diff --git a/plat/hisilicon/hikey960/hikey960_def.h b/plat/hisilicon/hikey960/hikey960_def.h
index e713e2e..fc46d71 100644
--- a/plat/hisilicon/hikey960/hikey960_def.h
+++ b/plat/hisilicon/hikey960/hikey960_def.h
@@ -16,6 +16,25 @@
 #define DEVICE_BASE			0xE0000000
 #define DEVICE_SIZE			0x20000000
 
+/* Memory location options for TSP */
+#define HIKEY960_SRAM_ID	0
+#define HIKEY960_DRAM_ID	1
+
+/*
+ * DDR for OP-TEE (32MB from 0x3E00000-0x3FFFFFFF) is divided in several
+ * regions:
+ *   - Secure DDR (default is the top 16MB) used by OP-TEE
+ *   - Non-secure DDR used by OP-TEE (shared memory and padding) (4MB)
+ *   - Secure DDR (4MB aligned on 4MB) for OP-TEE's "Secure Data Path" feature
+ *   - Non-secure DDR (8MB) reserved for OP-TEE's future use
+ */
+#define DDR_SEC_SIZE			0x01000000
+#define DDR_SEC_BASE			0x3F000000
+
+#define DDR_SDP_SIZE			0x00400000
+#define DDR_SDP_BASE			(DDR_SEC_BASE - 0x400000 /* align */ - \
+					DDR_SDP_SIZE)
+
 /*
  * PL011 related constants
  */