embedding dtb file into kernel

I'm having trouble figuring out how to embed a dtb file into my kernel.  
I'm thinking that there should be a standard, architecture independent 
facility for this akin to initramfs, yes?

Could someone please either point me to the standard facility, relevant 
doc, a currently building board that uses the standard facility, or 
outline what needs to be done to do this with a new board?

If it matters, (I can't think why it would), I'm working with powerpc on 
a 3.10 kernel.  But if there are better facilities in other versions I'd 
appreciate hearing about that too.

Thank you in advance.

--rich