ICHPCIB(4) BSD Programmer's Manual ICHPCIB(4)
ichpcib - Intel ICHx/ICHx-M LPC bridges
ichpcib* at pci? dev ? function ? isa* at ichpcib?
The ichpcib driver supports Intel ICH, ICH0, ICH2, ICH2-M, ICH3-S, ICH3- M, ICH4, ICH4-M, and ICH-5 LPC bridges. These devices are mostly usual PCI-ISA bridges but with some additional power management and monitoring capabilities. Besides the core pcib(4) functionality, the ichpcib driver provides support for the Intel SpeedStep technology, available for the ICH2-M, ICH3-M, and ICH4-M chipsets. It allows the user to control CPU frequency with the sysctl(8) program.
cpu(4), intro(4), isa(4), pci(4), pcib(4), sysctl(8)
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 ap- peared in OpenBSD 3.6.
The ichpcib driver was written by Alexander Yurchenko <email@example.com>.
On some old machines with the ICH2-M chipset, Intel SpeedStep isn't available. MirOS BSD #10-current March 31, 2004 1
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