440EP FPU patch

[Kumar Gala]

I'll try to see if I can build a kernel to use on a pegasos box to test 
out the avec side tomorrow.

- kumar

On Mar 31, 2005, at 2:15 PM, Tom Rini wrote:

> On Thu, Mar 31, 2005 at 01:10:44PM -0700, Matt wrote:
>  > On Thu, Mar 31, 2005 at 09:34:21AM -0700, Tom Rini wrote:
>  > > On Thu, Mar 31, 2005 at 09:26:18AM -0700, Wade Farnsworth wrote:
>  > > > On Fri, 2005-03-18 at 12:30, Tom Rini wrote:
>  > > > > On Fri, Mar 18, 2005 at 01:43:11PM -0500, Jason McMullan 
> wrote:
>  > > > > > On Fri, 2005-03-18 at 10:06 -0600, Kumar Gala wrote:
>  > > > > > > Can you build your patch for the lopec_defconfig and fix 
> the errors
> > > > > > > associated with enabling altivec.
>  > > > > > >
> > > > > > > Looks like you need to include asm/offset.h & asm/page.h 
> in vector.S,
> > > > > > > however there is another build error after that.
>  > > > > >
> > > > > > Thanks! That also found a linking bug, fixed in this patch.. 
> Please
> > > > > > double check the call in 'AltiVecUnavalible' in head.S, and 
> the re-load
>  > > > > > of 'ctr' at the end of load_up_altivec, as I do not have an 
> AltiVec
>  > > > > > machine here.
>  > > > >
> > > > > No dice:
>  > > > > VFS: Mounted root (nfs filesystem) readonly.
>  > > > > Freeing unused kernel memory: 100k init 4k prep
>  > > > > floating point used in kernel (task=c03816b0, pc=c000d664)
> > > > > Doing some objdump'ing, that's the start of load_up_altivec.
> > > >
> > > > Hi Jason and Tom,
>  > > >
> > > > Has there been any more progress on this patch?
>  > >
> > > Sadly no.  We got to the point where it was reliably crashing on my
> > > LoPEC (7400), but no time to try and fix it.  The problem should 
> show up
>  > > on any classic PPC box..
>  >
> > If nobody has time to work on this, then I intend  to put Wade's 
> 440EP
>  > support in as is (actually, he's planning on resubmitting with some
>  > additional changes).  When somebody has time, they can redo the 
> patch
> > against that.
>
> That's a good point to bring up.  Jason, do you want to post your
>  current version to the list and we can try and see if we can get it
>  workign right?
>
> -- 
> Tom Rini
>  http://gate.crashing.org/~trini/
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