diff --git a/lib/romlib/init.s b/lib/romlib/init.s
new file mode 100644
index 0000000..5cf2aca
--- /dev/null
+++ b/lib/romlib/init.s
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+	.globl	rom_lib_init
+	.extern	__DATA_RAM_START__, __DATA_ROM_START__, __DATA_SIZE__
+	.extern	memset, memcpy
+
+rom_lib_init:
+	cmp	w0, #1
+	mov	w0, #0
+	b.le	1f
+	ret
+
+1:	stp	x29, x30, [sp, #-16]!
+	adrp	x0, __DATA_RAM_START__
+	ldr	x1,= __DATA_ROM_START__
+	ldr	x2, =__DATA_SIZE__
+	bl	memcpy
+
+	ldr	x0, =__BSS_START__
+	mov	x1, #0
+	ldr	x2, =__BSS_SIZE__
+	bl	memset
+	ldp	x29, x30, [sp], #16
+
+	mov	w0, #1
+	ret