linux support for freescale e5500 core?

[Kumar Gala]

On Sep 16, 2010, at 7:03 PM, Benjamin Herrenschmidt wrote:

> On Thu, 2010-09-16 at 16:26 -0600, Chris Friesen wrote:
>>> Sounds like a candidate for upstreaming the patch :-)
>> 
>> As I recall we proposed upstreaming it a while back but there wasn't a
>> lot of interest since it's most useful in supporting poorly-written
>> legacy apps. :) 
> 
> Heh. Well as long as only 970 had that bit ... but with e5500 coming up
> with that too, I suppose it makes -some- sense. Let's at least look at
> the approach you took and we can decide based on how invasive/ugly it
> is :-)

Not sure how the 970 bit worked, but this seems a bit problematic for switching between kernel and application for how we do this on e500mc/e5500.  We'd have to touch the control bit on every exception path which seems ugly to me.

- k