pmap_make_pte
npte = pmap_make_pte(pa, prot, flags);
const pt_entry_t npte = pmap_make_pte(pa, prot, flags | PMAP_WIRED);
pmap_make_pte(pa, UVM_PROT_READ | UVM_PROT_WRITE, flags);
pmap_make_pte(src, UVM_PROT_READ, flags);
pmap_make_pte(dst, UVM_PROT_READ | UVM_PROT_WRITE, flags);