[U-Boot] IRQ in realmode and sleep()
Reinhard Arlt
reinhard.arlt at t-online.de
Thu Jul 1 10:14:44 CEST 2010
Hello,
i is the other way round.
as there is no translation on (real mode) when executing the irq
routine, the data caching always is on.
Best regards,
Reinhard Arlt
Wolfgang Denk wrote:
> Dear Reinhard Arlt,
>
> In message<4C2AEC16.9080906 at t-online.de> you wrote:
>>
>> The question is: Is it O.K., that the irq routines run in real mode,
>> with all your I/O locations are cacheable, for example.
>
> I expect to see problems when you enable data cache for I/O; there are
> many drivers in U-Boot which are not prepared for such conditions.
>
> Best regards,
>
> Wolfgang Denk
>
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