mw [-bwldx] REGION DATA...
Write DATA value(s) to the specified REGION.
byte access
word access (16 bit)
long access (32 bit)
quad access (64 bit)
write file (default /dev/mem)
swap bytes
3.8.8. mm - memory modify with mask
3.9.1. bcb - writes a i.MX23/28 BCB data structure to flash