diff --git a/arch/ia64/hp/sim/hpsim_console.c b/arch/ia64/hp/sim/hpsim_console.c
index 0475a54524043f69ffb04433c228f6f853a904dc..01663bc42b1a25e8c18d72f93f6ec318ac5d10fb 100644
--- a/arch/ia64/hp/sim/hpsim_console.c
+++ b/arch/ia64/hp/sim/hpsim_console.c
@@ -59,7 +59,6 @@ simcons_write (struct console *cons, const char *buf, unsigned count)
 
 static struct tty_driver *simcons_console_device (struct console *c, int *index)
 {
-	extern struct tty_driver *hp_simserial_driver;
 	*index = c->index;
 	return hp_simserial_driver;
 }
diff --git a/arch/ia64/hp/sim/simeth.c b/arch/ia64/hp/sim/simeth.c
index f26077a773d59d5c92f28c78bec20e23ca0e3264..4017696ada637d0633998daf750a668336b5189c 100644
--- a/arch/ia64/hp/sim/simeth.c
+++ b/arch/ia64/hp/sim/simeth.c
@@ -22,6 +22,9 @@
 #include <linux/bitops.h>
 #include <asm/system.h>
 #include <asm/irq.h>
+#include <asm/hpsim.h>
+
+#include "hpsim_ssc.h"
 
 #define SIMETH_RECV_MAX	10
 
@@ -35,12 +38,6 @@
 #define SIMETH_FRAME_SIZE	ETH_FRAME_LEN
 
 
-#define SSC_NETDEV_PROBE		100
-#define SSC_NETDEV_SEND			101
-#define SSC_NETDEV_RECV			102
-#define SSC_NETDEV_ATTACH		103
-#define SSC_NETDEV_DETACH		104
-
 #define NETWORK_INTR			8
 
 struct simeth_local {
@@ -124,9 +121,6 @@ simeth_probe (void)
 	return r;
 }
 
-extern long ia64_ssc (long, long, long, long, int);
-extern void ia64_ssc_connect_irq (long intr, long irq);
-
 static inline int
 netdev_probe(char *name, unsigned char *ether)
 {
diff --git a/arch/ia64/hp/sim/simscsi.c b/arch/ia64/hp/sim/simscsi.c
index e62694f8ef75d8b6b46605e6c9924d4ba7bcf898..4552a1cf5b338f5a7aa2f03175a07a6cd5f35959 100644
--- a/arch/ia64/hp/sim/simscsi.c
+++ b/arch/ia64/hp/sim/simscsi.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/timer.h>
 #include <asm/irq.h>
+#include "hpsim_ssc.h"
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_cmnd.h>
@@ -59,8 +60,6 @@ struct disk_stat {
 	unsigned count;
 };
 
-extern long ia64_ssc (long arg0, long arg1, long arg2, long arg3, int nr);
-
 static int desc[16] = {
 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
 };
diff --git a/include/asm-ia64/hpsim.h b/include/asm-ia64/hpsim.h
index d6be3fdc39fa65c7c84e7ced10c18ae0e2512a1d..892ab198a9da86d2a30d3332a3f29df2aaf73a5a 100644
--- a/include/asm-ia64/hpsim.h
+++ b/include/asm-ia64/hpsim.h
@@ -7,4 +7,10 @@ static inline int simcons_register(void) { return 1; }
 int simcons_register(void);
 #endif
 
+struct tty_driver;
+extern struct tty_driver *hp_simserial_driver;
+
+void ia64_ssc_connect_irq(long intr, long irq);
+void ia64_ctl_trace(long on);
+
 #endif