Re: [U-Boot-Users] Re: how can I boot u-boot from 0x40000 in flash instead

In message cd490d13050715112919118c13@mail.gmail.com you wrote:

Thanks. I am a newbie on u-boot.

1. I changed the u-boot.lds in my board directory. in the line

.=0x00000000 I changed it to .=0x00040000

This will hardly be sufficient. Remember that U-Boot expects to be started from the reset vector, which it will also assume when relocating, etc. Just changing the address is not sufficient - instead you will have to create a "gap" where you rpoprietary boot code fits in.

2. Could you please tell me where are the codes which COPY the code

from flash to the cache and sdram?

I hope you will not continue to ask where to find each and every function. You are supposed to have the knowledge and tools to find your own way through the code. Tools like grep or ctags may help...

See function relocate_code() in cpu/*/start.S

Best regards,

Wolfgang Denk