Re: How to port ppc-linux to new custom boards? (virtexII)

Hi,

Where did you download the Montavista 2_4_devel?

via anonymous rsync from montavista server. i followed the instructions at
http://penguinppc.org/dev/kernel.shtml

quoted

1) Is there any comprehensive documentation / tutorial on how to port
the ppc-linux to new machines? Where does my board specific fixup
stuff go (for example, memory and IRQ declarations and such).

See the following two valuable docs:
http://www.denx.de/twiki/bin/view/PPCEmbedded/Introduction
http://www.denx.de/twiki/bin/view/DULG/Manual

Unfortunately, neither of these docs talks about tailoring the kernel to
custom hardware. They only state that "some changes" have to be applied to
the startup code. I need some more specific information, because I'm not a
expert PPC guru.

quoted

vmlinux file and write it to flash directly, because zImage on powerpc
lacks decompressor code (at least with my configuration). But the
1.3meg vmlinux file makes for pretty long turnaround times (I can only
upload at 115k at the moment).

AFAIK, the key point of decompressing is boot loader
itself. It has NOTHING to do with ppc linux. Both
U-Boot and PlanetCore can do this job well.

this means that i also have to port u-boot and use 2 bootloaders in
sequence, or port u-boot's decompressor code to our own bootloader. Sigh.

Arm Linux provides a self-decompressing zImage. I thought it could be
possible to configure the ppc kernel just like that.

Thanx anyway,
Patrick


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