sysbuild: Add updateable application type

Add a new external application type that will be configured in a way to
produce signed update candidate.

Ref: NCSDK-33316

Signed-off-by: Tomasz Chyrowicz <[email protected]>

Author: tomchy

share/sysbuild/cmake/modules/sysbuild_extensions.cmake

@@ -204,19 +204,21 @@ endfunction()
 # BOARD <board>:             Use <board> for application build instead user defined BOARD.
 # BOARD_REVISION <revision>: Use <revision> of <board> for application (only valid if
 #                            <board> is also supplied).
-# APP_TYPE <MAIN|BOOTLOADER>: Application type.
+# APP_TYPE <MAIN|BOOTLOADER|UPDATEABLE>: Application type.
 #                             MAIN indicates this application is the main application
 #                             and where user defined settings should be passed on as-is
 #                             except for multi image build flags.
 #                             For example, -DCONF_FILES=<files> will be passed on to the
 #                             MAIN_APP unmodified.
 #                             BOOTLOADER indicates this app is a bootloader
+#                             UPDATEABLE indicates this app is updateable and the bootloader
+#                             settings should be passed on.
 # BUILD_ONLY <bool>:          Mark the application as build-only. If <bool> evaluates to
 #                             true, then this application will be excluded from flashing
 #                             and debugging.
 #
 function(ExternalZephyrProject_Add)
-  set(app_types MAIN BOOTLOADER FIRMWARE_LOADER)
+  set(app_types MAIN BOOTLOADER FIRMWARE_LOADER UPDATEABLE)
   cmake_parse_arguments(ZBUILD "" "APPLICATION;BOARD;BOARD_REVISION;SOURCE_DIR;APP_TYPE;BUILD_ONLY" "" ${ARGN})
 
   if(ZBUILD_UNPARSED_ARGUMENTS)

share/sysbuild/image_configurations/UPDATEABLE_image_default.cmake

@@ -0,0 +1,43 @@
+# Copyright (c) 2024 Nordic Semiconductor
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# This sysbuild CMake file sets the sysbuild controlled settings as properties
+# on all images.
+
+set_config_bool(${ZCMAKE_APPLICATION} CONFIG_BOOTLOADER_MCUBOOT "${SB_CONFIG_BOOTLOADER_MCUBOOT}")
+set_config_string(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_SIGNATURE_KEY_FILE
+                  "${SB_CONFIG_BOOT_SIGNATURE_KEY_FILE}"
+)
+set_config_string(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_ENCRYPTION_KEY_FILE
+                  "${SB_CONFIG_BOOT_ENCRYPTION_KEY_FILE}"
+)
+
+if(SB_CONFIG_BOOTLOADER_MCUBOOT)
+  if("${SB_CONFIG_SIGNATURE_TYPE}" STREQUAL "NONE")
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_GENERATE_UNSIGNED_IMAGE y)
+  else()
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_GENERATE_UNSIGNED_IMAGE n)
+  endif()
+
+  if(SB_CONFIG_MCUBOOT_MODE_SINGLE_APP)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_SINGLE_APP y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_SWAP_WITHOUT_SCRATCH)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_SWAP_WITHOUT_SCRATCH y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_SWAP_SCRATCH)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_SWAP_SCRATCH y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_OVERWRITE_ONLY)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_OVERWRITE_ONLY y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_DIRECT_XIP y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP_WITH_REVERT)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_DIRECT_XIP_WITH_REVERT y)
+  elseif(SB_CONFIG_MCUBOOT_MODE_RAM_LOAD)
+    # RAM load mode requires XIP be disabled and flash size be set to 0
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_RAM_LOAD y)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_XIP n)
+    set_config_int(${ZCMAKE_APPLICATION} CONFIG_FLASH_SIZE 0)
+  elseif(SB_CONFIG_MCUBOOT_MODE_FIRMWARE_UPDATER)
+    set_config_bool(${ZCMAKE_APPLICATION} CONFIG_MCUBOOT_BOOTLOADER_MODE_FIRMWARE_UPDATER y)
+  endif()
+endif()