[U-Boot] newbie questions regarding some config options.

Chris ece4afe at yahoo.com
Fri Aug 22 05:49:27 CEST 2014


Wolfgang Denk <wd <at> denx.de> writes:

> 
> Dear PHIL.EDWORTHY <at> renesas.com,
> 
> In message <OF460D0558.A844A780-ONC12578AE.0047905C-802578AE.00482EFA <at> 
eu.necel.com> you wrote:
> >
> > 
> > U-boot is typically stored in flash and one of the first things it
> > does when executed is relocate to ram. CONFIG_SYS_TEXT_BASE is the
> > relocation address. Typically, u-boot global data, heap and then
> 
> This is completely wrong.  The relocation address is determined
> dynamically, depending on RAM size and a number of coinfigured
> options.
> 
> CONFIG_SYS_TEXT_BASE is the start address of the text segment when
> execution starts - on ROM booting systems this is an address in ROM.
> 
> > I am sure more experienced u-boot developers will correct me if I am 
wrong :)
> 
> Indeed this was necessary.
> 
> Best regards,
> 
> Wolfgang Denk
> 

Hello Wolfgang,

is it safe to say that this is the base address of the flash memory, the 
CONFIG_SYS_TEXT_BASE? Of course if I boot from flash..
Say if my flash is in 0x10000000 for NCS0 of at91rm9200 as an example,
CONFIG_SYS_TEXT_BASE = 0x10000000?

Thanks

Chris





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