Policy
Priority for E_SYND updates: UE > CE
The ECC syndrome of the first error within a class (UE, CE) is captured in the
E_SYND field of the UDB Error Register until the associated error status bit is
cleared in the UDB error register, or an error from a higher priority class occurs.
A UE error overwrites prior CE errors. Note that each slice of the UDB captures
and inhibits independently the updates to its corresponding E_SYND fields.
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