New submission from Simon 'corecode' Schubert <corec...@fs.ei.tum.de>:
It seems that many systems come with a broken MPtable. For instance my machine
at work misses an entry for bus 4 (where my NIC is on), but instead contains an
entry for the non-existing bus 253.
One possible heuristic would be to assume that if there is one bus not mentioned
in the MPtable, but also one bus of the MPtable not existing in the system, that
this bus entry in the MPtable actually corresponds to the missing entry. I am
not sure how good this might work though.
Alternatively, pci-pci bridges to buses which are not mentioned in the MPtable
could be treated as pci-pci bridges on physical slots, i.e. we could assume
intline round-robin.
----------
files: mptable.txt
messages: 6096
nosy: corecode
status: unread
title: need interrupt routing fallback/heuristic for broken MPtable
_____________________________________________________
DragonFly issue tracker <b...@lists.dragonflybsd.org>
<http://bugs.dragonflybsd.org/issue1268>
_____________________________________________________
===============================================================================
MPTable, version 2.0.15
-------------------------------------------------------------------------------
MP Floating Pointer Structure:
location: BIOS
physical address: 0x000fe710
signature: '_MP_'
length: 16 bytes
version: 1.4
checksum: 0x91
mode: Virtual Wire
-------------------------------------------------------------------------------
MP Config Table Header:
physical address: 0x000f0000
signature: 'PCMP'
base table length: 772
version: 1.4
checksum: 0xbf
OEM ID: 'DELL '
Product ID: 'WS T3400 '
OEM table pointer: 0x00000000
OEM table size: 0
entry count: 85
local APIC address: 0xfee00000
extended table length: 0
extended table checksum: 0
-------------------------------------------------------------------------------
MP Config Base Table Entries:
--
Processors: APIC ID Version State Family Model Step Flags
0 0x14 BSP, usable 6 7 10
0xbfebfbff
1 0x14 AP, usable 6 7 10
0xbfebfbff
2 0x14 AP, usable 6 7 10
0xbfebfbff
3 0x14 AP, usable 6 7 10
0xbfebfbff
--
Bus: Bus ID Type
0 PCI
1 PCI
2 PCI
3 PCI
4 PCI
5 PCI
6 ISA
--
I/O APICs: APIC ID Version State Address
8 0x20 usable 0xfec00000
--
I/O Ints: Type Polarity Trigger Bus ID IRQ APIC ID PIN#
ExtINT active-hi edge 6 0 8 0
INT conforms conforms 6 1 8 1
INT conforms conforms 6 0 8 2
INT conforms conforms 6 3 8 3
INT conforms conforms 6 4 8 4
INT conforms conforms 6 5 8 5
INT conforms conforms 6 6 8 6
INT conforms conforms 6 7 8 7
INT conforms conforms 6 8 8 8
INT conforms conforms 6 9 8 9
INT conforms conforms 6 10 8 10
INT conforms conforms 6 11 8 11
INT conforms conforms 6 12 8 12
INT conforms conforms 6 14 8 14
INT conforms conforms 6 15 8 15
INT conforms conforms 0 1:A 8 16
INT conforms conforms 0 1:B 8 17
INT conforms conforms 0 1:C 8 18
INT conforms conforms 0 1:D 8 19
INT conforms conforms 0 6:A 8 16
INT conforms conforms 0 6:B 8 17
INT conforms conforms 0 6:C 8 18
INT conforms conforms 0 6:D 8 19
INT conforms conforms 3 0:A 8 16
INT conforms conforms 3 0:B 8 17
INT conforms conforms 3 0:C 8 18
INT conforms conforms 3 0:D 8 19
INT conforms conforms 0 26:A 8 16
INT conforms conforms 0 26:B 8 17
INT conforms conforms 0 26:C 8 22
INT conforms conforms 0 26:D 8 19
INT conforms conforms 0 27:A 8 16
INT conforms conforms 0 28:A 8 16
INT conforms conforms 0 28:B 8 17
INT conforms conforms 0 28:C 8 18
INT conforms conforms 0 28:D 8 19
INT conforms conforms 0 29:A 8 23
INT conforms conforms 0 29:B 8 17
INT conforms conforms 0 29:C 8 18
INT conforms conforms 0 29:D 8 19
INT conforms conforms 0 31:A 8 16
INT conforms conforms 0 31:B 8 17
INT conforms conforms 0 31:C 8 20
INT conforms conforms 1 0:A 8 16
INT conforms conforms 1 0:B 8 17
INT conforms conforms 1 0:C 8 18
INT conforms conforms 1 0:D 8 19
INT conforms conforms 253 0 8 17
INT conforms conforms 253 1 8 18
INT conforms conforms 253 2 8 19
INT conforms conforms 253 3 8 16
INT conforms conforms 3 0:A 8 16
INT conforms conforms 3 0:B 8 17
INT conforms conforms 3 0:C 8 18
INT conforms conforms 3 0:D 8 19
INT conforms conforms 5 3:A 8 19
INT conforms conforms 5 3:B 8 16
INT conforms conforms 5 3:C 8 17
INT conforms conforms 5 3:D 8 18
INT conforms conforms 5 0:A 8 16
INT conforms conforms 5 0:B 8 17
INT conforms conforms 5 0:C 8 18
INT conforms conforms 5 0:D 8 19
INT conforms conforms 5 4:A 8 16
INT conforms conforms 5 4:B 8 17
INT conforms conforms 5 4:C 8 18
INT conforms conforms 5 4:D 8 19
INT conforms conforms 5 5:A 8 17
INT conforms conforms 5 5:B 8 18
INT conforms conforms 5 5:C 8 19
INT conforms conforms 5 5:D 8 16
--
Local Ints: Type Polarity Trigger Bus ID IRQ APIC ID PIN#
ExtINT active-hi edge 6 0 255 0
NMI active-hi edge 6 0 255 1
===============================================================================
