[meta-ti] BBB + uboot 2014.07 - not booting

[Robert Nelson]

On Mon, Sep 1, 2014 at 6:28 PM, Peter A. Bigot <pab at pabigot.com> wrote:
> On 09/01/2014 04:53 PM, Diego Sueiro wrote:
>
> Peter,
>
> On Mon, Sep 1, 2014 at 6:10 PM, Peter A. Bigot <pab at pabigot.com> wrote:
>>
>> I am seeing the same behavior with an SD card with u-boot from current
>> meta-ti master (MLO-beaglebone-2014.07-r1+gitrAUTOINC+8bd803d2c5)
>>
>> I partition the cards and create the boot/root partitions with:
>>
>> sudo dd if=/dev/zero of=${MMC} bs=1024 count=1024
>> ( echo ,9,0x0C,* ; echo ,,,- ) \
>>   | sudo sfdisk -D -H 255 -S 63 ${MMC}
>>
>> ${SUDO} mkfs.vfat -F 16 -n boot ${MMC}1
>> ${SUDO} mkfs -t ${FSTYPE} -L rootfs ${MMC}2
>>
>> ${SUDO} cp -p MLO u-boot.img ${MPROOT}/boot
>>
>> This process works with poky master and yocto-bsp on beaglebone.
>>
>> I recall from long ago that some TI systems were picky about the
>> partitioning of the boot media.
>
>
> This is not true for recent Sitara SoCs:
> http://permalink.gmane.org/gmane.comp.handhelds.openembedded/64088
>
>
>>
>> Would somebody with an SD card image that boots the current meta-ti master
>> provide the output of fdisk -lu from it, or a pointer to instructions for
>> doing the formatting?  For reference, what doesn't work is:
>>
>> llc[325]$ sudo fdisk -lu /dev/sdh
>>
>> Disk /dev/sdh: 7892 MB, 7892631552 bytes
>> 255 heads, 63 sectors/track, 959 cylinders, total 15415296 sectors
>> Units = sectors of 1 * 512 = 512 bytes
>> Sector size (logical/physical): 512 bytes / 512 bytes
>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>> Disk identifier: 0x00000000
>>
>>
>>    Device Boot      Start         End      Blocks   Id  System
>> /dev/sdh1   *          63      144584       72261    c  W95 FAT32 (LBA)
>> /dev/sdh2          144585    15406334     7630875   83  Linux
>
>
> I'm using the following partition layout (both working on eMMC and sdcard
> with u-boot_2014.07.bb):
>
> # fdisk -lu /dev/mmcblk0
>
> Disk /dev/mmcblk0: 1920 MB, 1920991232 bytes, 3751936 sectors
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk label type: dos
> Disk identifier: 0x00000000
>
>         Device Boot      Start         End      Blocks   Id  System
> /dev/mmcblk0p1   *          63       80324       40131    c  W95 FAT32 (LBA)
>
>
> Thanks.  That does appear to be an eMMC partition, which probably shouldn't
> matter, but I replicated the configuration on a 2GB class 4 uSD card, and an
> 8GB class 6, and it doesn't work on either one.
>
> llc[77]$ sudo fdisk -lu /dev/sdh
>
> Disk /dev/sdh: 3965 MB, 3965190144 bytes
> 255 heads, 63 sectors/track, 482 cylinders, total 7744512 sectors
>
> Units = sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x00000000
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdh1   *          63       80324       40131    c  W95 FAT32 (LBA)
> /dev/sdh2           80325     7743329     3831502+  83  Linux
>
> Anybody got a uSD partition layout that works?  I'm suspecting an issue with
> the heads/sectors/cylinders configuration.
>
> (FWIW: I'm also using u-boot-staging-ti, as that's the default for
> beaglebone on the master branch.)

You could bypass the whole fat partition (On omap4+ bootrom
generations (including the am335x)):

dd if=MLO of=/dev/sdX count=1 seek=1 conv=notrunc bs=128k
dd if=u-boot.img of=/dev/sdX count=2 seek=1 conv=notrunc bs=384k

Just make sure to leave a 1mb hole when you create a partition for
everything else.

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/