getpir utility for creation of irq tables.c doubt ?

Hi,

My lspci O/P is as below, which seems to have 6 slots, 4 on bus 0 and
2 on bus 1. I hope this interpretation is correct.

****lspci O/P*****
00:00.0 Host bridge: Intel Corporation 82810E GMCH [Graphics Memory Controller Hub] (rev 03)
00:01.0 VGA compatible controller: Intel Corporation 82810E CGC [Chipset Graphics Controller] (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801AA 82810 PCI Bridge (rev 02)
00:1f.0 ISA bridge: Intel Corporation 82801AA 82810 Chipset ISA Bridge (LPC) (rev 02)
00:1f.1 IDE interface: Intel Corporation 82801AA 82810 Chipset IDE (rev 02)
00:1f.2 USB Controller: Intel Corporation 82801AA 82810 Chipset USB (rev 02)
00:1f.3 SMBus: Intel Corporation 82801AA 82810 Chipset SMBus (rev 02)
01:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev 10)
01:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev 10)
****lspci O/P*****

And the irq_tables.c O/P after getpir is as below :

****getpir O/P*****
/* This file was generated by getpir.c, do not modify!
   (but if you do, please run checkpir on it to verify)
   Contains the IRQ Routing Table dumped directly from your memory , wich BIOS sets up

Documentation at : http://www.microsoft.com/hwdev/busbios/PCIIRQ.HTM
*/

#include <arch/pirq_routing.h>

const struct irq_routing_table intel_irq_routing_table = {
        PIRQ_SIGNATURE, /* u32 signature */
        PIRQ_VERSION,   /* u16 version   */
        32+16*4,        /* there can be total 4 devices on the bus */
        0,           /* Where the interrupt router lies (bus) */
        0xf8,           /* Where the interrupt router lies (dev) */
        0x1c00,         /* IRQs devoted exclusively to PCI usage */
        0x8086,         /* Vendor */
        0x7000,         /* Device */
        0,         /* Crap (miniport) */
        { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* u8 rfu[11] */
        0xa9,         /*  u8 checksum , this hase to set to some value that would give 0 after the sum of all bytes for this structure (including checksum) */
        {
                {0,0x80, {{0x61, 0xdeb8}, {0x62, 0xdeb8}, {0x63, 0xdeb8}, {0x60, 0xdeb8}}, 0x2, 0},
                {0,0x8, {{0x60, 0xdeb8}, {0x61, 0xdeb8}, {0x62, 0xdeb8}, {0x63, 0xdeb8}}, 0, 0},
                {0,0xf9, {{0x60, 0xdeb8}, {0x61, 0xdeb8}, {0x62, 0xdeb8}, {0x63, 0xdeb8}}, 0, 0},
                {0x40,0, {{0, 0}, {0, 0}, {0, 0}, {0, 0}}, 0, 0},
        }
};

****getpir O/P*****

It does not seem to list the details of the bus 1 for ethernet controller.
Any suggestions.

Regards
Deepak

[ron minnich]

getpir just reads the $PIR table in memory as set by the bios.

I am wondering if the bios on your board is one of the defective BIOSes 
that doesn't have the $PIR entries for all devices. There are many of 
these. If so, you are going to have to hand-edit that .c file and add the 
entries yourself.

in the case of defective $PIR tables what the BIOS writers do is just set 
the IRQ line by hand in the pci device.

ron

[Andrew Ip]

> getpir just reads the $PIR table in memory as set by the bios. 
> I am wondering if the bios on your board is one of the defective BIOSes 
> that doesn't have the $PIR entries for all devices. There are many of 
> these. If so, you are going to have to hand-edit that .c file and add the 
> entries yourself. 
> in the case of defective $PIR tables what the BIOS writers do is just set 
> the IRQ line by hand in the pci device.

Sometimes you can just trust the value from stock PIRQ table.  Some
boards come with faulty table.

-Andrew

[ron minnich]

On Tue, 20 May 2003, Andrew Ip wrote:
> Sometimes you can just trust the value from stock PIRQ table.  Some
> boards come with faulty table.

yes. Deepak, are the two ethernet devices built into the motherboard?

ron

[Deepak Kotian]

Yes, there are 2 of them built into it.
One more question, if we the HAVE_PIRQ option is enabled, I 
have seen some kernel patches to be applied in this case. Could someone
explain the significance of it.

Regards
Deepak

----- Original Message ----- 
From: "ron minnich" 
To: "Andrew Ip" 
Cc: ; 
Sent: Tuesday, May 20, 2003 6:45 PM
Subject: Re: getpir utility for creation of irq tables.c doubt ?
> On Tue, 20 May 2003, Andrew Ip wrote:
> > Sometimes you can just trust the value from stock PIRQ table.  Some
> > boards come with faulty table.
>
> yes. Deepak, are the two ethernet devices built into the motherboard?
>
> ron

[ron minnich]

On Tue, 20 May 2003, Deepak Kotian wrote:
> Yes, there are 2 of them built into it.

ok, here's an option. In the mainboard.c file, just the the IRQ line 
register to the correct value.

ron