| # ex:ts=4:sw=4:sts=4:et |
| # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- |
| # |
| # This program is free software; you can redistribute it and/or modify it |
| # under the terms of the GNU General Public License as published by the Free |
| # Software Foundation; version 2 of the License |
| # |
| # This program is distributed in the hope that it will be useful, but |
| # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| # for more details. |
| # |
| # You should have received a copy of the GNU General Public License along |
| # with this program; if not, write to the Free Software Foundation, Inc., 59 |
| # Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| # |
| # AUTHOR |
| # Adrian Freihofer <adrian.freihofer (at] neratec.com> |
| |
| |
| import re |
| from wic import msger |
| |
| |
| def serial_console_form_kargs(kernel_args): |
| """ |
| Create SERIAL... line from kernel parameters |
| |
| syslinux needs a line SERIAL port [baudrate [flowcontrol]] |
| in the syslinux.cfg file. The config line is generated based |
| on kernel boot parameters. The the parameters of the first |
| ttyS console are considered for syslinux config. |
| @param kernel_args kernel command line |
| @return line for syslinux config file e.g. "SERIAL 0 115200" |
| """ |
| syslinux_conf = "" |
| for param in kernel_args.split(): |
| param_match = re.match("console=ttyS([0-9]+),?([0-9]*)([noe]?)([0-9]?)(r?)", param) |
| if param_match: |
| syslinux_conf += "SERIAL " + param_match.group(1) |
| # baudrate |
| if param_match.group(2): |
| syslinux_conf += " " + param_match.group(2) |
| # parity |
| if param_match.group(3) and param_match.group(3) != 'n': |
| msger.warning("syslinux does not support parity for console. {} is ignored." |
| .format(param_match.group(3))) |
| # number of bits |
| if param_match.group(4) and param_match.group(4) != '8': |
| msger.warning("syslinux supports 8 bit console configuration only. {} is ignored." |
| .format(param_match.group(4))) |
| # flow control |
| if param_match.group(5) and param_match.group(5) != '': |
| msger.warning("syslinux console flowcontrol configuration. {} is ignored." |
| .format(param_match.group(5))) |
| break |
| |
| return syslinux_conf |