> 
> > Does paging_init invalidates page 0xFE000000, so I cannot write 
> > anymore directly into UART, or is that paginig_init that never 
> > returns ?
> 
> No.  Please use the printascii, it's there for this sort of debugging!
> Try putting it into 'printk' since it will hopefully allow the kernel
> to tell you what's going wrong.
> 

Ok, I've added debugging code to printk, and then I can tell:
It hangs in setup_pagetables in paging_init, which is called with 
start_mem=0xC0075DA4 and end_mem=0xCEFD0240 (what 
strange values)

I'd a look at setup arch and I got params=0xC0000100, 
params....page_size=0xe59FF018 and nr_pages=0xe59FF018

I think something is wrong there. Should be params struct be 
initialised somewhere before ? or params be null ?

Christophe
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