TLBF_REF
(flags & (TLBF_LOCKED | TLBF_REF)) == 0) {
flags |= TLBF_REF;
tlb_info[tlbnext].ti_flags = (flags & ~TLBF_REF);
tlb_info[i].ti_flags = TLBF_USED | TLBF_REF;