bktr_reg_t
static bool_t notclipped (bktr_reg_t * bktr, int x, int width) {
static bool_t getline(bktr_reg_t *bktr, int x) {
static bool_t split(bktr_reg_t * bktr, volatile u_int **dma_prog, int width ,
static bool_t getline(bktr_reg_t *, int);
static bool_t notclipped(bktr_reg_t * , int , int);
static bool_t split(bktr_reg_t *, volatile u_int **, int, u_int, int,
static bktr_reg_t brooktree[NBKTR];