[U-Boot] Porting YAFFS2 to U-boot
Bud Miljkovic
Bud_Miljkovic at trimble.com
Thu Feb 2 22:40:45 CET 2012
I am newbie in this. Anybody done it?
Any lead is appreciated.
Cheers,
Bud Miljkovic
-----Original Message-----
From: Marek Vasut [mailto:marek.vasut at gmail.com]
Sent: Wednesday, 1 February 2012 11:58 p.m.
To: Wolfgang Denk
Cc: u-boot at lists.denx.de; Bud Miljkovic
Subject: Re: [U-Boot] Can u-Boot Ran from RAM?
> Dear Marek Vasut,
>
> In message <201202011111.09465.marek.vasut at gmail.com> you wrote:
> > > On Monday 30 January 2012 23:07:05 Bud Miljkovic wrote:
> > > > While getting acquainted with possible u-Boot development
issues, I
> > > > read FAQ "14.2.1. Can U-Boot be configured such that it can be
> > > > started in RAM?" and was puzzled to learn that u-Boot cannot run
> > > > from RAM.
> > >
> > > you misread it. the question is for people who have loaded
u-boot, and
> > > then want to load another copy of u-boot into ram and then execute
that
> > > directly.
> > >
> > > so the question is "can u-boot be *started in ram*" and the answer
is
> > > "no".
> >
> > The answer is "yes if you know how to do it" ;-)
>
> The answer is "NO". You cannot load the _normal_ U-Boot image to RAM
> and start it. You must prepare a _special_ image which omits all the
> initializations that are normally included.
You can on PXA ;-)
>
> This FAQ addresses the situation where people want to load and run
> their _normal_ images before burning these to flash. And this CANNOT
> be done like that.
You're certainly right this is true for general case, but there are
special
cases where you can load u-boot from u-boot without any harm (PXA is the
example).
>
> Best regards,
>
> Wolfgang Denk
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