#
  # (C) Copyright 2000-2011
  # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  #
  # (C) Copyright 2011
  # Daniel Schwierzeck, daniel.schwierzeck@googlemail.com.
  #
  # (C) Copyright 2011
  # Texas Instruments Incorporated - http://www.ti.com/
  # Aneesh V <aneesh@ti.com>
  #
  # SPDX-License-Identifier:	GPL-2.0+
  #
  # Based on top-level Makefile.
  #
  
  src := $(obj)
  
  # Create output directory if not already present
  _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
  
  include $(srctree)/scripts/Kbuild.include
  
  -include include/config/auto.conf
  -include $(obj)/include/autoconf.mk
  
  KBUILD_CPPFLAGS += -DCONFIG_SPL_BUILD
  ifeq ($(CONFIG_TPL_BUILD),y)
  KBUILD_CPPFLAGS += -DCONFIG_TPL_BUILD
  endif
  
  ifeq ($(CONFIG_TPL_BUILD),y)
  SPL_BIN := u-boot-tpl
  else
  SPL_BIN := u-boot-spl
  endif
  
  include $(srctree)/config.mk
  include $(srctree)/arch/$(ARCH)/Makefile
  
  # Enable garbage collection of un-used sections for SPL
  KBUILD_CFLAGS += -ffunction-sections -fdata-sections
  LDFLAGS_FINAL += --gc-sections
  
  # FIX ME
  cpp_flags := $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) $(UBOOTINCLUDE) \
  							$(NOSTDINC_FLAGS)
  
  HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(srctree)/board/$(VENDOR)/common/Makefile),y,n)
  
  libs-y += $(if $(BOARDDIR),board/$(BOARDDIR)/)
  libs-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/
  
  libs-$(CONFIG_SPL_FRAMEWORK) += common/spl/
  libs-$(CONFIG_SPL_LIBCOMMON_SUPPORT) += common/
  libs-$(CONFIG_SPL_LIBDISK_SUPPORT) += disk/
  libs-$(CONFIG_SPL_DM) += drivers/core/
  libs-$(CONFIG_SPL_I2C_SUPPORT) += drivers/i2c/
  libs-$(CONFIG_SPL_GPIO_SUPPORT) += drivers/gpio/
  libs-$(CONFIG_SPL_MMC_SUPPORT) += drivers/mmc/
  libs-$(CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT) += drivers/ddr/fsl/
  libs-$(CONFIG_SYS_MVEBU_DDR) += drivers/ddr/mvebu/
  libs-$(CONFIG_SPL_SERIAL_SUPPORT) += drivers/serial/
  libs-$(CONFIG_SPL_SPI_FLASH_SUPPORT) += drivers/mtd/spi/
  libs-$(CONFIG_SPL_SPI_SUPPORT) += drivers/spi/
  libs-y += fs/
  libs-$(CONFIG_SPL_LIBGENERIC_SUPPORT) += lib/
  libs-$(CONFIG_SPL_POWER_SUPPORT) += drivers/power/ drivers/power/pmic/
  libs-$(CONFIG_SPL_MTD_SUPPORT) += drivers/mtd/
  libs-$(CONFIG_SPL_NAND_SUPPORT) += drivers/mtd/nand/
  libs-$(CONFIG_SPL_DRIVERS_MISC_SUPPORT) += drivers/misc/
  libs-$(CONFIG_SPL_ONENAND_SUPPORT) += drivers/mtd/onenand/
  libs-$(CONFIG_SPL_DMA_SUPPORT) += drivers/dma/
  libs-$(CONFIG_SPL_POST_MEM_SUPPORT) += post/drivers/
  libs-$(CONFIG_SPL_NET_SUPPORT) += net/
  libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/
  libs-$(CONFIG_SPL_ETH_SUPPORT) += drivers/net/phy/
  libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/net/phy/
  libs-$(CONFIG_SPL_MUSB_NEW_SUPPORT) += drivers/usb/musb-new/
  libs-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/usb/gadget/
  libs-$(CONFIG_SPL_WATCHDOG_SUPPORT) += drivers/watchdog/
  libs-$(CONFIG_SPL_USB_HOST_SUPPORT) += drivers/usb/host/
  libs-$(CONFIG_OMAP_USB_PHY) += drivers/usb/phy/
  libs-$(CONFIG_SPL_SATA_SUPPORT) += drivers/block/
  
  head-y		:= $(addprefix $(obj)/,$(head-y))
  libs-y		:= $(addprefix $(obj)/,$(libs-y))
  u-boot-spl-dirs	:= $(patsubst %/,%,$(filter %/, $(libs-y)))
  
  libs-y := $(patsubst %/, %/built-in.o, $(libs-y))
  
  # Add GCC lib
  ifeq ($(CONFIG_USE_PRIVATE_LIBGCC),y)
  PLATFORM_LIBGCC = arch/$(ARCH)/lib/lib.a
  PLATFORM_LIBS := $(filter-out %/lib.a, $(filter-out -lgcc, $(PLATFORM_LIBS))) $(PLATFORM_LIBGCC)
  endif
  
  u-boot-spl-init := $(head-y)
  u-boot-spl-main := $(libs-y)
  
  # Linker Script
  ifdef CONFIG_SPL_LDSCRIPT
  # need to strip off double quotes
  LDSCRIPT := $(addprefix $(srctree)/,$(CONFIG_SPL_LDSCRIPT:"%"=%))
  endif
  
  ifeq ($(wildcard $(LDSCRIPT)),)
  	LDSCRIPT := $(srctree)/board/$(BOARDDIR)/u-boot-spl.lds
  endif
  ifeq ($(wildcard $(LDSCRIPT)),)
  	LDSCRIPT := $(srctree)/$(CPUDIR)/u-boot-spl.lds
  endif
  ifeq ($(wildcard $(LDSCRIPT)),)
  	LDSCRIPT := $(srctree)/arch/$(ARCH)/cpu/u-boot-spl.lds
  endif
  ifeq ($(wildcard $(LDSCRIPT)),)
  $(error could not find linker script)
  endif
  
  # Special flags for CPP when processing the linker script.
  # Pass the version down so we can handle backwards compatibility
  # on the fly.
  LDPPFLAGS += \
  	-include $(srctree)/include/u-boot/u-boot.lds.h \
  	-include $(objtree)/include/config.h \
  	-DCPUDIR=$(CPUDIR) \
  	$(shell $(LD) --version | \
  	  sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
  
  quiet_cmd_mkimage = MKIMAGE $@
  cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
  	$(if $(KBUILD_VERBOSE:1=), >/dev/null)
  
  MKIMAGEFLAGS_MLO = -T omapimage -a $(CONFIG_SPL_TEXT_BASE)
  
  MKIMAGEFLAGS_MLO.byteswap = -T omapimage -n byteswap -a $(CONFIG_SPL_TEXT_BASE)
  
  MLO MLO.byteswap: $(obj)/u-boot-spl.bin
  	$(call if_changed,mkimage)
  
  MKIMAGEFLAGS_boot.bin = -T atmelimage
  
  ifeq ($(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER),y)
  MKIMAGEFLAGS_boot.bin += -n $(shell $(obj)/../tools/atmel_pmecc_params)
  
  boot.bin: $(obj)/../tools/atmel_pmecc_params
  endif
  
  boot.bin: $(obj)/u-boot-spl.bin
  	$(call if_changed,mkimage)
  
  ALL-y	+= $(obj)/$(SPL_BIN).bin
  
  ifdef CONFIG_SAMSUNG
  ALL-y	+= $(obj)/$(BOARD)-spl.bin
  endif
  
  ifdef CONFIG_SUNXI
  ALL-y	+= $(obj)/sunxi-spl.bin
  endif
  
  ifeq ($(CONFIG_SYS_SOC),"at91")
  ALL-y	+= boot.bin
  endif
  
  all:	$(ALL-y)
  
  ifdef CONFIG_SAMSUNG
  ifdef CONFIG_VAR_SIZE_SPL
  VAR_SIZE_PARAM = --vs
  else
  VAR_SIZE_PARAM =
  endif
  $(obj)/$(BOARD)-spl.bin: $(obj)/u-boot-spl.bin
  	$(if $(wildcard $(objtree)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl),\
  	$(objtree)/spl/board/samsung/$(BOARD)/tools/mk$(BOARD)spl,\
  	$(objtree)/tools/mkexynosspl) $(VAR_SIZE_PARAM) $< $@
  endif
  
  quiet_cmd_objcopy = OBJCOPY $@
  cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
  
  OBJCOPYFLAGS_$(SPL_BIN).bin = $(SPL_OBJCFLAGS) -O binary
  
  $(obj)/$(SPL_BIN).bin: $(obj)/$(SPL_BIN) FORCE
  	$(call if_changed,objcopy)
  
  LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)
  ifneq ($(CONFIG_SPL_TEXT_BASE),)
  LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
  endif
  
  ifdef CONFIG_SUNXI
  quiet_cmd_mksunxiboot = MKSUNXI $@
  cmd_mksunxiboot = $(objtree)/tools/mksunxiboot $< $@
  $(obj)/sunxi-spl.bin: $(obj)/$(SPL_BIN).bin
  	$(call if_changed,mksunxiboot)
  endif
  
  quiet_cmd_u-boot-spl = LD      $@
        cmd_u-boot-spl = (cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) \
  		       $(patsubst $(obj)/%,%,$(u-boot-spl-init)) --start-group \
  		       $(patsubst $(obj)/%,%,$(u-boot-spl-main)) --end-group \
  		       $(PLATFORM_LIBS) -Map $(SPL_BIN).map -o $(SPL_BIN))
  
  $(obj)/$(SPL_BIN): $(u-boot-spl-init) $(u-boot-spl-main) $(obj)/u-boot-spl.lds FORCE
  	$(call if_changed,u-boot-spl)
  
  $(sort $(u-boot-spl-init) $(u-boot-spl-main)): $(u-boot-spl-dirs) ;
  
  PHONY += $(u-boot-spl-dirs)
  $(u-boot-spl-dirs):
  	$(Q)$(MAKE) $(build)=$@
  
  quiet_cmd_cpp_lds = LDS     $@
  cmd_cpp_lds = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \
  		-D__ASSEMBLY__ -x assembler-with-cpp -P -o $@ $<
  
  $(obj)/u-boot-spl.lds: $(LDSCRIPT) FORCE
  	$(call if_changed_dep,cpp_lds)
  
  # read all saved command lines
  
  targets := $(wildcard $(sort $(targets)))
  cmd_files := $(wildcard $(obj)/.*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
  
  ifneq ($(cmd_files),)
    $(cmd_files): ;	# Do not try to update included dependency files
    include $(cmd_files)
  endif
  
  PHONY += FORCE
  FORCE:
  
  # Declare the contents of the .PHONY variable as phony.  We keep that
  # information in a variable so we can use it in if_changed and friends.
  .PHONY: $(PHONY)