I am newbie in this. Anybody done it?
Any lead is appreciated.
Cheers, Bud Miljkovic
-----Original Message----- From: Marek Vasut [mailto:marek.vasut@gmail.com] Sent: Wednesday, 1 February 2012 11:58 p.m. To: Wolfgang Denk Cc: u-boot@lists.denx.de; Bud Miljkovic Subject: Re: [U-Boot] Can u-Boot Ran from RAM?
Dear Marek Vasut,
In message 201202011111.09465.marek.vasut@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