distrib/luna68k: add "build.sh live-image" support for luna68k

Using recently added "USE_MDBOOTPART" in Makefile.bootimage with MD rules.
A generated live-image is confirmed working on nono 1.6.4 with LUNA's ROM:
---
% nono-cli -V vmtype=luna -V prom-image=LUNAROM.DAT -V dipsw-autoboot=no -V dipsw-serial=yes -V hostcom-driver=stdio -V spc0-id6-image=hd,NetBSD-11.99.5-luna68k-live.img -V spc0-id6-writeignore=1
(PROM) Unknown PROM version
(SCSIHD6) write is ignored
Diagnostic Start....  11.549'836'096 805b XP(HD647180) WriteInternalIO 53H(DERA) <- $07 (NOT IMPLEMENTED)
  11.549'839'519 8060 XP(HD647180) WriteInternalIO 60H(IODRA) <- $50 (NOT IMPLEMENTED)
  11.549'842'942 8065 XP(HD647180) WriteInternalIO 70H(DDRA) <- $70 (NOT IMPLEMENTED)
  11.650'402'532 8528 XP(HD647180) WriteInternalIO 60H(IODRA) <- $20 (NOT IMPLEMENTED)
  11.653'401'080 8bd1 XP(HD647180) ReadInternalIO 48H(T2CSR1) -> $ff (NOT IMPLEMENTED)
  11.653'404'340 8bd6 XP(HD647180) WriteInternalIO 48H(T2CSR1) <- $ff (NOT IMPLEMENTED)
  11.653'406'785 8bd9 XP(HD647180) ReadInternalIO 49H(T2CSR2) -> $ff (NOT IMPLEMENTED)
  11.653'410'045 8bde XP(HD647180) WriteInternalIO 49H(T2CSR2) <- $ff (NOT IMPLEMENTED)
No problems in hardware
OMRON WS Monitor Ver4.25 (Thu May 16 11:54:02 1991) - 0x01000000 bytes of memory
"BSD Monitor-mode"
>k
ctlr: dk
drv: 0
par: c  d
fnam: vmunix  boot
>g
SPC RESET CONDITION !!
>x

>> NetBSD/luna68k boot, Revision 1.12 (Sat Jan 17 07:19:27 UTC 2026)
>> (based on Stinger ver 0.0 [Phase-31])

Machine model   = LUNA-I
Physical Memory = 0x1000000  (16 MB)

sc0 at 0xe1000000: async, parity, ID 7
 ID 6: NONO SCSIHD rev 0, 512 bytes/sect x 3145728 sectors
le0: Am7990 LANCE Ethernet, mem at 0x71010000
le0: Ethernet address = 00:00:0a:02:4d:36

Press return to boot now, any other key for boot menu
booting sd(6,0)netbsd - starting in 0 seconds.
type "help" for help.
boot> boot -s
Booting sd(6,0)netbsd (howto 0x2)
2358892+97604 [336560+209989]=0x2dd6c8
[   1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[   1.0000000]     2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[   1.0000000]     2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[   1.0000000]     2024, 2025, 2026
[   1.0000000]     The NetBSD Foundation, Inc.  All rights reserved.
[   1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[   1.0000000]     The Regents of the University of California.  All rights reserved.

[   1.0000000] NetBSD 11.99.5 (GENERIC) #0: Sat Jan 17 16:26:14 JST 2026
[   1.0000000]  tsutsui@proslim:/home/tsutsui/obj.luna68k/sys/arch/luna68k/compile/GENERIC
[   1.0000000] LUNA-I (MC68030 CPU+MMU, MC68881 FPU)
 :

Author: tsutsui

distrib/luna68k/Makefile

@@ -1,9 +1,13 @@
-#	$NetBSD: Makefile,v 1.2 2025/09/23 20:12:07 rillig Exp $
+#	$NetBSD: Makefile,v 1.3 2026/01/18 00:12:10 tsutsui Exp $
 
 SUBDIR=		ramdisk .WAIT instkernel .WAIT cdroms
+SUBDIR+=	liveimage
 TARGETS+=	release
 
 iso_image: .MAKE
 	${MAKEDIRTARGET} cdroms iso_image
 
+live_image: .MAKE
+	${MAKEDIRTARGET} liveimage live_image
+
 .include <bsd.subdir.mk>

distrib/luna68k/liveimage/Makefile

@@ -0,0 +1,51 @@
+#	$NetBSD: Makefile,v 1.1 2026/01/18 00:12:11 tsutsui Exp $
+
+LIVEIMGBASE=	NetBSD-${DISTRIBVER}-luna68k-live	# gives ${IMGBASE}.img
+
+.include <bsd.own.mk>
+
+LIVEIMAGEMB?=	1536	# < 2GB is preferred for SCSI emulators that use FAT32
+MDBOOTPARTMB?=	8	# as PART_BOOT in sysinst/arch/luna68k/md.h
+
+USE_MBR=	no
+USE_GPT=	no
+USE_MDBOOTPART=	yes
+USE_SUNLABEL=	yes
+
+DISKPROTO_IN=	${.CURDIR}/diskproto.in
+FSTAB_IN=	${.CURDIR}/fstab.in
+SPEC_EXTRA=	${.CURDIR}/spec.in
+
+.include "${.CURDIR}/../../common/bootimage/Makefile.liveimage"
+
+MDBOOTPARTFILES=	${WORKDIR}/usr/mdec/boot
+MDBOOTPARTMAKEFSOPTIONS= -t ffs -o version=0,bsize=4096,fsize=512,density=2048
+SPEC_BOOT=		spec.boot
+CLEANFILES+=		${SPEC_BOOT}
+
+${MDBOOTPARTFILES}: ${TARGETFS}
+	# ${MDBOOTPARTFILES} are assumed extracted during to ${WORKDIR}
+	# from binary sets during ${TARGETFS} image build
+
+${WORKMDBOOTPART}: ${TARGETFS} ${MDBOOTPARTFILES}
+	@echo create MD boot partition for bootstrap files...
+	@${MKDIR} ${MKDIRPERM} ${WORKMDBOOTPARTDIR}
+	rm -f ${SPEC_BOOT}
+	cp ${.CURDIR}/spec.boot.in ${SPEC_BOOT}
+	@echo Copying files for MD boot partition...
+.for f in ${MDBOOTPARTFILES}
+	@if [ ! -f ${f} ]; then 					\
+		echo "${f} in MDBOOTPARTFILES not found, aborting";	\
+		false; 							\
+	fi
+	${INSTALL} ${COPY} -m 0644 ${f} ${WORKMDBOOTPARTDIR}
+	echo "./$$(basename ${f}) type=file uname=root gname=wheel mode=0644" \
+	    >> ${SPEC_BOOT}
+.endfor
+	${RM} -f ${WORKMDBOOTPART}
+	${TOOL_MAKEFS} -M ${MDBOOTPARTMB}m -m ${MDBOOTPARTMB}m		\
+	    -xx -F ${SPEC_BOOT}						\
+	    -B ${TARGET_ENDIANNESS}					\
+	    ${MAKEFS_TIMESTAMP}						\
+	    ${MDBOOTPARTMAKEFSOPTIONS}					\
+	    ${WORKMDBOOTPART} ${WORKMDBOOTPARTDIR}

distrib/luna68k/liveimage/diskproto.in

@@ -0,0 +1,25 @@
+# $NetBSD: diskproto.in,v 1.1 2026/01/18 00:12:11 tsutsui Exp $
+type: SCSI
+disk: liveimage
+label:
+flags:
+bytes/sector: 512
+sectors/track: @@SECTORS@@
+tracks/cylinder: @@HEADS@@
+sectors/cylinder: @@SECPERCYLINDERS@@
+cylinders: @@CYLINDERS@@
+total sectors: @@IMAGESECTORS@@
+rpm: 3600
+interleave: 1
+trackskew: 0
+cylinderskew: 0
+headswitch: 0           # microseconds
+track-to-track seek: 0  # microseconds
+drivedata: 0
+
+8 partitions:
+#        size    offset     fstype [fsize bsize cpg/sgs]
+a:    @@FSSECTORS@@ @@FSOFFSET@@ 4.2BSD 2048 16384 16
+b:    @@SWAPSECTORS@@ @@SWAPOFFSET@@ swap
+c:    @@IMAGESECTORS@@ 0 unused 0 0
+d:    @@MDBOOTPARTSECTORS@@ @@MDBOOTPARTOFFSET@@ 4.2BSD 512 4096 16

distrib/luna68k/liveimage/fstab.in

@@ -0,0 +1,7 @@
+ROOT.a		/		ffs	rw		1 1
+ROOT.b		none		none	sw		0 0
+ROOT.d		/boot		ffs	rw		1 2
+ptyfs		/dev/pts	ptyfs	rw		0 0
+kernfs		/kern		kernfs	rw,noauto	0 0
+procfs		/proc		procfs	rw,noauto	0 0
+tmpfs		/var/shm	tmpfs	rw,-m1777,-sram%25 0 0

distrib/luna68k/liveimage/spec.boot.in

@@ -0,0 +1,2 @@
+# $NetBSD: spec.boot.in,v 1.1 2026/01/18 00:12:11 tsutsui Exp $
+.		type=dir uname=root gname=wheel mode=0755

distrib/luna68k/liveimage/spec.in

@@ -0,0 +1,2 @@
+# $NetBSD: spec.in,v 1.1 2026/01/18 00:12:11 tsutsui Exp $
+./boot		type=dir uname=root gname=wheel mode=0755