Re: Custom kernel crashes

[Thomas Petazzoni <thomas.petazzoni@enix.org>]

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Hello,

Manish Lachwani a écrit :

> This may or may not apply to your case. Is this board still the one that 
> has the Marvell Discovery ethernet device? If yes, Marvell Discovery has 
> its SRAM located at 0xfe000000. So, make a check in the ethernet driver 
> or other board specific sources and see if there is any access to this 
> SRAM location.

The DMA buffers and DMA buffer descriptors used for the serial driver 
are all located in the SRAM of the Marvell, which is mapped using a 
wired uncached TLB entry.

Here's the code that wires the entry :

   add_wired_entry(ENTRYLO(NPP_BOARD_INTERNAL_SRAM_BASE),
                   ENTRYLO(NPP_BOARD_INTERNAL_SRAM_END),
                   NPP_BOARD_INTERNAL_SRAM_BASE,
                   PM_256K);

I would like to use ioremap() instead of wired TLB entries, but for the 
moment, I'm focusing on this crash.

Thanks,

Thomas
-- 
PETAZZONI Thomas - thomas.petazzoni@enix.org
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