Hi All,
I am porting the u-boot for a customized board based on MPC8315 processor. It has DDR2 SDRAM of 128 MB & 8 MB of flash. I found that the code hangs during the relocation of the code, exactly in the following line (@ relocation function in cpu/mpc83xx/start.S) lwz r5, GOT(__bss_start)
Since the board has only 8MB of flash, I have modified the the TEXT_BASE to 0xFFF80000(as against 0xFE000000). I am able to access the DDR2 SDRAM(whole 128MB) , I tested it by writing & reading the patterns 0xaaaaaaaa & 0x555555555, So I assumed the DDR2 SDRAM timing are proper.
I would like to know the following 1. What does the 'GOT(__bss_start) do? 2. Do I have to change the linker script since I have changed the TEXT_BASE? 3. Is there any other cause for hanging?
Thank you in advance for helping Regards, Suresh