[PATCH] x86: "make isoimage" support; FDINITRD= support; minor cleanups

Add a "make isoimage" to i386 and x86-64, which allows the automatic
creation of a bootable CD image.  It also adds an option FDINITRD= to
include an initrd of the user's choice in generated floppy- or CD boot
images.  Finally, some minor cleanups of the image generation code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 38 insertions, 7 deletions

diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index c848a5b3039..3e4adb1e224 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -103,7 +103,7 @@ AFLAGS += $(mflags-y)
 boot := arch/i386/boot
 
 PHONY += zImage bzImage compressed zlilo bzlilo \
-         zdisk bzdisk fdimage fdimage144 fdimage288 install
+         zdisk bzdisk fdimage fdimage144 fdimage288 isoimage install
 
 all: bzImage
 
@@ -122,7 +122,7 @@ zlilo bzlilo: vmlinux
 zdisk bzdisk: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) zdisk
 
-fdimage fdimage144 fdimage288: vmlinux
+fdimage fdimage144 fdimage288 isoimage: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) $@
 
 install:
@@ -139,6 +139,9 @@ define archhelp
   echo  '		   install to $$(INSTALL_PATH) and run lilo'
   echo  '  bzdisk       - Create a boot floppy in /dev/fd0'
   echo  '  fdimage      - Create a boot floppy image'
+  echo  '  isoimage     - Create a boot CD-ROM image'
 endef
 
-CLEAN_FILES += arch/$(ARCH)/boot/fdimage arch/$(ARCH)/boot/mtools.conf
+CLEAN_FILES += arch/$(ARCH)/boot/fdimage \
+	       arch/$(ARCH)/boot/image.iso \
+	       arch/$(ARCH)/boot/mtools.conf
diff --git a/arch/i386/boot/Makefile b/arch/i386/boot/Makefile
index f136752563b..33e55476381 100644
--- a/arch/i386/boot/Makefile
+++ b/arch/i386/boot/Makefile
@@ -62,8 +62,12 @@ $(obj)/setup $(obj)/bootsect: %: %.o FORCE
 $(obj)/compressed/vmlinux: FORCE
 	$(Q)$(MAKE) $(build)=$(obj)/compressed IMAGE_OFFSET=$(IMAGE_OFFSET) $@
 
-# Set this if you want to pass append arguments to the zdisk/fdimage kernel
+# Set this if you want to pass append arguments to the zdisk/fdimage/isoimage kernel
 FDARGS = 
+# Set this if you want an initrd included with the zdisk/fdimage/isoimage kernel
+FDINITRD =
+
+image_cmdline = default linux $(FDARGS) $(if $(FDINITRD),initrd=initrd.img,)
 
 $(obj)/mtools.conf: $(src)/mtools.conf.in
 	sed -e 's|@OBJ@|$(obj)|g' < $< > $@
@@ -72,8 +76,11 @@ $(obj)/mtools.conf: $(src)/mtools.conf.in
 zdisk: $(BOOTIMAGE) $(obj)/mtools.conf
 	MTOOLSRC=$(obj)/mtools.conf mformat a:			; sync
 	syslinux /dev/fd0					; sync
-	echo 'default linux $(FDARGS)' | \
+	echo '$(image_cmdline)' | \
 		MTOOLSRC=$(src)/mtools.conf mcopy - a:syslinux.cfg
+	if [ -f '$(FDINITRD)' ] ; then \
+		MTOOLSRC=$(obj)/mtools.conf mcopy '$(FDINITRD)' a:initrd.img ; \
+	fi
 	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) a:linux	; sync
 
 # These require being root or having syslinux 2.02 or higher installed
@@ -81,18 +88,39 @@ fdimage fdimage144: $(BOOTIMAGE) $(obj)/mtools.conf
 	dd if=/dev/zero of=$(obj)/fdimage bs=1024 count=1440
 	MTOOLSRC=$(obj)/mtools.conf mformat v:			; sync
 	syslinux $(obj)/fdimage					; sync
-	echo 'default linux $(FDARGS)' | \
+	echo '$(image_cmdline)' | \
 		MTOOLSRC=$(obj)/mtools.conf mcopy - v:syslinux.cfg
+	if [ -f '$(FDINITRD)' ] ; then \
+		MTOOLSRC=$(obj)/mtools.conf mcopy '$(FDINITRD)' v:initrd.img ; \
+	fi
 	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) v:linux	; sync
 
 fdimage288: $(BOOTIMAGE) $(obj)/mtools.conf
 	dd if=/dev/zero of=$(obj)/fdimage bs=1024 count=2880
 	MTOOLSRC=$(obj)/mtools.conf mformat w:			; sync
 	syslinux $(obj)/fdimage					; sync
-	echo 'default linux $(FDARGS)' | \
+	echo '$(image_cmdline)' | \
 		MTOOLSRC=$(obj)/mtools.conf mcopy - w:syslinux.cfg
+	if [ -f '$(FDINITRD)' ] ; then \
+		MTOOLSRC=$(obj)/mtools.conf mcopy '$(FDINITRD)' w:initrd.img ; \
+	fi
 	MTOOLSRC=$(obj)/mtools.conf mcopy $(BOOTIMAGE) w:linux	; sync
 
+isoimage: $(BOOTIMAGE)
+	-rm -rf $(obj)/isoimage
+	mkdir $(obj)/isoimage
+	cp `echo /usr/lib*/syslinux/isolinux.bin | awk '{ print $1; }'` \
+		$(obj)/isoimage
+	cp $(BOOTIMAGE) $(obj)/isoimage/linux
+	echo '$(image_cmdline)' > $(obj)/isoimage/isolinux.cfg
+	if [ -f '$(FDINITRD)' ] ; then \
+		cp '$(FDINITRD)' $(obj)/isoimage/initrd.img ; \
+	fi
+	mkisofs -J -r -o $(obj)/image.iso -b isolinux.bin -c boot.cat \
+		-no-emul-boot -boot-load-size 4 -boot-info-table \
+		$(obj)/isoimage
+	rm -rf $(obj)/isoimage
+
 zlilo: $(BOOTIMAGE)
 	if [ -f $(INSTALL_PATH)/vmlinuz ]; then mv $(INSTALL_PATH)/vmlinuz $(INSTALL_PATH)/vmlinuz.old; fi
 	if [ -f $(INSTALL_PATH)/System.map ]; then mv $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi