Datasheet

LPC Interface Bridge Registers (D31:F0)
248 Intel® Xeon® Processor D-1500 Product Family
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
7.1.20 LPC_IBDF—IOxAPIC Bus:Device:Function (LPC I/F—
D31:F0)
Offset Address: 6Ch–6Dh Attribute: R/W
Default Value: 00F8h Size: 16 bits
7.1.21 LPC_HnBDF—HPET n Bus:Device:Function (LPC I/F—
D31:F0)
Address Offset H0BDF 70h–71h
H1BDF 72h–73h
H2BDF 74h–75h
H3BDF 76h–77h
H4BDF 78h–79h
H5BDF 7Ah–7Bh
H6BDF 7Ch–7Dh
H7BDF 7Eh–7Fh Attribute: R/W
Default Value: 00F8h Size: 16 bits
Bit Description
15:0 IOxAPIC Bus:Device:Function (IBDF)— R/W. this field specifies the bus:device:function that
Intel® Xeon® Processor D-1500 Product Family’s IOxAPIC will be using for the following:
• As the Requester ID when initiating Interrupt Messages to the processor.
• As the Completer ID when responding to the reads targeting the IOxAPIC’s Memory-Mapped I/O
registers.
The 16-bit field comprises the following:
This field defaults to Bus 0: Device 31: Function 0 after reset. BIOS can program this field to provide
a unique bus:device:function number for the internal IOxAPIC.
Bits Description
15:8 Bus Number
7:3 Device Number
2:0 Function Number
Bit Description
15:0 HPET n Bus:Device:Function (HnBDF)— R/W. This field specifies the bus:device:function that
Intel® Xeon® Processor D-1500 Product Family’s HPET n will be using in the following:
• As the Requester ID when initiating Interrupt Messages to the processor
• As the Completer ID when responding to the reads targeting the corresponding HPET’s Memory-
Mapped I/O registers
The 16-bit field comprises the following:
This field is default to Bus 0: Device 31: Function 0 after reset. BIOS shall program this field
accordingly if unique bus:device:function number is required for the corresponding HPET.
Bits Description
15:8 Bus Number
7:3 Device Number
2:0 Function Number