GDROM_DATA_REG
data[c] = __raw_readw(GDROM_DATA_REG);
outsw(GDROM_DATA_REG, cmd, 6);
insw(GDROM_DATA_REG, toc, tocsize/2);
insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);
outsw(GDROM_DATA_REG, &read_command->cmd, 6);