Problems of using APU/FPU under linux

Stephen Neuendorffer stephen.neuendorffer at
Wed Apr 16 04:50:49 EST 2008

> -----Original Message-----
> From: Shanyuan Gao [mailto:sygao.research at]
> Sent: Tuesday, April 15, 2008 11:47 AM
> To: Stephen Neuendorffer; linuxppc-embedded at
> Cc: John Bonesio; Yoshio Kashiwagi
> Subject: Re: Problems of using APU/FPU under linux
> No, actually I am using head_4xx.S and I cannot find FPU_UNAVAILABLE
> in there. Do I need to set it?

Yes, I think this is why you are getting the unknown trap.  It appears
that 405's usually don't have FPU and so the code was never put there.


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