From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wy0-f179.google.com (mail-wy0-f179.google.com [74.125.82.179]) by ozlabs.org (Postfix) with ESMTP id 3D3B2B6EF1 for ; Wed, 6 Oct 2010 12:55:38 +1100 (EST) Received: by wyb42 with SMTP id 42so6730078wyb.38 for ; Tue, 05 Oct 2010 18:55:35 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <1286327715-sup-584@au1.ibm.com> References: <1285916771-18033-1-git-send-email-imunsie@au1.ibm.com> <1285916771-18033-6-git-send-email-imunsie@au1.ibm.com> <1286327715-sup-584@au1.ibm.com> Date: Tue, 5 Oct 2010 21:55:35 -0400 Message-ID: Subject: Re: [PATCH 05/18] powerpc: Wire up 44x little endian boot for remaining 44x targets From: Josh Boyer To: Ian Munsie Content-Type: text/plain; charset=ISO-8859-1 Cc: paulus , linuxppc-dev , linux-kernel List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Oct 5, 2010 at 9:28 PM, Ian Munsie wrote: > Excerpts from Josh Boyer's message of Fri Oct 01 21:27:37 +1000 2010: >> > From: Ian Munsie >> > >> > I haven't tested booting a little endian kernel on any of these target= s, >> > but they all claim to be 44x so my little endian trampoline should wor= k >> > on all of them, so wire it up on: >> > >> > bamboo >> > katmai >> > kilauea >> > rainer >> > sam440ep >> > sequoia >> > warp >> > yosemite >> > ebony >> >> I see no reason to do this at all. =A0If you haven't tested them and >> there is no demand, there's no reason to wire them up. =A0Some might >> actively want to disallow LE mode anyway, like the Warp or Sam440EP. > > I wasn't aware that the Warp and Sam440EP disallowed LE mode - I'll > definitely unwire them and move the ARCH_SUPPORTS_LITTLE_ENDIAN to just > the sub-arch's that support it. Well, Warp and Sam440EP are production boards for actual companies. The rest are all just eval boards. I don't know if the board maintainers care either way, I was just using them as examples of cases where someone might. > As for the other boards, I would like to wire them up if they are able > to support LE mode - If anyone has one handy I would love to hear if > they are able to begin booting a LE kernel with these patches, or when & > how they fail. I'd avoid anything with an FPU until that gets tested. So no bamboo, sequoia, canyonlands, etc. I noticed that canyonlands isn't even covered. I'm guessing that's because we don't need to create a wrapper for it because U-Boot does direct loading of vmlinux and the DTB itself. Has anyone done any work with getting U-Boot to work in LE mode or at least load LE vmlinux images? The majority of new boards are going to be using U-Boot and it's ability to load the DTB/FDT, so that would be something that needs addressing. josh