#
  # (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

  CONFIG_SPL_BUILD := y
  export CONFIG_SPL_BUILD

  KBUILD_CPPFLAGS += -DCONFIG_SPL_BUILD
  ifeq ($(CONFIG_TPL_BUILD),y)
  KBUILD_CPPFLAGS += -DCONFIG_TPL_BUILD
  endif
  
  # Enable garbage collection of un-used sections for SPL
  KBUILD_CFLAGS += -ffunction-sections -fdata-sections
  LDFLAGS_FINAL += --gc-sections

  ifeq ($(CONFIG_TPL_BUILD),y)
  export CONFIG_TPL_BUILD
  SPL_BIN := u-boot-tpl
  else
  SPL_BIN := u-boot-spl
  endif

  include include/config.mk
  
  ifeq ($(CONFIG_TPL_BUILD),y)
    -include include/tpl-autoconf.mk
  else
    -include include/spl-autoconf.mk
  endif

  include $(TOPDIR)/config.mk

  HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)

  ifdef	CONFIG_SPL_START_S_PATH

  START_PATH := $(CONFIG_SPL_START_S_PATH:"%"=%)

  else
  START_PATH := $(CPUDIR)
  endif

  head-y := $(START_PATH)/start.o
  head-$(CONFIG_X86) += $(START_PATH)/start16.o $(START_PATH)/resetvec.o
  head-$(CONFIG_4xx) += $(START_PATH)/resetvec.o
  head-$(CONFIG_MPC85xx) += $(START_PATH)/resetvec.o

  LIBS-y += arch/$(ARCH)/lib/

  LIBS-y += $(CPUDIR)/

  ifdef SOC

  LIBS-y += $(CPUDIR)/$(SOC)/
  endif
  LIBS-y += 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_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-$(CONFIG_SPL_SERIAL_SUPPORT) += drivers/serial/
  LIBS-$(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-$(if $(CONFIG_CMD_NAND),$(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/

  ifneq (,$(CONFIG_MX23)$(CONFIG_MX35)$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35))

  LIBS-y += arch/$(ARCH)/imx-common/

  endif

  LIBS-$(CONFIG_ARM) += arch/arm/cpu/
  LIBS-$(CONFIG_PPC) += arch/powerpc/cpu/

  LIBS-y := $(patsubst %/, %/built-in.o, $(LIBS-y))

  # Add GCC lib
  ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")

  PLATFORM_LIBS := $(SPLTREE)/arch/$(ARCH)/lib/lib.a

  endif

  LIBS-y := $(sort $(LIBS-y))
  
  __START := $(head-y)
  __LIBS := $(LIBS-y)

  START := $(addprefix $(obj)/,$(head-y))
  LIBS := $(addprefix $(obj)/,$(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 := $(TOPDIR)/board/$(BOARDDIR)/u-boot-spl.lds
  endif
  ifeq ($(wildcard $(LDSCRIPT)),)
  	LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-spl.lds
  endif
  ifeq ($(wildcard $(LDSCRIPT)),)

  	LDSCRIPT := $(TOPDIR)/arch/$(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 $(TOPDIR)/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')

  $(OBJTREE)/MLO:	$(obj)/u-boot-spl.bin

  	$(OBJTREE)/tools/mkimage -T omapimage \
  		-a $(CONFIG_SPL_TEXT_BASE) -d $< $@

  $(OBJTREE)/MLO.byteswap: $(obj)/u-boot-spl.bin

  	$(OBJTREE)/tools/mkimage -T omapimage -n byteswap \

  		-a $(CONFIG_SPL_TEXT_BASE) -d $< $@

  $(objtree)/SPL : $(obj)/u-boot-spl.bin

  		$(MAKE) $(build)=spl/arch/arm/imx-common $@

  ALL-y	+= $(obj)/$(SPL_BIN).bin

  ifdef CONFIG_SAMSUNG

  ALL-y	+= $(obj)/$(BOARD)-spl.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

  $(obj)/$(SPL_BIN).bin:	$(obj)/$(SPL_BIN)

  	$(OBJCOPY) $(OBJCFLAGS) $(SPL_OBJCFLAGS) -O binary $< $@

  LDFLAGS_$(SPL_BIN) += -T u-boot-spl.lds $(LDFLAGS_FINAL)

  ifneq ($(CONFIG_SPL_TEXT_BASE),)
  LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
  endif

  GEN_UBOOT = \

  	cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $(__START) \

  		--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \

  		-Map $(SPL_BIN).map -o $(SPL_BIN)

  $(obj)/$(SPL_BIN): $(START) $(LIBS) $(obj)/u-boot-spl.lds

  	$(GEN_UBOOT)

  $(START):
  	@:

  $(LIBS):
  	$(Q)$(MAKE) $(build)=$(patsubst %/,%,$(dir $@))

  # FIX ME
  cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)

  $(obj)/u-boot-spl.lds: $(LDSCRIPT) FORCE
  	$(CPP) $(cpp_flags) $(LDPPFLAGS) -I$(obj). -ansi -D__ASSEMBLY__ -P - < $< > $@

  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)