feat(fvp): add spmd logical partition

This patch changes spmd.mk to include one or more SPMD logical
partitions specific to a platform. It also adds a basic SPMD logical
partition to fvp.

Change-Id: I2075e0458c92813913b28cbf4cfffc1f151e65cf
Signed-off-by: Raghu Krishnamurthy <raghu.ncstate@gmail.com>

plat/arm/board/fvp/fvp_spmd_logical_sp.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2023, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+#include <common/debug.h>
+#include <services/el3_spmd_logical_sp.h>
+#include <services/ffa_svc.h>
+#include <smccc_helpers.h>
+
+#define SPMD_LP_PARTITION_ID SPMD_LP_ID_START
+#define SPMD_LP_UUID {0xe98e43ad, 0xb7db524f, 0x47a3bf57, 0x1588f4e3}
+
+/* SPMD Logical SP currently only supports sending direct message. */
+#define SPMD_PARTITION_PROPERTIES FFA_PARTITION_DIRECT_REQ_SEND
+
+static int32_t fvp_spmd_logical_partition_init(void)
+{
+	INFO("FVP SPMD LSP: Init function called.\n");
+	return 0;
+}
+
+/* Register SPMD logical partition  */
+DECLARE_SPMD_LOGICAL_PARTITION(
+	fvp_spmd_logical_partition,
+	fvp_spmd_logical_partition_init,/* Init Function */
+	SPMD_LP_PARTITION_ID,		/* FF-A Partition ID */
+	SPMD_LP_UUID,			/* UUID */
+	SPMD_PARTITION_PROPERTIES	/* Partition Properties. */
+);

services/std_svc/spmd/spmd.mk

@@ -18,6 +18,16 @@ SPMD_SOURCES	+=	$(addprefix services/std_svc/spmd/,	\
 			spmd_main.c				\
 			spmd_logical_sp.c)
 
+# Specify platform specific SPMD logical partition implementation.
+SPMD_LP_SOURCES  := $(wildcard $(addprefix ${PLAT_DIR}/, \
+					${PLAT}_spmd_logical_sp*.c))
+
+ifeq (${ENABLE_SPMD_LP}, 1)
+ifneq ($(wildcard $(SPMD_LP_SOURCES)),)
+SPMD_SOURCES += $(SPMD_LP_SOURCES)
+endif
+endif
+
 # Let the top-level Makefile know that we intend to include a BL32 image
 NEED_BL32		:=	yes