From: Ralf Baechle <ralf@linux-mips.org>
To: moreau francis <francis_moreau2000@yahoo.fr>
Cc: linux-mips@linux-mips.org
Subject: Re: dcache issue...
Date: Thu, 20 Jan 2005 14:49:22 +0100 [thread overview]
Message-ID: <20050120134922.GA3684@linux-mips.org> (raw)
In-Reply-To: <20050120111543.38076.qmail@web25105.mail.ukl.yahoo.com>
On Thu, Jan 20, 2005 at 12:15:43PM +0100, moreau francis wrote:
> I almost done to run linux in kseg2. But I noticed a
> bug
> related to the cache that I can't explain. Maybe
> you'll
> have an idea...
>
> I configured kseg2 to map kernel space, and to be
> "uncached". So when accessing kernel space, virtual
> addr > 0xc0000000, I don't use both icache and dcache.
> When kernel maps a user page in user space, it uses
> data cache. In this scenario, some kernel data are
> corrupted. But when I map kernel space and activate
> caches to access it, it seems to work.
Live is tough, use caches ;-)
Mixing different cache modes for results in unspecified behaviour, such
as data corruption.
Ralf
next prev parent reply other threads:[~2005-01-20 13:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-20 11:15 dcache issue moreau francis
2005-01-20 13:49 ` Ralf Baechle [this message]
2005-01-20 14:00 ` moreau francis
2005-01-20 14:18 ` Maciej W. Rozycki
2005-01-20 14:34 ` Ralf Baechle
2005-01-20 15:11 ` moreau francis
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