ICHPCIB(4) - Device Drivers Manual (i386) #
ICHPCIB(4) - Device Drivers Manual (i386)
NAME #
ichpcib - Intel ICHx/ICHx-M LPC bridges
SYNOPSIS #
ichpcib* at pci? isa* at ichpcib?
DESCRIPTION #
The
ichpcib
driver supports Intel
ICH,
ICH0,
ICH2,
ICH2-M,
ICH3-S,
ICH3-M,
ICH4,
ICH4-M,
ICH5,
ICH6,
ICH7,
ICH7-M,
ICH8,
ICH8-M,
ICH9,
6300ESB
and
6321ESB
LPC bridges.
These devices are mostly usual
PCI-ISA
bridges but with some additional power management and monitoring
capabilities.
Besides the core functionality, the
ichpcib
driver provides support for the Intel SpeedStep technology, available
for the
ICH2-M,
ICH3-M,
and
ICH4-M
chipsets, and power management timer available for all chipsets.
It allows the user to control CPU frequency with the
sysctl(8)
program.
SEE ALSO #
cpu(4), intro(4), isa(4), pci(4), sysctl(8)
HISTORY #
Intel SpeedStep support for the ICHx-M chipsets first appeared in OpenBSD 3.5 as part of the pcib(4) driver. The ichpcib driver first appeared in OpenBSD 3.6.
AUTHORS #
The ichpcib driver was written by Alexander Yurchenko <grange@openbsd.org>.
CAVEATS #
On some old machines with the
ICH2-M
chipset, Intel SpeedStep isn’t available.
OpenBSD 7.5 - July 16, 2013