pmap_pagetree_nentries_range
pmap_pagetree_nentries_range(va, va+sz, NBPD_L4);
nL4e = pmap_pagetree_nentries_range(startva, endva, NBPD_L4);
nL3e = pmap_pagetree_nentries_range(startva, endva, NBPD_L3);
nL2e = pmap_pagetree_nentries_range(startva, endva, NBPD_L2);
nL1e = pmap_pagetree_nentries_range(startva, endva, NBPD_L1);
nL4e = pmap_pagetree_nentries_range(startva, endva, NBPD_L4);
nL3e = pmap_pagetree_nentries_range(startva, endva, NBPD_L3);
nL2e = pmap_pagetree_nentries_range(startva, endva, NBPD_L2);