COM_REG_USR
[COM_REG_USR] = MIO_UART_USR_OFFSET,
(CSR_READ_1(regsp, COM_REG_USR) & 0x1) != 0; timeout--) {
(void)CSR_READ_1(regsp, COM_REG_USR);
} else if ((CSR_READ_1(regsp, COM_REG_USR) & 0x1) != 0) {
CSR_READ_1(regsp, COM_REG_USR));
(void)CSR_READ_1(regsp, COM_REG_USR);
[COM_REG_USR] = com_usr,