K 10
svn:author
V 6
grehan
K 8
svn:date
V 27
2005-10-30T21:29:59.000000Z
K 7
svn:log
V 362
Copy SPRG0-3 registers at boot-time and restore when calling into
OpenFirmware. FreeBSD/ppc uses SPRG0 as the per-cpu data area pointer,
and SPRG1-3 as temporary registers during exception handling. There
have been a few instances where OpenFirmware does require these to
be part of it's context, such as cd-booting an eMac.

reported by:	many
MFC after:	3 days

END