Flash backup with OpenOCD

Hi,

I have a board with 4 flash memory (22MB NOR and 264MB NAND).

Can I save/backup the memories to files with OpenOCD (I think yes but I can’t find/see that in the documentations)?

If yes, how?

If not, which is that software which can do this?

Every note will helpful… (where should I search)

Thanks,

Balázs