Date: Wed, 28 Nov 2007 22:20:08 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/amd64/include pci_cfgreg.h src/sys/amd64/pci pci_cfgreg.c src/sys/i386/pci pci_cfgreg.c Message-ID: <200711282220.lASMK9GR052029@repoman.freebsd.org>
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jhb 2007-11-28 22:20:08 UTC
FreeBSD src repository
Modified files:
sys/amd64/include pci_cfgreg.h
sys/amd64/pci pci_cfgreg.c
sys/i386/pci pci_cfgreg.c
Log:
Adjust the code to probe for the PCI config mechanism to use.
- On amd64, just assume type #1 is always used. PCI 2.0 mandated
deprecated type #2 and required type #1 for all future bridges which
was well before amd64 existed.
- For i386, ignore whatever value was in 0xcf8 before testing for type #1
and instead rely on the other tests to determine if type #1 works. Some
newer machines leave garbage in 0xcf8 during boot and as a result the
kernel doesn't find PCI at all (which greatly confuses ACPI which expects
PCI to exist when PCI busses are in the namespace).
MFC after: 3 days
Discussed with: scottl
Revision Changes Path
1.14 +0 -5 src/sys/amd64/include/pci_cfgreg.h
1.110 +11 -167 src/sys/amd64/pci/pci_cfgreg.c
1.125 +25 -25 src/sys/i386/pci/pci_cfgreg.c
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