[Buildroot] [PATCH v4 4/7] boot/uboot: Generate BOOT.BIN file when building for Xilinx Zynq

[Jan Viktorin <viktorin@rehivetech.com>]

This commit integrates generation of a bootable image
for Xilinx Zynq. The generation is independent on Xilinx
flow and utilizes the host-zynq-boot-bin package. The only
required step is to generate a proper U-Boot SPL (instead
of the FSBL).

The SPL generation might work when providing the working
ps7_init.c file to U-Boot. However, from U-Boot 2015.07
a set of generic ps7_init.c files is included and used to
build the U-Boot SPL for various boards. The ps7_init.c file
has been released under GNU/GPL license for this purpose.
For details, see

http://lists.denx.de/pipermail/u-boot/2015-April/210664.html

The SPL searchs for u-boot-dtb.img when booting so we
enforce using of the BR2_TARGET_UBOOT_FORMAT_DTB_IMG format.

Signed-off-by: Jan Viktorin <viktorin@rehivetech.com>
---
 boot/uboot/Config.in | 13 +++++++++++++
 boot/uboot/uboot.mk  | 10 ++++++++++
 2 files changed, 23 insertions(+)

diff --git a/boot/uboot/Config.in b/boot/uboot/Config.in
index 0554544..420573e 100644
--- a/boot/uboot/Config.in
+++ b/boot/uboot/Config.in
@@ -272,6 +272,19 @@ config BR2_TARGET_UBOOT_SPL_NAME
 	  u-boot build. For most platform it is spl/u-boot-spl.bin
 	  but not always. It is MLO on OMAP for example.
 
+config BR2_TARGET_UBOOT_ZYNQ_IMAGE
+	bool "Generate image for Xilinx Zynq"
+	depends on BR2_arm
+	depends on BR2_TARGET_UBOOT_SPL
+	depends on BR2_TARGET_UBOOT_FORMAT_DTB_IMG
+	select BR2_PACKAGE_HOST_ZYNQ_BOOT_BIN
+	help
+	 Generate the BOOT.BIN file from U-Boot's SPL. The image
+	 boots the Xilinx Zynq chip without any FPGA bitstream.
+	 A bitstream can be loaded by the U-Boot. The SPL searchs
+	 for u-boot-dtb.img file so this U-Boot format is required
+	 to be set.
+
 menuconfig BR2_TARGET_UBOOT_ENVIMAGE
 	bool "Environment image"
 	help
diff --git a/boot/uboot/uboot.mk b/boot/uboot/uboot.mk
index e064a8e..b51bf56 100644
--- a/boot/uboot/uboot.mk
+++ b/boot/uboot/uboot.mk
@@ -182,6 +182,16 @@ UBOOT_POST_BUILD_HOOKS += UBOOT_BUILD_OMAP_IFT
 UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_INSTALL_OMAP_IFT_IMAGE
 endif
 
+ifeq ($(BR2_TARGET_UBOOT_ZYNQ_IMAGE),y)
+define UBOOT_GENERATE_ZYNQ_IMAGE
+	$(HOST_DIR)/usr/bin/python2 $(HOST_DIR)/usr/bin/zynq-boot-bin.py \
+		-u $(@D)/$(call qstrip,$(BR2_TARGET_UBOOT_SPL_NAME))     \
+		-o $(BINARIES_DIR)/BOOT.BIN
+endef
+UBOOT_DEPENDENCIES += host-zynq-boot-bin
+UBOOT_POST_INSTALL_IMAGES_HOOKS += UBOOT_GENERATE_ZYNQ_IMAGE
+endif
+
 ifeq ($(BR2_TARGET_UBOOT_ENVIMAGE),y)
 ifeq ($(BR_BUILDING),y)
 ifeq ($(call qstrip,$(BR2_TARGET_UBOOT_ENVIMAGE_SOURCE)),)
-- 
2.4.5




-- 
   Jan Viktorin                  E-mail: Viktorin at RehiveTech.com
   System Architect              Web:    www.RehiveTech.com
   RehiveTech                    Phone:  +420 606 201 868
   Brno, Czech Republic