#
# (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 $(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)