Sparc32 SMP fix

[Blue Swirl]

Hi,

This patch fixes SMP booting:
Entering SMP Mode...
Starting CPU 1 at f01e46e4
Calibrating delay loop... 180.63 BogoMIPS
Starting CPU 2 at f01e46f0
Calibrating delay loop... 181.86 BogoMIPS
Starting CPU 3 at f01e46fc
Calibrating delay loop... 182.68 BogoMIPS
Total of 4 Processors activated (721.71 BogoMIPS).

Though depending on version Linux usually hangs later.

Please apply.

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[Stefan Reinauer]

* Blue Swirl  [060905 20:48]:
> This patch fixes SMP booting:
> Entering SMP Mode...
> Starting CPU 1 at f01e46e4
> Calibrating delay loop... 180.63 BogoMIPS
> Starting CPU 2 at f01e46f0
> Calibrating delay loop... 181.86 BogoMIPS
> Starting CPU 3 at f01e46fc
> Calibrating delay loop... 182.68 BogoMIPS
> Total of 4 Processors activated (721.71 BogoMIPS).
>
> Though depending on version Linux usually hangs later.
>
> Please apply.

Thank you very much. Applied. Where does it hang now?

Stefan

[Blue Swirl]

> Thank you very much. Applied. Where does it hang now?

Linux version 2.4.27-2-sparc32-smp (root@gimli) (gcc version 3.3.5 (Debian 
1:3.3.5-13)) #1 SMP Mon Aug 22 14:41:42 UTC 2005
...
devfs: boot_options: 0x0
pty: 256 Unix98 ptys configured
Floppy drive(s): fd0 is 1.44M
ioremap: done with statics, switching to malloc
[hangs]

Linux version 2.2.19-6.2.16smp ([e-mail]) (gcc version 
egcs-
2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 SMP Wed Mar 13 08:48:37 EST 
2002
...
IPVS: Connection hash table configured (size=4096, memory=32Kbytes)
Linux IP multicast router 0.06 plus PIM-SM
Initializing RT netlink socket
Starting kswapd v 1.5
[hangs]

Linux version 2.2.17-14smp ([e-mail]) (gcc version 
egcs-2.91.6
6 19990314/Linux (egcs-1.1.2 release)) #1 SMP Mon Feb 5 17:50:05 EST 2001
...
IPVS: Connection hash table configured (size=4096, memory=32Kbytes)
Linux IP multicast router 0.06 plus PIM-SM
Initializing RT netlink socket
Starting kswapd v 1.5
[hangs]

And finally 'vmlinuz-smp-2.0.35-13', I can't remember where this was:
[sparc] Kernel already loaded
PROMLIB: obio_ranges 1
poke_swift: swift_is_tsparc=0
root child is ffd46a48
Found CPU 0 <node=ffd4ffb4,mid=0>
Found CPU 1 <node=ffd502f8,mid=1>
[hangs, doesn't start the other cpu]

The problem could be in Qemu's interrupt controller emulation (inter-CPU 
interrupts not working) or serial port (2.2 series get to userland with 
graphical console).

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