In message 000401c4c30a$578db310$4501a8c0@bgcw301 you wrote:
I understand that uboot works in 2 stages, one before RAM isinitialized and the other after RAM is initialized.
You understand that these are just two different states of operation within the same code?
But my requirement is, I would like to load the First stage ofuboot into Flash, then get the second stage of the boot loader thro' a fast Ethernet(This means that I require a Ethernet driver to run from
This is no possible with U-Boot. There are no separate images, but just one program which is running first in flash, and then - agfter relocation - continues to run from RAM.
Flash). In addition I would also like to start a Flash File system in first stage itself. Here's a summary
Uboot -- I stage [Running from Flash] CPU setup. Ethernet driver, support for TFTP. Flash driver. Flash file system. Uboot - IIstage [Running from RAM]
That does not work. First, you cannot have an ethenret driver before initializing the ram (where would you buffer the network packets?). Second, with most flash types you cannot access the flash (like erase, program, or even read status information) while you are executing code from the same device. You MUST be running such code from some other memory.
Would like to know whether the above split up of Uboot is feasible?
No, this is not possible.
What makes you think you need such a configuration? Why can't you just use U-Boot as is?
Best regards,
Wolfgang Denk