SPU2_IV_LEN
iv_len = (ctrl1 & SPU2_IV_LEN) >> SPU2_IV_LEN_SHIFT;
ciph_iv_len = (ctrl1 & SPU2_IV_LEN) >> SPU2_IV_LEN_SHIFT;
ctrl1 |= ((cipher_iv_len << SPU2_IV_LEN_SHIFT) & SPU2_IV_LEN);