Datasheet

Gigabit LAN Configuration Registers
Intel® Xeon® Processor D-1500 Product Family 235
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
6.1.30 MDAT—Message Data Register (Gigabit LAN—D25:F0)
Address Offset: DCh–DDh Attribute: R/W
Default Value: See bit description Size: 16 bits
6.1.31 FLRCAP—Function Level Reset Capability (Gigabit LAN—
D25:F0)
Address Offset: E0h–E1h Attribute: RO
Default Value: 0009h Size: 16 bits
6.1.32 FLRCLV—Function Level Reset Capability Length and
Version Register (Gigabit LAN—D25:F0)
Address Offset: E2h–E3h Attribute: R/WO, RO
Default Value: See Description. Size: 16 bits
Function Level Reset: No (Bits 9:8 Only When FLRCSSEL = 0)
When FLRCSSEL = 0, this register is defined as follows:
When FLRCSSEL = 1, this register is defined as follows:
Bit Description
31:0 Message Data (MDAT) — R/W. Written by the system to indicate the lower 16 bits of the data
written in the MSI memory write DWord transaction. The upper 16 bits of the transaction are written
as 0000h.
Bit Description
15:8 Next Pointer — RO. This field provides an offset to the next capability item in the capability list. The
value of 00h indicates the last item in the list.
7:0 Capability ID — RO. The value of this field depends on the FLRCSSEL bit.
13h = If FLRCSSEL = 0
09h = If FLRCSSEL = 1, indicating vendor specific capability.
FLRCSSEL is located at RCBA + 3410(bit 12). See Chapter 10-Chipset Configuration Registers.
Bit Description
15:10 Reserved
9 Function Level Reset Capability — R/WO.
1 = Support for Function Level Reset.
This bit is not reset by Function Level Reset.
8 TXP Capability — R/WO.
1 = Indicates support for the Transactions Pending (TXP) bit. TXP must be supported if FLR is
supported.
7:0 Capability Length — RO. The value of this field indicates the number of bytes of the vendor specific
capability as require by the PCI specification. It has the value of 06h for the Function Level Reset
capability.
Bit Description
15:12 Vendor Specific Capability ID — RO. A value of 2h in this field identifies this capability as Function
Level Reset.
11:8 Capability Version— RO. The value of this field indicates the version of the Function Level Reset
Capability. Default is 0h.
7:0 Capability Length — RO. The value of this field indicates the number of bytes of the vendor specific
capability as require by the PCI specification. It has the value of 06h for the Function Level Reset
capability.