Genesis2_pci_IRQ_map vs. MVME2300/MVME2600

Genesis2_pci_IRQ_map vs. MVME2300/MVME2600

[Fred Gray]

Dear PPC kernel hackers,

In the structure Genesis2_pci_IRQ_map in arch/ppc/platforms/prep_pci.c, the
following entries currently appear (at least in 2.4.21-pre6 from a
linuxppc_2_4_devel tree obtained via rsync):

       0,      /* Slot 10 - Ethernet */
       0,      /* Slot 11 - Universe PCI - VME Bridge */
       3,      /* Slot 12 - unused */
       0,      /* Slot 13 - unused */
       2,      /* Slot 14 - SCSI */

These numbers don't match with the Motorola MVME2300 and MVME2600 series boards
that I'm using, where the following assignments are the reality:

       0,      /* Slot 10 - unused */
       0,      /* Slot 11 - IDE */
       3,      /* Slot 12 - SCSI */
       5,      /* Slot 13 - Universe PCI - VME Bridge */
       2,      /* Slot 14 - Ethernet */

Note that nearly all of the differences here are in the comments: the kernel
works as distributed except that the Universe VME interface isn't assigned
an IRQ.  The fact that every single one of the comments is wrong just makes it
a little more interesting for someone like me to figure out what this
mapping refers to. :-)

Thanks very much,

-- Fred

-- Fred Gray / Visiting Postdoctoral Researcher                         --
-- Department of Physics / University of California, Berkeley           --
-- fegray@socrates.berkeley.edu / phone 510-642-4057 / fax 510-642-9811 --

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