[PATCHv3] ARM:boot:device tree: Allow the device tree binary to be appended to zImage

[Nicolas Pitre]

On Fri, 29 Apr 2011, Tony Lindgren wrote:

> If the compressed image is smaller than BSS, then we end up
> having DT data in the BSS area. In this case the compressed
> image is about 2.3 MB for LZMA.
> 
> The uncompress code does not know about the kernel BSS,
> and does not necessarily relocate anything depending on the
> compressed image load address.
> 
> So in which code do we want to relocate the DT data?
> 
> We could do it based on estimated BSS size in uncompress code,
> or based on the real BSS size in __mmap_switched before BSS
> gets reset.

Estimations for that kind of thing is always bound to create problems 
some day.

The DT data should probably be moved out of the way from 
arch/arm/kernel/head.S before the .bss is cleared, and even before 
enabling the MMU, like in __vet_atags.


Nicolas