ptp_va2o
pg = uvm_pagelookup(&pmap->pm_obj[lidx], ptp_va2o(va, level));
ptp = uvm_pagealloc(obj, ptp_va2o(va, i - 1), NULL,
ptp = uvm_pagealloc(obj, ptp_va2o(gpa, 3), NULL,
ptp = uvm_pagealloc(obj, ptp_va2o(gpa, 2), NULL,
ptp = uvm_pagealloc(obj, ptp_va2o(gpa, 1), NULL,
ptp_va2o(va, level), NULL,