[PATCH] exynos: Support big endian mode in secondary_startup

[Mark Brown <broonie@kernel.org>]

From: Victor Kamensky <victor.kamensky@linaro.org>

Exynos processors generally operate in little endian mode so their
bootloader and ROM will almost always operate in little endian mode.
This means that if a big endian kernel is run it must switch the CPU
into big endian mode after gaining control.

The generic secondary_startup that is called from exynos specific
secondary startup code will do the switch, but we need it to do earlier
because exynos specific secondary_startup code which runs first also
works with data that is big endian when the kernel is compiled for big
endian.

[Rewrote commit message. -- broonie]

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
---
 arch/arm/mach-exynos/headsmp.S | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-exynos/headsmp.S b/arch/arm/mach-exynos/headsmp.S
index b54f9701e421..ac8364efb985 100644
--- a/arch/arm/mach-exynos/headsmp.S
+++ b/arch/arm/mach-exynos/headsmp.S
@@ -18,6 +18,11 @@
  * ready for them to initialise.
  */
 ENTRY(exynos4_secondary_startup)
+	/*
+	 * ROM code operates in little endian mode, when we get control we
+	 * need to switch it to big endian mode.
+	 */
+ARM_BE8(setend	be)
 	mrc	p15, 0, r0, c0, c0, 5
 	and	r0, r0, #15
 	adr	r4, 1f
-- 
2.0.1