CFG_BUS_WIDTH
val &= ~CFG_BUS_WIDTH;
val |= __SHIFTIN(CFG_BUS_WIDTH_1, CFG_BUS_WIDTH);
val |= __SHIFTIN(CFG_BUS_WIDTH_4, CFG_BUS_WIDTH);
val |= __SHIFTIN(CFG_BUS_WIDTH_8, CFG_BUS_WIDTH);