From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e33.co.us.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id F3BA9DDDE6 for ; Thu, 5 Jun 2008 12:31:38 +1000 (EST) Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e33.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id m552VZeM024539 for ; Wed, 4 Jun 2008 22:31:35 -0400 Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m552VYow079234 for ; Wed, 4 Jun 2008 20:31:35 -0600 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m552VYUj032646 for ; Wed, 4 Jun 2008 20:31:34 -0600 Date: Wed, 4 Jun 2008 21:31:23 -0500 From: Josh Boyer To: - Reyneke Subject: Re: FP and signal 4 Message-ID: <20080604213123.4e53f813@zod.rchland.ibm.com> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, 4 Jun 2008 14:43:48 +0000 - Reyneke wrote: > > Hi all, > > Has anyone come across any floating point issues in the new powerpc kernel branch with regards to 44x? I'm seeing programs (i.e. init/busybox) generating signal 4 (illegal instruction) exceptions. If I compile a 2.6.25 kernel with the CONFIG_MATH_EMULATION option set, then everything works OK. I've not seen that. > Using a 440EPx (has a onchip FPU) with the ELDK 4.0 ppc_4xxFP toolchain for all apps/kernel/fs. 440EPx should get the FPU enabled at runtime. We use a virtual PVR to do the APU/FPU init. What does your cpu node look like in your DTS file for your board? josh