lzma

[Ronald G Minnich]

I just booted into an lzma-compressed payload.

It freed up some memory ...
[rminnich at q buildrom]$ make
Cleaning up shared libraries...
Building the initrd...
Building the uncompressed ELF payload...
Compressing the ELF payload with lzma...
Bytes left in ROM: 218117
Building linuxbios...


is that 200K? so it would seem ...

[rminnich at q ~]$ ls -l /tmp/olpcpayload.elf
-rw-rw-r--  1 rminnich rminnich 666619 Sep 14 10:41 /tmp/olpcpayload.elf
[rminnich at q ~]$


I am attaching my diffs to git.

You probably don't want that verbose, but could we, pretty please :-) 
leave the console at tty0? :-)

Here's what you change in linuxbios to test this.

[rminnich at q LinuxBIOSv2]$ svn diff
Index: targets/olpc/rev_a/Config.SPI.lb
===================================================================
--- targets/olpc/rev_a/Config.SPI.lb    (revision 2414)
+++ targets/olpc/rev_a/Config.SPI.lb    (working copy)
@@ -5,8 +5,8 @@

  # Don't let LinuxBIOS compress the payload
  #option CONFIG_COMPRESSED_ROM_STREAM_NRV2B=0
-#option CONFIG_COMPRESSED_ROM_STREAM_LZMA=1
-#option CONFIG_PRECOMPRESSED_ROM_STREAM=0
+option CONFIG_COMPRESSED_ROM_STREAM_LZMA=1
+option CONFIG_PRECOMPRESSED_ROM_STREAM=1

  # leave 64k for vsa and 64k for EC code
  option ROM_SIZE=(1024*1024)-(64*1024)-(64*1024)


many thanks to Carl-Daniel for his fine work. Carl-Daniel, your lzma 
stuff worked first time!

The lzma, and my  mods to linuxbios for it, seem to have worked so well 
that I keep going back to history to see if I really did use the lzma, 
but I think I did. Somebody else try this and see if I'm dreaming.
thanks
ron
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