Re: [U-Boot-Users] Start with u-boot on at91rm9200 on AT91RM9200-EK
Hello Wolfgang, that is an important Information: The original u-boot is build for running out of the NOR -Flash and not for serial Download and run out of RAM - did i understand correctly ? The Atmel Evaluation Board Docs describe a way of A) X-Modem a loader.bin to RAM and start it B) X-Modem an u-boot.bin to RAM and start it C) Kermit with this boot.bin and flash this with u-boot D) Kermit a u-boot.gz and flash this
After configuring the cpu to "boot external" it then runs out of the flash.
The Atmel Docs also write to generate the binary only delivered Files the two steps: 1) Patch the Source for Support of the soldered Flash Chip 2) Compile it
But with your words, if i do so only a Version of u-boot for direct flashing to the NOR Flash Chip is generated.
Is there a way to generate an u-boot Version for the Way Atmel describes in any Version or have i to ask Atmel how they patched their Version ?
THX Thomas
-----Ursprüngliche Nachricht----- Von: wd@denx.de [mailto:wd@denx.de] Gesendet: Mittwoch, 19. Juli 2006 10:35 An: Erdmann, Thomas Cc: u-boot-users@lists.sourceforge.net Betreff: Re: AW: AW: AW: [U-Boot-Users] Start with u-boot on at91rm9200 on AT91RM9200-EK
In message <F6726C3E89A64840A5E10310E342A38F01BE93CB@xchback01.back.harti ng.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
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "The good Christian should beware of mathematicians and all those who make empty prophecies. The danger already exists that mathematicians have made a covenant with the devil to darken the spirit and confine man in the bonds of Hell." - Saint Augustine
Thomas,
can you please fix your mailer? Your subject line
Subject: AW: AW: AW: AW: [U-Boot-Users] ...
violates RFC850 ...
In message F6726C3E89A64840A5E10310E342A38F01BE93CD@xchback01.back.harting.intra you wrote:
The original u-boot is build for running out of the NOR -Flash and not for serial Download and run out of RAM - did i understand correctly ?
Yes.
The Atmel Evaluation Board Docs describe a way of
Please contact Atmel support for things they do and write. They use their own code, so they will have to support it.
Is there a way to generate an u-boot Version for the Way Atmel describes in any Version or have i to ask Atmel how they patched their Version ?
I have no idea what Atmel descibes (and I don't care), but I guess the CONFIG_SKIP_LOWLEVEL_INIT config option is what you are looking for. Please read the documentation (README).
Best regards,
Wolfgang Denk
participants (2)
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Erdmann, Thomas -
Wolfgang Denk