1. Home
  2. Embedded Programming
  3. newbie help: MPC8260 kernel panic

newbie help: MPC8260 kernel panic

Hi all and sorry in advance for my questions. I'd like to submit you a problem I'm working on since a week. During the boot the linux kernel hangs because of a kernel panic. The errors showed are:

... Machine check in kernel mode Caused by (from SRR1=41000): Transfer error ack signal Oops: machine check, sig: 7 [...] Kernel panic: Attempted to kill init! Rebooting in 180 seconds..

It seems to me this happends in do_initcalls() function, but I'm not able to understand exaclty what causes this problem and what's the possible solution. In the net I found someone had the same problem on the same board, but there was no posted a solution :( Any help or idea?

Thanks in advance

Reply to
EKP
Loading thread data ...

SIGBUS 7 BUS error (4.2 BSD) You could have a non responding peripheral.

Save/Restore Register 1 (SRR1) Y Holds copy of Machine State Register (MSR) just prior to exception

The MSR is the main control register for the processor. it controls:

- the privilege level the processor is operating in (user/supervisor)

- whether interrupts are enabled/disabled

- whether instruction/data accesses can be translated through their MMUs

- tracing capabilities on a per-instruction or per-branch instruction level

Try to determine from the content of SRR1 the context of the processor at the time of exception

Try do disable as many drivers as you can until it works. Then add them one by one to find the culprit.

Reply to
Lanarcam

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.