From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id C33F4E009BD; Wed, 15 Apr 2015 05:06:24 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] Received: from mail.chez-thomas.org (mail.mlbassoc.com [65.100.170.105]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id E0A7DE00954 for ; Wed, 15 Apr 2015 05:06:18 -0700 (PDT) Received: by mail.chez-thomas.org (Postfix, from userid 1998) id 8300EF811E4; Wed, 15 Apr 2015 06:06:17 -0600 (MDT) Received: from [192.168.1.114] (zeus [192.168.1.114]) by mail.chez-thomas.org (Postfix) with ESMTP id D86C9F811E4; Wed, 15 Apr 2015 06:06:16 -0600 (MDT) Message-ID: <552E5453.5070609@mlbassoc.com> Date: Wed, 15 Apr 2015 06:06:43 -0600 From: Gary Thomas User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: meta-freescale@yoctoproject.org References: <552D2B25.9010000@mlbassoc.com> <552D2C66.4040706@mlbassoc.com> <552D2E3B.4000206@mlbassoc.com> In-Reply-To: Subject: Re: Boot on eMMC X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Apr 2015 12:06:24 -0000 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit On 2015-04-15 05:55, Shanx wrote: > I'he successfly booted from the eMMC. To do that, I've boot from the sdcard, and I have written u-boot on mmcbl3boot0 (mmcblk3 is the eMMC) using : > > echo 0 > /sys/block/mmcblk3boot0/force_ro > > dd if=uboot.imx of=/dev/mmcblk3boot0 bs=512 seek=2 skip=2 > > (the first line ables to write on mmcblk3boot0) > > I've tried to write the system on the eMMC, using : > > dd if=rootfs.sdcard of=/dev/mmcblk3 > > After that, I can see the rootfs in mmcblk3p2 and the kernel and dtb files in mmcblk3p1. > > When booting, I access to u-boot, but it can't boot because it doesn't find the kernel. But setting the bootargs with root=/dev/mmcblk3p2, and booting using a downloaded kernel > (stored in RAM) works. What are the commands being used to boot in U-Boot? What are the errors? Have you tried running these commands by hand? The most likely problem is that U-Boot is trying to find your kernel on the wrong MMC device. > > Any idea how I can use the system written on the eMMC to boot ? > > 2015-04-14 17:11 GMT+02:00 Gary Thomas >: > > On 2015-04-14 09:05, Otavio Salvador wrote: > > On Tue, Apr 14, 2015 at 12:04 PM, Gary Thomas > wrote: > > On 2015-04-14 09:00, Otavio Salvador wrote: > > > On Tue, Apr 14, 2015 at 11:58 AM, Gary Thomas > wrote: > > > On 2015-04-14 08:28, Otavio Salvador wrote: > > > > On Tue, Apr 14, 2015 at 11:12 AM, Shanx > wrote: > > > > Hello, > I've tried a lot of things, but I can't boot on eMMC. I've flashed it > from > u-boot, or from the system (booted from the sdcard). For exemple, I've > tried > : dd if=rootfs.sdcard of=/dev/mmcblk3 > I've also tried to flash only u-boot.imx (with dd and seek=2) > > When booting on eMMC (with the boot switch setup given on the Linux > User > Guide), nothing append. Any idea why ? > > > > > eMMC has some details which differ from the uSD normal usage. Mainly > regarding the use of Boot Partitions. So you must to write it to the > boot partition otherwise it won't work. > > > I'm not sure this is correct. I have an i.MX6Q board which has > eMMC on SD4 and SD on SD3 and I can boot from either, using the > same command to install U-Boot > dd if=/tmp/disk/${UBOOT_NAME} of=${DISK} seek=2 bs=512 conv=notrunc > > Maybe it's a difference in the eMMC device (mine is Sandisk SDIN5 > (or7)C2-32G-L) > > > > It depends if Boot Partition is enabled or not. > > > Is that an i.MX6 setting? > > > No; it is eMMC 4.41 (or later) one if IIRC. There are some fields > exposed in sysfs and also a mmc-utils package at meta-oe. > > > Interesting, I'll look at this but my boards have boot partitions: > > mmc0: new high speed DDR MMC card at address 0001 > mmcblk0: mmc0:0001 SEM32G 29.1 GiB > mmcblk0boot0: mmc0:0001 SEM32G partition 1 4.00 MiB > mmcblk0boot1: mmc0:0001 SEM32G partition 2 4.00 MiB > usb 1-1: new high-speed USB device number 2 using ci_hdrc > mmcblk0rpmb: mmc0:0001 SEM32G partition 3 4.00 MiB > mmcblk0: p1 p2 > mmcblk0boot1: unknown partition table > mmcblk0boot0: unknown partition table > > As I said, I install U-Boot directly to block 2 of the device, > not to any of the "boot" partitions. > > -- > ------------------------------__------------------------------ > Gary Thomas | Consulting for the > MLB Associates | Embedded world > ------------------------------__------------------------------ > -- > _________________________________________________ > meta-freescale mailing list > meta-freescale@yoctoproject.__org > https://lists.yoctoproject.__org/listinfo/meta-freescale > > > > -- Please keep your replies on the mailing list(s) so that all may benefit. Private support is available under contract from various agents, including MLB Associates. Private email to me without a contract will be ignored. ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------