[U-Boot] [PATCH 05/13] davinci_emac: fix for running with dcache enabled

[Ilya Yanok]

Hi Andy,

On 12.11.2011 02:11, Andy Fleming wrote:
>> DaVinci EMAC is present on TI AM35xx SoCs (ARMv7) which run with D-Cache
>> enabled by default. So we have to take care and flush/invalidate the
>> cache before/after the DMA operations.
>>
>> Please note that the receive buffer alignment to 32 byte boundary comes
>> from the old driver version I don't know if it is really needed or
>> alignment to cache line size is enough.
>>
>> Signed-off-by: Ilya Yanok <yanok at emcraft.com>
>
> I don't understand. Didn't you just submit a patch to disable dcache
> on all boards with EMAC?

Yes, on all arm926ejs boards. Look, arm926ejs has no implementation for
{flush,invalidate}_dcache_range and I really have no time now to
implement them. So I've just added no-op cache operations for
CONFIG_SYS_DCACHE_OFF case to fix the compilation of DaVinci board.

But it turned out that the builds are still broken because some DaVinci
boards using EMAC do not disable D-Cache.

Regards, Ilya.