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Date: Thu, 20 Feb 1997 19:37:20 +0100
From: se@freebsd.org (Stefan Esser)
To: max@rnd.runnet.ru (Maxim A. Bolotin)
Cc: se@freebsd.org (Stefan Esser), hackers@freebsd.org
Subject: Re: Acer ALTOS 7000 instalation problem.
References: <19970218205749.IK34225@x14.mi.uni-koeln.de> <Pine.BSF.3.95q.970220192849.337A-100000@altos.rnd.runnet.ru>
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In-Reply-To: <Pine.BSF.3.95q.970220192849.337A-100000@altos.rnd.runnet.ru>; from Maxim A. Bolotin on Feb 20, 1997 19:30:37 +0300
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On Feb 20, max@rnd.runnet.ru (Maxim A. Bolotin) wrote:
> OK, Here's what I have with controller pci0
> 
> Probing for devices on the EISA bus
> ahc0: <Adaptec aic7770 SCSI host adapter> at 0x9c00-0x9cff irq 11
> ahc0: on eisa0 slot 9

> pcibus_setup(1):	mode 1 addr port (0x0cf8) is 0x81000800
> pcibus_setup(2):	mode 2 enable port (0x0cf8) is 0x00
> pcibus_setup(2a):	mode2res=0x0e (0x0e)
> pcibus_setup(2a):	now trying mechanism 2
> pcibus_check:	device 0 1 2 3 is there (id=00000021)
> Probing for devices on PCI bus 0:
> 	configuration mode 2 allows 16 devices.
> vga0 <Display device> rev 0 int _ irq ?? on pci0:3
> vga1 <Display device> rev 0 int _ irq ?? on pci0:7
> vga? <Display device> mirrored on pci0:11
> vga? <Display device> mirrored on pci0:15
> Probing for devices on the ISA bus:

Ok, I see ...

Thanks for sending this message log!

The problem is, that EISA and PCI use overlapping port regions,
and for the probe code, it appears as if there really was a PCI
device in slot 3. The value read is valid, and while no device
with that ID exists, the code can't possibly know.

I've got an idea for another test, which would find that there
isn't really a PCI bus in your system. But that test will need
to write into EISA address space ports, and while I can restore
the values previously read, I can't be sure that the device has
not been confused by the test ...

As soon as I have a patch ready, you'll receive it for testing.

Regards, STefan