Le 24/01/2011 12:39, Daniel Gorsulowski a écrit :
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.
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.
Make sure nothing executes under board_init_f() that tries to write to BSS (uninitialized) variables: BSS does not actually exist until after relocation, and writing to the would-be BSS area will cause corruption of the U-boot code. Not sure this is what happens with you but better safe than sorry.
Best regards Daniel
Amicalement,