[okl4-developer] MMU fault on write to hardware_back_memsection

[Lukas HANEL]

Hi

I found my way through Linux device and driver registration and am 
finally able to start the NAND driver. After some adaptions I am now 
facing a real problem. After the control register of the NAND 
Controller, the driver will also ioremap three pages directly from the 
NAND memory. On the first write to these pages, the iguana server 
notices an mmu fault.
<iguana_server> ARM mmu fault fs=8

What can I do?

I also specified this NAND memory in the machines.py. Is this 
interfering with hardware_back_memsection? But at a first sight, the 
call does not yield an error message.

Note also that I had to implement dma_alloc_coherent and just copied the 
file from arch/l4/sys-i386/dma.c. Might this be a source for the problem?

thanks,
Lukas Hänel