Dear Daniel Gorsulowski,
Hello Reinhard,
...
Check that your AT91Bootstrap loads u-boot to a sane address not at the very end of DRAM, and that CONFIG_SYS_TEXT_BASE is exactly the address where AT91Bootstrap loads u-boot. (I changed AT91Bootstrap to load u-boot to the very begin of DRAM for our boards.)
I neither change the AT91Bootstrap nor the CONFIG_SYS_TEXT_BASE address, so the problem must be located elsewhere.
Not necessaryly. You have not changed them, but who says they were correct before? I am not sure, but before relocation it might have not mattered if they were different. Just really check to make sure.
Today I found out by GPIO debugging, that U-Boot seems to boot but prints its startup messages to wrong USART with proper baudrate. I'll try to find out, why there is no output on DBGU.
I have to correct myself. My board_init() and checkboard() fanctions are executed. But the board crashes, before misc_init_r() functions executes. (I guess, it crashes somwhere in board_init_f()) I'll try to find out more infos. But without an appropriate opportunity to debug, it will be verry difficult.
I can only advice a step by step approach: Take the at91sam9260ek port and only change the bits that are different for 9263 and your board. I don't have any 9263 based board here, so I cannot point to a proven, working port for that SoC.
Best Regards, Reinhard