Hi,
I am trying to build one configuration blob which should be included in SPL. And still I didn't find the right way how to do it.
I need to build C file just as object and run objcopy -O binary. I can be done with host gcc or target gcc. Both of them are little endian that's why it shouldn't be a problem.
I just created rules in Makefile
OBJCOPYFLAGS := -O binary KBUILD_CFLAGS := -nostdlib -nostartfiles -nodefaultlibs
$(obj)/%.bin: $(obj)/%.o FORCE $(call if_changed,objcopy)
obj-y += pm_obj.bin
binary is generated properly but I have a problem to setup dependency.
The same file is referenced via CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE and should be included in pm_cfg_obj.o as the part of SPL.
This is the rule (a little bit update compare to version upstream) ifneq ($(CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE),"") PM_CFG_OBJ_FILE := $(shell cd $(srctree); readlink -f $(CONFIG_ZYNQMP_SPL_PM_CFG_OBJ_FILE)) obj-$(CONFIG_SPL_BUILD) += pm_cfg_obj.o $(obj)/pm_cfg_obj.o: $(PM_CFG_OBJ_FILE) FORCE endif
And there is dependency on binary file but I think my issue is that pm_obj.bin is not listed in targets that's why that dependency is not handled properly.
Would be good to get some hints how to do it properly.
It is PMU fw configuration blob which PMUFW requires to setup proper permission for IPs that I think it would be good to have generic version of this file in u-boot source code that it doesn't need to be created outside of u-boot. At the end there is new option for applying configuration object overlays which will bring new functionality later in boot process that's why generic configuration could work for the most of boards. And if not additional binary could be applied via existing zynqmp pmufw command.
Thanks, Michal