problem to load uImage but not zImage (on virtex-4 base board)

hi,

I'm trying to port Linux 2.6 on Avnet FX12 MM board with U-Boot and the help of xilinx ML403 config.

I have generate my costum xparameters.h file with EDK 8.2i.
I use ELDK 4.1 and Linux 2.6.20.x.
I have modified ml403.h u-boot's config file to adapt it for my board and I have no problem to boot u-boot.
I use the right board_info structure from <asm/ppcboot.h> and not the one in xilinx_ml403.h.

When I load the zImage directly with xilinx xmd debugger, the kernel start without problem (if I don't have KGDB or SERIAL_TEXT_DEBUG option in my kernel config). But when I try to load the uImage with u-boot, the kernel start but crach befor I can see something on output.
The kernel start because I debug it and the platform_init is ok, setup_arch too and it crach after ppc4xx_setup_arch at printk(KERN_INFO "Xilinx ML403 Reference System (Virtex-4 FX)\n") line when the kernel access in printk.c.

I use the opb_uart16550 IP in my Xilinx design and the associat drivers in u-boot and linux.

I'm new in linux embedded and I'm in internship...I have any idea where and what is the problem, certanly in the serial int I guest but I'm not sure.

Thanks and sorry for my english I'm fench.
Guillaume Berthelom

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