[U-Boot] Help Falcon Mode on Wanboard

[Stefano Babic]

Hi Diego,

On 12/08/2016 19:19, Diego Dorta wrote:

>>
>> It was quite a while ago, but the patch sets Falcon mode, and it tries
>> to boot the kernel. Kernel is not in filesystem, but stored at a fixed
>> address on the SD card (0x1000). The error you reported seems when
>> U-Boot is starting - by pressing 'c' or if no kernel is stored.
> 
> Hi Stefano,
> 
> When I use your falcon mode pre-built image everything works fine, but when I try to replace to use the binaries I've compiled,
> the normal mode (pressing C) doesn't work and shows this error: 
> 
> U-Boot 2016.01-rc4-26067-g04df0e7-dirty (Aug 12 2016 - 10:31:08 -0300)
> 
> CPU:   Freescale i.MX6Q rev1.2 at 792 MHz
> Reset cause: POR
> initcall sequence 178290d4 failed at call 178038bd (err=394279101)
> ### ERROR ### Please RESET the board ###
> 
> 
> I use the following commands to copy the binaries:
> 
> $ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 oflag=sync status=none && sync
> 
> $ sudo dd if=u-boot.img of=/dev/sdb bs=1K seek=69 oflag=sync status=none && sync

This does not seem an issue when you write inot the SD card, else SPL is
not started. But SPL works as expected and load correctly u-boot.img,
that crashes.

I do not know if this makes a difference, but I check my logs and I have
seen that I built with gcc 4.9.2 (Yocto-fido). This should not be an
issue, but...

You should take a look at u-boot.map, and check the address where it
happens. 0x00000000178290d4 should be init_sequence_f, you have to see
in which function is 178038bd to make supposition.

For example, in my original u-boot.map (that I have still found on my
PC), I see:

.text.initr_malloc
                0x00000000178038a8       0x16 common/built-in.o
 .text.initr_caches
                0x00000000178038be        0xa common/built-in.o


If binary was identical, it means a failure in initr_malloc. But your
build is surely different and you have to find it.

Best regards,
Stefano

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