path: root/arch/arm/include
diff options
authorNicolas Pitre <nicolas.pitre@linaro.org>2012-11-27 21:54:41 -0500
committerNicolas Pitre <nicolas.pitre@linaro.org>2013-06-20 00:23:49 -0400
commit917c352f7ba7753449aa670b49748068f6629cd1 (patch)
treec94cb7039d9747c26d41e3802681e88fa3bae0c1 /arch/arm/include
parent1c332d4f223066932035578f22877d269443394e (diff)
ARM: SMP: basic IPI triggered completion support
We need a mechanism to let an inbound CPU signal that it is alive before even getting into the kernel environment i.e. from early assembly code. Using an IPI is the simplest way to achieve that. This adds some basic infrastructure to register a struct completion pointer to be "completed" when the dedicated IPI for this task is received. Signed-off-by: Nicolas Pitre <nico@linaro.org>
Diffstat (limited to 'arch/arm/include')
2 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/include/asm/hardirq.h b/arch/arm/include/asm/hardirq.h
index 2740c2a2df6..3d7351c844a 100644
--- a/arch/arm/include/asm/hardirq.h
+++ b/arch/arm/include/asm/hardirq.h
@@ -5,7 +5,7 @@
#include <linux/threads.h>
#include <asm/irq.h>
-#define NR_IPI 6
+#define NR_IPI 7
typedef struct {
unsigned int __softirq_pending;
diff --git a/arch/arm/include/asm/smp.h b/arch/arm/include/asm/smp.h
index d3a22bebe6c..610ccf33f5e 100644
--- a/arch/arm/include/asm/smp.h
+++ b/arch/arm/include/asm/smp.h
@@ -81,6 +81,8 @@ extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
+extern int register_ipi_completion(struct completion *completion, int cpu);
struct smp_operations {