On 9/11/20 1:47 PM, Andrii Voloshyn wrote: > Hi there, > > What are the ways of copying whole FIT image form NOR flash to RAM by > specifying flash offset without any extra bytes. > I've seen quite a lot of times when kernel image size has a fixed value (as > an uboot environment variable), which is greater than the actual kernel size. > Problem with that that we copy from flash whatever is after kernel which is > not required, and there is a potential problem when kernel gets bigger at some > point than the fixed size specified in the variable mentioned above. > As FIT file has all required info about size, is there a command to copy > it to RAM from flash? > > Thank you > > Cheers, > Andy >
Yes... but only for NAND flash... I am also interested in booting from NOR flash, so I was looking around and noticed that the function nand_load_image used by the nboot command contains no nand-specific functionality. Although it calls nand_read_skip_bad, that in turn only call simple wrappers around generic mtd functions. The only nan-specific part is the check against unknown command suffixes, which is easily moved to do_nandboot. In terms of things already supported by U-Boot, you could format your flash device with UBIFS, and then use ubifsmount/ubifsload/bootm to boot. --Sean
