[U-Boot-Users] u-boot as second stage boot loader

[Z.N.]

Hi!

I've got an at 91 rm 9200 based board with a 2MB _SERIAL_ flash
connected to it. Since the flash is serial, it is not mapped to memory,
and the board cannot boot from it. However, the first 16kbyte of this
serial flash gets copied into the 16kbyte SRAM of the processor. Now I
have a small boot loader loaded into the SRAM which initializes the
SDRAM, can load pages from the serial flash, talk on the serial
line,etc.

The next step would be to load u-boot as a second stage boot loader,
however how can someone do this?

The memory configuration is like this:
0x0-0x4000 processor SRAM
0x4000-0x8000 processor ROM
0x20000000-0x21000000 SDRAM

As it can be seen, the SRAM is too small for the 80-90kbyte u-boot
image... What is the solution? Maybe i could take the u-boot image
apart, and copy the code before relocation into the sram and the code
after relocation into SDRAM and then make a "mov r5,#0;mov pc,r5"?

Any help is appreciated!
Regards,
Zo