SH4_MMUCR_URB_SHIFT
(r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT);
urb = (r & SH4_MMUCR_URB_MASK) >> SH4_MMUCR_URB_SHIFT;
eend = a ? (a >> SH4_MMUCR_URB_SHIFT) : SH4_UTLB_ENTRY;
(SH4_UTLB_ENTRY - UPAGES) << SH4_MMUCR_URB_SHIFT);