Chipset Configuration Registers
10.1.21 RP2D—Root Port 2 Descriptor Register
Offset Address: 0130–0133h
Attribute:
Size:
R/WO, RO
32-bit
Default Value:
02xx0002h
Bit
Description
Target Port Number (PN) — RO. Indicates the target port number is 2h (root port
#2).
31:24
23:16
Target Component ID (TCID) — R/WO. This field returns the value of the ESD.CID
(offset 0104h, bits 23:16) field programmed by platform BIOS, since the root port is
in the same component as the RCRB.
15:2
1
Reserved
Link Type (LT) — RO. Indicates that the link points to a root port.
Link Valid (LV) — RO. When RPC.PC (offset 0224h, bits 1:0) is ‘01’, ‘10’, or ‘11’, or
FD.PE2D (offset 3418h, bit 17) is set, the link for this root port is not valid (return 0).
When RPC.PC is ‘00’ and FD.PE2D is cleared, the link for this root port is valid (return
1).
0
10.1.22 RP2BA—Root Port 2 Base Address Register
Offset Address: 0138–013Fh
Attribute:
Size:
RO
64-bit
Default Value:
00000000000E1000h
Bit
Description
63:28
27:20
19:15
14:12
11:0
Reserved
Bus Number (BN) — RO. Indicates the root port captured bus number.
Device Number (DN) — RO. Indicates the root port is on device #28.
Function Number (FN) — RO. Indicates the root port is on function #1.
Reserved
10.1.23 RP3D—Root Port 3 Descriptor Register
Offset Address: 0140–0143h
Attribute:
Size:
R/WO, RO
32-bit
Default Value:
03xx0002h
Bit
Description
Target Port Number (PN) — RO. Indicates the target port number is 3h (root port
#3).
31:24
23:16
Target Component ID (TCID) — R/WO. This field returns the value of the ESD.CID
(offset 0104h, bits 23:16) field programmed by platform BIOS, since the root port is
in the same component as the RCRB.
15:2
1
Reserved
Link Type (LT) — RO. Indicates that the link points to a root port.
Link Valid (LV) — RO. When RPC.PC (offset 0224h, bits 1:0) is ‘11’, or FD.PE3D
(offset 3418h, bit 18) is set, the link for this root port is not valid (return 0). When
RPC.PC is ‘00’, ‘01’, or “10’, and FD.PE3D is cleared, the link for this root port is valid
(return 1).
0
314
Datasheet
INTEL [ INTEL ]
