r443 - openbios-devel/modules

Author: laurent
Date: 2009-02-05 01:16:54 +0100 (Thu, 05 Feb 2009)
New Revision: 443

Modified:
   openbios-devel/modules/disk-label.c
Log:
Allows to use disk (like CD-ROM) without partition map but with filesystem
on the full disk. We accept partition number 0 (which identifies the full
disk) and partition number 1 (we can see the disk as only one partition).

This is needed to boot openSUSE install CD which uses
"&device;:1,\suseboot\yaboot.ibm" as its boot path.

There is a Mac partition map on the CD, but
partition 1 is the partition map itself, and thus is not usable by a filesystem.
So we can guess, openFirmware must use ISO9660 instead of HFS and thus
to not use the Mac partition map, but the whole CD for the partition #1.

Disk openSUSE-ppc.iso: 135 MB, 135593984 bytes
4 heads, 32 sectors/track, 2069 cylinders
Units = cylinders of 128 * 512 = 65536 bytes

Device Boot      Start         End      Blocks   Id  System 
openSUSE-ppc.iso1               1           1          48   Apple_partition_map
openSUSE-ppc.iso2               1        2066      132160   Apple_HFS

Modified: openbios-devel/modules/disk-label.c
===================================================================
--- openbios-devel/modules/disk-label.c	2009-02-05 00:05:58 UTC (rev 442)
+++ openbios-devel/modules/disk-label.c	2009-02-05 00:16:54 UTC (rev 443)
@@ -78,6 +78,21 @@
    	}
    }

+        /* try to see if there is a filesystem without partition */
+
+        if (atol(parstr) == 0 || atol(parstr) == 1) {
+		PUSH_ih( my_self() );
+		selfword("find-filesystem");
+		ph = POP_ph();
+		if( ph ) {
+			push_str( filename );
+			PUSH_ph( ph );
+			fword("interpose");
+			success = 1;
+			goto out;
+		}
+	}
+
    /* find partition handler */
    seek_io( fd, 0 );
    if( read_io(fd, block0, sizeof(block0)) != sizeof(block0) )