sh: CPU hotplug support.

This adds preliminary support for CPU hotplug for SH SMP systems.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 14 insertions, 2 deletions

diff --git a/arch/sh/include/asm/smp-ops.h b/arch/sh/include/asm/smp-ops.h
index 0581b2a4c8c..c590f76856f 100644
--- a/arch/sh/include/asm/smp-ops.h
+++ b/arch/sh/include/asm/smp-ops.h
@@ -7,20 +7,27 @@ struct plat_smp_ops {
         void (*prepare_cpus)(unsigned int max_cpus);
         void (*start_cpu)(unsigned int cpu, unsigned long entry_point);
         void (*send_ipi)(unsigned int cpu, unsigned int message);
+        int (*cpu_disable)(unsigned int cpu);
+        void (*cpu_die)(unsigned int cpu);
+        void (*play_dead)(void);
 };
 
+extern struct plat_smp_ops *mp_ops;
 extern struct plat_smp_ops shx3_smp_ops;
 
 #ifdef CONFIG_SMP
 
 static inline void plat_smp_setup(void)
 {
-        extern struct plat_smp_ops *mp_ops;     /* private */
-
         BUG_ON(!mp_ops);
         mp_ops->smp_setup();
 }
 
+static inline void play_dead(void)
+{
+        mp_ops->play_dead();
+}
+
 extern void register_smp_ops(struct plat_smp_ops *ops);
 
 #else
@@ -34,6 +41,11 @@ static inline void register_smp_ops(struct plat_smp_ops *ops)
 {
 }
 
+static inline void play_dead(void)
+{
+        BUG();
+}
+
 #endif /* CONFIG_SMP */
 
 #endif /* __ASM_SH_SMP_OPS_H */