diff --git a/realm/realm_helpers.c b/realm/realm_helpers.c
index 6a3c57d..bf47efc 100644
--- a/realm/realm_helpers.c
+++ b/realm/realm_helpers.c
@@ -5,6 +5,10 @@
  */
 
 #include <stdlib.h>
+#include <realm_helpers.h>
+#include <realm_psi.h>
+#include <realm_rsi.h>
+#include <smccc.h>
 
 /* Generate 64-bit random number */
 unsigned long long realm_rand64(void)
@@ -12,3 +16,26 @@
 	return ((unsigned long long)rand() << 32) | rand();
 }
 
+/* This function will call the Host to request IPA of the NS shared buffer */
+u_register_t realm_get_ns_buffer(void)
+{
+	smc_ret_values res = {};
+	struct rsi_host_call host_cal __aligned(sizeof(struct rsi_host_call));
+
+	host_cal.imm = HOST_CALL_GET_SHARED_BUFF_CMD;
+	res = tftf_smc(&(smc_args) {RSI_HOST_CALL, (u_register_t)&host_cal,
+		0UL, 0UL, 0UL, 0UL, 0UL, 0UL});
+
+	if (res.ret0 != RSI_SUCCESS) {
+		/* retry with PSI */
+		hvc_ret_values ret = tftf_hvc(&(hvc_args) {PSI_CALL_GET_SHARED_BUFF_CMD, 0UL, 0UL,
+			0UL, 0UL, 0UL, 0UL, 0UL});
+
+		if (ret.ret0 != RSI_SUCCESS) {
+			return 0U;
+		}
+		return ret.ret1;
+	}
+
+	return host_cal.gprs[0];
+}