UN_REG            390 arch/powerpc/include/asm/pmac_feature.h #define UN_IN(r)	(in_be32(UN_REG(r)))
UN_REG            391 arch/powerpc/include/asm/pmac_feature.h #define UN_OUT(r,v)	(out_be32(UN_REG(r), (v)))
UN_REG           2581 arch/powerpc/platforms/powermac/feature.c 	uninorth_rev = in_be32(UN_REG(UNI_N_VERSION));