Hi, all

         I meet a very difficult problem about ppc linux run on MPC5200. my linux version is 2.4.18.

         When i run my application for some time, the linux operation system will reset to jump to the uboot and restart linux,. When it happen, I can capture  hreset and sreset signal using oscillograph. Additional, when linux reset , it have two results: one is enter machine check exception and some debug information is outputted, the other is nothing is to be outputted. The debug information is following:

Machine check in kernel mode.

Caused by (from SRR1=41030): Transfer error ack signal

Oops: machine check, sig: 7

NIP: C009E934 XER: 00000000 LR: C009E924 SP: C014F1E0 REGS: c014f130 TRAP: 0200    Not tainted

MSR: 00041030 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11

TASK = c014d480[0] 'swapper' Last syscall: 120

last math c3c30000 last altivec 00000000

GPR00: 00000001 C014F1E0 C014D480 00000083 00009032 00000000 00000000 00000010

GPR08: 00000000 40000000 00000000 00000000 C3E5E9E4 1010D5DC 03FCA000 007FFF6C

GPR16: 00000000 00000001 007FFF00 03FC4660 00001032 0014F350 00000000 C0176314

GPR24: C0176314 00000000 00000000 0000076C C0160000 F0000D8C 00000070 C3E5E960

Call backtrace:

C3E5EA68 C009F030 C001D9A4 C0019430 C00192BC C0018F80 C00057C0

C0003E40 C0005544 C0005558 C0003918 C0164590 000035F0

MPC5xxx_FEC_IEVENT_RFIFO_ERROR

Kernel panic: Aiee, killing interrupt handler!

In interrupt handler - not syncing

Can you help me ? I will waiting for your answer , thanks anyway.