AW: TQM860L hangs after soft reboot

Hi Jens-Peter,

linuxppc-embedded-bounces@ozlabs.org wrote on Donnerstag, 13. Januar
2005 13:37:=20

Hi all,
We've designed a custom board for an TQM860L module from
TQ-Components.=20
Now the following behaviour occurs:
After a soft reset (from linux or bootloader u-boot) the board hangs.
Only a hard reset (power cycle or RESIN# pin low of TQ-Modul) wakes
it up.

RESIN# is routed to pin PORESET# of the CPU (with some reset logic in =
between).

In the evaluation board STK8xxL from TQ the modul boots normally
after a soft reset. I assume it might be a forgotten pullup- or pull
down in our custom board.

Try a look at the user manual: MPC860UM 3/2003, REV 2, Table 11-1.MPC860 =

Reset Responses and the following chapter.

By the way, how does linux handle a soft reset?

U-Boot uses the checkstop reset (caused by a machine check after=20
trying to execute an instruciton at a non-existing address).

Hope this was somewhat of a help.

Regards,
Martin