Datasheet

Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family 453
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
Type: CFG PortID: N/A
Bus: 0 Device: 5Function:2
Offset: IRPP0: 0x240, Size: 128 bits
IRPP1: 0x2c0
Bit Attr Default Description
127:96 ROS_V 0x0
MsgFields[63:32]:
Message-Related Fields.
This field is valid for messages only. These bits contain several message
related fields as defined in the PCIe* specification.
95:64 ROS_V 0x0
MsgFields[31:0]:
Message-Related Fields.
This field is valid for messages only. These bits contain several message
related fields as defined in the PCIe* specification.
63:56 ROS_V 0x0
MsgCode[7:0]:
Message Code.
This field is valid for message requests only. The message code encodings
are as defined in the PCIe* specification.
55:48 RV - Reserved.
47:32 ROS_V 0x0
ReqID[15:0]:
Requester ID.
This field is located here only for memory, configuration, I/O, and
message requests. This field is located elsewhere for completions. This
field in combination with the Tag field form a unique Transaction ID. The
Requester ID is comprised as follows: {device[4:0], function[2:0],
bus[7:0]}. The value from the original request must be preserved into the
completion.
31:31 ROS_V 0x0
TD:
TLP Digest.
A value of “1” in this field indicates the presence of a single DW TLP digest
at the end of the packet for use in ECRC protection as defined by the
PCIe* specification.
Note: Intel Xeon processor E7-2800/4800/8800 v2 product family Product
Family IIO does not support ECRC generation/checking so the switch does
not store/forward ECRC.
30:30 ROS_V 0x0
EP:
Error Poisoned.
This field is used to indicate that the data payload contained in the packet
is poisoned.
29:28 ROS_V 0x0
Attr[1:0]:
Attributes.
These provide hints as to how the packet should be handled:
Bit 1 set to “1” indicates Relaxed Ordering.
Bit 0 set to “1” indicates No Snoop.
This field must be set to all 0’s for configuration requests, I/O requests,
message requests, and message signaled interrupts.