1# This is a copy of <FREERTOS_KERNEL_PATH>/portable/ThirdParty/GCC/RP2040/FREERTOS_KERNEL_import.cmake
2
3# This can be dropped into an external project to help locate the FreeRTOS kernel
4# It should be include()ed prior to project(). Alternatively this file may
5# or the CMakeLists.txt in this directory may be included or added via add_subdirectory
6# respectively.
7
8if (DEFINED ENV{FREERTOS_KERNEL_PATH} AND (NOT FREERTOS_KERNEL_PATH))
9    set(FREERTOS_KERNEL_PATH $ENV{FREERTOS_KERNEL_PATH})
10    message("Using FREERTOS_KERNEL_PATH from environment ('${FREERTOS_KERNEL_PATH}')")
11endif ()
12
13# first pass we look in old tree; second pass we look in new tree
14foreach(SEARCH_PASS RANGE 0 1)
15    if (SEARCH_PASS)
16        # ports may be moving to submodule in the future
17        set(FREERTOS_KERNEL_RP2040_RELATIVE_PATH "portable/ThirdParty/Community-Supported-Ports/GCC")
18        set(FREERTOS_KERNEL_RP2040_BACK_PATH "../../../../..")
19    else()
20        set(FREERTOS_KERNEL_RP2040_RELATIVE_PATH "portable/ThirdParty/GCC")
21        set(FREERTOS_KERNEL_RP2040_BACK_PATH "../../../..")
22    endif()
23
24    if(PICO_PLATFORM STREQUAL "rp2040")
25        set(FREERTOS_KERNEL_RP2040_RELATIVE_PATH "${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}/RP2040")
26    else()
27        if (PICO_PLATFORM STREQUAL "rp2350-riscv")
28            set(FREERTOS_KERNEL_RP2040_RELATIVE_PATH "${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}/RP2350_RISC-V")
29        else()
30            set(FREERTOS_KERNEL_RP2040_RELATIVE_PATH "${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}/RP2350_ARM_NTZ")
31        endif()
32    endif()
33
34    if (NOT FREERTOS_KERNEL_PATH)
35        # check if we are inside the FreeRTOS kernel tree (i.e. this file has been included directly)
36        get_filename_component(_ACTUAL_PATH ${CMAKE_CURRENT_LIST_DIR} REALPATH)
37        get_filename_component(_POSSIBLE_PATH ${CMAKE_CURRENT_LIST_DIR}/${FREERTOS_KERNEL_RP2040_BACK_PATH}/${FREERTOS_KERNEL_RP2040_RELATIVE_PATH} REALPATH)
38        if (_ACTUAL_PATH STREQUAL _POSSIBLE_PATH)
39            get_filename_component(FREERTOS_KERNEL_PATH ${CMAKE_CURRENT_LIST_DIR}/${FREERTOS_KERNEL_RP2040_BACK_PATH} REALPATH)
40        endif()
41        if (_ACTUAL_PATH STREQUAL _POSSIBLE_PATH)
42            get_filename_component(FREERTOS_KERNEL_PATH ${CMAKE_CURRENT_LIST_DIR}/${FREERTOS_KERNEL_RP2040_BACK_PATH} REALPATH)
43            message("Setting FREERTOS_KERNEL_PATH to ${FREERTOS_KERNEL_PATH} based on location of FreeRTOS-Kernel-import.cmake")
44            break()
45        elseif (PICO_SDK_PATH AND EXISTS "${PICO_SDK_PATH}/../FreeRTOS-Kernel")
46            set(FREERTOS_KERNEL_PATH ${PICO_SDK_PATH}/../FreeRTOS-Kernel)
47            message("Defaulting FREERTOS_KERNEL_PATH as sibling of PICO_SDK_PATH: ${FREERTOS_KERNEL_PATH}")
48            break()
49        endif()
50    endif ()
51
52    if (NOT FREERTOS_KERNEL_PATH)
53        foreach(POSSIBLE_SUFFIX Source FreeRTOS-Kernel FreeRTOS/Source)
54            # check if FreeRTOS-Kernel exists under directory that included us
55            set(SEARCH_ROOT ${CMAKE_CURRENT_SOURCE_DIR})
56            get_filename_component(_POSSIBLE_PATH ${SEARCH_ROOT}/${POSSIBLE_SUFFIX} REALPATH)
57            if (EXISTS ${_POSSIBLE_PATH}/${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}/CMakeLists.txt)
58                get_filename_component(FREERTOS_KERNEL_PATH ${_POSSIBLE_PATH} REALPATH)
59                message("Setting FREERTOS_KERNEL_PATH to '${FREERTOS_KERNEL_PATH}' found relative to enclosing project")
60                break()
61            endif()
62        endforeach()
63        if (FREERTOS_KERNEL_PATH)
64            break()
65        endif()
66    endif()
67
68    # user must have specified
69    if (FREERTOS_KERNEL_PATH)
70        if (EXISTS "${FREERTOS_KERNEL_PATH}/${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}")
71            break()
72        endif()
73    endif()
74endforeach ()
75
76if (NOT FREERTOS_KERNEL_PATH)
77    message(FATAL_ERROR "FreeRTOS location was not specified. Please set FREERTOS_KERNEL_PATH.")
78endif()
79
80set(FREERTOS_KERNEL_PATH "${FREERTOS_KERNEL_PATH}" CACHE PATH "Path to the FreeRTOS Kernel")
81
82get_filename_component(FREERTOS_KERNEL_PATH "${FREERTOS_KERNEL_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
83if (NOT EXISTS ${FREERTOS_KERNEL_PATH})
84    message(FATAL_ERROR "Directory '${FREERTOS_KERNEL_PATH}' not found")
85endif()
86if (NOT EXISTS ${FREERTOS_KERNEL_PATH}/${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}/CMakeLists.txt)
87    message(FATAL_ERROR "Directory '${FREERTOS_KERNEL_PATH}' does not contain a '${PICO_PLATFORM}' port here: ${FREERTOS_KERNEL_RP2040_RELATIVE_PATH}")
88endif()
89set(FREERTOS_KERNEL_PATH ${FREERTOS_KERNEL_PATH} CACHE PATH "Path to the FreeRTOS_KERNEL" FORCE)
90
91add_subdirectory(${FREERTOS_KERNEL_PATH}/${FREERTOS_KERNEL_RP2040_RELATIVE_PATH} FREERTOS_KERNEL)