New driver crashes with "unable to handle paging request"

Wed Apr 23 09:09:40 PDT 2014

I'm just trying to port the USB driver "musb" (for the AM335x platform) from
linux kernel to barebox.
But whenever I want to read any address in the range 0x47401400-0x474017ff, the
barebox crashes with "unable to handle paging request".
I have already tried to invoke a "map_io_sections(0x0, 0x47400000, 0x2000)", but
it didn't help.

Fortunately I can test it on the barebox command line with the command
 md -w 0x4740146c-0x4740146d

In the linux kernel they are calling the "ioremap()" function for this memory
range, but I didn't find an equivalent function in the barebox source.

Do you have any idea, how to avoid the "paging request" failure here?

Best regards,
 Rolf