From: Kevin Hilman <khilman@kernel.org>
To: Tony Lindgren <tony@atomide.com>
Cc: linux-omap@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Dave Martin <dave.martin@arm.com>,
linux-arm-kernel@lists.infradead.org, tyler.baker@linaro.org
Subject: Re: [RFC] Fix omap3 booting with thumb2 compiled kernel
Date: Wed, 27 May 2015 15:19:10 -0700 [thread overview]
Message-ID: <7h7frtmzoh.fsf@deeprootsystems.com> (raw)
In-Reply-To: <20150527215545.GA30984@atomide.com> (Tony Lindgren's message of "Wed, 27 May 2015 14:55:46 -0700")
[ fix email for Dave Martin, +Tyler ]
Tony Lindgren <tony@atomide.com> writes:
> The power management related assembly needs to interact with
> ARM mode bootrom code, so we need to keep most of the related
> assembly in ARM mode.
>
> Currently we are entering into and ARM mode assembly function
> from thumb2 mode, so we need to make sure we switch to ARM
> mode. And we need to do that again after the cache flush.
>
> ---
>
> Kevin told me about this earlier today..
And for full boot log/panics, see the kernelci.org thumb2 kernel boots
that fail: http://kernelci.org/boot/?THUMB2_KERNEL&fail
> Anybody got better ideas for a fix here?
FWIW, a quick test of this patch makes my omap3-beagle-xm pass a simple
boot test, but it fails with off idle.
Kevin
WARNING: multiple messages have this Message-ID (diff)
From: khilman@kernel.org (Kevin Hilman)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC] Fix omap3 booting with thumb2 compiled kernel
Date: Wed, 27 May 2015 15:19:10 -0700 [thread overview]
Message-ID: <7h7frtmzoh.fsf@deeprootsystems.com> (raw)
In-Reply-To: <20150527215545.GA30984@atomide.com> (Tony Lindgren's message of "Wed, 27 May 2015 14:55:46 -0700")
[ fix email for Dave Martin, +Tyler ]
Tony Lindgren <tony@atomide.com> writes:
> The power management related assembly needs to interact with
> ARM mode bootrom code, so we need to keep most of the related
> assembly in ARM mode.
>
> Currently we are entering into and ARM mode assembly function
> from thumb2 mode, so we need to make sure we switch to ARM
> mode. And we need to do that again after the cache flush.
>
> ---
>
> Kevin told me about this earlier today..
And for full boot log/panics, see the kernelci.org thumb2 kernel boots
that fail: http://kernelci.org/boot/?THUMB2_KERNEL&fail
> Anybody got better ideas for a fix here?
FWIW, a quick test of this patch makes my omap3-beagle-xm pass a simple
boot test, but it fails with off idle.
Kevin
next prev parent reply other threads:[~2015-05-27 22:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-27 21:55 [RFC] Fix omap3 booting with thumb2 compiled kernel Tony Lindgren
2015-05-27 21:55 ` Tony Lindgren
2015-05-27 22:19 ` Kevin Hilman [this message]
2015-05-27 22:19 ` Kevin Hilman
2015-05-27 22:55 ` Tony Lindgren
2015-05-27 22:55 ` Tony Lindgren
2015-05-27 23:19 ` Kevin Hilman
2015-05-27 23:19 ` Kevin Hilman
2015-05-28 11:43 ` Grazvydas Ignotas
2015-05-28 11:43 ` Grazvydas Ignotas
2015-05-28 14:21 ` Tony Lindgren
2015-05-28 14:21 ` Tony Lindgren
2015-05-28 16:17 ` Dave Martin
2015-05-28 16:17 ` Dave Martin
2015-05-28 16:36 ` Tony Lindgren
2015-05-28 16:36 ` Tony Lindgren
2015-05-28 17:31 ` Dave Martin
2015-05-28 17:31 ` Dave Martin
2015-05-28 18:55 ` Arnd Bergmann
2015-05-28 18:55 ` Arnd Bergmann
2015-05-28 20:41 ` Tony Lindgren
2015-05-28 20:41 ` Tony Lindgren
2015-05-29 11:06 ` Dave P Martin
2015-05-29 11:06 ` Dave P Martin
2015-05-29 16:28 ` Tony Lindgren
2015-05-29 16:28 ` Tony Lindgren
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