#----------------------------------------------------------------------------
#  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.
#----------------------------------------------------------------------------

#########################################################
#                       HAL library                     #
#########################################################

cmake_minimum_required(VERSION 3.15.6)

set(HAL_TARGET hal)

project(${HAL_TARGET}
    DESCRIPTION     "HAL library"
    LANGUAGES       C CXX)

# Create static library
add_library(${HAL_TARGET} STATIC)

# Select which profile needs to be used:
if (${CMAKE_CROSSCOMPILING})
    set(PLATFORM_PROFILE bare-metal)
else()
    set(PLATFORM_PROFILE native)
endif()

set(PLATFORM_PROFILE_DIR    profiles/${PLATFORM_PROFILE})

## Common include directories - public
target_include_directories(${HAL_TARGET}
    PUBLIC
    include
    ${PLATFORM_PROFILE_DIR}/timer/include
    ${PLATFORM_PROFILE_DIR}/utils/include)

## Common sources for all profiles
target_sources(${HAL_TARGET}
    PRIVATE
    hal.c
    ${PLATFORM_PROFILE_DIR}/data_presentation/data_psn.c
    ${PLATFORM_PROFILE_DIR}/data_acquisition/data_acq.c
    ${PLATFORM_PROFILE_DIR}/timer/platform_timer.c
    ${PLATFORM_PROFILE_DIR}/utils/system_init.c)

if (DEFINED VERIFY_TEST_OUTPUT)
    message(STATUS "Test output verification flag is: ${VERIFY_TEST_OUTPUT}")
    target_compile_definitions(${HAL_TARGET} PUBLIC
        VERIFY_TEST_OUTPUT=${VERIFY_TEST_OUTPUT})
endif ()

############################ bare-metal profile #############################
if (PLATFORM_PROFILE STREQUAL bare-metal)

    if (NOT DEFINED PLATFORM_DRIVERS_DIR)
        message(FATAL_ERROR "PLATFORM_DRIVERS_DIR need to be defined for this target")
    endif()

    ## Additional include directories - public
    target_include_directories(${HAL_TARGET}
        PUBLIC
        ${PLATFORM_PROFILE_DIR}/bsp/include)

    ## Additional include directories - private
    target_include_directories(${HAL_TARGET}
        PRIVATE
        ${PLATFORM_PROFILE_DIR}/data_presentation/lcd/include)

    ## Additional sources - public
    target_sources(${HAL_TARGET}
        PUBLIC
        ${PLATFORM_PROFILE_DIR}/bsp/retarget.c)

    ## Additional sources - private
    target_sources(${HAL_TARGET}
        PRIVATE
        ${PLATFORM_PROFILE_DIR}/data_presentation/lcd/lcd_img.c)

    ## Compile definition:
    target_compile_definitions(${HAL_TARGET}
        PUBLIC
        PLATFORM_HAL=PLATFORM_CORTEX_M_BAREMETAL)

    # Add dependencies for platform_driver first, in case they are needed by it.
    add_subdirectory(cmsis_device ${CMAKE_BINARY_DIR}/cmsis_device)

    # Add platform-drivers target
    add_subdirectory(${PLATFORM_DRIVERS_DIR} ${CMAKE_BINARY_DIR}/platform_driver)

    # Link time library targets:
    target_link_libraries(${HAL_TARGET}
        PUBLIC
        log
        platform-drivers)

    # If Ethos-U is enabled, we need the driver library too
    if (ETHOS_U_NPU_ENABLED)

        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()

        # Timing adapter, should, in theory be part of platform-drivers. For now
        # limiting the scope of refactoring - but in future, TA should not be
        # needed if not available on the target platform.
        if (NOT DEFINED ETHOS_U_NPU_TIMING_ADAPTER_SRC_PATH)
            message(FATAL_ERROR "ETHOS_U_NPU_TIMING_ADAPTER_SRC_PATH should"
                    " be defined when ETHOS_U_NPU_ENABLED=${ETHOS_U_NPU_ENABLED}")
        endif()

        target_compile_definitions(${HAL_TARGET}
            PUBLIC
            ARM_NPU)

        # 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} ${CMAKE_BINARY_DIR}/ethos-u-driver)
        add_subdirectory(${ETHOS_U_NPU_TIMING_ADAPTER_SRC_PATH} ${CMAKE_BINARY_DIR}/timing-adapter)

        target_link_libraries(${HAL_TARGET}
            PUBLIC
            ethosu_core_driver
            timing_adapter)

        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)
                set(ETHOS_U_NPU_MEMORY_MODE_FLAG  "-DETHOS_U_NPU_MEMORY_MODE=ETHOS_U_NPU_MEMORY_MODE_DEDICATED_SRAM")
            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(${HAL_TARGET}
            PUBLIC
            ${ETHOS_U_NPU_MEMORY_MODE_FLAG})
    endif()

############################   native profile   #############################
elseif (PLATFORM_PROFILE STREQUAL native)
    ## Additional include directories - private
    target_include_directories(${HAL_TARGET}
        PRIVATE
        ${PLATFORM_PROFILE_DIR}/data_presentation/log/include)

    ## Additional sources - private
    target_sources(${HAL_TARGET}
        PRIVATE
        ${PLATFORM_PROFILE_DIR}/data_presentation/log/log.c)

    ## Compile definition:
    target_compile_definitions(${HAL_TARGET}
        PUBLIC
        PLATFORM_HAL=PLATFORM_UNKNOWN_LINUX_OS
        ACTIVATION_BUF_SRAM_SZ=0)

    target_link_libraries(${HAL_TARGET}
        PUBLIC
        log)

endif()

# Display status:
message(STATUS "CMAKE_CURRENT_SOURCE_DIR: " ${CMAKE_CURRENT_SOURCE_DIR})
message(STATUS "*******************************************************")
message(STATUS "Library                                : " ${HAL_TARGET})
message(STATUS "CMAKE_SYSTEM_PROCESSOR                 : " ${CMAKE_SYSTEM_PROCESSOR})
message(STATUS "*******************************************************")