Date: Tue, 25 Oct 2005 04:53:29 +0000 (UTC) From: Bill Paul <wpaul@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/pci pci_cfgreg.c src/sys/amd64/pci pci_cfgreg.c Message-ID: <200510250453.j9P4rTJk085860@repoman.freebsd.org>
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wpaul 2005-10-25 04:53:29 UTC
FreeBSD src repository
Modified files:
sys/i386/pci pci_cfgreg.c
sys/amd64/pci pci_cfgreg.c
Log:
Modify the pci_cfgdisable() routine to bring it more in line with
other OSes (Solaris, Linux, VxWorks). It's not necessary to write a 0
to the config address register when using config mechanism 1 to turn
off config access. In fact, it can be downright troublesome, since it
seems to confuse the PCI-PCI bridge in the AMD8111 chipset and cause
it to sporadically botch reads from some devices. This is the cause
of the missing USP ports problem I was experiencing with my Sun Opteron
system.
Also correct the case for mechanism 2: it's only necessary to write
a 0 to the ENABLE port.
Revision Changes Path
1.109 +6 -2 src/sys/amd64/pci/pci_cfgreg.c
1.117 +7 -3 src/sys/i386/pci/pci_cfgreg.c
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