Re: WARNING: unexpected IO-APIC, please mail to linux-smp@vger.kernel.org

["Randy.Dunlap" <rddunlap@osdl.org>]

On Mon, 26 May 2003 23:03:46 -0700 (PDT) "Randy.Dunlap" <rddunlap@osdl.org> wrote:

| > Good morning,
| >
| > I think you might be interested in this log.
| >
| > My hardware:
| > - - - - - - -
| > Motherboard: Abit IC7
| > Chipset: Intel 82875P (MCH) + 82801EB (ICH5R)
| > Memory: 2 x DDR400 256MB CAS 2.5 (Dual DDR Mode Enabled)
| > CPU: 1 x Pentium-4 2.4Ghz 800Mhz PSB
| >
| > Please send me a mail if you need more information.
| >
| > /Mattias
| >
| >
| > --------
| > BOOT LOG
| > --------
| > ---snip---
| > ENABLING IO-APIC IRQs
| > Setting 2 in the phys_id_present_map
| > ...changing IO-APIC physical APIC ID to 2 ... ok.
| > init IO_APIC IRQs
| >  IO-APIC (apicid-pin) 2-0, 2-5, 2-9, 2-10, 2-11, 2-22 not connected.
| > ..TIMER: vector=0x31 pin1=2 pin2=0
| > number of MP IRQ sources: 24.
| > number of IO-APIC #2 registers: 24.
| > testing the IO APIC.......................
| >
| > IO APIC #2......
| > .... register #00: 02000000
| > .......    : physical APIC id: 02
| > .... register #01: 00178020
| > .......     : max redirection entries: 0017
| > .......     : PRQ implemented: 1
| > .......     : IO APIC version: 0020
| > .... register #02: 00178020
| > .......     : arbitration: 00
| >  WARNING: unexpected IO-APIC, please mail
| >           to linux-smp@vger.kernel.org
| > .... IRQ redirection table:
| 
| That looks odd to me.  Reg. 01 and Reg. 02 are both 00178020 ?????
| I'll look into it tomorrow (my time) unless someone else does or already
| knows about this.

The Intel 82801EB (ICH5) datasheet does not specify that this chipset
has a register 2 for the IO APIC.  We need to find a way to recognize
this and ignore reg. 02 (a way other than register 1's IO APIC
version value, which is currently being used).

I'm still looking into this.

--
~Randy