Intel G640T CM8062301002204 User Manual

Datasheet, Volume 2

197

This register provides the first part of a Link Entry that declares an internal link to 
another Root Complex Element.

This register provides the second part of a Link Entry that declares an internal link to 
another Root Complex Element.

31:24

RW-O

00h

Uncore

Target Port Number (TPN)
This field specifies the port number associated with the element 

targeted by this link entry (egress port of PCH). The target port 

number is with respect to the component that contains this 

element as specified by the target component ID.
This can be programmed by BIOS, but the Reset Value will likely be 

correct because the DMI RCRB in the PCH will likely be associated 

with the default egress port for the PCH meaning it will be assigned 

port number 0.

23:16

RW-O

00h

Uncore

Target Component ID (TCID)
This field identifies the physical component that is targeted by this 

link entry.
BIOS Requirement: Must be initialized according to guidelines in 

the PCI Express* Isochronous/Virtual Channel Support Hardware 

Programming Specification (HPS).

15:2

RO

0h

1

RO

0b

Uncore

Link Type (TXTYP)
This bit indicates that the link points to memory-mapped space (for 

RCRB).
The link address specifies the 64-bit base address of the target 

RCRB.

0

RW-O

0b

Uncore

Link Valid (LV)
0 = Link Entry is not valid and will be ignored.

1 = Link Entry specifies a valid link.

31:12

RW-O

00000h

Uncore

Link Address (LA)
Memory mapped base address of the RCRB that is the target 

element (egress port of PCH) for this link entry.

11:0

RO

0h