[nrf noup] mgmt/mcumgr: Bootutil hooks to handle image-1

The commit adds bootutil hook, for nrf5340, to allow it
handling the non-accessible image-1/primary slot.

Signed-off-by: Andrzej Głąbek <[email protected]>
Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>
Signed-off-by: Johann Fischer <[email protected]>
Signed-off-by: Dominik Ermel <[email protected]>
(cherry picked from commit 041e804)

Author: de-nordic

subsys/mgmt/mcumgr/CMakeLists.txt

@@ -16,3 +16,11 @@ add_subdirectory(transport)
 add_subdirectory_ifdef(CONFIG_SMP_CLIENT    smp_client)
 
 zephyr_library_link_libraries(mgmt_mcumgr)
+
+if (CONFIG_BOOT_IMAGE_ACCESS_HOOKS)
+    zephyr_include_directories(
+        ${ZEPHYR_MCUBOOT_MODULE_DIR}/boot/bootutil/include
+        ${ZEPHYR_MCUBOOT_MODULE_DIR}/boot/zephyr/include
+    )
+    zephyr_library_sources(bootutil_hooks/nrf53_hooks.c)
+endif()

subsys/mgmt/mcumgr/Kconfig

@@ -6,6 +6,7 @@ menuconfig MCUMGR
 	bool "mcumgr Support"
 	depends on NET_BUF
 	depends on ZCBOR
+	imply BOOT_IMAGE_ACCESS_HOOKS if (SOC_NRF5340_CPUAPP_QKAA && MCUMGR_GRP_IMG)
 	help
 	  This option enables the mcumgr management library.
 

subsys/mgmt/mcumgr/bootutil_hooks/nrf53_hooks.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/device.h>
+#include "bootutil/bootutil_public.h"
+
+int boot_read_swap_state_primary_slot_hook(int image_index,
+		struct boot_swap_state *state)
+{
+	if (image_index == 1) {
+		/* Pretend that primary slot of image 1 unpopulated */
+		state->magic = BOOT_MAGIC_UNSET;
+		state->swap_type = BOOT_SWAP_TYPE_NONE;
+		state->image_num = image_index;
+		state->copy_done = BOOT_FLAG_UNSET;
+		state->image_ok = BOOT_FLAG_UNSET;
+
+		/* Prevent bootutil from trying to obtain true info */
+		return 0;
+	}
+
+	return BOOT_HOOK_REGULAR;
+}