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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-12-11 11:01:53 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-12-11 11:01:53 +0100 |
| commit | 0fa5d3996dbda1ee9653c43d39b7ef159fb57ee7 (patch) | |
| tree | 70f0adc3b86bb1511be6607c959506f6365fc2a9 /arch/arm/include/asm/smp_plat.h | |
| parent | Merge branches 'cache-l2x0', 'fixes', 'hdrs', 'misc', 'mmci', 'vic' and 'warn... (diff) | |
| parent | ARM: 7587/1: implement optimized percpu variable access (diff) | |
| download | linux-0fa5d3996dbda1ee9653c43d39b7ef159fb57ee7.tar.xz linux-0fa5d3996dbda1ee9653c43d39b7ef159fb57ee7.zip | |
Merge branch 'devel-stable' into for-linus
Diffstat (limited to 'arch/arm/include/asm/smp_plat.h')
| -rw-r--r-- | arch/arm/include/asm/smp_plat.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_plat.h b/arch/arm/include/asm/smp_plat.h index 558d6c80aca9..aaa61b6f50ff 100644 --- a/arch/arm/include/asm/smp_plat.h +++ b/arch/arm/include/asm/smp_plat.h @@ -5,6 +5,9 @@ #ifndef __ASMARM_SMP_PLAT_H #define __ASMARM_SMP_PLAT_H +#include <linux/cpumask.h> +#include <linux/err.h> + #include <asm/cputype.h> /* @@ -48,5 +51,19 @@ static inline int cache_ops_need_broadcast(void) */ extern int __cpu_logical_map[]; #define cpu_logical_map(cpu) __cpu_logical_map[cpu] +/* + * Retrieve logical cpu index corresponding to a given MPIDR[23:0] + * - mpidr: MPIDR[23:0] to be used for the look-up + * + * Returns the cpu logical index or -EINVAL on look-up error + */ +static inline int get_logical_index(u32 mpidr) +{ + int cpu; + for (cpu = 0; cpu < nr_cpu_ids; cpu++) + if (cpu_logical_map(cpu) == mpidr) + return cpu; + return -EINVAL; +} #endif |