From mboxrd@z Thu Jan 1 00:00:00 1970 From: Santosh Shilimkar Subject: Re: [PATCH] ARM: OMAP5: Switch to THUMB mode if needed on secondary CPU Date: Tue, 22 Apr 2014 14:39:37 -0400 Message-ID: <5356B769.1020306@ti.com> References: <1398191506-3741-1-git-send-email-joelf@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1398191506-3741-1-git-send-email-joelf@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Joel Fernandes , Linux OMAP List , Linux ARM Kernel List , Linux Kernel Mailing List Cc: Russell King , Nishanth Menon , Tony Lindgren List-Id: linux-omap@vger.kernel.org On Tuesday 22 April 2014 02:31 PM, Joel Fernandes wrote: > On my DRA7 system, when the kernel is built in THUMB mode, the secondary CPU > (Cortex A15) fails to come up causing SMP boot on second CPU to timeout. This > seems to be because the CPU is in ARM mode once the ROM hands over control to > the kernel. Switch to THUMB mode if required once the kernel is control of > secondary CPU. On OMAP4 on the other hand, it appears to be in THUMB mode on > entry so this is not required and SMP boot works as is. > > Cc: Santosh Shilimkar > Cc: Russell King > Cc: Nishanth Menon > Cc: Tony Lindgren > Signed-off-by: Joel Fernandes > --- > arch/arm/mach-omap2/omap-headsmp.S | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > Looks fine to me .. Acked-by: Santosh Shilimkar