EPBAR Registers—Egress Port Register Summary
R
6.1.2
EPLE1D—EP Link Entry 1 Description
MMIO Range:
Address Offset:
Default Value:
Access:
EPBAR
050h
0100h
R/WO, RO
32 bits
Size:
This register provides the First part of a Link Entry that declares an internal link to another Root
Complex Element.
Bit
Access
& Default
Description
31:24
RO
01h
Target Port Number: This field specifies the port number associated with the
element targeted by this link entry (DMI). The target port number is with respect to
the component that contains this element as specified by the target component ID.
23:16
R/WO
00h
Target Component ID: This field identifies the physical or logical component that is
targeted by this link entry. A value of 0 is reserved; 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.
15:2
1
Reserved
RO
0b
Link Type: 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
R/WO
0b
Link Valid
0 = Link Entry is not valid and will be ignored.
1 = Link Entry specifies a valid link.
6.1.3
EPLE1A—EP Link Entry 1 Address
MMIO Range:
Address Offset:
Default Value:
Access:
EPBAR
058h
0000000000000000h
R/WO
Size:
64 bits
This register provides the second part of a Link Entry, which declares an internal link to another
Root Complex Element.
Bit
Access &
Default
Description
63:32
31:12
Reserved
R/WO
Link Address: This field provides the memory-mapped base address of the
0 0000h
RCRB that is the target element (DMI) for this link entry.
11:0
Reserved
Datasheet
111
INTEL [ INTEL ]
