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Processor Configuration Registers

198 Datasheet, Volume 2

2.12.14 DMIESD—DMI Element Self Description Register

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

Declaration Capability.

B/D/F/Type: 0/0/0/DMIBAR

Address Offset: 44–47h

Reset Value: 0100_0202h

Access: RO, RW-O

Size: 32 bits

BIOS Optimal Default 0h

Bit Attr

Reset

Value

RST/

PWR

Description

31:24 RO 01h Uncore

Port Number (PORTNUM)

This field specifies the port number associated with this element

with respect to the component that contains this element. This port

number value is utilized by the egress port of the component to

provide arbitration to this Root Complex Element.

23:16 RW-O 00h Uncore

Component ID (CID)

This field identifies the physical component that contains this Root

Complex Element.

BIOS Requirement: Must be initialized according to guidelines in

the PCI Express* Isochronous/Virtual Channel Support Hardware

Programming Specification (HPS).

15:8 RO 02h Uncore

Number of Link Entries (NLE)

This field indicates the number of link entries following the Element

Self Description. This field reports 2 (one for MCH egress port to

main memory and one to egress port belonging to ICH on other

side of internal link).

7:4 RO 0h Reserved

3:0 RO 2h Uncore

Element Type (ETYP)

This field indicates the type of the Root Complex Element.

A value of 2h represents an Internal Root Complex Link (DMI).

1 2 ... 193 194 195 196 197 198 199 200 201 202 203 ... 299 300

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Intel E3-1275 Fiche technique Page 198