Makefile: add support to generate LZMA compressed u-boot image

This patch adds support for generating LZMA compressed u-boot image.
The compressed image can be used for SPL to reduce the size of the u-boot
binary.

Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

diff --git a/Makefile b/Makefile
index b8a4b5058a00f92d061e9823f6842a40273dbb26..ea62374e74f744cdd1c3207bef23ae9e9e1eca3b 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1002,6 +1002,9 @@ append = cat $(filter-out $< $(PHONY), $^) >> $@
 quiet_cmd_pad_cat = CAT     $@
 cmd_pad_cat = $(cmd_objcopy) && $(append) || rm -f $@
 
+quiet_cmd_lzma = LZMA    $@
+cmd_lzma = lzma -c -z -k -9 $< > $@
+
 cfg: u-boot.cfg
 
 quiet_cmd_cfgcheck = CFGCHK  $2
@@ -1384,6 +1387,16 @@ else
 UBOOT_BIN := u-boot.bin
 endif
 
+MKIMAGEFLAGS_u-boot-lzma.img = -A $(ARCH) -T standalone -C lzma -O u-boot \
+       -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
+       -n "U-Boot $(UBOOTRELEASE) for $(BOARD) board"
+
+u-boot.bin.lzma: u-boot.bin FORCE
+       $(call if_changed,lzma)
+
+u-boot-lzma.img: u-boot.bin.lzma FORCE
+       $(call if_changed,mkimage)
+
 u-boot-dtb.img u-boot.img u-boot.kwb u-boot.pbl u-boot-ivt.img: \
                $(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin \
                        $(if $(CONFIG_OF_SEPARATE)$(CONFIG_OF_EMBED)$(CONFIG_OF_HOSTFILE),dts/dt.dtb) \