Step 1: Start L4Linux 2.6

We have to take some special care when loading L⁴Linux because this application has special memory requirements. There should be at least 16 MB of memory available (more memory is recommended, also it depends on whether you use a RAM disk or hard disk containing the root file system).

The example menu.lst entry below assumes GRUB loads the binaries via the network. The loader is configured to use the TFTP server as its file provider which in turn requires the ORe network switch to perform its duties.

 # menu.lst

 set ND       = "(nd)/tftpboot/drops"
 set BIN_PATH = "$(ND)/bin"

 title Fiasco + Loader + L4Linux
 kernel $(BIN_PATH)/bootstrap
 modaddr 0x02000000
 module $(BIN_PATH)/fiasco -nokdb -serial -serial_esc
 module $(BIN_PATH)/l4v2/sigma0
 module $(BIN_PATH)/l4v2/roottask
 module $(BIN_PATH)/l4v2/names
 module $(BIN_PATH)/l4v2/log
 module $(BIN_PATH)/l4v2/dm_phys
 module $(BIN_PATH)/l4v2/simple_ts
 module $(BIN_PATH)/l4v2/l4io
 module $(BIN_PATH)/l4v2/ore
 module $(BIN_PATH)/l4v2/l4dope --l4io
 module $(BIN_PATH)/l4v2/tftp --l4io --server=192.168.0.2
 module $(BIN_PATH)/l4v2/loader $(ND)/cfg/l4linux.conf
 vbeset 0x117

And here is the Loader config script for loading L⁴Linux assuming, that L⁴Linux starts in a RAM disk and is configured to use l4io (omega0 protocol) for requesting IRQs:

 # cfg/l4linux.conf

 verbose 0
 modpath "(nd)/tftpboot/drops/bin/l4v2"

 task "vmlinuz26" "mem=64M load_ramdisk=1 ramdisk_size=16384 root=/dev/ram l4env_rd=(nd)/tftpboot/drops/rd/drops-rd.rd"
     all_sects_writable

Note:

The vbeset command switches into graphic mode after loading all L4 boot modules.

L⁴Linux has to be compiled with the L⁴Linux option "Frame buffer driver for l4con and DOpE" (CONFIG_L4_FB_DRIVER=y).

The default file provider the loader communicates with is tftp. This server accepts filenames in the GRUB syntax. Therefore you must prepend "(nd)/". The binary must be accessible by the TFTP protocol (e.g. the binaries must be world-readable).

Step 2: Start the launchpad from L4Linux