In message OFE8EA1A87.9A7B8A06-ONC1256D86.0028950A-C1256D86.002D5CE3@se.wavetek.com you wrote:
I've debugged and found that the board hangs in start_here function and doesn't reach the early_init function.
Because the problem appears on only one of my boards out of 16, I suspect a hardware problem, and because it occurs just after mmu initialisation and caches enabling, I suspect more especially sdram accesses.
I want to know if anybody has encountered a similar problem and if the diagnostic was the same.
This is a standard problem, which can show up in many forms. My bet is that your SDRAM initialization sequence is incomplete / broken. Remember that it is NOT sufficient to set up the mmeory controller, you must also intialize the SDRAM chips themself.
Best regards,
Wolfgang Denk