Intel E7-8891 v2 CM8063601377422 Manual De Usuario

Intel

®

 Xeon

® 

Processor E7-2800/4800/8800 v2 Product Family

387

Datasheet Volume Two: Functional Description, February 2014

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)