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Altera_Forum's avatar
Altera_Forum
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21 years ago

How do I rebuild the ramfs.img file?

I am doing this development using a cyclone board with a custom FPGA configuration. With this build the kernel and ROM file system seem to work fine but I have no access to the ram file system. I ass...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Hello HalfDome,

If you're talking about Linux the procedure is something like this:

dd from /dev/zero to /dev/ram0

mke2fs on /dev/ram0

tune2fs on /dev/ram0

dd from /dev/ram0 to ramfs.img

run 'holes' on ramfs.img (this last step is required so that the reverse 'expand' command works)

I think the ramfs.img that is included with distribution is a couple of years old so I'll run through the procedure today and elaborate a bit on the above steps. If you have access to a Linux Host workstation, check out /usr/src/linux/Documentation/ramdisk.txt (i think) -- there should be some overlap.

mike