Bring back improvements for devices without erase #2216
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The commit adds two MCUboot configuration options: - MCUBOOT_SUPPORT_DEV_WITHOUT_ERASE - MCUBOOT_SUPPORT_DEV_WITH_ERASE - MCUBOOT_MINIMAL_SCRAMBLE The first one should be enabled to support devices that do not require erase. When such devices are used in system then MCUboot will avoid erasing such device, which is not needed by hardware, and will just write data to it. This allows to both improve device lifetime and reduce time of operations like swap. The second option is just bringing a configuration option for already existing support for deviceses with erase. The third option allows to reduce amount of removed data. When enabled, MCUboot will remove enough of data, depending on the purpose of the removal, to just fulfill the purpose; for example if removal of data is done to make image unrecognizable for MCUboot, with this option, it will only remove header. Signed-off-by: Dominik Ermel <[email protected]>
Add Kconfig options:
- CONFIG_MCUBOOT_STORAGE_WITHOUT_ERASE that enables MCUboot
configuration MCUBOOT_SUPPORT_DEV_WITHOUT_ERASE
- CONFIG_MCUBOOT_STORAGE_WITH_ERASE that enables MCUboot
configuration MCUBOOT_SUPPORT_DEV_WITH_ERASE
- CONFIG_MCUBOOT_STORAGE_MINIMAL_SCRAMBLE that enables MCUboot
configuration MCUBOOT_MINIMAL_SCRAMBLE
Adds implementation of flash_area_erase_required, which is required when
MCUBOOT_STORAGE_DEV_WITHOUT_ERASE is enabled.
Signed-off-by: Dominik Ermel <[email protected]>
The intention of bs_custom_storage_erase is to remove data from device; to support devices that do not require erase, without calling erase, so that devices that do not implement such functions could work, the flash_area_erase has been replaced with flash_area_flatten. Signed-off-by: Dominik Ermel <[email protected]>
By default enable all other systems to work with devices that require erase prior to write. Signed-off-by: Dominik Ermel <[email protected]>
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This brings back #2114
which has been reverted after problems with TF-M have been triggered on Zephyr CI.