U-Boot can be booted from NAND without SPL by prepending the DCD header to the actual U-Boot binary. However this requires prepending 1024 bytes to u-boot.imx (DCD + u-boot.bin).
There is already a similar target to build spl/u-boot-nand-spl.imx, add the same option for no-SPL boot.
Tested on i.MX6ULL.
The resulting layout of u-boot-nand.imx is:
- Offset 0x0000 (0 KiB): padding - Offset 0x0400 (1 KiB): DCD header - Offset 0x1000 (4 KiB): u-boot.bin
Signed-off-by: Luca Ceresoli luca.ceresoli@bootlin.com --- Makefile | 3 +++ arch/arm/mach-imx/Makefile | 6 ++++++ 2 files changed, 9 insertions(+)
diff --git a/Makefile b/Makefile index e760bacf9451..db124476d6e6 100644 --- a/Makefile +++ b/Makefile @@ -1522,6 +1522,9 @@ endif u-boot.uim: u-boot.bin FORCE $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
+u-boot-nand.imx: u-boot.imx FORCE + $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@ + u-boot-with-spl.imx u-boot-with-nand-spl.imx: SPL $(if $(CONFIG_OF_SEPARATE),u-boot.img,u-boot.uim) FORCE $(Q)$(MAKE) $(build)=arch/arm/mach-imx $@
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 4dfc60eedc43..c386132dacd1 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -132,6 +132,12 @@ u-boot.imx: MKIMAGEOUTPUT = u-boot.imx.log u-boot.imx: u-boot.bin u-boot.cfgout $(PLUGIN).bin FORCE $(call if_changed,mkimage)
+quiet_cmd_u-boot-nand_imx = GEN $@ +cmd_u-boot-nand_imx = (dd bs=1024 count=1 if=/dev/zero 2>/dev/null) | cat - $< > $@ + +u-boot-nand.imx: u-boot.imx FORCE + $(call if_changed,u-boot-nand_imx) + ifeq ($(CONFIG_MULTI_DTB_FIT),y) MKIMAGEFLAGS_u-boot-dtb.imx = -n $(filter-out $(PLUGIN).bin $< $(PHONY),$^) \ -T $(IMAGE_TYPE) -e $(CONFIG_TEXT_BASE)