On Thu, 7 Feb 2002, Bill Studenmund wrote:

> I'd like to make two extentions to this. The first is to add,
> "NetBSD/Mac68k", and change how the /MacPPC and /Mac68k partitions work.
> They would both be "root" partitions, but slot a would, by default, go
> first to the partition named after the port. So you could make a dual-boot
> hard disk, and the macppc part would boot off of the "NetBSD/MacPPC"
> partition, and the mac68k part would boot off of the "NetBSD/Mac68k" one.

Sounds good.

> The second change is to add a valid bzb to these partition types. If one
> is present, we then use the bzbType field to indicate what NetBSD
> partition type to report for the partition. That way we can mark
> partitions as having LFS file systems on them for instance. One of these
> partitions ("NetBSD*") w/o a valid bzb would be reported as having an ffs.

Coincidently, I've developed a patch to do this already, and I was just
thinking about running it by you. I forgot about NetBSD/macppc using the
same disklabel, so I just gave LFS the next free bit, and made it prefer
the "f" slot. The mac just crashed copying a cross-built libc from the
an nfs mounted partition, but you can't blame LFS for that. :-)

I'm also looking at adding the capability to make an LFS partition from
within the installer. That's when I noticed that the disklabel faking is
borked (PR 15528).

Here's the kernel patch I'm running on 1.5AZ/mac68k/ELF:

Index: include/disklabel.h
===================================================================
RCS file: /cvsroot/syssrc/sys/arch/mac68k/include/disklabel.h,v
retrieving revision 1.6
diff -u -r1.6 disklabel.h
--- include/disklabel.h	1999/01/27 21:03:46	1.6
+++ include/disklabel.h	2002/02/07 18:37:51
@@ -172,5 +172,6 @@
 #define BZB_TYPESWAP	3
 #define BZB_ROOTFS	0x8000
 #define BZB_USRFS	0x4000
+#define BZB_LFS 	0x2000

 #endif /* _MACHINE_DISKLABEL_H_ */
Index: mac68k/disksubr.c
===================================================================
RCS file: /cvsroot/syssrc/sys/arch/mac68k/mac68k/disksubr.c,v
retrieving revision 1.39
diff -u -r1.39 disksubr.c
--- mac68k/disksubr.c	2001/11/23 22:31:22	1.39
+++ mac68k/disksubr.c	2002/02/07 18:37:51
@@ -85,6 +85,7 @@
 #define SWAP_PART 3
 #define HFS_PART 4
 #define SCRATCH_PART 5
+#define LFS_PART 6

 int fat_types[] = {
 	MBR_PTYPE_FAT12, MBR_PTYPE_FAT16S,
@@ -159,6 +160,8 @@
 			type = UFS_PART;
 		else if (bzb->bzbType == BZB_TYPESWAP)
 			type = SWAP_PART;
+		else if (bzb->bzbFlags & BZB_LFS)
+			type = LFS_PART;
 		else
 			type = SCRATCH_PART;
 	} else if (strcmp(PART_TYPE_MAC, typestr) == 0)
@@ -215,6 +218,10 @@
 			setpartition(part + i, &lp->d_partitions[1], FS_SWAP);
 			if (*maxslot < 1)
 				*maxslot = 1;
+		} else if (type == LFS_PART) {
+			setpartition(part + i, &lp->d_partitions[5], FS_BSDLFS);
+			if (*maxslot < 5)
+				*maxslot = 5;
 		} else
 			printf("disksubr.c: can't do type %d\n", type);

@@ -233,9 +240,10 @@
  * next fill in the disklabel with info like this
  * next fill in the root, usr, and swap parts.
  * then look for anything else and fit it in.
- *	A: root
+ *	A: Root & Usr
  *	B: Swap
  *	C: Whole disk
+ *	F: LFS
  *	G: Usr
  *
  *
@@ -285,7 +293,10 @@
 		getNamedType(part, NUM_PARTS, lp, ROOT_PART, -1, &maxslot);
 	if (getNamedType(part, NUM_PARTS, lp, UFS_PART, 0, &maxslot))
 		getNamedType(part, NUM_PARTS, lp, UFS_PART, -1, &maxslot);
-	getNamedType(part, NUM_PARTS, lp, SWAP_PART, -1, &maxslot);
+	if (getNamedType(part, NUM_PARTS, lp, SWAP_PART, 0, &maxslot))
+		getNamedType(part, NUM_PARTS, lp, SWAP_PART, -1, &maxslot);
+	if (getNamedType(part, NUM_PARTS, lp, LFS_PART, 0, &maxslot))
+		getNamedType(part, NUM_PARTS, lp, LFS_PART, -1, &maxslot);

 	/* Now get as many of the rest of the partitions as we can */
 	for (i = 0; i < NUM_PARTS; i++) {
@@ -312,6 +323,9 @@
 			break;
 		case SCRATCH_PART:
 			setpartition(part + i, pp, FS_OTHER);
+			break;
+		case LFS_PART:
+			setpartition(part + i, pp, FS_BSDLFS);
 			break;
 		default:
 			slot = 0;

Also on my wish list would be support for the Apple MSDOS compatible
partitions, but I forgot how to make one under Mac OS, or I threw away
the extension, or something.

Frederick