Romboot problem

[yah]

Hi,
  I'm trying to boot Linux from my custom board (MCP750).I compiled the kernel using zimage.initrd. And it can boot correctly via net. But when I fill it in the onboard flash, the system can't boot. Here are the boot trace.

ROMBoot about to Begin... Press <ESC> to Bypass, <SPC> to Continue
loaded at:     00005400 0001A224
relocated to:  00800000 00814E24
board data at: 07F88000 07F8EA0C
relocated to:  0080E318 00814D24
zimage at:     00010400 000D4EA0
relocated to:  00815000 008D9AA0
initrd at:     000D4EA0 00372F92
relocated to:  008DA000 00B780F2
avail ram:     00400000 00800000

Linux/PPC load: root=/dev/ram0 init=/bin/bash
Uncompressing Linux...done.
Now booting the kernel

Exception: Program (Illegal Instruction)
SRR0 =001AFB5C SRR1 =00080040 Vector-Offset =00700
IP     =001AFB5C MSR    =00000040 CR     =20000008 FPSCR  =00000000
R0     =0000044B R1     =0080E210 R2     =0080AE54 R3     =0080E318
R4     =008DA000 R5     =00B780F2 R6     =00814D24 R7     =00814D41
R8     =00000000 R9     =00000000 R10    =DEADC0DE R11    =00810000
R12    =00000001 R13    =00000000 R14    =00005400 R15    =00000000
R16    =00000000 R17    =00000000 R18    =00000000 R19    =00000000
R20    =00000000 R21    =00000000 R22    =00000000 R23    =00000000
R24    =00000000 R25    =00000000 R26    =00000000 R27    =00814D41
R28    =00814D24 R29    =00B780F2 R30    =008DA000 R31    =0080E318
SPR0   =7C651B78 SPR1   =20000000 SPR8   =00000028 SPR9   =00000000
001AFB5C E5E9AD38  WORD        $E5E9AD38

  What's wrong?
  Thanks for any advice.

Regards,
Amy

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