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From: Reinhard Arlt <reinhard.arlt@t-online.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] IRQ in realmode and sleep()
Date: Thu, 01 Jul 2010 10:14:44 +0200	[thread overview]
Message-ID: <4C2C4E74.8060801@t-online.de> (raw)
In-Reply-To: <20100630075949.7B60B14EBF7@gemini.denx.de>

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@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
>

      reply	other threads:[~2010-07-01  8:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-29  8:03 [U-Boot] IRQ in realmode and sleep() Reinhard Arlt
2010-06-29 18:44 ` Scott Wood
2010-06-30  7:02   ` Reinhard Arlt
2010-06-30  7:59     ` Wolfgang Denk
2010-07-01  8:14       ` Reinhard Arlt [this message]

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