LPC Interface Bridge Registers (D31:F0)
13.1.19 LPC_IBDF—IOxAPIC Bus:Device:Function
(LPC I/F—D31:F0)
Offset Address: 6Ch-6Dh
Attribute:
Size:
R/W
16 bit
Default Value:
00F8h
Bit
Description
IOxAPIC Bus:Device:Function (IBDF)— R/W. This field specifies the
bus:device:function that ICH10’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:
15:0
Bits
15:8
7:3
Description
Bus Number
Device Number
2:0
Function Number
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.
13.1.20 LPC_HnBDF – HPET n Bus:Device:Function (LPC I/F—
D31:F0)
Offset Address: H0BDF 70h-71h
H1BDF 72h-73h
H2BDF 74h-75h
H3BDF 76h-77h
H4BDF 78h-79h
H5BDF 7Ah-7Bh
H6BDF 7Ch-7Dh
H7BDF 7Eh-7Fh
00F8h
Attribute:
Size:
R/W
16 bit
Default Value:
Bit
Description
HPET n Bus:Device:Function (HnBDF)— R/W. This field specifies the
bus:device:function that ICH10’s HPET n will be using in the following:
• As the Requester ID when initiating Interrupt Messages to the CPU
• 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:
Bits
15:8
7:3
Description
Bus Number
15:0
Device Number
2:0
Function Number
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.
398
Datasheet
INTEL [ INTEL ]
