[U-Boot] [PATCH] ARM1136: add cache flush and invalidate operations

Stefano Babic sbabic at denx.de
Fri Mar 30 17:58:51 CEST 2012

On 30/03/2012 17:28, Marek Vasut wrote:

>> However, Albert has sent a report
>>  http://www.mail-archive.com/u-boot@lists.denx.de/msg80566.html
>> a none of these boards was broken. But I see now that other boards are
>> affected (the mx28evk does not compile due to missing CONFIG_APBH_DMA).
> Fabio, can you fix please? This is trivial.
>> Albert, are these patches part of your pull-request to Wolfgang ?
> I believe the pullRQ isn't cooked yet. The fix for this issue right now would be 
> to merge a patch that implements blank dcache-management functions for arm1136 
> -- like is in AG's patch. So I'm all for merging AG's patch into AA's tree.

I am testing Anatolij's patch on mx35pdk.

TFTP from server; our IP address is
Filename 'mx35pdk/uImage'.
Load address: 0x80800000
Loading: Misaligned cache operation [8fe726e8, 8fe72728]

However, data is correctly loaded. I will check mmc on the "flea" board.

> It's a good thing this stirred a wave of response including patches. We now know 
> very well which boards are maintained ;-)
> Also, once any such breaking patch lands into mainline, we'll know in 
> _less_than_24_hours_ that something got broken. (this is handled by DENX CI 
> machine).

Well, this is a good thing - my worries are about that patches for imx
were already merged, and

> Finally, we can't really run physical (HW) tests indeed, but did we ever run 
> physical tests with each and every patch?

Not every patch, but a patchset that can have influence on several SOCs,

> (and to conclude this -- these patches 
> were tested on M28 and MX6Q-board)

mmmh...I suppose the following patches must be merged, too (I had merged
into u-boot-next, really):

Author: Eric Nelson <eric.nelson at boundarydevices.com>
Date:   Sun Mar 4 11:47:37 2012 +0000

    i.MX6: define CACHELINE_SIZE

and also even if not mandatory:
commit 1b2150b0770d8d019a41993d8692e4a29bf70a9e
Author: Eric Nelson <eric.nelson at boundarydevices.com>
Date:   Sun Mar 4 11:47:38 2012 +0000

    i.MX6: implement enable_caches()

    disabled by default until drivers are fixed

    Signed-off-by: Eric Nelson <eric.nelson at boundarydevices.com>
    Acked-by: Marek Vasut <marex at denx.de>

Best regards,
Stefano Babic

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
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