Forums

AT91RM9200 bootloaders (to boot into u-boot)

Started by Darrell Harmon July 23, 2004
I have a board based on the AT91RM9200, and want to boot from SPI
dataflash.  The loader will proceed to boot u-boot (Which is too big
for the ROM bootloader to handle).  I have read the atmel appnote on
that, but boot program will need to be changed.  My SDRAM is
configured differently than the DK.  The program with the appnote
includes source, but it is missing quite a bit to be able to be
compiled with the GNU tools.  I also am unsure of the copyright
implications of modifying it.  Does anyone know if there is a good
replacement for this program or a good place to start?

Darrell Harmon
Just in case anyone does a search and finds this I have mostly written
a bootloader which should be easier to modify to match a boards
configuration.  It is not intended to replace u-boot, but will boot
u-boot.  I will put it on my website at http://dlharmon.com when it it
complete. The license will be the GPL.

Darrell Harmon

mail@dlharmon.com (Darrell Harmon) wrote in message news:<5f698957.0407231155.13e98eb6@posting.google.com>...
> I have a board based on the AT91RM9200, and want to boot from SPI > dataflash. The loader will proceed to boot u-boot (Which is too big > for the ROM bootloader to handle). I have read the atmel appnote on > that, but boot program will need to be changed. My SDRAM is > configured differently than the DK. The program with the appnote > includes source, but it is missing quite a bit to be able to be > compiled with the GNU tools. I also am unsure of the copyright > implications of modifying it. Does anyone know if there is a good > replacement for this program or a good place to start? > > Darrell Harmon
Why you don't use the atmel one ? it is complete of sources and you can 
find it at the atmel website on the application notes section.

Bye,
Stefano.

Darrell Harmon wrote:
> Just in case anyone does a search and finds this I have mostly written > a bootloader which should be easier to modify to match a boards > configuration. It is not intended to replace u-boot, but will boot > u-boot. I will put it on my website at http://dlharmon.com when it it > complete. The license will be the GPL. > > Darrell Harmon > > mail@dlharmon.com (Darrell Harmon) wrote in message news:<5f698957.0407231155.13e98eb6@posting.google.com>... > >>I have a board based on the AT91RM9200, and want to boot from SPI >>dataflash. The loader will proceed to boot u-boot (Which is too big >>for the ROM bootloader to handle). I have read the atmel appnote on >>that, but boot program will need to be changed. My SDRAM is >>configured differently than the DK. The program with the appnote >>includes source, but it is missing quite a bit to be able to be >>compiled with the GNU tools. I also am unsure of the copyright >>implications of modifying it. Does anyone know if there is a good >>replacement for this program or a good place to start? >> >>Darrell Harmon