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i.MX28: Get Boot Mode from ROM loader

Question asked by Jörg Krause on Mar 26, 2015
Latest reply on Apr 1, 2015 by igorpadykov



I want to read from the second stage bootloader which boot mode the ROM loader used to boot the device, especially to distinguish if it was booted by USB recovery or NAND boot mode. Reading the Boot Mode Pads is not reliable since the Boot Mode Pads can be already released (eg, BM2 to force from NAND to USB recovery mode) when the bootloader reads the pin values (high or low).


Is there any register, I didn't find one in the manual, which holds the boot mode at power-up? Or is there any other way to obtain the boot mode at power-up state?



Jörg Krause