MESON_AOBUS_PWR_MEM_PD0_REG
mempd0 = bus_space_read_4(bst, ao_bsh, MESON_AOBUS_PWR_MEM_PD0_REG);
bus_space_write_4(bst, ao_bsh, MESON_AOBUS_PWR_MEM_PD0_REG, mempd0);