#

(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>

#

This file is released under the terms of GPL v2 and any later version.

See the file COPYING in the root directory of the source tree for details.

#

Based on top-level Makefile.

#

include $(SPLDIR)/config.mk
include $(TOPDIR)/include/autoconf.mk
include $(TOPDIR)/include/autoconf.mk.dep

CONFIG_SPL := y
export CONFIG_SPL

TOOLS_DIR := $(TOPDIR)/tools
#链接文件
BOOT0_LDSCRIPT := $(TOPDIR)/sunxi_spl/boot0/main/boot0.lds

We want the final binaries in this directory

obj := $(OBJTREE)/sunxi_spl/boot0/

BOOT0_HEAD := sunxi_spl/boot0/boot0_head.o
START := sunxi_spl/boot0/boot0_entry.o

LIBS-y += sunxi_spl/boot0/spl/libsource_spl.o
LIBS-y += sunxi_spl/boot0/main/libmain.o
LIBS-y += sunxi_spl/boot0/libs/libgeneric.o
#看文件目录的make文件
LIBS-y += sunxi_spl/spl/lib/libgeneric.o

#目录---u-boot-2014.07\arch\arm\cpu\arm926ejs\sunivw1p1\dram-----------------
LIBS-y += arch/$(ARCH)/cpu/$(CPU)/$(SOC)/dram/libdram.o
LIBS-$(CONFIG_SUNXI_CHIPID) += arch/$(ARCH)/cpu/$(CPU)/$(SOC)/dram/libchipid.o
LIBS := $(addprefix $(OBJTREE)/,$(sort $(LIBS-y)))

#可以不要nand闪存的设备库
LIBNAND-$(CONFIG_STORAGE_MEDIA_NAND) += sunxi_spl/boot0/load_nand/libloadnand.o
LIBNAND-$(CONFIG_STORAGE_MEDIA_NAND) += arch/$(ARCH)/cpu/$(CPU)/$(SOC)/nand/libnand.o

LIBNAND := $(addprefix $(OBJTREE)/,$(sort $(LIBNAND-y)))

#可以不要SD卡闪存的设备库
LIBMMC-$(CONFIG_STORAGE_MEDIA_MMC) += sunxi_spl/boot0/load_mmc/libloadmmc.o
LIBMMC-$(CONFIG_STORAGE_MEDIA_MMC) += arch/$(ARCH)/cpu/$(CPU)/$(SOC)/mmc/libmmc.o

LIBMMC := $(addprefix $(OBJTREE)/,$(sort $(LIBMMC-y)))

#这个需要
LIBSPINOR-$(CONFIG_STORAGE_MEDIA_SPINOR) += sunxi_spl/boot0/load_spinor/libloadspinor.o
LIBSPINOR-$(CONFIG_STORAGE_MEDIA_SPINOR) += arch/$(ARCH)/cpu/$(CPU)/$(SOC)/spinor/libspinor.o

LIBSPINOR := $(addprefix $(OBJTREE)/,$(sort $(LIBSPINOR-y)))

__LIBS := $(subst $(obj),,$(LIBS))

Special flags for CPP when processing the linker script.

Pass the version down so we can handle backwards compatibility

on the fly.

LDPPFLAGS += \
-include $(TOPDIR)/include/u-boot/u-boot.lds.h \
-DBOOT0ADDR=$(CONFIG_BOOT0_RUN_ADDR) \
$(shell $(LD) --version | \
sed -ne 's/GNU ld version \([0-9][0-9]\)\.\([0-9][0-9]\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')

ALL-$(CONFIG_STORAGE_MEDIA_NAND) += $(obj)boot0_nand.bin
ALL-$(CONFIG_STORAGE_MEDIA_MMC) += $(obj)boot0_sdcard.bin
ALL-$(CONFIG_STORAGE_MEDIA_SPINOR) += $(obj)boot0_spinor.bin

all: $(ALL-y)

$(obj)boot0_nand.bin: $(obj)boot0_nand.axf
@echo bootaddr is $(CONFIG_BOOT0_RUN_ADDR)
$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@

$(obj)boot0_nand.axf: $(LIBS) $(LIBNAND) $(obj)boot0.lds
$(LD) $(LIBS) $(LIBNAND) $(PLATFORM_LIBGCC) $(LDFLAGS) -T$(obj)boot0.lds -o boot0_nand.axf -Map boot0_nand.map

$(obj)boot0_sdcard.bin: $(obj)boot0_sdcard.axf
$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@

$(obj)boot0_sdcard.axf: $(LIBS) $(LIBMMC) $(obj)boot0.lds
$(LD) $(LIBS) $(LIBMMC) $(PLATFORM_LIBGCC) $(LDFLAGS) -T$(obj)boot0.lds -o boot0_sdcard.axf -Map boot0_sdcard.map

$(obj)boot0_spinor.bin: $(obj)boot0_spinor.axf
$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@

$(obj)boot0_spinor.axf: $(LIBS) $(LIBSPINOR) $(obj)boot0.lds
$(LD) $(LIBS) $(LIBSPINOR) $(PLATFORM_LIBGCC) $(LDFLAGS) -T$(obj)boot0.lds -o boot0_spinor.axf -Map boot0_spinor.map

$(LIBS): depend
$(MAKE) -C $(SRCTREE)$(dir $(subst $(OBJTREE),,$@))

$(LIBNAND): depend
$(MAKE) -C $(SRCTREE)$(dir $(subst $(OBJTREE),,$@))

$(LIBMMC): depend
$(MAKE) -C $(SRCTREE)$(dir $(subst $(OBJTREE),,$@))

$(LIBSPINOR): depend
$(MAKE) -C $(SRCTREE)$(dir $(subst $(OBJTREE),,$@))

$(obj)boot0.lds: $(BOOT0_LDSCRIPT)
@$(CPP) $(ALL_CFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$^ >$@

depend: .depend
#########################################################################

defines $(obj).depend target

include $(SRCTREE)/rules.mk

sinclude .depend

#########################################################################