lib: add support for A78 Baremetal

Enable cache, IPI, exception and shared-memory operations on Versal A78
for Libmetal.

Signed-off-by: Ben Levinsky <ben.levinsky@amd.com>

lib/system/generic/xlnx_common/zynqmp_aarch64/sys.c

@@ -19,7 +19,9 @@
 #include "xil_mmu.h"
 #include "xscugic.h"
 
-#if defined(versal)
+#ifdef VERSAL_NET
+#include "xcpu_cortexa78.h"
+#elif defined(versal)
 #include "xcpu_cortexa72.h"
 #else
 #include "xreg_cortexa53.h"

lib/system/generic/zynqmp_a78/CMakeLists.txt

@@ -0,0 +1,3 @@
+collect (PROJECT_LIB_HEADERS sys.h)
+
+add_subdirectory(../xlnx_common ${CMAKE_CURRENT_BINARY_DIR}/../xlnx_common)

lib/system/generic/zynqmp_a78/sys.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2022, Xilinx Inc. and Contributors. All rights reserved.
+ * Copyright (c) 2022-2023 Advanced Micro Devices, Inc. All Rights Reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	generic/zynqmp_a78/sys.h
+ * @brief	generic zynqmp_a78 system primitives for libmetal.
+ */
+
+/*
+ * The header file is still required as generic/sys.h expects
+ * "./@PROJECT_MACHINE@/sys.h" to still exist.
+ */
+#include <metal/system/@PROJECT_SYSTEM@/xlnx_common/zynqmp_aarch64/sys.h>