how do I use RamDiskDxe?

[Rick Warner <rick@microway.com>]

Hi All,

I'm trying to develop a tool for automated BIOS flashing from the EFI 
shell using IPMI serial over lan to drive it.  To accomplish this, my 
plan is to use a network booted EFI shell with a tftp client and a 
ramdisk to download the flash tools and ROM into as a workspace and then 
run the flash commands from that ram disk.

I've been able to successfully build and boot an efi shell from the edk 
2 sources including the tftp client.  I've also been able to separately 
build the RamDiskDxe driver from the MdeModulePkg. Loading the 
RamDiskDxe.efi driver file results in a successful message, but I do not 
get any usable ram disk made available to me?

How do I get a usable drive letter/name (ie blk0: or any other name) 
from the RamDiskDxe driver?

Once I've done that, will it be possible to include the RamDiskDxe 
driver as part of the network bootable efi shell image?  I assume I'll 
need to modify the .dsc file for the ShellPkg to include the 
MdeModulePkg pieces.

If anyone has any other suggestions for this, I'm open to ideas. The 
only way I've been successful in network booting EFI shell is using just 
that file directly.  I tried creating a dos filesystem image with the 
efi shell file in it just like would work with a USB key, but that would 
not boot over the network stack. If there is some way of creating a 
network bootable EFI shell filesystem image (similar to how Linux can 
network boot a separate vmlinuz kernel and initrd image)?

Are there any docs that I've missed (I've tried looking in the user docs 
and on the wiki) regarding setting up RamDiskDxe?

Thanks!
Rick Warner