The Concurrent VP32x/02x VME CPUs boot via PXE. To get this working you have to enable booting via PXE in the BIOS of the CPU. Additionally, one should enable the Serial-Console for the BIOS, to enable remote control.

Syslinux

The one needs SYSLINUX, available at http://syslinux.zytor.com/index.php

Download the tar-ball at: http://www.kernel.org/pub/linux/utils/boot/syslinux/

The tftpserver has to support the tsize command. The standard tftpd on Debian does not! tftpd-hpa does!

Unpack and put the pxelinux.0 in your tftp-directory.

Then make a new directory: pxelinux.cfg

This should look like this:

lxhadesdaq:/tftpboot# ls -R /tftpboot/
/tftpboot/:
pxelinux.0  pxelinux.cfg

/tftpboot/pxelinux.cfg:
8CB54E8A  default  display.msg  memtest.bin vmlinuz-2.6.8-1-686-smp

8CB54E8A is the config file for the Ethernet-address, it (or default) looks like this:

## lxhadesdaq.gsi.de       A       140.181.75.158
##
serial 0 115200 0x003
default linux5
timeout 10
prompt 1
display display.msg

label linux
        kernel vmlinuz_2.6.12.2_2005_07_14
        append root=/dev/nfs rw ip=dhcp mem=400M console=ttyS0,115200

label linux5
        kernel vmlinuz_2.6.12.2_2005_07_20cct
        append root=/dev/nfs rw ip=dhcp mem=400M console=ttyS0,115200

dhcpserver

The dhcp-server config has the following important settings:

option domain-name "gsi.de";
option domain-name-servers lxdns1.gsi.de, lxdns2.gsi.de;

option subnet-mask 255.255.192.0;
option broadcast-address 140.181.127.255;
option routers 140.181.96.1;

...
...

<

host hadc01 {
   hardware ethernet 00:40:9E:00:85:04;
   fixed-address hadc01.gsi.de;
   server-name "lxhadesdaq.gsi.de";
%RED%
   next-server lxhadesdaq.gsi.de;
#### this option is needed for new dhcp-servers 
%ENDCOLOR

   filename "pxelinux.0";
   option root-path "/var/diskless/linuxvme/hadc01";

}

kernel

compiling is done on lxhadesdaq with: make menuconfig make INSTALL_MOD_PATH=xxxxx make modules_install

---

Remove all unnecessary stuff from the config.

• Enable IP autoconfiguration in

Location

│ -> Device Drivers -> Networking support -> Networking support (NET [=y]) -> Networking options -> TCP/IP networking (INET [=y])

• After that enable Root over NFS in the Filesystems->NetworkFilesystems part

The standard kernel-.config did not work. The insmod vmedriver.ko always failed with:
"Jul 19 14:27:48 hadc01 kernel: Failed to re-map Universe device to Kernel space"

What helped was to use the .config from ConcurrentTechnologies. It is attached.

VME-driver

can be found in:

hadaq@lxhadesdaq:/var/diskless/linuxvme/home/hadaq/soft/cct_1.23.01

Probelms

• Multiprocess is not working with the Sharc Boards
• I assume that VME-mapping is either not working over large spaces (0x1000000) or, that PCI-maps should not be allowed to overlap. The MU-programming does not work if PCI-mapping is very large
• the kernel needs the mem=xxxM append statement. Otherwise the insmode vmedriver resMemSize=32MB doesn't work!

-- MichaelTraxler - 14 Jul 2005

• config_2.6.22.1_concurrent: for the new VME-CPU