[U-Boot-Users] hang up after start_here
Hello all,
I'm designing a custom board build around a 405GPr processor. I'm in my third prototype phase, and I've problem with one board which hang during Linux booting. 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.
Kernel version is 2.4.18 from Montavista.
Thanks for help,
Laurent
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
participants (2)
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Laurent Mohin -
Wolfgang Denk