sbdp_get_mem_dip
sbdp_walk_prom_tree(prom_rootnode(), sbdp_get_mem_dip, &smd);
(void) sbdp_walk_prom_tree(prom_rootnode(), sbdp_get_mem_dip, &arg);
sbdp_walk_prom_tree(prom_rootnode(), sbdp_get_mem_dip, &arg);