From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <5fefe2e249817316058b64c44b49c64d@gmx.de>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Intel ICH7 AHCI
Date: Sun, 24 Feb 2008 05:22:47 +0100
From: cinap_lenrek@gmx.de
In-Reply-To: <6b79d706bb543819933090b511a377da@quanstro.net>
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> > Have tried Plan9 on Intel D945PLrn mainboard P4 Dualcore and
> > MP, Network and AHCI doesnt work out of the box.
> >
> > ok, i try to resolve AHCI first...
> >
> > the pci ids are 0x8086/0x27c0 for the SATA controller (82801GB) and
> > i tried to add this to the match function as Tich in sdiahci.c, but this
> > fails on:
> >
> > if (p->mem[Abar].bar == 0)
> > 	continue;
>
> there's a reason for this check. :-)  if bios isn't setting up Abar, then
> either you're chipset doesn't support ahci or it isn't configured for
> ahci.  generally the options are Enhanced mode with Ahci enabled.
> they're different for esb southbridges.
>
> intel says that the 82801gb does not support ahci mode.
> 	http://www.intel.com/support/chipsets/imsm/sb/CS-020644.htm
> ich7 should support your drives in *ata* mode.  you may need
> to add the vid/did to sdata.c  you can double check with pci.
> the device class/programming interface/subclass should be 01.06.01.
> you can check for a device with the proper configuration with this
> command:
>
> 	% pci|grep 'disk 01\.06\.01'

i have 2 entries in pci for disk with class/interf/subclass of:

disk 01.01.8a
disk 01.01.8f

but no 01.06.01 entries.


> > This machine also fails MP. I get mpintrenable() errors for any devices
> > including the keyboard and then i end up on the boot prompt unable
> > to type anything.
> >
> > mpintrenable: out of choices -1 -1
>
> generally this means that your machine's mp table is broken.  you can add
> 	*nomp=1

yep, that works

> to your plan9.ini file to get around this.  unfortunately, using mp interrupts
> there's no easy way to replicate what this bios does in setting up the
> interrupt routing on a modern machine.

bad :-(

> - erik