From: Andreas Schweigstill <andreas@schweigstill.de>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] how to make a core uboot?
Date: Mon, 28 Apr 2008 11:51:29 +0200 [thread overview]
Message-ID: <48159E21.70205@schweigstill.de> (raw)
In-Reply-To: <3a665c760804280122k722847f4r62591478d9ba6117@mail.gmail.com>
Hello!
loody mil schrieb:
> I intend to make a pure uboot, without including any driver but only
> basic cpu setting and uboot commands supported. But I cannot see any
> config option in Makefile.
If you need a really minimalistic bootloader U-Boot will not be the
first choice. The smallest possible U-Boot will be around 100KByte in
size and contain much more than just basic CPU initialisation.
> I know I may choose any config in boards and truncate those things I
> don't need at all.
That's the right way if you want to use U-Boot.
> But I send this mail and want to know is there already a config option
> or some fast way I can meet my requirement?
Nobody knows what are you requirements. If you need a really
minimalistic bootloader you should take a look at some sample
initialization code from the processor manufacturer.
On certain platforms (e.g. Atmel AT91) even U-Boot will just be used as
a second or third level bootloader. The basic CPU setup has been done
before starting U-Boot.
With best regards
Andreas Schweigstill
--
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/
next prev parent reply other threads:[~2008-04-28 9:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-28 8:22 [U-Boot-Users] how to make a core uboot? loody mil
2008-04-28 9:51 ` Andreas Schweigstill [this message]
2008-04-28 19:24 ` [U-Boot-Users] how to make a core uboot? (Comments about AT91 BMS) Ken.Fuchs at bench.com
2008-04-28 21:37 ` Wolfgang Denk
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