[Open-graphics] OGA1 mad dash: What's left

[Timothy Normand Miller]

On 1/2/08, Lourens Veen <lourens at rainbowdesert.net> wrote:

> That would just be a change to the routing logic right? It would have to
> be able to select using 0, 1 or 2 LSBs, and then chop off the
> corresponding amount (2, 1 or 0) of bits at the top to make a 25-bit
> address to pass into the arbiters. Or am I missing something?

You have the basic idea.

Since all accesses have to be broken down into 64-bit chunks anyhow,
all it really requires is that we shift off fewer bits from the right
(as you said).  The routing logic as it is is a primitive sort of
scheduler.  We need to make it more sophisticated so that it can
resolve, essentially, more agents trying to access the same memory
controller.


-- 
Timothy Normand Miller
http://www.cse.ohio-state.edu/~millerti
Open Graphics Project