Xilinx Virtex4 FX PPC
rwoodworth at securics.com
Tue Aug 21 02:00:54 EST 2007
I'm beginning development with a Xilinx PPC/FPGA. I've now gotten my
feet wet and have a few successes and a few head scratches.
I have a Xilinx ML403 dev board. I ran the Monta-Vista Linux 2.4 demo.
Now for my own attempt.
(Please reply if anything I'm doing is incorrect)
I found a pre-built toolchain for my i686 Debian host with
gcc-4.1.1 + glibc6. I downloaded kernel 2.6.23-rc3 after reading
several posts on this list about the ML403 and drivers in this kernel
Problem 1: The kernel did not have the correct memory information. I
noticed in 'embed_config.c' that the board params are hard coded,
however my kernel was not linking with that version of embed_config().
It was linking with embed_config() in 'misc-embedded.c'
Did I miss a config parameter in the kernel config??
My kernel now boots and mounts the MontaVista rootfs on the SystemACE
Problem 2: Build my own rootfs.
If I try to build my own programs (busybox and bash at this point) with
shared libc using the same glibc from my toolchain, I get an "Illegal
instruction" error. Is my glibc not compatible with my Xilinx PPC 405??
If I try to build a rootfs with debian ppc packages I have the same
"Illegal instruction" error.
Do I need a special glibc for the Xilinx PPC 405????
Does a normal PPC glibc have more "advanced" instructions compiled in
that will not work on a Xilinx PPC 405??
Is it true that the xparameters.h file produced by Xilinx EDK is not
compatible with the current 2.6.23 kernel?? It appears that if I change
params (addresses or IRQ's) in my Xilinx EDK I need to hand edit the
xparameters.h in the kernel source tree. True?
BTW: My Xilinx EDK is version 9.1i with full ISE 9.1i.
I'm looking forward to helping the Linux on Xilinx PPC effort!!
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