I've very recently received an updated MMU toolchain from Xilinx (thanks
Vasanth), which I've uploaded to the following URL:
http://developer.petalogix.com/downloads/microblaze-mmu-tools.tar.gz
It's about a 100Mb tarball, with build scripts and a README.
The only snag is a problem in newlib/libgloss/microblaze/Makefile.in
(no space between do\ and $(INSTALL_PROGRAM) causing
"do/usr/bin/install" error. Patch for the patch is below (ugly, I
know, the space should be in "do\", but patches seem to be
applied in order, so it's not easy to fix without regenerating them
all).