From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Ungerer Subject: Re: [PATCH 1/2] m68knommu: create config options for CPU classes Date: Thu, 23 Jun 2011 11:35:50 +1000 Message-ID: <4E029876.6040507@snapgear.com> References: <1307083397-9994-1-git-send-email-gerg@snapgear.com> <1307083397-9994-3-git-send-email-gerg@snapgear.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from sncsmrelay2.nai.com ([67.97.80.206]:23669 "EHLO sncsmrelay2.nai.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758537Ab1FWBgN (ORCPT ); Wed, 22 Jun 2011 21:36:13 -0400 In-Reply-To: Sender: linux-m68k-owner@vger.kernel.org List-Id: linux-m68k@vger.kernel.org To: Geert Uytterhoeven Cc: linux-m68k@vger.kernel.org, uclinux-dev@uclinux.org, Greg Ungerer Hi Geert, On 03/06/11 21:15, Geert Uytterhoeven wrote: > On Fri, Jun 3, 2011 at 08:43, wrote: >> From: Greg Ungerer >> >> There are 3 families of CPU core types that we support in the m68knommu >> architecture branch. They are >> >> . traditional 68000 >> . CPU32 (which is a 68020 core derivitive without MMU) > > derivative ... and without bitfield instructions. > >> . ColdFire > >> It will be useful going forward to have a CONFIG_ option defined for >> each type. We already have one for ColdFire (CONFIG_COLDFIRE), so add >> for the other 2 families, CONFIG_M68000 and CONFIG_MCPU32. > > I'm wondering whether it would help to have Kconfig symbols for the > instruction capabilities as well. > Then you have to document these capabilities in the kconfig definition only, > and can use single (e.g.) #ifdef CONFIG_CPU_HAS_BITFIELDS tests everywhere > else, instead of duplicating the logic at every #ifdef. I have just posted a modified version of the bitops.h merge that creates and uses a CONFIG_CPU_HAS_BITFIELDS option. The patch is otherwise the same in terms of changes, just uses this define for the ifdefs. If you/others prefer this we can run with this one. Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Principal Engineer EMAIL: gerg@snapgear.com SnapGear Group, McAfee PHONE: +61 7 3435 2888 8 Gardner Close FAX: +61 7 3217 5323 Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com