summaryrefslogtreecommitdiff
path: root/arch/arm/mach-shmobile/hotplug.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-shmobile/hotplug.c')
-rw-r--r--arch/arm/mach-shmobile/hotplug.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/hotplug.c b/arch/arm/mach-shmobile/hotplug.c
new file mode 100644
index 000000000000..238a0d97d2d5
--- /dev/null
+++ b/arch/arm/mach-shmobile/hotplug.c
@@ -0,0 +1,41 @@
+/*
+ * SMP support for R-Mobile / SH-Mobile
+ *
+ * Copyright (C) 2010 Magnus Damm
+ *
+ * Based on realview, Copyright (C) 2002 ARM Ltd, All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+int platform_cpu_kill(unsigned int cpu)
+{
+ return 1;
+}
+
+void platform_cpu_die(unsigned int cpu)
+{
+ while (1) {
+ /*
+ * here's the WFI
+ */
+ asm(".word 0xe320f003\n"
+ :
+ :
+ : "memory", "cc");
+ }
+}
+
+int platform_cpu_disable(unsigned int cpu)
+{
+ /*
+ * we don't allow CPU 0 to be shutdown (it is still too special
+ * e.g. clock tick interrupts)
+ */
+ return cpu == 0 ? -EPERM : 0;
+}