Improve qemu description, add sample grub.cfg.

debian/control

@@ -184,7 +184,7 @@ Description: GRUB firmware image for QEMU
  In order to make QEMU use this firmware, simply add `-bios grub.bin' when
  invoking it.
  .
- Note: this firmware is only suitable for QEMU.  If you want to install GRUB
- as firmware on real hardware, you can do so in combination with coreboot
- (http://www.coreboot.org/).  To support that, a grub-coreboot package is
- also provided.
+ This package behaves in the same way as GRUB for coreboot, but doesn't
+ contain any code from coreboot itself, and is only suitable for QEMU. If
+ you want to install GRUB as firmware on real hardware, you need to use the
+ grub-coreboot package, and manually combine that with coreboot.

debian/grub-firmware-qemu_grub.cfg

@@ -0,0 +1,37 @@
+set default=0
+set fallback=1
+set timeout=10
+
+menuentry "Search & load /boot/multiboot.img" {
+	search -s -f /boot/multiboot.img
+	if multiboot /boot/multiboot.img ; then
+		boot
+	fi
+	unset timeout
+}
+
+# For separate /boot partition.
+menuentry "Search & load /multiboot.img" {
+	search -s -f /multiboot.img
+	if multiboot /multiboot.img ; then
+		boot
+	fi
+	unset timeout
+}
+
+menuentry "Search & source /boot/grub/grub.cfg" {
+	search -s -f /boot/grub/grub.cfg
+	source /boot/grub/grub.cfg
+	unset timeout
+}
+
+# For separate /boot partition.
+menuentry "Search & source /grub/grub.cfg" {
+	search -s -f /grub/grub.cfg
+	source /grub/grub.cfg
+	unset timeout
+}
+
+menuentry "Reboot" {
+	reboot
+}

debian/rules

@@ -72,13 +72,21 @@ build/grub-rescue-pc:: build/grub-pc
 
 build/grub-firmware-qemu::
 	$(MAKE) -C $@
+	grub_dir=`mktemp -d` ; \
+	grub_memdisk=`mktemp` ; \
+	mkdir -p $${grub_dir}/boot/grub ; \
+	cp debian/grub-firmware-qemu_grub.cfg $${grub_dir}/boot/grub/grub.cfg ; \
+	tar -cf - -C $${grub_dir} boot > $${grub_memdisk} ; \
 	$(CURDIR)/$@/grub-mkimage -d $(CURDIR)/$@ \
 		at_keyboard \
 		ata serial \
 		pc gpt \
 		ext2 iso9660 reiserfs xfs fat tar \
-		normal ls cat help minicmd halt reboot configfile search \
+		normal sh ls cat help minicmd halt reboot configfile sleep search echo \
 		multiboot linux \
+		halt reboot \
+		memdisk \
+		-m $${grub_memdisk} \
 		-o $(CURDIR)/$@/grub.bin
 
 install/grub-pc install/grub-efi-ia32 install/grub-efi-amd64 install/grub-ieee1275 install/grub-coreboot::