82NM10 Datasheet, PDF (433/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

LPC Interface Bridge Registers (D31:F0)
Bit
Description
2
BIOS_STS — R/WC.
0 = No SMI# generated due to ACPI software requesting attention.
1 = This bit gets set by hardware when a 1 is written by software to the
GBL_RLS bit (D31:F0:PMBase + 04h:bit 2). When both the BIOS_EN bit
(D31:F0:PMBase + 30h:bit 2) and the BIOS_STS bit are set, an SMI# will be
generated. The BIOS_STS bit is cleared when software writes a 1 to its bit
position.
1:0
Reserved
13.8.3.14 ALT_GP_SMI_EN—Alternate GPI SMI Enable Register
I/O Address:
Default Value:
Lockable:
Power Well:
PMBASE +38h
0000h
No
Resume
Attribute:
Size:
Usage:
R/W
16-bit
ACPI or Legacy
Bit
Description
15:0
Alternate GPI SMI Enable — R/W. These bits are used to enable the corresponding
GPIO to cause an SMI#. For these bits to have any effect, the following must be true.
• The corresponding bit in the ALT_GP_SMI_EN register is set.
• The corresponding GPI must be routed in the GPI_ROUT register to cause an SMI.
• The corresponding GPIO must be implemented.
NOTE: Mapping is as follows: bit 15 corresponds to GPIO15... bit 0 corresponds to
GPIO0.
13.8.3.15 ALT_GP_SMI_STS—Alternate GPI SMI Status Register
I/O Address:
Default Value:
Lockable:
Power Well:
PMBASE +3Ah
0000h
No
Resume
Attribute:
Size:
Usage:
R/WC
16-bit
ACPI or Legacy
Bit
Description
15:0
Alternate GPI SMI Status — R/WC. These bits report the status of the corresponding
GPIOs.
0 = Inactive. Software clears this bit by writing a 1 to it.
1 = Active
These bits are sticky. If the following conditions are true, then an SMI# will be
generated and the GPE0_STS bit set:
• The corresponding bit in the ALT_GPI_SMI_EN register (PMBASE + 38h) is set
• The corresponding GPIO must be routed in the GPI_ROUT register to cause an SMI.
• The corresponding GPIO must be implemented.
All bits are in the resume well. Default for these bits is dependent on the state of the
GPIO pins.
Datasheet
433