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HPB(4) Device Drivers Manual HPB(4)

hpb
HyperTransport-PCI bridge

hpb* at pci?
pci* at hpb?

The hpb driver supports PCI-PCI bridges with HyperTransport Interrupt Capability as found in the IBM CPC945. It provides support for HyperTransport posted write interrupts.

ht(4), openpic(4), pci(4)
CPC945 Bridge and Memory Controller, User Manual, February 1, 2008.
June 3, 2015 OpenBSD-6.1