christophe leroy writes:
> So it means that you arrive at serial_console_setup.
>
> My problem for now resides before realy starting the kernel, in
> head-armv.S
>
> I'm able to write things on serial by writing bytes at 0x42000160
> (after been sure UART is free by testing 0x42000178) when MMU is OFF.
> But When I try to write things on serial just after having switch MMU
> ON ,in the beginning of .Lalready_done_mmap (So I write at
> 0xFE000160, which is the supposed virtual adresse of UART), nothing
> happens. So I wonder what happens after having put MMU ON.
There is at the bottom of head-armv.S a load of debugging code for exactly
this sort of debugging. You may want to try some of it out. Note however,
that it does require a serial lead with RTS and CTS connected (it's sometimes
useful while using these to be able to stop the kernel...)
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