Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752304AbbKKXuL (ORCPT ); Wed, 11 Nov 2015 18:50:11 -0500 Received: from mail-pa0-f53.google.com ([209.85.220.53]:33614 "EHLO mail-pa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751167AbbKKXuJ (ORCPT ); Wed, 11 Nov 2015 18:50:09 -0500 From: Kevin Hilman To: Eddie Huang Cc: Yingjoe Chen , "devicetree\@vger.kernel.org" , Russell King - ARM Linux , , Arnd Bergmann , Tyler Baker , Stephen Boyd , lkml , Olof Johansson , Rob Herring , , Sascha Hauer , Matthias Brugger , "linux-arm-kernel\@lists.infradead.org" Subject: Re: [PATCH v5 4/5] ARM: dts: mt8135: enable basic SMP bringup for mt8135 References: <1443799181-50409-1-git-send-email-yingjoe.chen@mediatek.com> <1443799181-50409-5-git-send-email-yingjoe.chen@mediatek.com> <1445843717.23888.1.camel@mtksdaap41> <1445859610.26723.4.camel@mtksdaap41> <1447135867.14454.9.camel@mtksdaap41> <7h1tbx1gjp.fsf@deeprootsystems.com> <1447228557.20886.10.camel@mtksdaap41> Date: Wed, 11 Nov 2015 15:50:05 -0800 In-Reply-To: <1447228557.20886.10.camel@mtksdaap41> (Eddie Huang's message of "Wed, 11 Nov 2015 15:55:57 +0800") Message-ID: <7hpozgyu36.fsf@deeprootsystems.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2271 Lines: 66 Hi Eddie, Eddie Huang writes: > On Tue, 2015-11-10 at 17:16 -0800, Kevin Hilman wrote: >> Hi Eddie, >> >> [...] >> >> > I check the log [0], >> >> Thanks for checking into this boot failure. >> >> > it seems first time mt8135-evbp1 boot to kernel >> > shell successfully, then boot again. In the second time, mt8135 stay in >> > fastboot mode, waiting host send boot image, then timeout. >> >> Actually, it never gets to a shell the first time. If you look closely, >> the target reboots as soon as userspace starts. Look for the PYBOOT >> line which says "finished booting, starting userspace" >> >> Later on, pyboot thinks it finds a root shell due to finding '#' >> characters, but clearly it never got to a shell. >> >> > I download zImage and dtb in [1], and kernel run to shell successfully >> > on my platform. >> >> Are you can you try using a ramdisk as well? You can use the pre-built >> one here: >> http://storage.kernelci.org/images/rootfs/buildroot/armel/rootfs.cpio.gz >> > > Yes, I tried this ramdisk, and I can reproduce fail issue. > OK, good. Thanks for looking into it. >> Please check my boot logs to see how I'm generating the boot.img file >> (search for mkbootimg) with a kernel/dtb/ramdisk. It may be possible >> that the kernel image size with a ramdisk is breaking some of the >> assumptions in the fastboot mode. I've seen problems like this on other >> platforms due to hard-coded sizes/addresses in the boot firmware. >> > > MT8135 allocate 10MB for BOOT partition, but the test boot.img is 11MB, > thus cause user space fail. Aha, I was right! ;) > I will prepare new firmware that extend BOOT > partition to 16MB. and put new firmware on Howard's github. I will mail > to you when I am ready.. Great, thanks for working on this. Any chance of making it even bigger? We're working on running some more automated testing from a ramdisk, and those ramdisks will be easily 30-50 Mb with modules included and a rootfs with extra tests. Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/