Re: [ECOS] What's the definition of VROM memory region used for?

[Mark Salter <msalter at redhat dot com>]

>>>>> Cristiano Ligieri Pereira writes:

>> The hardware. In order to remap all of SDRAM to low memory, pretty much
>> every other piece of hw on the board would have to get remapped elsewhere.
>> There was a body of code already existing which relied on the physical
>> addresses. Not all of that software (very little actually) was in our
>> control and remapping all of SDRAM to low memory would have broken that
>> code. Because of scheduling issues outside of Red Hat, the current
>> approach was the one that won out.
>> 
>> --Mark

> I'm gonna bug you a little bit more...

> Which piece of code was that? (The one you hadn't control over it...) I
> understood the reasons why you couldn't remmap all SDRAM to the low
> memory, but I'm trying to figure out how you found out about this piece of
> code? Is it documented somewhere? 

I'm not sure exactly. Some of it was the Cyclone diag code. Also there
was code used internally by the folks who sponsored the RedBoot port.
We presented several approaches to deal with the issue. Remapping the
first 4K of RAM and flash was the approach eventually chosen.

--Mark