diff --git a/plat/imx/common/include/imx_sip_svc.h b/plat/imx/common/include/imx_sip_svc.h
index 0a2d750..6c7a760 100644
--- a/plat/imx/common/include/imx_sip_svc.h
+++ b/plat/imx/common/include/imx_sip_svc.h
@@ -17,6 +17,10 @@
 #define IMX_SIP_BUILDINFO			0xC2000003
 #define IMX_SIP_BUILDINFO_GET_COMMITHASH	0x00
 
+#define IMX_SIP_SRC			0xC2000005
+#define IMX_SIP_SRC_SET_SECONDARY_BOOT	0x10
+#define IMX_SIP_SRC_IS_SECONDARY_BOOT	0x11
+
 #define IMX_SIP_GET_SOC_INFO		0xC2000006
 
 #define IMX_SIP_WAKEUP_SRC		0xC2000009
@@ -38,6 +42,11 @@
 			 u_register_t x2, u_register_t x3);
 #endif
 
+#if defined(PLAT_imx8mm) || defined(PLAT_imx8mq)
+int imx_src_handler(uint32_t smc_fid, u_register_t x1,
+		    u_register_t x2, u_register_t x3, void *handle);
+#endif
+
 #if (defined(PLAT_imx8qm) || defined(PLAT_imx8qx))
 int imx_cpufreq_handler(uint32_t smc_fid, u_register_t x1,
 			u_register_t x2, u_register_t x3);