Problems of using APU/FPU under linux

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



> -----Original Message-----
> From: Shanyuan Gao [mailto:sygao.research at gmail.com]
> Sent: Tuesday, April 15, 2008 11:47 AM
> To: Stephen Neuendorffer; linuxppc-embedded at ozlabs.org
> 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.

Steve




More information about the Linuxppc-embedded mailing list