freertos: Update components CMakeLists.txt and Add SMP Kconfig option

This commit does the following:

- Add a Kconfig option to select between the IDF FreeRTOS kernel and the
  FreeRTOS SMP kernel.
- Updates the freertos component's CMakeLists.txt so that FreeRTOS SMP
  files are now built based the the new configuration option.

This commit WILL NOT compile. The port files for FreeRTOS SMP still need to
be updated.

components/freertos/CMakeLists.txt

@@ -6,66 +6,111 @@ endif()
 
 idf_build_get_property(target IDF_TARGET)
 
-if(CONFIG_IDF_TARGET_ARCH_XTENSA)
-    set(srcs
-        "FreeRTOS-Kernel/portable/xtensa/port.c"
-        "FreeRTOS-Kernel/portable/xtensa/portasm.S"
-        "FreeRTOS-Kernel/portable/xtensa/xtensa_context.S"
-        "FreeRTOS-Kernel/portable/xtensa/xtensa_init.c"
-        "FreeRTOS-Kernel/portable/xtensa/xtensa_overlay_os_hook.c"
-        "FreeRTOS-Kernel/portable/xtensa/xtensa_vector_defaults.S"
-        "FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S")
-
-    set(include_dirs
-        FreeRTOS-Kernel/include
-        esp_additions/include/freertos              # For files with #include "FreeRTOSConfig.h"
-        FreeRTOS-Kernel/portable/xtensa/include     # For arch-specific FreeRTOSConfig_arch.h in portable/<arch>/include
-        esp_additions/include)                      # For files with #include "freertos/FreeRTOSConfig.h"
-
-    set(private_include_dirs
-        FreeRTOS-Kernel/portable/xtensa/include/freertos
-        FreeRTOS-Kernel/portable/xtensa
-        FreeRTOS-Kernel/portable/priv_include
-        .)
-
-elseif(CONFIG_IDF_TARGET_ARCH_RISCV)
-    set(srcs
-        "FreeRTOS-Kernel/portable/riscv/port.c"
-        "FreeRTOS-Kernel/portable/riscv/portasm.S")
-
-    set(include_dirs
-        FreeRTOS-Kernel/include
-        esp_additions/include/freertos              # For files with #include "FreeRTOSConfig.h"
-        FreeRTOS-Kernel/portable/riscv/include      # For arch-specific FreeRTOSConfig_arch.h in portable/<arch>/include
-        esp_additions/include)                      # For files with #include "freertos/FreeRTOSConfig.h"
-
-    set(private_include_dirs
-        FreeRTOS-Kernel/portable/riscv/include/freertos
-        FreeRTOS-Kernel/portable/riscv
-        FreeRTOS-Kernel/portable/priv_include
-        .)
-
-endif()
-
-list(APPEND srcs
-    "esp_additions/task_snapshot.c"
-    "FreeRTOS-Kernel/portable/port_common.c"
-    "FreeRTOS-Kernel/portable/port_systick.c"
-    "FreeRTOS-Kernel/croutine.c"
-    "FreeRTOS-Kernel/event_groups.c"
-    "FreeRTOS-Kernel/list.c"
-    "FreeRTOS-Kernel/queue.c"
-    "FreeRTOS-Kernel/tasks.c"
-    "FreeRTOS-Kernel/timers.c"
-    "FreeRTOS-Kernel/stream_buffer.c"
-    "FreeRTOS-openocd.c"
-    "esp_additions/freertos_v8_compat.c")
-
-list(APPEND private_include_dirs
-    "FreeRTOS-Kernel/include/freertos")
-
-if(CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY)
-    list(APPEND srcs "FreeRTOS-Kernel/portable/xtensa/xtensa_loadstore_handler.S")
+if(CONFIG_FREERTOS_SMP)
+    if(CONFIG_IDF_TARGET_ARCH_XTENSA)
+        set(srcs
+            "FreeRTOS-Kernel-SMP/portable/xtensa/port.c"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/portasm.S"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_context.S"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_init.c"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_overlay_os_hook.c"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_vector_defaults.S"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_vectors.S")
+
+        set(include_dirs
+            "FreeRTOS-Kernel-SMP/include" # FreeRTOS headers via #include "freertos/xxx.h"
+            "esp_additions/include/freertos" # For config via #include "FreeRTOSConfig.h"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/include" # Xtensa/Arch Config headers via #include "freertos/xxx.h"
+            "esp_additions/include" # For #include "freertos/task_snapshot.h" and #include "freertos/FreeRTOSConfig.h"
+            "FreeRTOS-Kernel-SMP/portable/xtensa/include/freertos") # Xtensa headers via #include "xxx.h"
+
+        set(private_include_dirs
+            "FreeRTOS-Kernel-SMP/portable/xtensa/include/freertos"
+            "FreeRTOS-Kernel-SMP/portable/xtensa"
+            .)
+    endif()
+
+    list(APPEND srcs
+        "esp_additions/task_snapshot.c"
+        "FreeRTOS-Kernel-SMP/croutine.c"
+        "FreeRTOS-Kernel-SMP/event_groups.c"
+        "FreeRTOS-Kernel-SMP/list.c"
+        "FreeRTOS-Kernel-SMP/queue.c"
+        "FreeRTOS-Kernel-SMP/tasks.c"
+        "FreeRTOS-Kernel-SMP/timers.c"
+        "FreeRTOS-Kernel-SMP/stream_buffer.c"
+        "FreeRTOS-openocd.c"
+        )
+
+    list(APPEND private_include_dirs
+        "FreeRTOS-Kernel-SMP/include/freertos")  # FreeRTOS headers via #include "xxx.h"
+
+    if(CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY)
+        list(APPEND srcs "FreeRTOS-Kernel-SMP/portable/xtensa/xtensa_loadstore_handler.S")
+    endif()
+
+else()
+    if(CONFIG_IDF_TARGET_ARCH_XTENSA)
+        set(srcs
+            "FreeRTOS-Kernel/portable/xtensa/port.c"
+            "FreeRTOS-Kernel/portable/xtensa/portasm.S"
+            "FreeRTOS-Kernel/portable/xtensa/xtensa_context.S"
+            "FreeRTOS-Kernel/portable/xtensa/xtensa_init.c"
+            "FreeRTOS-Kernel/portable/xtensa/xtensa_overlay_os_hook.c"
+            "FreeRTOS-Kernel/portable/xtensa/xtensa_vector_defaults.S"
+            "FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S")
+
+        set(include_dirs
+            FreeRTOS-Kernel/include
+            esp_additions/include/freertos          # For files with #include "FreeRTOSConfig.h"
+            FreeRTOS-Kernel/portable/xtensa/include # For arch-specific FreeRTOSConfig_arch.h in portable/<arch>/include
+            esp_additions/include)                  # For files with #include "freertos/FreeRTOSConfig.h"
+
+        set(private_include_dirs
+            FreeRTOS-Kernel/portable/xtensa/include/freertos
+            FreeRTOS-Kernel/portable/xtensa
+            FreeRTOS-Kernel/portable/priv_include
+            .)
+
+    elseif(CONFIG_IDF_TARGET_ARCH_RISCV)
+        set(srcs
+            "FreeRTOS-Kernel/portable/riscv/port.c"
+            "FreeRTOS-Kernel/portable/riscv/portasm.S")
+
+        set(include_dirs
+            FreeRTOS-Kernel/include
+            esp_additions/include/freertos          # For files with #include "FreeRTOSConfig.h"
+            FreeRTOS-Kernel/portable/riscv/include  # For arch-specific FreeRTOSConfig_arch.h in portable/<arch>/include
+            esp_additions/include)                  # For files with #include "freertos/FreeRTOSConfig.h"
+
+        set(private_include_dirs
+            FreeRTOS-Kernel/portable/riscv/include/freertos
+            FreeRTOS-Kernel/portable/riscv
+            FreeRTOS-Kernel/portable/priv_include
+            .)
+
+    endif()
+
+    list(APPEND srcs
+        "esp_additions/task_snapshot.c"
+        "FreeRTOS-Kernel/portable/port_common.c"
+        "FreeRTOS-Kernel/portable/port_systick.c"
+        "FreeRTOS-Kernel/croutine.c"
+        "FreeRTOS-Kernel/event_groups.c"
+        "FreeRTOS-Kernel/list.c"
+        "FreeRTOS-Kernel/queue.c"
+        "FreeRTOS-Kernel/tasks.c"
+        "FreeRTOS-Kernel/timers.c"
+        "FreeRTOS-Kernel/stream_buffer.c"
+        "FreeRTOS-openocd.c"
+        "esp_additions/freertos_v8_compat.c")
+
+    list(APPEND private_include_dirs
+        "FreeRTOS-Kernel/include/freertos")
+
+    if(CONFIG_ESP32_IRAM_AS_8BIT_ACCESSIBLE_MEMORY)
+        list(APPEND srcs "FreeRTOS-Kernel/portable/xtensa/xtensa_loadstore_handler.S")
+    endif()
 endif()
 
 # esp_timer is required by FreeRTOS when we use esp_timer_get_time() to do profiling
@@ -114,3 +159,8 @@ elseif(CONFIG_APPTRACE_ENABLE)
     # this should be resolved when link-time registration of startup functions is added.
     idf_component_optional_requires(PRIVATE app_trace)
 endif()
+
+if(CONFIG_ESP_SYSTEM_GDBSTUB_RUNTIME)
+    # [refactor-todo]: port.c esp_startup_start_app_common() calls esp_gdbstub_init()
+    idf_component_optional_requires(PRIVATE esp_gdbstub)
+endif()

components/freertos/Kconfig

@@ -1,5 +1,13 @@
 menu "FreeRTOS"
 
+    config FREERTOS_SMP
+        bool "Run the SMP FreeRTOS kernel instead (FEATURE UNDER DEVELOPMENT)"
+        depends on IDF_TARGET_ESP32
+        default  "n"
+        help
+            This will cause the FreeRTOS component to compile with the SMP FreeRTOS kernel instead.
+            THIS FEATURE IS UNDER ACTIVE DEVELOPMENT, users use this at their own risk.
+
     config FREERTOS_UNICORE
         bool "Run FreeRTOS only on first core"
         default "y" if IDF_TARGET_ESP32S2

tools/ci/check_public_headers_exceptions.txt

@@ -6,8 +6,11 @@ components/xtensa/esp32/include/xtensa/config/
 
 components/newlib/platform_include/
 
+components/freertos/esp_additions/include/freertos_tasks_c_additions.h
 components/freertos/FreeRTOS-Kernel/include/freertos/
 components/freertos/FreeRTOS-Kernel/portable/xtensa/include/freertos/
+components/freertos/FreeRTOS-Kernel-SMP/include/freertos/
+components/freertos/FreeRTOS-Kernel-SMP/portable/xtensa/include/freertos/
 
 
 components/log/include/esp_log_internal.h