Re: 440EP FPU patch | linuxppc-dev

(off-list ancestor, not in this archive)

I'll try to see if I can build a kernel to use on a pegasos box to test=20=

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=20
wrote:
 > > > > > On Fri, 2005-03-18 at 10:06 -0600, Kumar Gala wrote:
 > > > > > > Can you build your patch for the lopec_defconfig and fix=20=

the errors
associated with enabling altivec.
 > > > > > >
Looks like you need to include asm/offset.h & asm/page.h=20=

in vector.S,
however there is another build error after that.
 > > > > >
Thanks! That also found a linking bug, fixed in this patch..=20=

Please
double check the call in 'AltiVecUnavalible' in head.S, and=20=

the re-load
 > > > > > of 'ctr' at the end of load_up_altivec, as I do not have an=20=

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=3Dc03816b0, pc=3Dc000d664)
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.=A0 We got to the point where it was reliably crashing on =
my
LoPEC (7400), but no time to try and fix it.=A0 The problem should=20=

show up
 > > on any classic PPC box..
 >
If nobody has time to work on this, then I intend=A0 to put Wade's=20=

440EP
 > support in as is (actually, he's planning on resubmitting with some
 > additional changes).=A0 When somebody has time, they can redo the=20=

patch
against that.
That's a good point to bring up.=A0 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?

--=20
Tom Rini
 http://gate.crashing.org/~trini/
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