P2PHASEUP
taddr = P2PHASEUP(start, align, phase);
addr = P2PHASEUP(vbest->vs_start, align, phase);
curneeded = P2PHASEUP(ecb->dte_size,
taddr = P2PHASEUP(start, align, phase);
addr = P2PHASEUP(vbest->vs_start, align, phase);
tlo = (uintptr_t)P2PHASEUP(tlo, align, off);
tlo = (caddr_t)P2PHASEUP((uintptr_t)tlo, align, off);