910GL datasheet(169/426 Pages) INTEL

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Host-PCI Express* Bridge Registers (D1:F0)

(Intel® 82915G/82915P/82915PL Only)

Datasheet

169

8.1.56

ESD—Element Self Description (D1:F0)

PCI Device:

Address Offset:

144h

Default Value:

02000100h

Access:

RO, R/WO

Size:

32 bits

This register provides information about the root complex element containing this Link

Declaration Capability.

Bit

Access &

Default

Description

31:24

02h

Port Number: This field specifies the port number associated with this element

with respect to the component that contains this element. The egress port of the

component to provide arbitration to this Root Complex Element uses this port

number value.

23:16

R/WO

00h

Component ID: This field indicates the physical component that contains this

Root Complex Element. Component IDs start at 1.

This value is a mirror of the value in the Component ID field of all elements in this

component. The value only needs to be written in one of the mirrored fields and it

will be reflected everywhere that it is mirrored.

15:8

01h

Number of Link Entries: This field indicates the number of link entries following

the Element Self Description. This field reports 1 (to Egress port only as peer-to-

peer capabilities in this topology are not reported).

7:4

Reserved

3:0

Element Type: This field indicates the type of the Root Complex Element.

0h = root port.

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