[U-Boot-Users] PPCBoot vxworks question

Chris Hallinan clh at net1plus.com
Fri Jan 10 19:18:45 CET 2003

Well, I don't know what the VxWorks bootloader does, but I know
PPCBoot/U-Boot.  In order to get any of the boot[x] commands to
work, it assumes you have the kernel image loaded into memory
already.  For example, to load and execute the Linux kernel, here is
one method assuming you have a properly functioning Ethernet i/f and
a tftpserver.

tftpboot 400000 linux-ppcboot-image
bootm 400000

The first line loads the kernel image into memory at my chosen
address of 0x40_0000 and the second line transfers control to it.

The other thing you must do for this to work is to put the PPCBoot /
U-Boot header on your kernel image using the mkimage utility that
comes with U-Boot.  The README file in U-Boot distribution contains
this info and much more!

-Chris Hallinan
DS4.COM, Inc

> -----Original Message-----
> From: u-boot-users-admin at lists.sourceforge.net
> [mailto:u-boot-users-admin at lists.sourceforge.net]On
> Behalf Of Timothy
> Canham
> Sent: Friday, January 10, 2003 12:40 PM
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] PPCBoot vxworks question
> I am new to the list and new to PPCBoot/UBoot, so
> apologies in advance
> if this is old territory. I am trying to load a vxworks
> kernel located
> on an external server, using the typical vxworks boot
> loader. i.e., the
> vxworks boot loader loads a kernel from a remote server
> using rsh and
> jumps to it. From what I can see, PPCBoot has the bootvx
> command, but it
> appears to require that the vxworks kernel already be
> loaded to work.
> Can someone post the equivalent procedure to duplicate in
> PPCBoot what
> the vxworks boot loader does?
> --
> -------
> Timothy K. Canham
> Isaiah 26:3
> tim at timcanham.com
> http://www.timcanham.com
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