[U-Boot] [PATCH 5/7] Makefile: Add u-boot.spr build target (SPEAr)

[Stefan Roese]

On x600 (SPEAr600) U-Boot is appended to U-Boot SPL. Both images are
created using mkimage (crc etc), so that the ROM bootloader can check
its integrity. Padding needs to be done to the SPL image (with
mkimage header) and not the binary. Otherwise the resulting image
which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
The resulting image containing both U-Boot images is called u-boot.spr.

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Amit Virdi <amit.virdi at st.com>
Cc: Vipin Kumar <vipin.kumar at st.com>
---
 Makefile  |   17 +++++++++++++++++
 config.mk |    4 ++++
 2 files changed, 21 insertions(+)

diff --git a/Makefile b/Makefile
index 023ea23..b177032 100644
--- a/Makefile
+++ b/Makefile
@@ -453,6 +453,22 @@ $(obj)u-boot.sb:       $(obj)u-boot.bin $(obj)spl/u-boot-spl.bin
 		elftosb -zdf imx28 -c $(TOPDIR)/board/$(BOARDDIR)/u-boot.bd \
 			-o $(obj)u-boot.sb
 
+# On x600 (SPEAr600) U-Boot is appended to U-Boot SPL.
+# Both images are created using mkimage (crc etc), so that the ROM
+# bootloader can check its integrity. Padding needs to be done to the
+# SPL image (with mkimage header) and not the binary. Otherwise the resulting image
+# which is loaded/copied by the ROM bootloader to SRAM doesn't fit.
+# The resulting image containing both U-Boot images is called u-boot.spr
+$(obj)u-boot.spr:	$(obj)u-boot.img $(obj)spl/u-boot-spl.bin
+		$(obj)tools/mkimage -A $(ARCH) -T firmware -C none \
+		-a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) -n XLOADER \
+		-d $(obj)spl/u-boot-spl.bin $(obj)spl/u-boot-spl.img
+		tr "\000" "\377" < /dev/zero | dd ibs=1 count=$(CONFIG_SPL_PAD_TO) \
+			of=$(obj)spl/u-boot-spl-pad.img 2>/dev/null
+		dd if=$(obj)spl/u-boot-spl.img of=$(obj)spl/u-boot-spl-pad.img \
+			conv=notrunc 2>/dev/null
+		cat $(obj)spl/u-boot-spl-pad.img $(obj)u-boot.img > $@
+
 ifeq ($(CONFIG_SANDBOX),y)
 GEN_UBOOT = \
 		cd $(LNDIR) && $(CC) $(SYMS) -T $(obj)u-boot.lds \
@@ -765,6 +781,7 @@ clobber:	tidy
 	@rm -f $(obj)u-boot.ais
 	@rm -f $(obj)u-boot.dtb
 	@rm -f $(obj)u-boot.sb
+	@rm -f $(obj)u-boot.spr
 	@rm -f $(obj)tools/inca-swap-bytes
 	@rm -f $(obj)arch/powerpc/cpu/mpc824x/bedbug_603e.c
 	@rm -f $(obj)arch/powerpc/cpu/mpc83xx/ddr-gen?.c
diff --git a/config.mk b/config.mk
index fa33e62..29e2380 100644
--- a/config.mk
+++ b/config.mk
@@ -201,6 +201,10 @@ ifneq ($(CONFIG_SPL_TEXT_BASE),)
 CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
 endif
 
+ifneq ($(CONFIG_SPL_PAD_TO),)
+CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
+endif
+
 ifeq ($(CONFIG_SPL_BUILD),y)
 CPPFLAGS += -DCONFIG_SPL_BUILD
 endif
-- 
1.7.10.1