[U-Boot-Users] Re: Patch s3c2410 nand-boot.
wd at denx.de
Fri Sep 19 22:14:44 CEST 2003
in message <3F6AD744.1030107 at elsoft.ch> you wrote:
> So a multi stage boot process has to be implemented. After reset,
> hardware loads a tiny piece of code from the first two blocks of the
> NAND flash. This code has to do:
> - minimial initialisation of CPU
> - initialisation of SDRAM and NAND flash
> - copy rest of boot code (U-Boot) from NAND to SDRAM while taking
> care of bad blocks
> - jump to an appropriate place to give up control to rest of boot code
In my opinion, such a "primary boot loader" should be completely
independend of U-Boot, i. e. you shouldbe able to use it to load any
other boot loader as well, and the U-Boot code itself should only
need minimal adjustment.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
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