diff --git a/plat/socionext/uniphier/uniphier_helpers.S b/plat/socionext/uniphier/uniphier_helpers.S
new file mode 100644
index 0000000..105cf9e
--- /dev/null
+++ b/plat/socionext/uniphier/uniphier_helpers.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+#include <platform_def.h>
+
+	.global	uniphier_calc_core_pos
+	.global	plat_my_core_pos
+	.globl	platform_mem_init
+
+/*
+ * unsigned int uniphier_calc_core_pos(u_register_t mpidr)
+ * core_pos = (cluster_id * max_cpus_per_cluster) + core_id
+ */
+func uniphier_calc_core_pos
+	and	x1, x0, #MPIDR_CPU_MASK
+	and	x0, x0, #MPIDR_CLUSTER_MASK
+	lsr	x0, x0, #MPIDR_AFFINITY_BITS
+	mov	x2, #UNIPHIER_MAX_CPUS_PER_CLUSTER
+	madd	x0, x0, x2, x1
+	ret
+endfunc uniphier_calc_core_pos
+
+func plat_my_core_pos
+	mrs	x0, mpidr_el1
+	b	uniphier_calc_core_pos
+endfunc plat_my_core_pos
+
+func platform_mem_init
+	ret
+endfunc platform_mem_init