SCU_CTL
bus_space_write_4(bst, bsh_scu, SCU_CTL,
bus_space_read_4(bst, bsh_scu, SCU_CTL) | SCU_CTL_SCU_ENA);
uint32_t scu_ctl = bus_space_read_4(bst, scu_bsh, SCU_CTL);
bus_space_write_4(bst, scu_bsh, SCU_CTL, scu_ctl);
bus_space_write_4(bst, bsh, SCU_CTL,
bus_space_read_4(bst, bsh, SCU_CTL) | SCU_CTL_SCU_ENA);
val = bus_space_read_4(bst, scu_bsh, SCU_CTL);
bus_space_write_4(bst, scu_bsh, SCU_CTL, val);
val = bus_space_read_4(bst, bsh, SCU_CTL);
bus_space_write_4(bst, bsh, SCU_CTL, val | SCU_CTL_SCU_ENA);
bcm53xx_armcore_bsh, ARMCORE_SCU_BASE + SCU_CTL);
ARMCORE_SCU_BASE + SCU_CTL, scu_ctl);