[U-Boot] printf("%d") breaks u-boot 2015.01+

[Heiko Schocher]

Hello Pavel,

Am 07.04.2015 09:56, schrieb Pavel Machek:
> Hi!
>
>>> In u-boot 2015.04-rc, as soon as execution hits printf("%d"), it
>>> hangs. (Usually, that's after "DRAM: " message).
>>>
>>> Now, I have to admit I'm chainloading u-boot from
>>>
>>> U-Boot 2013.01.01 (Mar 25 2015 - 15:57:21)
>>>
>>> tftp 0x01000040 .../u-boot.bin
>>> Waiting for PHY auto negotiation to complete.. done
>>> ENET Speed is 100 Mbps - FULL duplex connection
>>> Using mii0 device
>>> TFTP from server 10.0.0.6; our IP address is 10.0.0.99
>>> ...
>>>   Bytes transferred = 325004 (4f58c hex)
>>> # go 0x01000040
>>>
>>> ...but that worked well for 2014.10, (and is nearly mandatory in my
>>> config).
>>>
>>> I'm using cross-compiler from eldk-5.6, but eldk-5.4 crosscompiler
>>> produces same behaviour, and both seem to work for 2014.10.
>>>
>>> Any ideas?
>>
>> Do you have caches on?
>> Try to disable "dcache off" before "go ..." ...
>
> I tried, and did not get any change. I also tried to flash 2015.04-rc4
> directly into NOR to be loaded from SPL (not chainloaded), and it
> fails the same way.

Ok.

>> maybe this helps? I just stepped into same problem on an am335x,
>> but had not yet time to look deeper in it ...
>
> I did not try the cleanup_before_linux(), but "dcache off" should have
> same effect, right?

Hmm.. not exactly... cleanup_before_linux() does also disable the mmu.

bye,
Heiko
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