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@xxxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
 |