Wandboard fails to boot after install?

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Wandboard fails to boot after install?

Postby royb » Mon May 08, 2017 3:33 pm

Hi All,

I have installed archlunixarm to an sdcard following these instructions:
https://archlinuxarm.org/platforms/armv ... stallation

When powered on the u-boot environment loads, but the OS/kernel is not started. Instead u-boot tries to boot from the network via tftp. Here is the output from the serial console:
Code: Select all
U-Boot 2016.11 (Nov 25 2016 - 11:21:12 -0700) Arch Linux ARM

CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: Wandboard rev C1
I2C:   ready
DRAM:  2 GiB
No panel detected: default to HDMI
Display: HDMI (1024x768)
In:    serial
Out:   serial
Err:   serial
Net:   FEC [PRIME]
Press SPACE to abort autoboot in 2 seconds
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
MMC: no card present
starting USB...
USB0:   Port not available.
USB1:   USB EHCI 1.00
scanning bus 1 for devices... 1 USB Device(s) found
       scanning usb for storage devices... 0 Storage Device(s) found

USB device 0: unknown device
BOOTP broadcast 1
BOOTP broadcast 2
BOOTP broadcast 3
BOOTP broadcast 4
BOOTP broadcast 5
DHCP client bound to address (3768 ms)
*** Warning: no boot file name; using 'C0A8B222.img'
Using FEC device
TFTP from server; our IP address is
Filename 'C0A8B222.img'.
Load address: 0x12000000
Loading: *^HT

As far as I can tell, this happens because u-boot doesn't find the files it expects in the filesystem on the sdcard.

If I have followed the logic of functions defined in the u-boot environment correctly then it appears that:
    u-boot is looking for files in the file system called "boot.scr.uimg" or "boot.scr" (defined in var "boot_scripts").
    It looks in "/" and "/boot" (defined via "boot_prefixes").

Looking in the filesystem I don't see those filenames, only the following:
Code: Select all
=> ext2ls mmc 0:1 /
<DIR>       4096 .
<DIR>       4096 ..
<DIR>      16384 lost+found
<SYM>          7 bin
<DIR>       4096 boot
<DIR>       4096 dev
<DIR>       4096 etc
<DIR>       4096 home
<SYM>          7 lib
<DIR>       4096 mnt
<DIR>       4096 opt
<DIR>       4096 proc
<DIR>       4096 root
<DIR>       4096 run
<SYM>          7 sbin
<DIR>       4096 srv
<DIR>       4096 sys
<DIR>       4096 tmp
<DIR>       4096 usr
<DIR>       4096 var

=> ext2ls mmc 0:1 /boot
<DIR>       4096 .
<DIR>       4096 ..
         5730624 zImage
         4225428 initramfs-linux.img
<DIR>      28672 dtbs

The stack of functions/vars defined in u-boot env. looks like this:

bootcmd=run findfdt; run distro_bootcmd

for target in ${boot_targets}; do
run bootcmd_${target};
boot_targets=mmc0 mmc1 usb0 pxe dhcp

bootcmd_mmc0=setenv devnum 0; run mmc_boot
bootcmd_mmc1=setenv devnum 1; run mmc_boot

mmc_boot=if mmc dev ${devnum}; then setenv devtype mmc; run scan_dev_for_boot_part; fi

I assume all of the above is loaded at power on as part of u-boot?

The files I downloaded to setup the sdcard look like this:
Code: Select all
-rw-r----- 1 robb 323,014,327 May  1 05:17 ArchLinuxARM-armv7-latest.tar.gz.1
-rw-r----- 1 robb 323,014,327 May  1 05:17 ArchLinuxARM-armv7-latest.tar.gz
-rw-r----- 1 robb      48,128 May  3 22:24 SPL
-rw-r----- 1 robb     331,760 May  3 22:24 u-boot.img

What could the problem be?

I have the sdcard installed in the slot directly on the cpu module, nearest the heatsink. If I try the other slot on the larger "io port card", I get no u-boot at all.

Any suggestions?

Thanks in advance!
Posts: 2
Joined: Mon May 08, 2017 2:11 pm

Re: Wandboard fails to boot after install?

Postby kmihelich » Mon May 08, 2017 6:38 pm

The instructions were missing a step to download the needed boot.scr, which has been fixed now.
Arch Linux ARM exists and continues to grow through community support, please donate today!
Posts: 1124
Joined: Tue Jul 20, 2010 6:55 am
Location: aka leming #archlinux-arm

Re: Wandboard fails to boot after install?

Postby royb » Mon May 08, 2017 10:27 pm

I wondered why it didn't work :?

I took the extra step as now documented and it worked perfectly. Great!

(With the OS up I was also able to carry out the u-boot update as documented on the same page.)

Thanks again!
Posts: 2
Joined: Mon May 08, 2017 2:11 pm

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