1 files changed, 37 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ux500/hotplug.c b/kernel/arch/arm/mach-ux500/hotplug.c
new file mode 100644
index 000000000..2bc00b085
--- /dev/null
+++ b/kernel/arch/arm/mach-ux500/hotplug.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ *	Based on ARM realview platform
+ *
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+#include <asm/smp_plat.h>
+
+#include "setup.h"
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+void __ref ux500_cpu_die(unsigned int cpu)
+{
+	/* directly enter low power state, skipping secure registers */
+	for (;;) {
+		__asm__ __volatile__("dsb\n\t" "wfi\n\t"
+				: : : "memory");
+		if (pen_release == cpu_logical_map(cpu)) {
+			/*
+			 * OK, proper wakeup, we're done
+			 */
+			break;
+		}
+	}
+}