Intel CONTROLLERS 413808 - Manual (Page 103)

Intel ® 413808 and 413812 I/O Controllers in TPER Mode
October 2007 Developer’s Manual
Order Number: 317805-001US 103
Address Translation Unit (PCI-X)—Intel
®
413808 and 413812
2.7.3.8 Outbound Split Write Uncorrectable Data Error Message
The ATU claims a Split Completion Error Message that indicates an uncorrectable data
error has occurred on one of the ATUs non-posted (I/O or Configuration) write requests
(Message Class = 2h, Message Index = 01h -- Uncorrectable Split Write Data Error or
Message Class = 1h, Message Index = 02h --Uncorrectable Write Data Error).
When the ATU receives a Split Completion Error Message indicating an uncorrectable
data error for an outstanding Configuration or I/O (split) write request, the error is
recorded, and SERR# is asserted (when enabled). Specifically, the following actions
with the given constraints are taken by the ATU:
• When the Parity Error Response bit in the ATUCMD is set, these actions are taken:
— The Master Parity Error bit in the ATUSR is set.
— When the ATU PCI Master Parity Error Interrupt Mask Bit in the ATUIMR is clear,
set the PCI Master Parity Error bit in the ATUISR. When set, no action.
— When the SERR# Enable bit in the ATUCMD is set, and the Uncorrectable Data
Error Recover Enable bit in the PCIXCMD register is clear, assert SERR# ,
otherwise no action. When the ATU asserts SERR#, additional actions are
taken:
Set the SERR# Asserted bit in the ATUSR.
When the ATU SERR# Asserted Interrupt Mask Bit in the ATUIMR is clear, set
the SERR# Asserted bit in the ATUISR. When set, no action.
When the ATU SERR# Detected Interrupt Enable Bit in the ATUCR is set, set
the SERR# Detected bit in the ATUISR. When clear, no action.
• The Received Split Completion Error Message bit in the PCIXSR is set (based on bit
30 of the completer attributes being set). When the ATU sets this bit, additional
actions are taken:
— When the ATU Received Split Completion Error Message Interrupt Mask bit in
the ATUIMR is clear, set the Received Split Completion Error Message bit in the
ATUISR. When set, no action.
• The transaction associated with the Split Completion Error Message is discarded.