Odd-looking serial console prompt on RPI2

[Ian Lepore]

On Wed, 2017-03-08 at 03:18 +0530, Jayachandran C. wrote:
> On Mon, Mar 6, 2017 at 9:54 PM, Ian Lepore <ian at freebsd.org> wrote:
> > [...]
> 
> I was thinking that IFLS behaved differently on ThunderX and that is
> why my original code worked there. But after going thru the spec
> again,
> it looks like the FIFO in newer pl011 implementations is 32 entry
> deep,
> and that may be real reason why ThunderX did not have any issues.
> 
> JC.

Could you (and anybody else who has a board that uses pl011 uarts)
please test the attached patch?  I tested already on an rpi-b and it
works fine there, but I'd like to hear whether it works on something
that actually has 32-byte fifos.  It should probably be tested on an
rpi2 as well (which I don't have).

-- Ian
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