MLECO-2984: Refactor components

* Use UART component from Ethos-U core-platform
* Components as cmake project

Change-Id: I053f3a59800abc20216e6a4df8555db357e3f21d
Signed-off-by: Isabella Gottardi <isabella.gottardi@arm.com>
diff --git a/source/hal/components/ethosu_npu_init/CMakeLists.txt b/source/hal/components/ethosu_npu_init/CMakeLists.txt
new file mode 100644
index 0000000..57eef61
--- /dev/null
+++ b/source/hal/components/ethosu_npu_init/CMakeLists.txt
@@ -0,0 +1,98 @@
+#----------------------------------------------------------------------------
+#  Copyright (c) 2022 Arm Limited. All rights reserved.
+#  SPDX-License-Identifier: Apache-2.0
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#----------------------------------------------------------------------------
+
+#########################################################
+#         Ethos-U NPU initialization library            #
+#########################################################
+
+cmake_minimum_required(VERSION 3.15.6)
+set(ETHOS_U_NPU_INIT_COMPONENT ethosu_npu_init_component)
+project(${ETHOS_U_NPU_INIT_COMPONENT}
+    DESCRIPTION     "Ethos-U NPU initialization library"
+    LANGUAGES       C CXX ASM)
+
+if (NOT DEFINED ETHOS_U_NPU_DRIVER_SRC_PATH)
+    message(FATAL_ERROR "ETHOS_U_NPU_DRIVER_SRC_PATH should"
+            " be defined when ETHOS_U_NPU_ENABLED=${ETHOS_U_NPU_ENABLED}")
+endif()
+
+# For the driver, we need to provide the CMSIS_PATH variable
+set(CMSIS_PATH ${CMSIS_SRC_PATH} CACHE PATH "Path to CMSIS directory")
+add_subdirectory(${ETHOS_U_NPU_DRIVER_SRC_PATH} ${CMAKE_BINARY_DIR}/ethos-u-driver)
+
+# Create static library
+add_library(${ETHOS_U_NPU_INIT_COMPONENT} STATIC)
+
+## Include directories - public
+target_include_directories(${ETHOS_U_NPU_INIT_COMPONENT}
+    PUBLIC
+    include
+    ${SOURCE_GEN_DIR})
+
+## Component sources
+target_sources(${ETHOS_U_NPU_INIT_COMPONENT}
+    PRIVATE
+    ethosu_npu_init.c)
+
+## Add dependencies:
+target_link_libraries(${ETHOS_U_NPU_INIT_COMPONENT} PUBLIC
+    cmsis_device
+    ethosu_core_driver
+    log)
+
+## Memory mode target definition
+if (NOT DEFINED ETHOS_U_NPU_ID)
+    set(ETHOS_U_NPU_ID U55)
+endif()
+
+if (NOT DEFINED ETHOS_U_NPU_MEMORY_MODE)
+    set(ETHOS_U_NPU_MEMORY_MODE Shared_Sram)
+endif()
+
+if (ETHOS_U_NPU_MEMORY_MODE STREQUAL Sram_Only)
+    if (ETHOS_U_NPU_ID STREQUAL U55)
+        set(ETHOS_U_NPU_MEMORY_MODE_FLAG "-DETHOS_U_NPU_MEMORY_MODE=ETHOS_U_NPU_MEM_MODE_SRAM_ONLY")
+    else ()
+        message(FATAL_ERROR "Non compatible Ethos-U NPU memory mode and processor ${ETHOS_U_NPU_MEMORY_MODE} - ${ETHOS_U_NPU_ID}. `sram_only` can be used only for Ethos-U55.")
+    endif ()
+
+elseif (ETHOS_U_NPU_MEMORY_MODE STREQUAL Shared_Sram)
+    # Shared Sram can be used for Ethos-U55 and Ethos-U65
+    set(ETHOS_U_NPU_MEMORY_MODE_FLAG "-DETHOS_U_NPU_MEMORY_MODE=ETHOS_U_NPU_MEMORY_MODE_SHARED_SRAM")
+
+elseif (ETHOS_U_NPU_MEMORY_MODE STREQUAL Dedicated_Sram)
+    # Dedicated Sram is used only for Ethos-U65
+    if (ETHOS_U_NPU_ID STREQUAL U65)
+        list(APPEND ETHOS_U_NPU_MEMORY_MODE_FLAG "-DETHOS_U_NPU_MEMORY_MODE=ETHOS_U_NPU_MEMORY_MODE_DEDICATED_SRAM" "-DETHOS_U_NPU_CACHE_SIZE=${ETHOS_U_NPU_CACHE_SIZE}")
+    else ()
+        message(FATAL_ERROR "Non compatible Ethos-U NPU memory mode and processor ${ETHOS_U_NPU_MEMORY_MODE} - ${ETHOS_U_NPU_ID}. `dedicated_sram` can be used only for Ethos-U65.")
+    endif ()
+
+else ()
+    message(FATAL_ERROR "Non compatible Ethos-U NPU memory mode ${ETHOS_U_NPU_MEMORY_MODE}")
+
+endif ()
+
+target_compile_definitions(${ETHOS_U_NPU_INIT_COMPONENT}
+    PUBLIC
+    ${ETHOS_U_NPU_MEMORY_MODE_FLAG})
+
+# Display status
+message(STATUS "CMAKE_CURRENT_SOURCE_DIR: " ${CMAKE_CURRENT_SOURCE_DIR})
+message(STATUS "*******************************************************")
+message(STATUS "Library                                : " ${ETHOS_U_NPU_INIT_COMPONENT})
+message(STATUS "*******************************************************")
diff --git a/source/hal/components/ethosu_npu_init/include/ethosu_mem_config.h b/source/hal/components/ethosu_npu_init/include/ethosu_mem_config.h
new file mode 100644
index 0000000..aa0cfda
--- /dev/null
+++ b/source/hal/components/ethosu_npu_init/include/ethosu_mem_config.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ETHOS_U_NPU_MEM_CONFIG_H
+#define ETHOS_U_NPU_MEM_CONFIG_H
+
+#define ETHOS_U_NPU_MEMORY_MODE_SRAM_ONLY           0
+#define ETHOS_U_NPU_MEMORY_MODE_SHARED_SRAM         1
+#define ETHOS_U_NPU_MEMORY_MODE_DEDICATED_SRAM      2
+
+#define ETHOS_U_MEM_BYTE_ALIGNMENT                  16
+
+#ifndef ETHOS_U_NPU_MEMORY_MODE
+    #define ETHOS_U_NPU_MEMORY_MODE                 ETHOS_U_MEMORY_MODE_SHARED_SRAM
+#endif /* ETHOS_U_NPU_MEMORY_MODE */
+
+#if (ETHOS_U_NPU_MEMORY_MODE==ETHOS_U_NPU_MEMORY_MODE_DEDICATED_SRAM)
+    #ifndef ETHOS_U_NPU_CACHE_SIZE
+        #define ETHOS_U_CACHE_BUF_SZ                (393216U)  /* See vela doc for reference */
+    #else
+        #define ETHOS_U_CACHE_BUF_SZ                ETHOS_U_NPU_CACHE_SIZE
+    #endif /* ETHOS_U_NPU_CACHE_SIZE */
+#else
+    #define ETHOS_U_CACHE_BUF_SZ    (0U)
+#endif /* CACHE_BUF_SZ */
+
+/**
+ * Activation buffer aka tensor arena section name
+ * We have to place the tensor arena in different region based on the memory config.
+ **/
+#if (ETHOS_U_NPU_MEMORY_MODE==ETHOS_U_NPU_MEMORY_MODE_SHARED_SRAM)
+    #define ACTIVATION_BUF_SECTION      section(".bss.NoInit.activation_buf_sram")
+    #define ACTIVATION_BUF_SECTION_NAME ("SRAM")
+#elif (ETHOS_U_NPU_MEMORY_MODE==ETHOS_U_NPU_MEMORY_MODE_SRAM_ONLY)
+    #define ACTIVATION_BUF_SECTION      section(".bss.NoInit.activation_buf_sram")
+    #define ACTIVATION_BUF_SECTION_NAME ("SRAM")
+#elif (ETHOS_U_NPU_MEMORY_MODE==ETHOS_U_NPU_MEMORY_MODE_DEDICATED_SRAM)
+    #define ACTIVATION_BUF_SECTION      section("activation_buf_dram")
+    #define CACHE_BUF_SECTION           section(".bss.NoInit.ethos_u_cache")
+    #define ACTIVATION_BUF_SECTION_NAME ("DDR/DRAM")
+    #define CACHE_BUF_ATTRIBUTE         __attribute__((aligned(ETHOS_U_MEM_BYTE_ALIGNMENT), CACHE_BUF_SECTION))
+#endif
+
+#endif /* ETHOS_U_NPU_MEM_CONFIG_H */