[OpenBIOS] [Qemu-ppc] Changing CD-ROM path

[Amadeusz Sławiński]

On Sat, Jun 22, 2013 at 03:21:50PM -0400, Programmingkid wrote:
> 
> On Jun 22, 2013, at 3:09 PM, Alexander Graf wrote:
> 
> > 
> > On 22.06.2013, at 21:04, Programmingkid wrote:
> > 
> >> 
> >> On Jun 22, 2013, at 2:05 PM, Alexander Graf wrote:
> >> 
> >>> 
> >>> On 22.06.2013, at 19:53, Programmingkid wrote:
> >>> 
> >>>> 
> >>>> On Jun 22, 2013, at 1:27 PM, Alexander Graf wrote:
> >>>> 
> >>>>> 
> >>>>> On 22.06.2013, at 18:50, Programmingkid wrote:
> >>>>> 
> >>>>>> Mac OS 10.2 requires the boot CD-ROM to be located here: /pci/mac-io/ide at 1000/@0:9. It is currently located here:  /pci at 80000000/pci-ata at 4/ata-2 at 500/cdrom at 0. How would I go about changing the CD-ROM to this location? I'm looking for a specific file or files to make this change.
> >>>>> 
> >>>>> This is an OF path, which is up to OpenBIOS to construct.
> >>>>> 
> >>>>> What makes you think that Mac OS searches at that exact location?
> >>>>> 
> >>>>> 
> >>>>> Alex
> >>>>> 
> >>>> 
> >>>> XNU (Mac OS X's kernel) prints this line to the screen: 
> >>>> From path: “ide1/@0:9,\mach_kernel”, Waiting on <dict ID=”0”><key>IOPathMatch</key><string ID=”1”>IODeviceTree:/pci/mac-io/ide at 1000/@0:9</string></dict>
> >>>> 
> >>>> The key IOPathMatch means the location of the cdrom has to be at a certain location. In this case it is /pci/mac-io/ide at 1000/@0:9.
> >>> 
> >>> Yes, but I don't see where Mac OS X has this hardcoded. It gets passed in somehow.
> >> 
> >> I think a kernel extension does it. I don't know which one.
> > 
> > Well, I've tried to grep through the full file system of the 10.2 ISO and don't find anything that would indicate the path above. It has to come from somewhere ...
> > 
> >> 
> >>> 
> >>> What machine type is this? g3beige?
> >> 
> >> g3beige.
> >> 
> >>> On there, I don't see an ide1 alias anywhere:
> >>> 
> >>> 0 > dev /aliases  ok
> >>> 0 > ls
> >>> ok
> >>> 0 > .properties
> >>> name                      "aliases"
> >>> screen                    "/pci at 80000000/mac-io at 3/escc/ch-b"
> >>> mac-io                    "/pci at 80000000/mac-io at 3"
> >>> via-cuda                  "/pci at 80000000/mac-io at 3/via-cuda"
> >>> adb-keyboard              "/pci at 80000000/mac-io at 3/via-cuda/adb/keyboard"
> >>> adb-mouse                 "/pci at 80000000/mac-io at 3/via-cuda/adb/mouse"
> >>> rtc                       "/pci at 80000000/mac-io at 3/via-cuda/rtc"
> >>> nvram                     "/pci at 80000000/mac-io at 3/nvram"
> >>> ttya                      "/pci at 80000000/mac-io at 3/escc/ch-a"
> >>> scca                      "/pci at 80000000/mac-io at 3/escc/ch-a"
> >>> ttyb                      "/pci at 80000000/mac-io at 3/escc/ch-b"
> >>> sccb                      "/pci at 80000000/mac-io at 3/escc/ch-b"
> >>> ide0                      "/pci at 80000000/pci-ata at 4/ata-2/cdrom"
> >>> cd                        "/pci at 80000000/pci-ata at 4/ata-2/cdrom"
> >>> cdrom                     "/pci at 80000000/pci-ata at 4/ata-2/cdrom"
> >>> keyboard                  "/pci at 80000000/mac-io at 3/via-cuda at 16000/adb/keyboard at 8"
> >>> ok
> >>> 
> >>> Somehow Mac OS resolves "ide1" into "/pci/mac-io/ide at 1000". That's the part where the logic fails.
> >> 
> >> Do you think adding ide1 to the /aliases node will fix things? I guessing ide1 should equal ide0. The problem I see with this plan is the pci-ata node. A real Beige G3 doesn't have one in that path. 
> > 
> > I think it's worth a try. It looks almost as if ide0 is a misnomer and it really should be ide1 there. Not sure.
> Ok. I will try it.
> 
> > 
> > How do you enable verbose boot in bootx?
> > 
> 
> Hold down the command key and v while starting up.

Paths also depend on how you pass boot device:

For example with
-drive file=/path/to/cdrom.iso,media=cdrom,index=0,if=ide

I get
ide0                      "/pci at 80000000/mac-io at 3/ata-1/cdrom"
cd                        "/pci at 80000000/mac-io at 3/ata-1/cdrom"
cdrom                     "/pci at 80000000/mac-io at 3/ata-1/cdrom"
ide1                      "/pci at 80000000/pci-ata at 4/ata-2/cdrom"

(also now that I look at it should this ide1 even be here?)

and with -cdrom /path/to/cdrom.iso

ide0                      "/pci at 80000000/pci-ata at 4/ata-2/cdrom"
cdrom                     "/pci at 80000000/pci-ata at 4/ata-2/cdrom"
cd                        "/pci at 80000000/pci-ata at 4/ata-2/cdrom"