From: Albert ARIBAUD <albert.u.boot@aribaud.net>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] FIX for dcache_disable() for ARM926ej-s
Date: Mon, 24 Oct 2011 23:49:12 +0200 [thread overview]
Message-ID: <4EA5DD58.3090505@aribaud.net> (raw)
In-Reply-To: <1319179460-5625-1-git-send-email-b.van.den.berg.nl@gmail.com>
Hi Bas,
Le 21/10/2011 08:44, Bas van den Berg a ?crit :
> the cache also needs to be invalidated, not just flushed, Since re-enabling it,
> can cause inconsistent data without invalidation. See example below.
>
> in c-file:
> static int num = 1;
>
> void test() {
> num = 1;
> dcache_enable();
> printf("Cache on, num=%d\n", num);
> num = 2;
> dcache_disable();
> printf("Cache off, num=%d\n", num);
> num = 1;
> dcache_enable();
> printf("Cache on, num=%d\n", num); // -> prints 2 instead of 1!!
> dcache_disable();
> printf("Cache off, num=%d\n", num);
> }
This part of the patch is what will stay in the GIT tree as the commit
message. Here it is too verbose. Remove useless example.
Amicalement,
--
Albert.
prev parent reply other threads:[~2011-10-24 21:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 6:44 [U-Boot] [PATCH] FIX for dcache_disable() for ARM926ej-s Bas van den Berg
2011-10-21 12:08 ` Sergei Shtylyov
2011-10-24 21:49 ` Albert ARIBAUD [this message]
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