From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] Change the internal SRAM memory type MT_MEMORY_NONCACHED
Date: Thu, 13 Jun 2013 14:43:43 +0100 [thread overview]
Message-ID: <20130613134342.GE18614@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <51B9C6FE.7000302@atmel.com>
On Thu, Jun 13, 2013 at 03:19:58PM +0200, Nicolas Ferre wrote:
> On 08/06/2013 04:17, Wenyou Yang :
>> Because MT_DEVICE is not executable in armv7, we change
>> the internal SRAM memory type to MT_MEMORY_NONCACHED.
>> As it seems that caching this internal SRAM memory is not necessary,
>> we chose the this memory type.
>>
>> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>
> But Russell, can we have your advice on this as you made us re-think
> about that during previous patch discussion?
I think this is fine - using MT_MEMORY_NONCACHED gets you a memory-like
mapping instead of a strongly ordered or device mapping, but without
caching issues, which is what you want here.
prev parent reply other threads:[~2013-06-13 13:43 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-20 1:05 [PATCH] Change internal SRAM memory type to "MT_MEMORY_SO" Wenyou Yang
2013-05-20 1:06 ` [PATCH] ARM: at91: Fix: " Wenyou Yang
2013-05-21 9:06 ` Nicolas Ferre
2013-05-22 0:14 ` Russell King - ARM Linux
2013-05-24 7:11 ` Yang, Wenyou
2013-05-24 11:20 ` Russell King - ARM Linux
2013-05-24 14:03 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-24 16:40 ` Russell King - ARM Linux
2013-05-24 16:52 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-24 16:59 ` Russell King - ARM Linux
2013-05-24 17:11 ` Jean-Christophe PLAGNIOL-VILLARD
2013-05-21 9:06 ` [PATCH] " Nicolas Ferre
2013-06-08 2:17 ` [PATCH] Change the internal SRAM memory type MT_MEMORY_NONCACHED Wenyou Yang
2013-06-13 13:19 ` Nicolas Ferre
2013-06-13 13:43 ` Russell King - ARM Linux [this message]
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