embedded OpenBSD, have initrd equivalent?

[Jonathan Walther <djw@lineo.com>]

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emBSD isn't quite right for what I'm doing myself.  I have
8M flash, and 16M ram to play with.  Do we support
flash?  If not, I suppose a low level block device
driver for it might suffice.

Now, flash tends to fail, due to the properties of
erase blocks and whatnot.  Linux has initial ram
disks; does OpenBSD have anything similar?  I've
seen an option for MFS, but not MFS_ROOT here.
I've seen RAMDISK_* options, but no real explanation
of how to use them, even in the source that implements
the ramdisk.

How can I tell the kernel to fetch some blocks, load them
into ram, then use that as the root filesystem, at boot
time?  This is real flash btw; no IDE interface.  Has 2
ethernet cards and 2 serial ports built in; low power
consuption AMD K5 cpu, and so forth.  Oh, and a sweet
little 3DES chip built in for crypto.

Jonathan

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