I am running a 750 with a 8260 as slave. Since I get heaps of spurious
interrupts I started digging into it. The old thread "8260 - Spurious
interrupt when calling __sti()" and the latest code didn't help but this
does:
- A sync instruction last in m8260_mask_irq and m8260_mask_and_ack in
ppc8260_pic.c.
I guess you need to let the write to SIMR make it before enabling
external interrupts in the 750 (603). This is probably due to our use of
8260 as a slave processor but I think it makes sense anyway.
Note that this problem is not related to the fact that I am running the
new ATM driver, this also happens as indicated in the old mail thread
with serial and Ethernet interrupts only.
Thanks,
Hans
P.S. Tack Magnus!
without sync:
==============
bash-2.04# cat /proc/interrupts
CPU0
4: 9777 8260 SIU Edge uart
5: 0 8260 SIU Edge uart
32: 1396813673 8260 SIU Edge atm
33: 57596 8260 SIU Edge fenet
41: 0 8260 SIU Edge uart
42: 0 8260 SIU Edge uart
60: 11 8260 SIU Edge ide0
BAD: 1396813185
with sync:
===========
bash-2.04# cat /proc/interrupts
CPU0
4: 4709 8260 SIU Edge uart
5: 0 8260 SIU Edge uart
32: 217671 8260 SIU Edge atm
33: 10395 8260 SIU Edge fenet
41: 0 8260 SIU Edge uart
42: 0 8260 SIU Edge uart
60: 11 8260 SIU Edge ide0
BAD: 0
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