[LinuxBIOS] Missing IRQ table entries; irq_tables.c problem?

Jonathan Sturges jonathansturges at yahoo.com
Mon Sep 17 03:56:55 CEST 2007

Thanks Uwe,
That was it!  I added 'option IRQ_SLOT_COUNT=3' to the Config.lb in the target directory of my board, and that did the trick.  I now get IRQs assigned to all 3 devices I intended to.  Very nice!

As a side note, I noticed that only 2 boards came with IRQ_SLOT_COUNT in their Config.lb's.  Was this option recently made mandatory?  If so, we need a sweep to update the LBv2 Config.lb files.


----- Original Message ----
From: Uwe Hermann <uwe at hermann-uwe.de>
To: Jonathan Sturges <jonathansturges at yahoo.com>
Cc: LinuxBIOS mailing list <linuxbios at linuxbios.org>
Sent: Sunday, September 16, 2007 5:31:13 PM
Subject: Re: [LinuxBIOS] Missing IRQ table entries; irq_tables.c problem?

On Sun, Sep 16, 2007 at 12:31:09PM -0700, Jonathan Sturges wrote:
> Hi,
> I'm missing something obvious and need someone to point me in the right direction.
> I'm finishing up mapping IRQs on a CS5530 winterminal board I've got.  I know the IRQ mappings of each on-board device and slot, and I put together my irq_tables.c accordingly.  However, only the first 2 entries get written to the IRQ table, even though the file designates 3.  Then, when I boot the LB image, I get this warning:
> Inconsistent IRQ routing table size (0x40/0x50)
> The 0x50 makes sense; that's the "32+16*3" from my irq_tables.c.  But where is the size being set to 0x40?  It seems there's a configuration I missed somewhere.


  default IRQ_SLOT_COUNT=2

(or similar) in the Options.lb of your board.

> const struct irq_routing_table intel_irq_routing_table = {
>     PIRQ_SIGNATURE,  /* u32 signature */
>     PIRQ_VERSION,    /* u16 version   */
>     32+16*3,     /* there can be total 3 devices on the bus */

So this should be


This may or may not fix your issue. Please report back if it does.

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