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

[Marek Vasut <marex@denx.de>]

Dear Stefano Babic,

> On 30/03/2012 17:28, Marek Vasut wrote:
> >> However, Albert has sent a report
> >> 
> >>  http://www.mail-archive.com/u-boot at 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 192.168.2.14; our IP address is 192.168.2.97
> 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.

You get this from FEC? Will have to recheck, this is weird, will recheck once I 
get back to my m28.

> 
> > 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,
> yes.

Agreed.

> 
> > (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@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@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@boundarydevices.com>
>     Acked-by: Marek Vasut <marex@denx.de>

They weren't already? Hm.

> 
> Best regards,
> Stefano Babic

Best regards,
Marek Vasut