From: Wolfgang Denk <wd@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] U-Boot and Nand Flash
Date: Thu, 09 Sep 2004 20:10:47 +0200 [thread overview]
Message-ID: <20040909181052.00E7FC1430@atlas.denx.de> (raw)
In-Reply-To: Your message of "Thu, 09 Sep 2004 10:55:35 PDT." <963b3387040909105576176dee@mail.gmail.com>
In message <963b3387040909105576176dee@mail.gmail.com> you wrote:
>
> > U-Boot will NOT fit into a 16 kB block. And U-Boot cannot be made to
> > boot directly from such a block. You will need to implement a
> > different loader.
>
> So I guess that my best option would be to use a small primary
> bootloader to boot U-Boot from RAM.
Indeed.
> If I am reading everything correctly, I should have to change the
> reset and start locations (.resetvec and .bootpg) along with the setup
> of the MMU (as all TLB Entries are cleared currently.)
Remember that U-Boot does not use virtual memory.
> I'm probably missing other steps that are required, I'll be looking at
> the startup code in more detail.
Indeed. You will ahve to re-invent all CPU and memory controller init
stuff in your primary bootstrap loader, and disable them in U-Boot.
It's serious surgery...
Best regards,
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
-- Isaac Asimov
next prev parent reply other threads:[~2004-09-09 18:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-08 21:47 [U-Boot-Users] U-Boot and Nand Flash Bradley Remedios
[not found] ` <20040908222959.65920.qmail@web11701.mail.yahoo.com>
2004-09-08 23:18 ` Bradley Remedios
2004-09-09 0:20 ` Wolfgang Denk
2004-09-09 17:55 ` Bradley Remedios
2004-09-09 18:10 ` Wolfgang Denk [this message]
2004-09-23 6:55 ` Markus Pietrek
2004-09-23 15:05 ` Wolfgang Denk
2004-10-29 7:44 ` Markus Pietrek
2004-10-29 16:06 ` Wolfgang Denk
2004-09-09 0:15 ` Wolfgang Denk
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