v3.10 - big endian core support

Will Deacon will.deacon at arm.com
Mon Jul 8 13:03:53 EDT 2013


On Mon, Jul 08, 2013 at 12:02:02PM +0100, Will Deacon wrote:
> On Mon, Jul 08, 2013 at 10:51:59AM +0100, jgq516 at gmail.com wrote:
> > The printascii can output before "b __enable_mmu", after move it to
> > __mmap_switched, nothing can be printed. But if disable LPAE, printascii
> > works again in __mmap_switched.
> 
> Ok, so the page tables are broken. The code is there to swap the two words,
> but perhaps something ends up being off-by-4 or the like. I'll try and take
> a look.

Right, I managed to have a quick play with a 3.10 kernel and the good news
is that the page tables are fine. The bad part is that using
CONFIG_ARM_ATAG_DTB_COMPAT to get my command-line from ATAGs into the FDT
results in a NULL command line, so I don't see any output. If I hardcode the
command line in the kernel image, things work fine.

What kernel are you using, and how are you passing your command line?

Will



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