Datasheet

Intel
®
Xeon
®
Processor E7-2800/4800/8800 v2 Product Family 307
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
14.3.13 DMIVC1CDTTHROTTLE
DMI VC1 Credit Throttle
14.3.14 DMIVCPCDTTHROTTLE
DMI VCp Credit Throttle
1:1 RO_V 0x1b
vcmnp:
Virtual Channel M Negotiation Pending
0: The VC negotiation is complete.
1: The VC resource is still in the process of negotiation (initialization or disabling).
This bit indicates the status of the process of Flow Control initialization. It is set by
default on Reset, as well as whenever the corresponding Virtual Channel is
Disabled or the Link is in the DL_Down state.
It is cleared when the link successfully exits the FC_INIT2 state.
BIOS Requirement: Before using a Virtual Channel, software must check whether
the VC Negotiation Pending fields for that Virtual Channel are cleared in both
Components on a Link.
0:0 RV - Reserved
Type: MEM PortID: 8’h7e
Bus: 0 Device: 0Function:0
Offset: 0x3e
Bit Attr Default Description
Type: MEM PortID: 8’h7e
Bus: 0 Device: 0Function:0
Offset: 0x60
Bit Attr Default Description
31:24 RWS 0x0
prd:
Posted Request Data VC1 Credit Withhold
Number of VC1 Posted Data credits to withhold from being reported or used.
23:22 RV - Reserved
21:16 RWS 0x0
prh:
Posted Request Header VC1 Credit Withhold
Number of VC1 Posted Request credits to withhold from being reported or used.
15:8 RWS 0x0
nprd:
Non-Posted Request Data VC1 Credit Withhold
Number of VC1 Non-Posted Data credits to withhold from being reported or used.
7:6 RV - Reserved
5:0 RWS 0x0
nprh:
Non-Posted Request Header VC1 Credit Withhold
Number of VC1 Non-Posted Request credits to withhold from being reported or
used.