From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XmdSC-0004Jb-Tk for barebox@lists.infradead.org; Fri, 07 Nov 2014 06:55:30 +0000 Date: Fri, 7 Nov 2014 07:55:06 +0100 From: Sascha Hauer Message-ID: <20141107065506.GU30369@pengutronix.de> References: <1415272993-29736-1-git-send-email-l.stach@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1415272993-29736-1-git-send-email-l.stach@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718 To: Lucas Stach Cc: barebox@lists.infradead.org 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 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