From eb50439b92b6298bf209a982f295ba9c0f7cb30b Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 20 Jan 2012 12:01:12 +0100 Subject: ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP It turns out that the logical CPU mapping is useful even when !CONFIG_SMP for manipulation of devices like interrupt and power controllers when running a UP kernel on a CPU other than 0. This can happen when kexecing a UP image from an SMP kernel. In the future, multi-cluster systems running AMP configurations will require something similar for mapping cluster IDs, so it makes sense to decouple this logic in preparation for this support. Acked-by: Yang Bai Acked-by: Marc Zyngier Reported-by: Joerg Roedel Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/include/asm/smp_plat.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm/include/asm/smp_plat.h') diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h index f24c1b9e211d..558d6c80aca9 100644 --- a/arch/arm/include/asm/smp_plat.h +++ b/arch/arm/include/asm/smp_plat.h @@ -43,4 +43,10 @@ static inline int cache_ops_need_broadcast(void) } #endif +/* + * Logical CPU mapping. + */ +extern int __cpu_logical_map[]; +#define cpu_logical_map(cpu) __cpu_logical_map[cpu] + #endif -- cgit