layerscape: Initial TF-A support for LS1043ardb

This patch introduce TF-A support for NXP's ls1043a platform.
more details information of ls1043a chip and ls1043ardb board
can be found at docs/plat/ls1043a.rst.

Boot sequence on ls1043a is: bootrom loads bl1 firstly, then bl1
loads bl2, bl2 will load bl31, bl32 and bl33, bl31 will boot
bl32(tee os) and bl33(u-boot or uefi), bl33 boot Linux kernel.

Now TF-A on ls1043ardb platform has the following features in this patch:
	* Support boot from Nor flash.
	* TF-A can boot bl33 which runs in el2 of non-secure world.
	* TF-A boot OPTee OS.
	* Support PSCI

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Chenyin.Ha <Chenyin.Ha@nxp.com>
Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com>
Signed-off-by: jiaheng.fan <jiaheng.fan@nxp.com>
Signed-off-by: Wen He <wen.he_1@nxp.com>
diff --git a/plat/layerscape/board/ls1043/ls1043_topology.c b/plat/layerscape/board/ls1043/ls1043_topology.c
new file mode 100644
index 0000000..12d2830
--- /dev/null
+++ b/plat/layerscape/board/ls1043/ls1043_topology.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <cassert.h>
+#include "plat_ls.h"
+#include "platform_def.h"
+
+unsigned char ls1043_power_domain_tree_desc[LS1043_CLUSTER_COUNT + 1];
+
+
+CASSERT(LS1043_CLUSTER_COUNT && LS1043_CLUSTER_COUNT <= 256,
+		assert_invalid_ls1043_cluster_count);
+
+/*******************************************************************************
+ * This function dynamically constructs the topology according to
+ * LS1043_CLUSTER_COUNT and returns it.
+ ******************************************************************************/
+const unsigned char *plat_get_power_domain_tree_desc(void)
+{
+	int i;
+
+	ls1043_power_domain_tree_desc[0] = LS1043_CLUSTER_COUNT;
+
+	for (i = 0; i < LS1043_CLUSTER_COUNT; i++)
+		ls1043_power_domain_tree_desc[i + 1] =
+						LS1043_MAX_CPUS_PER_CLUSTER;
+
+	return ls1043_power_domain_tree_desc;
+}
+
+/*******************************************************************************
+ * This function returns the core count within the cluster corresponding to
+ * `mpidr`.
+ ******************************************************************************/
+unsigned int plat_ls_get_cluster_core_count(u_register_t mpidr)
+{
+	return LS1043_MAX_CPUS_PER_CLUSTER;
+}
+
+/*******************************************************************************
+ * This function implements a part of the critical interface between the psci
+ * generic layer and the platform that allows the former to query the platform
+ * to convert an MPIDR to a unique linear index. An error code (-1) is returned
+ * in case the MPIDR is invalid.
+ ******************************************************************************/
+int plat_core_pos_by_mpidr(u_register_t mpidr)
+{
+	if (ls_check_mpidr(mpidr) == -1)
+		return -1;
+
+	return plat_ls_calc_core_pos(mpidr);
+}