Forcing 8259A for one irq.

Forcing 8259A for one irq.

[Zwane Mwaikambo]

I've got a strange scenario whereupon i have a box with IO-APIC enabled
(SMP box) and a driver which seems not to be SMP safe and only works if i
boot the kernel with noapic. My question is, which is the cleanest way of
making a specific IRQ use the 8259 instead of IOAPIC? (kind of like the
timer on some boxes).

I've looked at the enable_8259A_irq function, but my method looks terribly
incorrect (and untested too). Would this method work? And is there
anything i should look out for?

irq_num = IRQ below 15 (specified as parameter to module)
add entry to IO-APIC routing table? (local-apic to CPU#0)
enable_8259A_irq(irq_num)

This is only a temporary measure until i get the driver completely SMP
safe and i want to avoid running noapic.

Thanks in advance,
	Zwane Mwaikambo

--
Anyone for a LUG in Swaziland?

error in cache-counting, or so

[Paul P Komkoff Jr]

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Hash: RIPEMD160

[stingray stingray]$ uname -a
Linux kg 2.4.13-ac5 #1 SMP Thu Nov 1 23:50:07 MSK 2001 i686 unknown
[stingray stingray]$ cat /proc/meminfo
        total:    used:    free:  shared: buffers:  cached:
Mem:  129765376 23408640 106356736        0  9134080 18446744073706065920
Swap: 148013056        0 148013056
MemTotal:       126724 kB
MemFree:        103864 kB
MemShared:           0 kB
Buffers:          8920 kB
Cached:       4294963892 kB
SwapCached:          0 kB
Active:          14144 kB
Inact_dirty:       292 kB
Inact_clean:         0 kB
Inact_target:    26212 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       126724 kB
LowFree:        103864 kB
SwapTotal:      144544 kB
SwapFree:       144544 kB

need anything else ? .config etc. can be sent by req :)))
- -- 
Paul P 'Stingray' Komkoff 'Greatest' Jr // (icq)23200764 // (irc)Spacebar
  PPKJ1-RIPE // (smtp)i@stingr.net // (http)stingr.net // (pgp)0xA4B4ECA4
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