> Hi everyone!
>
> I am having some problems to get APIC to work. My system is running linux
> kernel v2.4.19 compiled for uniprocessor with APIC enabled. The CPU is AMD
> XP 1600+ and motherboard MSI with north bridge KT133A, and south bridge
> VT82C686B). On VIA's web site, they show APIC integrated in the south
> bridge. My BIOS offeres two features:
> - Use APIC - this is enabled
> - MPS version control for OS - this is set to 1.1, but it should not
> effect in any way, since this is a uniprocessor sistem, right?
>
> The system boots just fine, but I have same IRQs that are shared among
> devices. Here is the /proc/interrupts
> CPU0
> 0: 25475 IO-APIC-edge timer
> 1: 3 IO-APIC-edge keyboard
> 2: 0 XT-PIC cascade
> 8: 1 IO-APIC-edge rtc
> 10: 1153 IO-APIC-level via82cxxx, eth0
> 11: 2796 IO-APIC-level ide2, ide3
> 12: 0 IO-APIC-edge PS/2 Mouse
> 14: 2441 IO-APIC-edge ide0
> 15: 2879 IO-APIC-edge ide1
> NMI: 0
> LOC: 25428
> ERR: 0
> MIS: 0
>
> I am not sure if this means that it is currently using the APIC or
> not,
Yes, it is using the APIC. You can see that by the "LOC" line. Also
you have IO-APIC as seen by IO-APIC-level/edge. Btw level interrupts
can be shared. While it's annoying to see stuff share, i don't think
it really matters much. My boxen share IRQs even though I have plenty
of free interrupts. Sometimes you can ask the bios to reassign things.
> but I can never get IRQs 16-23 to get assigned to any of the cards. I
> tried using pirq= , but still doesn't work Here is part from dmesg that
> gives some info:
I have an ASUS A7M266D. It's a dual board with AMD chipset, but yours
might be similar. I had to use MPS v1.4 to get it to map high IRQs.
I've got an old quad ppro and it never uses high IRQs.
dual AMD
jk@sophia:~$ cat /proc/interrupts
CPU0 CPU1
0: 282277 242808 IO-APIC-edge timer
1: 392 443 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
9: 0 0 IO-APIC-edge acpi
17: 7040 7341 IO-APIC-level aic7xxx, cmpci
18: 3772 3755 IO-APIC-level eth0
NMI: 0 0
LOC: 525003 525001
ERR: 0
MIS: 0
quad PPRO
euler(jk)$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 9176661 8955067 8291155 8074980 IO-APIC-edge timer
1: 27293 26827 26057 26434 IO-APIC-edge keyboard
2: 0 0 0 0 XT-PIC cascade
3: 507146 480679 464739 509153 IO-APIC-edge serial
5: 6552 6236 6384 6403 IO-APIC-edge soundblaster
12: 686549 687806 686945 685721 IO-APIC-level eth0, PS/2 Mouse
14: 7 8 8 7 IO-APIC-level sym53c8xx
15: 380622 379376 378306 379596 IO-APIC-level sym53c8xx
NMI: 0 0 0 0
LOC: 34498270 34498324 34498324 34498322
ERR: 0
MIS: 5
> Linux version 2.4.20-pre8 (root@commodore) (gcc version 2.95.3 20010315
> (release)) #4 Mon Sep 30 18:21:27 EDT 2002
> BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 0000000010000000 (usable)
> BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
> 256MB LOWMEM available.
> found SMP MP-table at 000f5ec0
> hm, page 000f5000 reserved twice.
> hm, page 000f6000 reserved twice.
> hm, page 000f1000 reserved twice.
> hm, page 000f2000 reserved twice.
> On node 0 totalpages: 65536
> zone(0): 4096 pages.
> zone(1): 61440 pages.
> zone(2): 0 pages.
> Intel MultiProcessor Specification v1.1
> Virtual Wire compatibility mode.
> OEM ID: OEM00000 Product ID: PROD00000000 APIC at: 0xFEE00000
> Processor #0 Pentium(tm) Pro APIC version 17
> I/O APIC #2 Version 17 at 0xFEC00000.
> Processors: 1
> Kernel command line: auto BOOT_IMAGE=Linux ro root=900 hda=4865,255,63
> hdc=4865,255,63 hde=4865,255,63 pirq=5,11,10
> ide_setup: hda=4865,255,63
> ide_setup: hdc=4865,255,63
> ide_setup: hde=4865,255,63
> PIRQ redirection, working around broken MP-BIOS.
> ... PIRQ0 -> IRQ 5
> ... PIRQ1 -> IRQ 11
> ... PIRQ2 -> IRQ 10
> Initializing CPU#0
> Detected 1394.448 MHz processor.
> Console: colour VGA+ 80x25
> Calibrating delay loop... 2778.72 BogoMIPS
> Memory: 256580k/262144k available (1361k kernel code, 5176k reserved, 593k
> data, 96k init, 0k highmem)
> Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
> Inode cache hash table entries: 16384 (order: 5, 131072 bytes)
> Mount-cache hash table entries: 4096 (order: 3, 32768 bytes)
> Buffer-cache hash table entries: 16384 (order: 4, 65536 bytes)
> Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
> CPU: Before vendor init, caps: 0383fbff c1cbfbff 00000000, vendor = 2
> CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
> CPU: L2 Cache: 256K (64 bytes/line)
> CPU: After vendor init, caps: 0383fbff c1cbfbff 00000000 00000000
> Intel machine check architecture supported.
> Intel machine check reporting enabled on CPU#0.
> CPU: After generic, caps: 0383fbff c1cbfbff 00000000 00000000
> CPU: Common caps: 0383fbff c1cbfbff 00000000 00000000
> CPU: AMD Athlon(tm) XP 1600+ stepping 02
> Enabling fast FPU save and restore... done.
> Enabling unmasked SIMD FPU exception support... done.
> Checking 'hlt' instruction... OK.
> POSIX conformance testing by UNIFIX
> enabled ExtINT on CPU#0
> ESR value before enabling vector: 00000000
> ESR value after enabling vector: 00000000
> 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, 2-16, 2-17, 2-18, 2-19, 2-20, 2-21, 2-22, 2-23
> not connected.
> ..TIMER: vector=0x31 pin1=2 pin2=0
> number of MP IRQ sources: 16.
> number of IO-APIC #2 registers: 24.
> testing the IO APIC.......................
>
> IO APIC #2......
> .... register #00: 02000000
> ....... : physical APIC id: 02
> .... register #01: 00178011
> ....... : max redirection entries: 0017
> ....... : PRQ implemented: 1
> ....... : IO APIC version: 0011
> .... register #02: 00000000
> ....... : arbitration: 00
> .... IRQ redirection table:
> NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:
> 00 000 00 1 0 0 0 0 0 0 00
> ......
> ......
> IRQ to pin mappings:
> IRQ0 -> 0:2
> IRQ1 -> 0:1
> IRQ3 -> 0:3
> IRQ4 -> 0:4
> IRQ5 -> 0:5
> IRQ6 -> 0:6
> IRQ7 -> 0:7
> IRQ8 -> 0:8
> IRQ9 -> 0:9
> IRQ10 -> 0:10
> IRQ11 -> 0:11
> IRQ12 -> 0:12
> IRQ13 -> 0:13
> IRQ14 -> 0:14
> IRQ15 -> 0:15
> .................................... done.
> Using local APIC timer interrupts.
Yes you have both IO-APIC and local APIC!
-- Johan KULLSTAM - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/