Re: [OpenBIOS] testing Mac OS X boot on latest trunk (revision 1075)

[Mark Cave-Ayland]

On 03/12/12 22:30, Amadeusz Sławiński wrote:
> Code for reference (and in case I need to use it again :P)
>
> printk("mac-parts: counted %d partitions\n", __be32_to_cpu(par.pmMapBlkCnt));
> for (d = 1; d<= __be32_to_cpu(par.pmMapBlkCnt); d++) {
>    		
> SEEK( bs * d );
> READ(&par, sizeof(par) );
>
> printk("Partition: %d\n", d);
>
> printk("pmSig: %x\n", __be16_to_cpu(par.pmSig));
> printk("pmSigPad: %x\n", __be16_to_cpu(par.pmSigPad));
> printk("pmMapBlkCnt: %x\n", __be32_to_cpu(par.pmMapBlkCnt));
> printk("pmPyPartStart: %x\n", __be32_to_cpu(par.pmPyPartStart));
>
> printk("pmPartBlkCnt: %x\n", __be32_to_cpu(par.pmPartBlkCnt));
> printk("pmPartName: %s\n", par.pmPartName);
> printk("pmPartType: %s\n", par.pmPartType);
>
> printk("pmLgDataStart: %x\n", __be32_to_cpu(par.pmLgDataStart));
> printk("pmDataCnt: %x\n", __be32_to_cpu(par.pmDataCnt));
> printk("pmPartStatus: %x\n", __be32_to_cpu(par.pmPartStatus));
> printk("pmLgBootStart: %x\n", __be32_to_cpu(par.pmLgBootStart));
> printk("pmBootSize: %x\n", __be32_to_cpu(par.pmBootSize));
> printk("pmBootLoad: %x\n", __be32_to_cpu(par.pmBootLoad));
> printk("pmBootLoad2: %x\n", __be32_to_cpu(par.pmBootLoad2));
> printk("pmBootEntry: %x\n", __be32_to_cpu(par.pmBootEntry));
> printk("pmBootEntry2: %x\n", __be32_to_cpu(par.pmBootEntry2));
> printk("pmBootCksum: %x\n", __be32_to_cpu(par.pmBootCksum));
> printk("pmPartType: %s\n", par.pmProcessor);
> printk("filler: %s\n", par.filler);
>
> printk("\n");
> }
>
> Output Max OS X 10.2 disk 1:
> > > mac-parts: counted 10 partitions
> > > Partition: 1
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 1
> > > pmPartBlkCnt: 3f
> > > pmPartName: Apple
> > > pmPartType: Apple_partition_map
> > > pmLgDataStart: 0
> > > pmDataCnt: 3f
> > > pmPartStatus: 17
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 2
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 40
> > > pmPartBlkCnt: 38
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver43
> > > pmLgDataStart: 0
> > > pmDataCnt: 38
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: 2400
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 7b04
> > > pmPartType:
> > > filler: ptDR
> > > Partition: 3
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 78
> > > pmPartBlkCnt: 8c
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver43_CD
> > > pmLgDataStart: 0
> > > pmDataCnt: 8c
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: c400
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 934b
> > > pmPartType:
> > > filler: CDrv
> > > Partition: 4
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 0
> > > pmPartBlkCnt: 0
> > > pmPartName:
> > > pmPartType: Apple_Void
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 5
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 104
> > > pmPartBlkCnt: 38
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver_ATAPI
> > > pmLgDataStart: 0
> > > pmDataCnt: 38
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: 2600
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 70da
> > > pmPartType:
> > > filler: ptDR
> > > Partition: 6
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 13c
> > > pmPartBlkCnt: 8c
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver_ATAPI
> > > pmLgDataStart: 0
> > > pmDataCnt: 8c
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: f200
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 8b46
> > > pmPartType:
> > > filler: ATPI
> > > Partition: 7
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 1c8
> > > pmPartBlkCnt: 200
> > > pmPartName: Patch Partition
> > > pmPartType: Apple_Patches
> > > pmLgDataStart: 0
> > > pmDataCnt: 200
> > > pmPartStatus: 1
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 1
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 8
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 0
> > > pmPartBlkCnt: 0
> > > pmPartName:
> > > pmPartType: Apple_Void
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 9
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 3c8
> > > pmPartBlkCnt: 1381e0
> > > pmPartName: Mac_OS_X
> > > pmPartType: Apple_HFS
> > > pmLgDataStart: 0
> > > pmDataCnt: 1381e0
> > > pmPartStatus: 4000007f
> > > pmLgBootStart: 3af0
> > > pmBootSize: c1000
> > > pmBootLoad: 1c00000
> > > pmBootLoad2: 0
> > > pmBootEntry: 1c00cb0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType: powerpc
> > > filler:
> > > Partition: 10
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 1385a8
> > > pmPartBlkCnt: b258
> > > pmPartName:
> > > pmPartType: Apple_Free
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
>
> Output Mac OS X 10.0
> > > mac-parts: counted 10 partitions
> > > Partition: 1
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 1
> > > pmPartBlkCnt: 3f
> > > pmPartName: Apple
> > > pmPartType: Apple_partition_map
> > > pmLgDataStart: 0
> > > pmDataCnt: 3f
> > > pmPartStatus: 17
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 2
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 40
> > > pmPartBlkCnt: 38
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver43
> > > pmLgDataStart: 0
> > > pmDataCnt: 38
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: 2400
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: eb19
> > > pmPartType:
> > > filler: ptDR
> > > Partition: 3
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 78
> > > pmPartBlkCnt: 78
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver43_CD
> > > pmLgDataStart: 0
> > > pmDataCnt: 78
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: c800
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: e9ad
> > > pmPartType:
> > > filler: CDrv
> > > Partition: 4
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 0
> > > pmPartBlkCnt: 0
> > > pmPartName:
> > > pmPartType: Apple_Void
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 5
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: f0
> > > pmPartBlkCnt: 38
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver_ATAPI
> > > pmLgDataStart: 0
> > > pmDataCnt: 38
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: 2600
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 3cd4
> > > pmPartType:
> > > filler: ptDR
> > > Partition: 6
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 128
> > > pmPartBlkCnt: 78
> > > pmPartName: Macintosh
> > > pmPartType: Apple_Driver_ATAPI
> > > pmLgDataStart: 0
> > > pmDataCnt: 78
> > > pmPartStatus: 37f
> > > pmLgBootStart: 0
> > > pmBootSize: ea00
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: ce67
> > > pmPartType:
> > > filler: ATPI
> > > Partition: 7
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 1a0
> > > pmPartBlkCnt: 200
> > > pmPartName: Patch Partition
> > > pmPartType: Apple_Patches
> > > pmLgDataStart: 0
> > > pmDataCnt: 200
> > > pmPartStatus: 1
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 4
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 8
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 0
> > > pmPartBlkCnt: 0
> > > pmPartName:
> > > pmPartType: Apple_Void
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:
> > > Partition: 9
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 3a0
> > > pmPartBlkCnt: 11a788
> > > pmPartName: Mac_OS_X
> > > pmPartType: Apple_HFS
> > > pmLgDataStart: 0
> > > pmDataCnt: 11a788
> > > pmPartStatus: 4000007f
> > > pmLgBootStart: 3af0
> > > pmBootSize: b4000
> > > pmBootLoad: 1c00000
> > > pmBootLoad2: 0
> > > pmBootEntry: 1c005b4
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType: powerpc
> > > filler:
> > > Partition: 10
> > > pmSig: 504d
> > > pmSigPad: 0
> > > pmMapBlkCnt: a
> > > pmPyPartStart: 11ab28
> > > pmPartBlkCnt: 254d0
> > > pmPartName:
> > > pmPartType: Apple_Free
> > > pmLgDataStart: 0
> > > pmDataCnt: 0
> > > pmPartStatus: 0
> > > pmLgBootStart: 0
> > > pmBootSize: 0
> > > pmBootLoad: 0
> > > pmBootLoad2: 0
> > > pmBootEntry: 0
> > > pmBootEntry2: 0
> > > pmBootCksum: 0
> > > pmPartType:
> > > filler:

Thanks a lot for this - this is extremely useful!

Based upon this, it looks as if OS X 10.0 and OS X 10.2 should boot with 
the standard CHRP boot procedure since kPartitionAUXIsBootValid is set 
on both the OS partitions. However, I realise now that I broke this with 
my interpose refactoring in an attempt to accommodate Mac disk images I 
had that *didn't* set this flag. I see that I also misunderstood the 
direct partition boot, but this was because of an existing bug failing 
to match the partition because the pmType string "powerpc" was not 
checked in a case-insensitive manner as per the CHRP specification. Sigh.

The other interesting thing is that kPartitionAUXIsBootValid is not set 
on your OS 10.4 upgrade disk. If you try and boot from this directly 
from a reset, can Apple's Open Firmware actually boot it? Or does it 
have to be launched from OS X?

ATB,

Mark.