From: Sascha Hauer <s.hauer@pengutronix.de>
To: Lucas Stach <l.stach@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718
Date: Fri, 7 Nov 2014 07:55:06 +0100 [thread overview]
Message-ID: <20141107065506.GU30369@pengutronix.de> (raw)
In-Reply-To: <1415272993-29736-1-git-send-email-l.stach@pengutronix.de>
On Thu, Nov 06, 2014 at 12:23:12PM +0100, Lucas Stach wrote:
> ARM Cortex A8 errata 709718:
> "Load and store operations to shared device memory
> regions may not complete in program order"
>
> We implement the recommended workaround in the bootloader
> as it must be applied before enabling the MMU for the
> first time.
>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Applied both, thanks
Sascha
> ---
> arch/arm/include/asm/errata.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm/include/asm/errata.h b/arch/arm/include/asm/errata.h
> index e2ffd87360c0..9525823e4ca8 100644
> --- a/arch/arm/include/asm/errata.h
> +++ b/arch/arm/include/asm/errata.h
> @@ -12,6 +12,18 @@
> * GNU General Public License for more details.
> */
>
> +static inline void enable_arm_errata_709718_war(void)
> +{
> + __asm__ __volatile__ (
> + "mrc p15, 0, r0, c10, c2, 0\n"
> + "bic r0, #3 << 16\n"
> + "mcr p15, 0, r0, c10, c2, 0\n"
> + "mrc p15, 0, r0, c1, c0, 0\n"
> + "orr r0, r0, #1 << 28\n"
> + "mcr p15, 0, r0, c1, c0, 0\n"
> + );
> +}
> +
> static inline void enable_arm_errata_716044_war(void)
> {
> __asm__ __volatile__ (
> --
> 2.1.1
>
>
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
prev parent reply other threads:[~2014-11-07 6:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-06 11:23 Lucas Stach
2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
2014-11-11 13:51 ` Andreas Pretzsch
2014-11-11 14:01 ` Lucas Stach
2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
2014-11-06 12:44 ` Lucas Stach
2014-11-06 12:46 ` Eric Bénard
2014-11-07 6:55 ` Sascha Hauer [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141107065506.GU30369@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
--cc=l.stach@pengutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox