Comtrol eCos - Manual (Page 153)

fis free
Name
fis free — Free flash image
Synopsis
fis free
Description
This command shows which areas of the flash memory are currently not in use. When a block contains non-erased
contents it is considered in use. Since it is possible to force an image to be loaded at a particular flash location, this
command can be used to check whether that location is in use by any other image.
Note: There is currently no cross-checking between actual flash contents and the FIS directory, which mans
that there could be a segment of flash which is not erased that does not correspond to a named image, or
vice-versa.
Examples
Show free flash areas.
RedBoot> fis free
0xA0040000 .. 0xA07C0000
0xA0840000 .. 0xA0FC0000
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