sh: smp: Hook up a timer IPI stub.

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

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
 

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);