In message [ref] you wrote:

i am going to make my custom SBC8260 standalone , so i
need to replace the ppcboot of the board with a
bootable linux image. I want this linux to mount the

No, this makes no sense. leave the PPCBoot as is, and use it to  boot
Linux.

flash, and then i put my own final program on the
flash , and as a service, linux will run the program
on any reset.(now,it would be standalone)

Yes, booted by PPCBoot from flash.

so i cannot hold the ppcboot (u-boot) on the flash, i
need the changes in my linux image , or using a linux
driver.

You will always need a boot loader to initialize the  hardware.  This
is what PPCBoot is doing for you. Only then you can start Linux.

(I know board needs bootloader anyway , but i don't
know what it is. is it ppcboot? or ELDK makes a
bootable linux?)

Yes, PPCBoot is the boot loader. Do NOT replace it, just use it.

Any other point of view is really wellcome.

Did you read the DULG? See http://www.denx.de/twiki/bin/view/DULG/Manual

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Lack of skill dictates economy of style.                - Joey Ramone

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