Re: [PPC] quick test please? device tree path translation

[Mike Small <smallm@panix.com>]

On Sun, Oct 23, 2005 at 05:53:44PM -0500, Hollis Blanchard wrote:
> Hi, could PPC people give the attached shell script a try? For example,
> $ ./ofpathname /dev/hda
> /pci@80000000/pci-bridge@d/pci-ata@1/@0/disk@0
> 
> I'd like to make sure that the resulting Open Firmware device tree path 
> is accurate. I think we should use this script for GRUB installation, 
> which means that when the user says "grub-install /dev/hda2" this 
> script will tell us the proper setting of the OF "boot-device" 
> variable.
> 
> It seems to be working fine for disk, CD, and Zip drive on my Blue & 
> White G3, which has a slightly unusual ATA setup. I expect it to work 
> just fine on simple systems like laptops, but I'm particularly 
> interested in more unsual systems like Pegasos, or systems with lots of 
> IO and disks.
> 
> You can validate by comparing the output with 
> /proc/device-tree/aliases/hd, for example, or just try it out.
> 
> -Hollis

Seems to work for me.  It gives the same answers as ofpath (packaged
with yaboot 1.0.8), except for a usb floppy drive, which your script
can handle but ofpath cannot.  The machine is a 466Mhz G4 Powermac
(Digital Audio) with an IDE harddrive and cdrom drive, and a usb
floppy drive...


$ ./ofpathname /dev/hda
/pci@f2000000/mac-io@17/ata-4@1f000/disk@0
$ ./ofpathname /dev/hdc
/pci@f2000000/mac-io@17/ata-3@20000/disk@0
$ ./ofpathname /dev/sda
/pci@f2000000/usb@19/scsi@0/sd@0,0

(for comparison)
# ofpath /dev/hda
/pci@f2000000/mac-io@17/ata-4@1f000/disk@0:
# ofpath /dev/hdc
/pci@f2000000/mac-io@17/ata-3@20000/disk@0:
# ofpath /dev/sdc
ofpath: /proc/device-tree is broken.  Do not use BootX to boot, use yaboot.
ofpath: The yaboot HOWTO can be found here: http://www.alaska.net/~erbenson/doc

So your script seems better.

-- 
Mike Small
smallm@panix.com