cvs commit: src/sys/amd64/pci pci_cfgreg.c src/sys/i386/pci
jhb at FreeBSD.org
Wed Sep 10 20:13:28 UTC 2008
On Wednesday 10 September 2008 02:06:08 pm John Baldwin wrote:
> jhb 2008-09-10 18:06:08 UTC
> FreeBSD src repository
> Modified files:
> sys/amd64/pci pci_cfgreg.c
> sys/i386/pci pci_cfgreg.c
> SVN rev 182910 on 2008-09-10 18:06:08Z by jhb
> Some K8 chipsets don't expose all of the PCI devices on bus 0 via PCIe
> memory-mapped config access. Add a workaround for these systems by
> checking the first function of each slot on bus 0 using both the
> memory-mapped config access and the older type 1 I/O port config access.
> If we find a slot that is only visible via the type 1 I/O port config
> access, we flag that slot. Future PCI config transactions to flagged
> slots on bus 0 use type 1 I/O port config access rather than memory mapped
> config access.
Linux has a similar hack^Wworkaround.
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