EP80579 Datasheet, PDF (901/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
24.2.1.9
Offset 20h: SM_BASE: SMB Base Address Register
SM_BASE sets the base address in I/O space for the SMBus I/O registers (see Section
24.3, “SMBus Controller I/O-Mapped Configuration Register Details” on page 905).
These registers can be mapped anywhere in the I/O space on 32-byte boundaries.
Table 24-11. Offset 20h: SM_BASE: SMB Base Address Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:31:3
Offset Start: 20h
Offset End: 23h
Size: 32 bit
Default: 00000001h
Power Well: Resume
Bit Range Bit Acronym
Bit Description
31 : 16
15 : 05
04 : 01
00
Reserved
BASE_AD
Reserved
IOSI
Reserved
Base Address: Provides the 32 byte system I/O base
address for the SMB logic.
Reserved
I/O Space Indicator: This read-only bit always is 1,
indicating that the SMB logic is I/O mapped.
Sticky
Bit Reset
Value
0h
0h
0h
1
Bit Access
RW
RO
24.2.1.10 Offset 2Ch: SVID: SVID Register
BIOS sets the value in this register to identify the Subsystem Vendor ID. The SMBus
SVID register, in combination with the SMBus Subsystem ID register, enables the
operating system to distinguish each subsystem from the others.
Note:
The software can write to this register only once per core well reset. Writes must be
done as a single 16-bit cycle.
Table 24-12. Offset 2Ch: SVID: SVID Register
Description:
View: PCI
BAR: Configuration
Bus:Device:Function: 0:31:3
Offset Start: 2Ch
Offset End: 2Dh
Size: 16 bit
Default: 0000h
Power Well: Core
Bit Range
15 : 00
Bit Acronym
Bit Description
Sticky
SVID
Subsystem Vendor ID: The SVID register, in combination
with the Subsystem ID (SID) register, enables the
operating system (OS) to distinguish subsystems from
each other.
Note: Software can write to this register only once per
core well reset. Writes must be done as a single
16-bit cycle.
Bit Reset
Value
00h
Bit Access
RWO
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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