uClinux boot problem on Cyclone IV

Hi everyone,

I am a newbie of uClinux. My PC environment is CentOs 5.5 + nios2gcc-20080203.tar.bz2 + nios2-linux-20100621.tar.

I want to download uclinux to my custom board, whose FPGA is EP4C30. And the ptf file is generated in Quartus10.1.

I carefully follow the steps of the wiki:

make menuconfig (default)

make hwselect

make

nios2-configure-sof

nios2-download -g

nios2-terminal

However, the system always halts after the sentence, "Uncompressing Linux... Ok, booting the kernel.".

I have changed the ".ptf" file to ".ptf.pre_generation_ptf" file, the performance is the same.

Then I changed to download uclinux to another custom board. Whose FPGA is EP3C40, and the ptf file is generated in Quartus8.1.

I followed the same steps, but it works well.

I am a little puzzled. Because the sopc configuration is almost the same. I also note the irq 0.

I don't know whether nios2-linux-20100621.tar supports Cyclone4. I need your help.

Thank you.

Derek