cdrom: Install GRUB into EFI image

This will start GRUB on EFI systems when booting from CD

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

config/cdrom/grub-efi.cfg

@@ -0,0 +1,2 @@
+search --file --no-floppy --set=root /EFI/BOOT/grub.cfg
+set prefix=($root)/EFI/BOOT/

lfs/Config

@@ -82,8 +82,63 @@ CCACHE_COMPILERCHECK += $(shell gcc -dumpspecs 2>/dev/null | md5sum | cut -d ' '
 # We support EFI on x86_64
 ifeq "$(BUILD_ARCH)" "x86_64"
 	EFI = 1
+	EFI_ARCH = x64
 endif
 
+# Basic modules
+GRUB_EFI_MODULES = \
+	configfile \
+	efi_gop \
+	efi_uga \
+	gzio \
+	linux \
+	loadbios \
+	loadenv \
+	normal \
+	regexp
+
+# Stuff for accessing file systems
+GRUB_EFI_MODULES += \
+	ahci \
+	ext2 \
+	fat \
+	iso9660 \
+	part_gpt \
+	part_msdos \
+	udf
+
+# Graphics & IO
+GRUB_EFI_MODULES += \
+	all_video \
+	at_keyboard \
+	bitmap_scale \
+	font \
+	gfxmenu \
+	gfxterm \
+	jpeg \
+	png \
+	tga \
+	usb_keyboard
+
+# Commands
+GRUB_EFI_MODULES += \
+	boot \
+	cat \
+	chain \
+	echo \
+	halt \
+	help \
+	ls \
+	minicmd \
+	probe \
+	reboot \
+	search \
+	search_fs_file \
+	search_fs_uuid \
+	search_label \
+	test \
+	true
+
 ###############################################################################
 # Common Macro Definitions
 ###############################################################################

lfs/cdrom

@@ -119,12 +119,34 @@ ifneq "$(BUILD_PLATFORM)" "arm"
 	cp /usr/lib/memtest86+/memtest.bin          /install/cdrom/boot/isolinux/memtest
 	cp /usr/share/ipfire-netboot/ipxe.lkrn      /install/cdrom/boot/isolinux/netboot
 	cp /usr/share/syslinux/isolinux.bin         /install/cdrom/boot/isolinux/isolinux.bin
+
 ifeq "$(EFI)" "1"
+	# Create the EFI Eltorito image
 	dd if=/dev/zero of=/install/cdrom/boot/isolinux/efiboot.img bs=1k count=1440
 	mkdosfs -F 12 -n "IPFIRE_EFI" /install/cdrom/boot/isolinux/efiboot.img
 
-	# XXX Some bootloader needs to be put in this image
+	# Build a GRUB EFI image
+	grub-mkimage \
+		--format=$(BUILD_ARCH)-efi \
+		--output=/tmp/boot$(EFI_ARCH).efi \
+		--config=$(DIR_SRC)/config/cdrom/grub-efi.cfg \
+		--compression=xz \
+		--prefix=/EFI/BOOT \
+		$(GRUB_EFI_MODULES)
+
+	# Mount the EFI image
+	mkdir -pv /install/efiboot.img
+	mount -o loop /install/cdrom/boot/isolinux/efiboot.img /install/efiboot.img
+
+	# Copy the bootloader into the image
+	mkdir -pv /install/efiboot.img/EFI/BOOT
+	cp -a /tmp/boot$(EFI_ARCH).efi /install/efiboot.img/EFI/BOOT/boot$(EFI_ARCH).efi
+
+	# Cleanup
+	umount /install/efiboot.img
+	rm -rf /install/efiboot.img /tmp/boot$(EFI_ARCH).efi
 endif
+
 	cp /usr/share/hwdata/pci.ids                /install/cdrom/boot/isolinux/pci.ids
 	cp -vf /usr/share/syslinux/*.c32            /install/cdrom/boot/isolinux/
 	sed -e "s/VERSION/$(VERSION) - Core $(CORE)/g" \