Intel E7-8891 v2 CM8063601377422 User Manual

Product codes
CM8063601377422
Page of 504
Intel
®
 Xeon
® 
Processor E7-2800/4800/8800 v2 Product Family
387
Datasheet Volume Two: Functional Description, February 2014
Integrated I/O (IIO) Configuration Registers
10:10
RW
0x0
legacy_port:
Sockets where the NodeID = 0 are generally identified as having the legacy 
DMI port. But there is still a possibility that another socket also has a 
NodeID = 0. The system is configured by software to route legacy 
transactions to the correct socket. However, inbound legacy messages 
received on a PCIe* port of a socket with NodeID = 0, that is not the true 
legacy port need to be routed to a remote socket, that is the true legacy 
port.
For a local NodeID is zero, this bit is used to determine if inbound messages 
should be routed to a DMI port on a remote socket with NodeID = 0, or if 
the messages should be sent to the local DMI port, since the local NodeID is 
also 0. If the local NodeID is not zero, then this bit is ignored.
0: indicates this socket has the true DMI legacy port, send legacy 
transactions to local DMI port
1: indicates this is a non-legacy socket, send legacy transactions to the 
Coherent Interface
Notes:
This bit does not affect routing for non-message transactions. It only affects 
inbound messages that need to be routed to the true legacy port.
This bit is NOT used for any outbound address decode/routing purposes. 
Outbound traffic, that is, subtractively decoded will always be forwarded to 
local DMI port, if one exists, or it will be aborted.
The default value of this field is based on the NodeID and 
FWAGENT_DMIMODE straps.
Software can only change this bit after reset during early boot phase, but 
must guarantee there is no traffic flowing through the system, except for 
the write that changes this bit.
9:9
RV
-
Reserved.
8:8
RW
0x0
tocmvalid:
Enables the TOCM field.
7:3
RW
0xe
tocm:
Indicates the top of Core physical addressability limit.
00000-00100: Reserved
00101: 2^37
00110: 2^38
...
1110: 2^46
01111 -11111: Reserved
iio uses this to abort all inbound transactions that cross this limit.
2:2
RW
0x0
en1k:
This bit when set, enables 1K granularity for I/O space decode in each of 
the virtual P2P bridges corresponding to root ports, and DMI ports.
1:1
RWS_O
0x0
uniphy_disable:
Place entire UNIPHY in L2 (for when no ports are used, as in some 
multisocket configurations)
Type:
CFG
PortID:
N/A
Bus:
0
Device:
5Function:0
Offset:
0x1c0
Bit
Attr
Default
Description
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