Wolfgang Grandegger wrote:

Pieter wrote:
  

quoted

Hi all

I have inherited  a cusom MPC 8548 board and am currently in the
processes of porting to U-Boot 2008 and Linux 2.6.27. The board worked
using U-boot 1.2 and linux 2.6.24 not using FDT.

I have completed the U-boot source and am able to boot up to the point
where control is handed to Linux kernel , where the board hangs. This
lead me to believe that my device tree source is not accurate.

    ## Transferring control to Linux (at address 00000000) ...
       Booting using OF flat tree...

I assembled a minimal "equus.dts"  by using the tqm8458.dts and
sbc8548.dts as examples and the "Booting the Linux/ppc kernel without
Open Firmware" document supplied with Lnux 2.6.27. I am uncertain about
assigning interrupts to the variouse nodes.

I compiled the blob using dtc Version: 1.1.0:
dtc -b 0 -V 17 -p 0x2000 -I dts -R 8 -O dtb -f
arch/powerpc/boot/dts/equus.dts > SDH0/tftp/equus.dtb

can anyone please help? My device tree source is as follows:

<snip>

Does this address match the one set by U-Boot? Also check all other
addresses for PCI, etc.

Wolfgang.

I have checked and confirmed that the addresses do match those in
U-Boot. I have also confirmed that the chosen node gets created and
values that set by U-boot does indeed get set. The boot posses gets
stuck when control is handed to Linux. ( the Linux has been compiled
with ARCH=powerpc ).

I have tried to do the post mortem debug as looking at log_buf in
memory, but the memory is still empty. Where should i focus my
debugging, on linux, u-boot or FDT side?

any other help would be appreciated. thanks pieter