[U-Boot-Users] Re: My 3 patches

Wolfgang Denk wd at denx.de
Tue Sep 6 10:49:59 CEST 2005

In message <20050906012549.M16097 at gd-linux.com> you wrote:
> How about my 3 patches? I'm looking forward to your reply. Thanks.

They are sitting in my queue waiting to be  reviewed  and  eventually
applied or rejected. Please be patient.

> Here is a manual webpage for SBC-2410X (in Chinese):
> http://www.arm9.net/matrix-v.asp

Is there an English manual, too?

> Recently, I am working on making U-Boot boot from nand on SBC-2410X board. Do
> you think it is meaningful? In my opinion, nand flash has at least advantages

This can be an issue if you have really high volumes of  your  boards
and   try   to  minimize  the  production  cost  at  the  expense  of

> ¡®Steppingstone¡¯. When booting, the first 4
> KBytes of the NAND flash memory will be loaded into Steppingstone and the boot
> code loaded into
> Steppingstone will be executed."

Here you see the problem: you will need a separate first stage loader
to do all the low level initializations and then load U-Boot  to  RAM
like  it  has  been  implemented  on  some  other systems before. The
probelm is that all  comfort  you  have  witrh  U-Boot  during  board
bringup and U-Bootporting gets lost this way.

> Correspondingly, YAFFS, a NAND-flash friendly filing system, will be a good
> choice to be added into U-Boot.

Feel free to submit patches.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
We have found all life forms in the galaxy are  capable  of  superior
	-- Kirk, "The Gamesters of Triskelion", stardate 3211.7

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