cvs commit: src/sys/i386/include pci_cfgreg.h

[Nate Lawson]

On Thu, 18 Sep 2003, John Baldwin wrote:
>   Modified files:
>     sys/i386/include     pci_cfgreg.h
>   Log:
>   Fix a busted constant related to PCI configuration acess method #1.  The
>   reserved bits in the port that must be zero are 24:30, not 20:30.  Bits
>   16:23 are used to set the bus number.  This meant that when we tested for
>   config mechanism #1, if the previous PCI configuration transaction sent
>   used a bus number greater than 15, one of the bits in 20:23 would be
>   non-zero and we would fail to use config mechanism #1 and thus fail to see
>   that PCI existed on the machine at all.
>
>   Obtained from:  Shanley's PCI System Architecture book
>   Tested by:      des
>   Proxied through:        njl
>
>   Revision  Changes    Path
>   1.10      +1 -1      src/sys/i386/include/pci_cfgreg.h

Excellent!

-Nate