Specification Sheet

DMIBAR Registers
152 Datasheet, Volume 2 of 2
6.15 DMI Element Self Description (DMIESD)—Offset
44h
Provides information about the root complex element containing this Link Declaration
Capability.
Access Method
Default: 1000202h
Type: MEM
(Size: 32 bits)
Offset: [B:0, D:0, F:0] + 44h
3
1
2
8
2
4
2
0
1
6
1
2
8 4 0
0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0
PORTNUM
CID
NLE
RSVD
ETYP
Bit
Range
Default &
Access
Field Name (ID): Description
31:24
1h
RO
PORTNUM: Port Number: 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
0h
RW_O
CID: Component ID: Identifies the physical component that contains this Root
Complex Element.
BIOS Requirement: should be initialized according to guidelines in the PCI Express*
Isochronous/Virtual Channel Support Hardware Programming Specification (HPS).
15:8
2h
RO
NLE: Number of Link Entries: 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
0h
RO
Reserved (RSVD): Reserved.
3:0
2h
RO
ETYP: Element Type: Indicates the type of the Root Complex Element.
Value of 2h represents an Internal Root Complex Link (DMI).