Re: [U-Boot-Users] Start with u-boot on at91rm9200 on AT91RM9200-EK
Hello Wolfgang, AFAIK the AT91RM9200 Boot Sequence only allows 16k-4k size for the first Programm, E.g. the loader.bin. The u-boot.bin ist about 92k, so it cant't be loaded directly. First the loader.bin ist executed which initializes the external SDRAM an it then loads u-boot.bin to external SDRAM. How can the u-boot be configured to be used so, i didn't find any hints. THX Thomas
-----Ursprüngliche Nachricht----- Von: wd@denx.de [mailto:wd@denx.de] Gesendet: Mittwoch, 19. Juli 2006 09:39 An: Erdmann, Thomas Cc: u-boot-users@lists.sourceforge.net Betreff: Re: AW: AW: [U-Boot-Users] Start with u-boot on at91rm9200 on AT91RM9200-EK
In message <F6726C3E89A64840A5E10310E342A38F01BE93CA@xchback01.back.harti ng.intra> you wrote:
for the first step of reproducing a runnig u-boot i use the
original
Atmel Board. Here the u-boot does nothing after load with loader.bin. The Atmel delivered u-boot.bin does normal work. U-boot is build with the desribed steps without any Error Messages.
make at91rm9200dk_config make all
What makes you think the default configuration of U-Boot would need any loader.bin stuff? Instead, it will boot directly.
Best regards,
Wolfgang Denk
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de Wisdom is one of the few things that looks bigger the further away it is. - Terry Pratchett, _Witches Abroad_
In message F6726C3E89A64840A5E10310E342A38F01BE93CB@xchback01.back.harting.intra you wrote:
AFAIK the AT91RM9200 Boot Sequence only allows 16k-4k size for the first Programm, E.g. the loader.bin. The u-boot.bin ist about 92k, so it cant't be loaded directly. First the loader.bin ist executed which initializes the external SDRAM an it then loads u-boot.bin to external SDRAM. How can the u-boot be configured to be used so, i didn't find any hints.
U-Boot boots from NOR flash, where no such restriction exists. Also please note that the existing code is for the at91rm9200dk, not the ek (not sure if this matters, though).
Best regards,
Wolfgang Denk
Erdmann, Thomas ha scritto:
Hello Wolfgang, AFAIK the AT91RM9200 Boot Sequence only allows 16k-4k size for the first Programm, E.g. the loader.bin. The u-boot.bin ist about 92k, so it cant't be loaded directly. First the loader.bin ist executed which initializes the external SDRAM an it then loads u-boot.bin to external SDRAM. How can the u-boot be configured to be used so, i didn't find any hints. THX Thomas
Maybe you haven't searched enough ;-) see http://www.koansoftware.com/en/art.php?cat=4 and http://www.koansoftware.com/en/art.php?art=80
HTH
Ciao
participants (3)
-
Erdmann, Thomas -
Marco Cavallini -
Wolfgang Denk