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-rw-r--r--arch/arm/mach-msm/platsmp.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/arch/arm/mach-msm/platsmp.c b/arch/arm/mach-msm/platsmp.c
index 2034098cf01..1a1af9e5625 100644
--- a/arch/arm/mach-msm/platsmp.c
+++ b/arch/arm/mach-msm/platsmp.c
@@ -18,6 +18,7 @@
#include <asm/hardware/gic.h>
#include <asm/cacheflush.h>
+#include <asm/cputype.h>
#include <asm/mach-types.h>
#include <mach/msm_iomap.h>
@@ -40,6 +41,12 @@ volatile int pen_release = -1;
static DEFINE_SPINLOCK(boot_lock);
+static inline int get_core_count(void)
+{
+ /* 1 + the PART[1:0] field of MIDR */
+ return ((read_cpuid_id() >> 4) & 3) + 1;
+}
+
void __cpuinit platform_secondary_init(unsigned int cpu)
{
/* Configure edge-triggered PPIs */
@@ -147,9 +154,9 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
*/
void __init smp_init_cpus(void)
{
- unsigned int i;
+ unsigned int i, ncores = get_core_count();
- for (i = 0; i < NR_CPUS; i++)
+ for (i = 0; i < ncores; i++)
set_cpu_possible(i, true);
set_smp_cross_call(gic_raise_softirq);
@@ -157,12 +164,4 @@ void __init smp_init_cpus(void)
void __init platform_smp_prepare_cpus(unsigned int max_cpus)
{
- int i;
-
- /*
- * Initialise the present map, which describes the set of CPUs
- * actually populated at the present time.
- */
- for (i = 0; i < max_cpus; i++)
- set_cpu_present(i, true);
}