HP A2Y15AV User Manual

Processor Configuration Registers

230

Datasheet, Volume 2

2.12.19 DMILE1D—DMI Link Entry 1 Description Register

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

B/D/F/Type:

0/0/0/DMIBAR

Address Offset:

50–53h

Reset Value:

00000000h

Access:

RW-O, RO

Size:

32 bits

BIOS Optimal Default

0000h

Bit

Access

Reset

Value

RST/

PWR

Description

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)
Identifies the physical component that is targeted by this link

entry.
BIOS Requirement: This field must be initialized according to

guidelines in the PCI Express* Isochronous/Virtual Channel

Support Hardware Programming Specification (HPS).

15:2

Reserved (RSVD)

Uncore

Link Type (LTYP)
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.

RW-O

Uncore

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