Date: Thu, 15 Apr 2010 21:28:30 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-hackers@freebsd.org, ticso@cicely.de Subject: Re: disabling all serial input / output at boot time Message-ID: <20100415192830.GE31933@cicely7.cicely.de> In-Reply-To: <20100415192524.GD31933@cicely7.cicely.de> References: <201004141357.o3EDvuxt067902@lava.sentex.ca> <20100415173659.GB31933@cicely7.cicely.de> <201004151745.o3FHjXI2077062@lava.sentex.ca> <20100415190405.GC31933@cicely7.cicely.de> <20100415192524.GD31933@cicely7.cicely.de>
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On Thu, Apr 15, 2010 at 09:25:24PM +0200, Bernd Walter wrote: > On Thu, Apr 15, 2010 at 09:04:05PM +0200, Bernd Walter wrote: > > On Thu, Apr 15, 2010 at 01:45:36PM -0400, Mike Tancsa wrote: > > > At 01:36 PM 4/15/2010, Bernd Walter wrote: > > > > > > >Is the sensor prohibiting the use of USB RS232 in any way? > > > > > > Just our wallets :) Extra cost to include it and the case would need > > > to change as well as its in an environment where it can get hit by water. > > > > Ok - that's an understandable reason. > > > > The unfortunate thing is that the bootcode reacts on buffered input > > and the BIOS might already have buffered some bytes. > > This has nothing to do with FreeBSDs knowledge about comconsole because > > the BIOS translates it. > > IIRC the Soekris BIOS has an option to disable the SIO support, maybe > > your board has something similar. > > Otherwise this means you need to disable the bootcode (including boot0) > > to process any kind of input. > > Ups - I ment boot2 and not boot0 - you likely don't install boot0. For boot2 take a look into sys/boot/i386/boot2/boot2.c xgetc function. I assume it is all you need to chnage. > > > This shouldn't be too hard to code since the code is well documented. > > It happens in at least boot0 and loader - the later likely can be > > handled by using a customized loader.rc script, which wraps to > > nullconsole. > > > > -- > > B.Walter <bernd@bwct.de> http://www.bwct.de > > Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm. > > _______________________________________________ > > freebsd-hackers@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > > -- > B.Walter <bernd@bwct.de> http://www.bwct.de > Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm. > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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