vm_page_initfake
vm_page_initfake(&fp[i], start + PAGE_SIZE * i, memattr);
vm_page_initfake(m, paddr, memattr);
vm_page_initfake(m, va, mode); /* va is phys addr */
void vm_page_initfake(vm_page_t m, vm_paddr_t paddr, vm_memattr_t memattr);