>-- Original Message -- >From: "Mica Hallin" <[EMAIL PROTECTED]> >To: "Wolfgang Grandegger" <[EMAIL PROTECTED]> >Cc: "RTnet Users" <[EMAIL PROTECTED]> >Subject: RE: [RTnet-users] Re: >Date: Tue, 9 Mar 2004 10:56:27 +0100 > > > > >> -----Original Message----- >> From: Wolfgang Grandegger [mailto:[EMAIL PROTECTED] >> Sent: mardi 9 mars 2004 10:15 >> To: Jan Kiszka; Mica Hallin >> Cc: RTnet Users >> Subject: RE: [RTnet-users] Re: >> >> >> >-- Original Message -- >> >From: Jan Kiszka <[EMAIL PROTECTED]> >> >To: Mica Hallin <[EMAIL PROTECTED]> >> >CC: RTnet Users <[EMAIL PROTECTED]> >> >Subject: [RTnet-users] Re: >> >Date: Mon, 08 Mar 2004 19:15:01 +0100 >> > >> > >> >Hi, >> > >> >you accidentally posted to the admin address. >> > >> >> Hi, >> >> >> >> I must try RTnet perf on powerpc embeded system >> >> >> >> System config : >> >> >> >> MPC8245 >> >> EtherExpress 100 >> >> >> >> The system boot via NFS with bootp so I have to built-in >> ethernet driver >> >on >> >> kernel >> >> Well, are you sure about that. Likely the kernel boots out of >> flash memory or is downloaded via tftp. Then the kernel mounts >> the root file-system via NFS. > >the kernel is loaded from the flash memory and then it mount the the root >filesystem with NFS. > > >> >> > >> >Sounds tricky. >> > >> >> Can I try to boot with a initrd image and load the RT ethernet module >> and >> >> then boot via nfs ? or can I built-in RT ethernet into my kernel ? >> >> >> > >> >Even if you were able to built the RT-driver into your kernel, it would >> >> >not be usable as a normal NIC as long as the realtime network is not >> >running. A "realtime" boot over a RTnet segment would require >> >significant extensions to RTnet and RTAI (the latter would also be >> >required to become built-in). >> > >> >Do you have the chance to boot your system over Etherboot with TFTP and >> >> >then switch it over to a realtime network segment? This is how I bring >> >up my test boxes. >> >> See above. You should be able to install a RAMdisk based system >> (initrd) in the Flash memory or on a FLASH file-system (CRAMFS, >> JFSS2) and boot Linux without using the network. Nevertheless, >> working in such an environment is cubersome. >> >> Wolfgang. >> > >Yes I will try to put all I need to the initrd image and forget the server
The run-time environment is one issuse, the kernel another one. As I see it, you need to rebuild the kernel without the ethernet driver statically linked in and boot it via TFTP or from an updated flash image. Then you can load either the Linux or the RTnet ethernet driver when Linux is up and running. Good luck. Wolfgang. ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ RTnet-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/rtnet-users
