Exception at interrupt level VxWorks5.5 MPC880

I am using MPC880 and vxworks5.5..
When i try to boot vxworks image from the flash, its giving the following error message and tries to reboot continuously.

Exception at interrupt level:

Implementation Dependent Instruction TLB Error
Exception current instruction address: 0x07200000
Machine Status Register: 0x10009030
Condition Register: 0x20000040
Regs at 0xe109c8

Exception at interrupt level:

data access
Exception current instruction address: 0x00021ef0
Machine Status Register: 0x00001030
Data Access Register: 0xffffffff
Condition Register: 0x40000085
Data storage interrupt Register: 0x000003eb
Regs at 0xe10818

Can anyone tell me what may be the reason for this?

Thank you.
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