diff --git a/plat/arm/board/rde1edge/rde1edge_topology.c b/plat/arm/board/rde1edge/rde1edge_topology.c
new file mode 100644
index 0000000..0b56f20
--- /dev/null
+++ b/plat/arm/board/rde1edge/rde1edge_topology.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2019-2020, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <plat/arm/common/plat_arm.h>
+
+/******************************************************************************
+ * The power domain tree descriptor.
+ ******************************************************************************/
+static const unsigned char rde1edge_pd_tree_desc[] = {
+	PLAT_ARM_CLUSTER_COUNT,
+	CSS_SGI_MAX_CPUS_PER_CLUSTER,
+	CSS_SGI_MAX_CPUS_PER_CLUSTER
+};
+
+/******************************************************************************
+ * This function returns the topology tree information.
+ ******************************************************************************/
+const unsigned char *plat_get_power_domain_tree_desc(void)
+{
+	return rde1edge_pd_tree_desc;
+}
+
+/*******************************************************************************
+ * The array mapping platform core position (implemented by plat_my_core_pos())
+ * to the SCMI power domain ID implemented by SCP.
+ ******************************************************************************/
+const uint32_t plat_css_core_pos_to_scmi_dmn_id_map[] = {
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,		\
+	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
+};