diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h
index 12b15ad1e5863bc28a3094c0c08721c2c2b83dc4..27d7a528b41ae53d35c9ac24f0d75b4046a7de53 100644
--- a/arch/xtensa/platforms/iss/include/platform/simcall.h
+++ b/arch/xtensa/platforms/iss/include/platform/simcall.h
@@ -76,6 +76,11 @@ static inline int __simc(int a, int b, int c, int d)
 	return ret;
 }
 
+static inline int simc_exit(int exit_code)
+{
+	return __simc(SYS_exit, exit_code, 0, 0);
+}
+
 static inline int simc_open(const char *file, int flags, int mode)
 {
 	return __simc(SYS_open, (int) file, flags, mode);
diff --git a/arch/xtensa/platforms/iss/setup.c b/arch/xtensa/platforms/iss/setup.c
index e29e1b41ef9698cdf7b823a2ea1949af6283cb76..379aeddcc63886c9368bfab1d4189ef8f21837da 100644
--- a/arch/xtensa/platforms/iss/setup.c
+++ b/arch/xtensa/platforms/iss/setup.c
@@ -32,6 +32,8 @@
 #include <asm/platform.h>
 #include <asm/bootparam.h>
 
+#include <platform/simcall.h>
+
 
 void __init platform_init(bp_tag_t* bootparam)
 {
@@ -41,13 +43,13 @@ void __init platform_init(bp_tag_t* bootparam)
 void platform_halt(void)
 {
 	pr_info(" ** Called platform_halt() **\n");
-	__asm__ __volatile__("movi a2, 1\nsimcall\n");
+	simc_exit(0);
 }
 
 void platform_power_off(void)
 {
 	pr_info(" ** Called platform_power_off() **\n");
-	__asm__ __volatile__("movi a2, 1\nsimcall\n");
+	simc_exit(0);
 }
 void platform_restart(void)
 {
@@ -80,7 +82,7 @@ void platform_heartbeat(void)
 static int
 iss_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
-	__asm__ __volatile__("movi a2, -1; simcall\n");
+	simc_exit(1);
 	return NOTIFY_DONE;
 }