[PATCH v2 0/5] ARM: omap[34]: Thumb-2 compatibility fixes

[Santosh Shilimkar]

Dave,
> -----Original Message-----
> From: Dave Martin [mailto:dave.martin at linaro.org]
> Sent: Thursday, February 03, 2011 11:33 PM
> To: linux-arm-kernel at lists.infradead.org
> Cc: Dave Martin; Tony Lindgren; Santosh Shilimkar; Jean Pihet;
> linux-omap at vger.kernel.org; Nicolas Pitre
> Subject: [PATCH v2 0/5] ARM: omap[34]: Thumb-2 compatibility fixes
>
> This set of patches, along with some other patches under
> discussion on alkml, should enable omap3 and omap4 kernels to be
> built with CONFIG_THUMB2_KERNEL.
>
> This patch set builds on recent cleanup done by the omap
> maintainers.
>
> It is also more aggressive than my last post: all affected
> low-level code is now built in Thumb-2.  At least some of this
> code definitely works, but whether the Secure firmware can talk
> to Thumb-2 code properly is unproven:
> in particular, I could use some help/advice from the omap
> community for validating that the low-level power management
> interactions actually work with this patch set.
>
> I've done simple "does it boot?" testing by building a single
> kernel with CONFIG_SMP_ON_UP and CONFIG_THUMB2_KERNEL enabled
> which works on Beagle xM A2 and Panda A1.

I have boot tested this series on OMAP3430 and OMAP4430. Also
tested the RETENTION and OFF mode in suspend on OMAP3.
I couldn't test the DVFS because it isn't in mainline yet
but the changes doesn't looks to break anything.

So if you like, you can add
Tested-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar at ti.com>

>
> The patches can be found, along with a buildable working tree,
> in the following repo:
>
> git://git.linaro.org/people/dmart/linux-2.6-arm.git
>
>  * arm/omap-thumb2: has the patches proposed here
>  * arm/omap-thumb2+merged: additionally has some patches cherry-
>         picked from other trees which are needed in order for the
>         patches on arm/omap-thumb2 to work usefully.
>  * dirty/arm/omap-thumb2+merged: buildable test tree, which adds
>         2 local patches to work around a toolchain bug.
>
> A working kernel config for this tree is here:
> http://people.linaro.org/~dmart/arm_omap-thumb2+v2_config :
>
>   CONFIG_SMP_ON_UP=y
>   CONFIG_THUMB2_KERNEL=y
>   CONFIG_SERIAL_OMAP=n (to avoid garbage on xM; for Panda use
> console=ttyS2)
>
> (The config is derived from the linaro omap config and so turns on
> loads of modules -- don't feel you have to build them all...)
>
>
> Cherry-picked patches originated from Russell's devel tree
> and Tony Lindgren's omap-testing tree:
>
> http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-
> arm.git devel
>
> git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-
> 2.6.git omap-testing
>
>
> Dave Martin (5):
>   ARM: omap4: Correct definition of do_wfi() for
> CONFIG_THUMB2_KERNEL
>   ARM: omap4: Convert END() to ENDPROC() for correct linkage with
>     CONFIG_THUMB2_KERNEL
>   ARM: omap3: Remove hand-encoded SMC instructions
>   ARM: omap3: Thumb-2 compatibility for sram34xx.S
>   ARM: omap3: Thumb-2 compatibility for sleep34xx.S
>
>  arch/arm/mach-omap2/include/mach/omap4-common.h |    5 ++
>  arch/arm/mach-omap2/omap-headsmp.S              |    2 +-
>  arch/arm/mach-omap2/omap44xx-smc.S              |    8 ++--
>  arch/arm/mach-omap2/sleep34xx.S                 |   56
> ++++++++++++++++-------
>  arch/arm/mach-omap2/sram34xx.S                  |   28 ++++++++---
>  5 files changed, 69 insertions(+), 30 deletions(-)