[U-Boot-Users] u-boot as second monitor

[Ulf Samuelsson <ulf@atmel.com>]

Wolfgang Denk skrev:
> In message <4550A211.9070706@dei.uminho.pt> you wrote:
>> I have a TQM823L board that comes with the Mon8xx monitor. I have read 
>> about how to install uboot over Mon8xx, but I would like to know if it 
>> is possible to generate u-boot  for a different flash address and call 
>> it after the Mon8xx boot. If so what should I change in the uboot code?
> 
> No, this is not possible. There is no reason  to  keep  MON8xx  after
> installing U-Boot anyway. You won't ever need or want it again.
> 

It is possible, This is how you boot the AT91RM9200 from dataflash.

First the bootROM is executed and this loads "Dataflashboot.bin" into
internal SRAM and jumps to the beginning.
Dataflashboot.bin loads U-Boot into SDRAM and jumps into U-boot.
And no, you cannot replace Dataflashboot.bin with U-boot
(unless you manage to shrink it to 12 kByte)

The at91rm9200dk needs a little tweaking for this to work.
Cannot link it to 0x00000000.

/Ulf


> Best regards,
> 
> Wolfgang Denk
> 

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