HP A2Y15AV User Manual
Processor Configuration Registers
188
Datasheet, Volume 2
2.10.34 PEG_CAP—PCI Express-G Capabilities Register
This register indicates PCI Express* device capabilities.
2.10.35 DCAP—Device Capabilities Register
This register indicates PCI Express* device capabilities.
B/D/F/Type:
0/6/0/PCI
Address Offset:
A2–A3h
Reset Value:
0142h
Access:
RO, RW-O
Size:
16 bits
BIOS Optimal Default
0h
Bit
Access
Reset
Value
RST/
PWR
Description
15:14
RO
0h
Reserved (RSVD)
13:9
RO
00h
Uncore
Interrupt Message Number (IMN)
Not Applicable or Implemented. Hardwired to 0.
Not Applicable or Implemented. Hardwired to 0.
8
RW-O
1b
Uncore
Slot Implemented (SI)
0 = The PCI Express Link associated with this port is connected
0 = The PCI Express Link associated with this port is connected
to an integrated component or is disabled.
1 = The PCI Express Link associated with this port is connected
to a slot.
BIOS Requirement: This field must be initialized appropriately
if a slot connection is not implemented.
7:4
RO
4h
Uncore
Device/Port Type (DPT)
Hardwired to 4h to indicate root port of PCI Express Root
Hardwired to 4h to indicate root port of PCI Express Root
Complex.
3:0
RO
2h
Uncore
PCI Express Capability Version (PCIECV)
Hardwired to 2h to indicate compliance to the PCI Express
Hardwired to 2h to indicate compliance to the PCI Express
Capabilities Register Expansion ECN.
B/D/F/Type:
0/6/0/PCI
Address Offset:
A4–A7h
Reset Value:
00008000h
Access:
RO, RW-O
Size:
32 bits
BIOS Optimal Default
0000000h
Bit
Access
Reset
Value
RST/
PWR
Description
31:16
RO
0h
Reserved (RSVD)
15
RO
1b
Uncore
Role Based Error Reporting (RBER)
This bit indicates that this device implements the functionality
This bit indicates that this device implements the functionality
defined in the Error Reporting ECN as required by the PCI
Express 1.1 specification.
14:6
RO
0h
Reserved (RSVD)
5
RO
0b
Uncore
Extended Tag Field Supported (ETFS)
Hardwired to indicate support for 5-bit Tags as a Requestor.
Hardwired to indicate support for 5-bit Tags as a Requestor.
4:3
RO
00b
Uncore
Phantom Functions Supported (PFS)
Not Applicable or Implemented. Hardwired to 0.
Not Applicable or Implemented. Hardwired to 0.
2:0
RW-O
000b
Uncore
Max Payload Size (MPS)
Default indicates 128B max supported payload for Transaction
Default indicates 128B max supported payload for Transaction
Layer Packets (TLP.).