linux-kernel - RE: kernel porting query

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Message-Id: <1171618362.23981.10.camel@tara.firmix.at>
Date:	Fri, 16 Feb 2007 10:32:42 +0100
From:	Bernd Petrovitsch <bernd@...mix.at>
To:	"Ajay Singh (ajaysi)" <ajaysi@...co.com>
Cc:	Rick Brown <rick.brown.3@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	kernelnewbies <kernelnewbies@...linux.org>,
	linux-newbie@...r.kernel.org
Subject: RE: kernel porting query

On Fri, 2007-02-16 at 07:46 +0530, Rick Brown wrote:

Your quoting style sucks. I fixed it by hand.
 
[...]
> > 1) Can any one please shed some light on precisely and exactly what are
> > differences in different boards for which we need to port linux?

> On Fri, 2007-02-16 at 09:48 +0530, Ajay Singh (ajaysi) wrote:
> The differences depends on the boards ... Mostly if they belong to the
> same family the differences could be mainly in the peripherials ...
> Interrupt mappings... Serial interface ... Memory sizes (if differnet
> boards have different memory sizes) ... Sometimes some devices may be
> moved to some other locations in the memory map (Look at memory map of
> your SoC on your board). 

You may have different boot loaders (or none at all).
You also may have different storage media like FlashRAM, IDE,
network, .... for boot loader/kernel/root filesystem. They may have
different sizes and it makes a "little" difference for your requirements
in the toolchain if you have 4MB or 1GB to boot your system from.

All that kind of information can be found in a BSP (board support
package).

	Bernd
-- 
Firmix Software GmbH                   http://www.firmix.at/
mobil: +43 664 4416156                 fax: +43 1 7890849-55
          Embedded Linux Development and Services

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