DO NOT MERGE, DO NOT REVIEW - WIP, experiments

samples/zephyr/hello_world_mini_boot/CMakeLists.txt

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2025 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(hello_world_mini_boot)
+
+target_sources(app PRIVATE ${ZEPHYR_BASE}/samples/subsys/mgmt/mcumgr/smp_svr/src/main.c)

samples/zephyr/hello_world_mini_boot/VERSION

@@ -0,0 +1,5 @@
+VERSION_MAJOR = 1
+VERSION_MINOR = 0
+PATCHLEVEL = 0
+VERSION_TWEAK = 0
+EXTRAVERSION = dev

samples/zephyr/hello_world_mini_boot/prj.conf

@@ -0,0 +1,49 @@
+# NOTE: Copied from smp_svr_mini_boot
+
+# Enable MCUmgr and dependencies.
+CONFIG_NET_BUF=y
+CONFIG_ZCBOR=y
+CONFIG_CRC=y
+CONFIG_MCUMGR=y
+CONFIG_STREAM_FLASH=y
+CONFIG_FLASH_MAP=y
+
+# Some command handlers require a large stack.
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2304
+CONFIG_MAIN_STACK_SIZE=2176
+
+# Ensure an MCUboot-compatible binary is generated.
+CONFIG_BOOTLOADER_MCUBOOT=y
+
+# Enable flash operations.
+CONFIG_FLASH=y
+
+# Enable most core commands.
+CONFIG_IMG_MANAGER=y
+CONFIG_MCUMGR_GRP_IMG=y
+CONFIG_MCUMGR_GRP_OS=y
+CONFIG_MCUMGR_GRP_STAT=y
+
+# Enable logging
+CONFIG_LOG=y
+CONFIG_MCUBOOT_UTIL_LOG_LEVEL_WRN=y
+
+# Disable debug logging
+CONFIG_LOG_MAX_LEVEL=3
+
+# Enable the Shell mcumgr transport.
+CONFIG_BASE64=y
+CONFIG_CRC=y
+CONFIG_SHELL=y
+CONFIG_SHELL_BACKEND_SERIAL=y
+CONFIG_MCUMGR_TRANSPORT_SHELL=y
+
+CONFIG_MCUMGR_TRANSPORT_NETBUF_SIZE=1220
+CONFIG_MCUMGR_GRP_OS_MCUMGR_PARAMS=y
+CONFIG_MCUMGR_TRANSPORT_WORKQUEUE_STACK_SIZE=4608
+
+# Disable shell commands that are not needed
+CONFIG_CLOCK_CONTROL_NRF_SHELL=n
+CONFIG_DEVICE_SHELL=n
+CONFIG_DEVMEM_SHELL=n
+CONFIG_FLASH_SHELL=n

samples/zephyr/hello_world_mini_boot/sysbuild.conf

@@ -0,0 +1,4 @@
+# Enable MCUboot bootloader support
+SB_CONFIG_BOOTLOADER_MCUBOOT=y
+SB_CONFIG_BOOT_SIGNATURE_TYPE_ECDSA_P256=y
+SB_CONFIG_MCUBOOT_MODE_DIRECT_XIP=y

samples/zephyr/hello_world_mini_boot/sysbuild/mcuboot/prj.conf

@@ -0,0 +1,62 @@
+# INFO: Config below from mcuboot's prj.conf
+
+CONFIG_MAIN_STACK_SIZE=10240
+
+CONFIG_FLASH=y
+
+# TODO: Uncomment to enable mcuboot logs
+# CONFIG_LOG=y
+# CONFIG_LOG_MODE_MINIMAL=y
+# CONFIG_LOG_DEFAULT_LEVEL=0
+# CONFIG_MCUBOOT_LOG_LEVEL_DBG=y
+# TODO: Comment-out to enable mcuboot logs (increases footprint by ~ 1KiB)
+CONFIG_SERIAL=n
+CONFIG_CONSOLE=n
+CONFIG_UART_CONSOLE=n
+
+# INFO: Config below from mcuboot's soc/nrf54l05_cpuapp.conf
+
+CONFIG_SPI_NOR=n
+
+CONFIG_BOOT_WATCHDOG_FEED=n
+
+# Ensure the fastest RRAM write operations
+#  NOTE: Default value is 1.
+#  Setting it to 32 increases binary size by 8B.
+#  According to the comment above, RRAM write speed might decrease without it.
+# CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=32
+
+
+# INFO: Section below is from smp_svr_mini_boot
+
+# NOTE: No direct impact on binary size, as the option is set to y anyway.
+# However considering the purpose of the minimal config, it might be worth to set it explicitly.
+CONFIG_SIZE_OPTIMIZATIONS=y
+
+CONFIG_BOOT_BANNER=n
+CONFIG_NCS_BOOT_BANNER=n
+CONFIG_PRINTK=n
+CONFIG_GPIO=n
+
+# WARN: Using this prevents app showing logs but saves 0.1 KiB of flash
+# NOTE: When logs are disabled, uncommenting this has no influence on size and app logs correctly
+# CONFIG_NRF_GRTC_START_SYSCOUNTER=n
+
+CONFIG_MINIMAL_LIBC=y
+CONFIG_LTO=y
+CONFIG_ISR_TABLES_LOCAL_DECLARATION=y
+
+# INFO: Configs below were originally in boards/nrf54l15dk_nrf54l05_cpuapp.conf
+# Moved here for simpler structure, as the sample is intended only for l05 for now.
+
+CONFIG_SYS_CLOCK_EXISTS=n
+CONFIG_NRF_GRTC_TIMER=n
+
+CONFIG_PSA_CRYPTO_DRIVER_CRACEN=n
+CONFIG_PSA_CRYPTO_DRIVER_OBERON=n
+
+CONFIG_NRF_OBERON=y
+CONFIG_BOOT_ECDSA_NRF_OBERON_EXPERIMENT=y
+
+# NOTE: Needed for direct-xip
+CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x7000

west.yml

@@ -126,7 +126,7 @@ manifest:
           compare-by-default: true
     - name: mcuboot
       repo-path: sdk-mcuboot
-      revision: 459288d6a13cede9fa09e314b21a979a6cc6e3f2
+      revision: pull/559/head
       path: bootloader/mcuboot
     - name: qcbor
       url: https://github.com/laurencelundblade/QCBOR