enable kdump capture kernel functionality

Hi,

I am trying to rebuild the kernel for one of our powerpc devices to include=
 kdump capture kernel functionality, but I'm having trouble getting it to l=
oad for use on panic.
I'm running Linux 3.14.60 on e500v2 (COMX-P2020 module).

I've tried following the documentation at https://www.kernel.org/doc/Docume=
ntation/kdump/kdump.txt:
CONFIG_KEXEC=3Dy
CONFIG_CRASH_DUMP=3Dy
CONFIG_NONSTATIC_KERNEL=3Dy
CONFIG_PROC_VMCORE=3Dy
CONFIG_RELOCATABLE=3Dy
CONFIG_RELOCATABLE_PPC32=3Dy

These are the parameters I'm using to boot the kernel:

cat /proc/cmdline

root=3D/dev/mmcblk0p2 rw rootdelay=3D15 ip=3D10.215.181.92::10.215.180.1:25=
5.255.254.0:XSTREAM-DEV2:eth0 loglevel=3D0 mfgstring=3D1:XF40-LB-SSSSSS-MMD=
DYY console=3DttyS0,115200 ramdisk_size=3D700000 cache-sram-size=3D0x10000 =
crashkernel=3D0x04000000@0x04000000 slub_debug=3DFPZ

Running the following command:

kexec -l /boot/uImage -t uImage-ppc --dtb=3D/boot/comx.dtb --initrd=3D/bo=

ot/initramfs_data.cpio --command-line=3D"root=3D/dev/mmcblk0p2 3 maxcpus=3D=
1 irqpoll noirqdistrib reset_devices rw rootdelay=3D15 ip=3D10.215.181.92::=
10.215.180.1:255.255.254.0:XSTREAM-DEV2:eth0 loglevel=3D0 mfgstring=3D1:XF4=
0-LB-SSSSSS-MMDDYY console=3DttyS0,115200 ramdisk_size=3D700000 cache-sram-=
size=3D0x10000"
Returns:
Can't add kernel to addr 0x00000000 len 0
Cannot load /boot/uImage

I'm not sure what mechanism is used to load the kernel and where this can b=
e configured. I assumed that the crashkernel parameter from the cmdline is =
the actual setting.
Where should I set this value? Also, how can I ensure that the two kernel i=
mages don't overlap?

Thanks in advance,
Cosmin