[U-Boot-Users] Flash vs DataFlash vs NAND Flash

Matt Gessner mgessner at Avidyne.com
Thu Mar 22 21:54:16 CET 2007

Hi, all,

On my AT91RM9200 board, I have an Atmel DataFlash for booting off my
SPI, and I have a NAND flash.

I do not, however, have any other kind of flash.

My 128K DataFlash address is 0xc0000000, and my 128MB of RAM is at

When I do 

	cp.b 20200000 c0000000 2c60

	Copy to DataFlash... done

it works just fine.

When I do

	cp.b c0000000 20200000 2c60

the system crashes with a data abort, but before the crash, it reports

	Copy to Flash...

Well, I'm quite confused how to set the various flash flags to make all
this work.

If I try to set CFG_NO_FLASH, the system won't compile.

But there is no "conventional" flash on the board... just the nand
(8-bit port) and dataflash (spi).  

Would someone kindly point me to a reference that explains how I can set
up u-boot 1.2.0 to make this work?  Or just come straight out and tell

Thanks in advance,


Matt Gessner

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