[PATCH] ARM: exynos: fix UART address selection for DEBUG_LL

[Joonyoung Shim]

The exynos5 SoCs using A15+A7 can boot to A15 or A7. If it boots using
A7, it can't detect right UART physical address only the part number of
CP15. It's possible to solve as checking Cluster ID additionally.

Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
---
 arch/arm/include/debug/exynos.S | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/debug/exynos.S b/arch/arm/include/debug/exynos.S
index b17fdb7..60bf3c2 100644
--- a/arch/arm/include/debug/exynos.S
+++ b/arch/arm/include/debug/exynos.S
@@ -24,7 +24,11 @@
 		mrc	p15, 0, \tmp, c0, c0, 0
 		and	\tmp, \tmp, #0xf0
 		teq	\tmp, #0xf0		@@ A15
-		ldreq	\rp, =EXYNOS5_PA_UART
+		beq	100f
+		mrc	p15, 0, \tmp, c0, c0, 5
+		and	\tmp, \tmp, #0xf00
+		teq	\tmp, #0x100		@@ A15 + A7 but boot to A7
+100:		ldreq	\rp, =EXYNOS5_PA_UART
 		movne	\rp, #EXYNOS4_PA_UART	@@ EXYNOS4
 		ldr	\rv, =S3C_VA_UART
 #if CONFIG_DEBUG_S3C_UART != 0
-- 
1.9.1