Commit 7361d3d7 authored by Carles Cufi's avatar Carles Cufi Committed by Anas Nashif
Browse files

config: bootloader: Add support for MCUboot 



Add a new Kconfig option, BOOTLOADER_MCUBOOT, that automatically sets
the required options necessary to make the resulting image bootable by
the MCUboot open source bootloader. This includes the text section
offset and the vector relay table for Cortex-M0, and in the future it
might also add the DTS overlay required to link at slot0 offset in
flash.

Signed-off-by: default avatarCarles Cufi <carles.cufi@nordicsemi.no>
parent b8173d96

arch/arm/core/cortex_m/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -194,6 +194,7 @@ config SW_VECTOR_RELAY 
	bool

	prompt "Enable Cortex-M0 Vector Table soft relay"

	default n

	default y if BOOTLOADER_MCUBOOT

	depends on CPU_CORTEX_M0 && !CPU_CORTEX_M0_HAS_VECTOR_TABLE_REMAP

	help

	  Add Cortex-M0 Vector Table relay handler and relay vector table, to

misc/Kconfig

+19 −2
Original line number Diff line number Diff line
@@ -44,9 +44,16 @@ endif 
config TEXT_SECTION_OFFSET

	hex "TEXT section offset"

	default 0

	default 0x200 if BOOTLOADER_MCUBOOT

	help

	  This sets and offset before the text section and allows booting images

	  with custom headers that are inserted at the beginning of the image.

	  If the application is built for chain-loading by a bootloader this

	  variable is required to be set to value that leaves sufficient

	  space between the beginning of the image and the start of the .text

	  section to store an image header or any other metadata.

	  In the particular case of the MCUboot bootloader this reserves enough

	  space to store the image header, which should also meet vector table

	  alignment requirements on most ARM targets, although some targets

	  may require smaller or larger values.



config HAVE_CUSTOM_LINKER_SCRIPT

	prompt "Custom linker scripts provided"
@@ -273,6 +280,16 @@ config BOOTLOADER_SRAM_SIZE 
	  This option specifies the amount of SRAM (measure in kB) reserved for

	  when Zephyr is to act as a bootloader.



config BOOTLOADER_MCUBOOT

	bool

	prompt "MCUboot bootloader support"

	default n

	help

	  This option signifies that the target uses MCUboot as a bootloader,

	  or in other words that the image is to be chain-loaded by MCUboot.

	  This sets several required options in order for the image generated

	  to be bootable using the MCUboot open source bootloader.



config BOOTLOADER_KEXEC

	bool

	prompt "Boot using Linux kexec() system call"

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