sh: smp: Hook up a timer IPI stub.

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

2 files changed, 31 insertions, 6 deletions

diff --git a/arch/sh/include/asm/smp.h b/arch/sh/include/asm/smp.h
index 5ebe0d09559..9d22cda67c2 100644
--- a/arch/sh/include/asm/smp.h
+++ b/arch/sh/include/asm/smp.h
@@ -21,19 +21,26 @@ extern int __cpu_number_map[NR_CPUS];
 extern int __cpu_logical_map[NR_CPUS];
 #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
 
-#define SMP_MSG_FUNCTION        0
-#define SMP_MSG_RESCHEDULE      1
-#define SMP_MSG_FUNCTION_SINGLE 2
-#define SMP_MSG_NR              3
+enum {
+        SMP_MSG_FUNCTION,
+        SMP_MSG_RESCHEDULE,
+        SMP_MSG_FUNCTION_SINGLE,
+        SMP_MSG_TIMER,
+
+        SMP_MSG_NR,     /* must be last */
+};
 
 void smp_message_recv(unsigned int msg);
+void smp_timer_broadcast(cpumask_t mask);
+
 void plat_smp_setup(void);
 void plat_prepare_cpus(unsigned int max_cpus);
 int plat_smp_processor_id(void);
 void plat_start_cpu(unsigned int cpu, unsigned long entry_point);
 void plat_send_ipi(unsigned int cpu, unsigned int message);
-extern void arch_send_call_function_single_ipi(int cpu);
-extern void arch_send_call_function_ipi(cpumask_t mask);
+
+void arch_send_call_function_single_ipi(int cpu);
+void arch_send_call_function_ipi(cpumask_t mask);
 
 #else
 
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index ebfdd364544..9cb3734dbd4 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -184,6 +184,21 @@ void arch_send_call_function_single_ipi(int cpu)
         plat_send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
 }
 
+void smp_timer_broadcast(cpumask_t mask)
+{
+        int cpu;
+
+        for_each_cpu_mask(cpu, mask)
+                plat_send_ipi(cpu, SMP_MSG_TIMER);
+}
+
+static void ipi_timer(void)
+{
+        irq_enter();
+        /* XXX ... */
+        irq_exit();
+}
+
 void smp_message_recv(unsigned int msg)
 {
         switch (msg) {
@@ -195,6 +210,9 @@ void smp_message_recv(unsigned int msg)
         case SMP_MSG_FUNCTION_SINGLE:
                 generic_smp_call_function_single_interrupt();
                 break;
+        case SMP_MSG_TIMER:
+                ipi_timer();
+                break;
         default:
                 printk(KERN_WARNING "SMP %d: %s(): unknown IPI %d\n",
                        smp_processor_id(), __func__, msg);