LPC Interface Bridge Registers (D31:F0)
13.8.3.16 GPE_CNTL— General Purpose Control Register
I/O Address:
Default Value:
Lockable:
PMBASE +42h
00h
Attribute:
Size:
Usage:
R/W
8-bit
No
ACPI or Legacy
Power Well:
Resume
Bit
Description
8:2
Reserved
SWGPE_CTRL— R/W. This bit allows software to control the assertion of SWGPE_STS
bit. This bit is used by hardware as the level input signal for the SWGPE_STS bit in the
GPE0_STS register. When SWGPE_CTRL is 1, SWGPE_STS will be set to 1, and writes to
SWGPE_STS with a value of 1 to
1
clear SWGPE_STS will result in SWGPE_STS being set back to 1 by hardware. When
SWGPE_CTRL is 0, writes to SWGPE_STS with a value of 1 will clear SWGPE_STS to 0.
THRM#_POL — R/W. This bit controls the polarity of the THRM# pin needed to set the
THRM_STS bit.
0
0 = Low value on the THRM# signal will set the THRM_STS bit.
1 = HIGH value on the THRM# signal will set the THRM_STS bit.
13.8.3.17 DEVACT_STS — Device Activity Status Register
I/O Address:
Default Value:
Lockable:
PMBASE +44h
0000h
Attribute:
Size:
Usage:
R/WC
16-bit
No
Legacy Only
Power Well:
Core
Each bit indicates if an access has occurred to the corresponding device’s trap range, or
for bits 6:9 if the corresponding PCI interrupt is active. This register is used in
conjunction with the Periodic SMI# timer to detect any system activity for legacy power
management. The periodic SMI# timer indicates if it is the right time to read the
DEVACT_STS register (PMBASE + 44h).
Note:
Software clears bits that are set in this register by writing a 1 to the bit position.
Bit
Description
15:13 Reserved
KBC_ACT_STS — R/WC. KBC (60/64h).
0 = Indicates that there has been no access to this device’s I/O range.
1 = This device’s I/O range has been accessed. Clear this bit by writing a 1 to the bit
location.
12
11:10 Reserved
PIRQDH_ACT_STS — R/WC. PIRQ[D or H].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
9
8
PIRQCG_ACT_STS — R/WC. PIRQ[C or G].
0 = The corresponding PCI interrupts have not been active.
1 = At least one of the corresponding PCI interrupts has been active. Clear this bit by
writing a 1 to the bit location.
Datasheet
481
INTEL [ INTEL ]
