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

Tue Dec 4 22:45:24 CET 2012

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.