4 files changed, 49 insertions, 12 deletions
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 41d1b66c1..421c8e98f 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -331,9 +331,11 @@ endif
 ifeq (${ARCH}, aarch64)
 BL31_SOURCES		+=	plat/arm/common/aarch64/execution_state_switch.c\
 				plat/arm/common/arm_sip_svc.c			\
+				plat/arm/common/plat_arm_sip_svc.c		\
 				${ARM_SVC_HANDLER_SRCS}
 else
 BL32_SOURCES		+=	plat/arm/common/arm_sip_svc.c			\
+				plat/arm/common/plat_arm_sip_svc.c		\
 				${ARM_SVC_HANDLER_SRCS}
 endif
 endif
diff --git a/plat/arm/common/arm_sip_svc.c b/plat/arm/common/arm_sip_svc.c
index 352d47751..09226f4b7 100644
--- a/plat/arm/common/arm_sip_svc.c
+++ b/plat/arm/common/arm_sip_svc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2023, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -13,9 +13,6 @@
 #include <lib/pmf/pmf.h>
 #include <plat/arm/common/arm_sip_svc.h>
 #include <plat/arm/common/plat_arm.h>
-#if ENABLE_SPMD_LP
-#include <services/el3_spmd_logical_sp.h>
-#endif
 #include <tools_share/uuid.h>
 
 /* ARM SiP Service UUID */
@@ -136,15 +133,16 @@ static uintptr_t arm_sip_handler(unsigned int smc_fid,
 		SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR);
 
 	default:
-#if ENABLE_SPMD_LP
-		return plat_spmd_logical_sp_smc_handler(smc_fid, x1, x2, x3, x4,
-				cookie, handle, flags);
-#else
-		WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid);
-		SMC_RET1(handle, SMC_UNK);
-#endif
+		break;
 	}
 
+	/*
+	 * Fall back to allow Arm platform specific handler.
+	 * TODO: Refactor needed to move out generic handlers from this file and
+	 * only keep Arm Platform specific handlers here.
+	 */
+	return plat_arm_sip_handler(smc_fid, x1, x2, x3, x4,
+					cookie, handle, flags);
 }
 
 
diff --git a/plat/arm/common/plat_arm_sip_svc.c b/plat/arm/common/plat_arm_sip_svc.c
new file mode 100644
index 000000000..33e872b58
--- /dev/null
+++ b/plat/arm/common/plat_arm_sip_svc.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+
+#include <plat/arm/common/arm_sip_svc.h>
+#include <plat/common/platform.h>
+
+#if ENABLE_SPMD_LP
+#include <services/el3_spmd_logical_sp.h>
+#endif
+
+uintptr_t plat_arm_sip_handler(uint32_t smc_fid,
+				u_register_t x1,
+				u_register_t x2,
+				u_register_t x3,
+				u_register_t x4,
+				void *cookie,
+				void *handle,
+				u_register_t flags)
+{
+#if ENABLE_SPMD_LP
+	return plat_spmd_logical_sp_smc_handler(smc_fid, x1, x2, x3, x4,
+				cookie, handle, flags);
+#else
+	WARN("Unimplemented ARM SiP Service Call: 0x%x\n", smc_fid);
+	SMC_RET1(handle, SMC_UNK);
+#endif
+}
diff --git a/plat/nuvoton/npcm845x/platform.mk b/plat/nuvoton/npcm845x/platform.mk
index 5120cc6c6..cb5a55352 100644
--- a/plat/nuvoton/npcm845x/platform.mk
+++ b/plat/nuvoton/npcm845x/platform.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2023, Arm Limited and Contributors. All rights reserved.
 #
 # Copyright (c) 2017-2023 Nuvoton Ltd.
 #
@@ -273,9 +273,11 @@ ifeq (${ENABLE_PMF}, 1)
 ifeq (${ARCH}, aarch64)
 BL31_SOURCES	+=	plat/arm/common/aarch64/execution_state_switch.c \
 		plat/arm/common/arm_sip_svc.c \
+		plat/arm/common/plat_arm_sip_svc.c \
 		lib/pmf/pmf_smc.c
 else
 BL32_SOURCES	+=	plat/arm/common/arm_sip_svc.c \
+		plat/arm/common/plat_arm_sip_svc.c \
 		lib/pmf/pmf_smc.c
 endif
 endif