add CPU timer initialization (refs #402)

There is no actual initialization in x86 now.
The initialization rely on hardware reset and Linux initialization.

arch/x86/kernel/cpu.c

@@ -1517,3 +1517,21 @@ ihk_mc_user_context_t *lookup_user_context(struct thread *thread)
 
 	return uctx;
 } /* lookup_user_context() */
+
+void init_tick(void)
+{
+	dkprintf("init_tick():\n");
+	return;
+}
+
+void init_delay(void)
+{
+	dkprintf("init_delay():\n");
+	return;
+}
+
+void sync_tick(void)
+{
+	dkprintf("sync_tick():\n");
+	return;
+}

kernel/ap.c

@@ -31,10 +31,12 @@ static volatile int ap_stop = 1;
 
 static void ap_wait(void)
 {
+	init_tick();
 	while (ap_stop) {
 		barrier();
 		cpu_pause();
 	}
+	sync_tick();
 
 	kmalloc_init();
 	sched_init();
@@ -53,7 +55,9 @@ static void ap_wait(void)
 
 void ap_start(void)
 {
+	init_tick();
 	ap_stop = 0;
+	sync_tick();
 }
 
 void ap_init(void)
@@ -63,6 +67,7 @@ void ap_init(void)
 	int bsp_hw_id;
 
 	ihk_mc_init_ap();
+	init_delay();
 	
 	cpu_info = ihk_mc_get_cpu_info();
 	bsp_hw_id = ihk_mc_get_hardware_processor_id();

lib/include/ihk/cpu.h

@@ -104,4 +104,8 @@ extern unsigned int ihk_ikc_irq_apicid;
 
 extern int gettime_local_support;
 
+void init_tick(void);
+void init_delay(void);
+void sync_tick(void);
+
 #endif