df662c30e4
SB key is left readable, the corresponding bit in RD_DIS is unset. We set write-protection for RD_DIS to ensure that the SB key is always readable.
Bootloader Support Component ============================ Overview -------- "Bootloader support" contains APIs which are used by the bootloader but are also needed for the main app. Code in this component needs to be aware of being executed in a bootloader environment (no RTOS available, BOOTLOADER_BUILD macro set) or in an esp-idf app environment (RTOS running, need locking support.)