diff --git a/kernel/mikc.c b/kernel/mikc.c
index 01a88b0f..1bda9743 100644
--- a/kernel/mikc.c
+++ b/kernel/mikc.c
@@ -4,7 +4,7 @@
 #include <aal/ikc.h>
 
 static struct aal_ikc_channel_desc mchannel;
-static int master_channel_packet_handler(void *__packet);
+static int master_channel_packet_handler(void *__packet, void *arg);
 
 void ikc_master_init(void)
 {
@@ -12,11 +12,19 @@ void ikc_master_init(void)
 	kprintf("done.\n");
 }
 
-static int master_channel_packet_handler(void *__packet)
+static int master_channel_packet_handler(void *__packet, void *arg)
 {
 	struct aal_ikc_master_packet *packet = __packet;
 
 	/* Do something */
+	kprintf("Packet = %p\n", packet);
+	kprintf("Master packet! : %x\n", packet->msg);
+
+	switch (packet->msg) {
+	case MASTER_PACKET_INIT_ACK:
+		aal_ikc_send(&mchannel, packet, 0);
+		break;
+	}
 
 	return 0;
 }
diff --git a/kernel/setup.c b/kernel/setup.c
index f188608c..0a50aae1 100644
--- a/kernel/setup.c
+++ b/kernel/setup.c
@@ -8,6 +8,7 @@ extern void arch_init(void);
 extern void kmsg_init(void);
 extern void mem_init(void);
 extern void ikc_master_init(void);
+extern void arch_ready(void);
 
 int main(void)
 {
@@ -21,8 +22,9 @@ int main(void)
 
 	ikc_master_init();
 
-	cpu_enable_interrupt();
+	arch_ready();
 
+	cpu_enable_interrupt();
 	while (1) {
 		cpu_halt();
 		kprintf("back from halt.\n");