buildroot to build toolchain on Linux

Hi,

I have build hardware for Stratix GX development board without any error, but now I have problem with building uCLinux kernel. When I try to generate system.h

# generate nios2_system.h from ptf
make ARCH=nios2nommu CROSS_COMPILE=nios2-linux-uclibc- hwselect SYSPTF=stratixGX.ptf

it detects that I have 0 bytes ddr_sdram

--- Please select a device to execute kernel from:
(1) ddr_sdram
       Class: ddr_sdram_component
       Size: 0 bytes

SOPC builder system consists of nios2 cpu, ddr sdram controller (Base address 0x00000000, end address 0x07ffffff == 128MB ??), uart, jtag uart, timer, sysid, avalon tri state bridge and dummy cfi flash (not connected to any fpga pin). Can anybody help me?

Here is my ptf file:

[attachment=162:attachment]

Best Regards,

Maciek