NetBSD master CVS tree commits

[source%NetBSD.ORG@localhost]

pk
Sat Jan 24 08:22:48 PST 1998
Update of /cvsroot/src/sys/arch/sparc/sparc
In directory netbsd1:/var/slash-tmp/cvs-serv22364

Modified Files:
        iommureg.h 
Log Message:
After writing to the IOMMU flush registers, read something back from
IOMMU control space to a flush register to drain internal write buffers (?).
This avoids utter lossage on some machines (SS4s & SS5s) where our caller
would see some of its local (`%lx') registers trashed. This is probably
caused by a silicon bug allowing interference on internal data paths..