Wolfgang,
thanks for your reply. How can you bet that my initialization sequence is incomplete? I remember you that it works on 15 boards out of 16.
Laurent
Wolfgang Denk wd@denx.de Sent by: wd@denx.de 18/08/03 10:39
To: "Laurent Mohin" laurent.mohin@acterna.com cc: linuxppc-embedded@lists.linuxppc.org, u-boot-users@lists.sourceforge.net Subject: Re: [U-Boot-Users] hang up after start_here
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