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https://github.com/AsahiLinux/u-boot
synced 2024-11-24 21:54:01 +00:00
dts: re-write dts/Makefile more simply with Kbuild
Useful rules in scripts/Makefile.lib allows us to easily generate a device tree blob and wrap it in assembly code. We do not need to parse a linker script to get output format and arch. This commit deletes ./u-boot.dtb since it is a copy of dts/dt.dtb. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
This commit is contained in:
parent
babb4440cf
commit
6ab6b2afa0
10 changed files with 42 additions and 73 deletions
1
.gitignore
vendored
1
.gitignore
vendored
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@ -48,7 +48,6 @@
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/u-boot.lds
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/u-boot.ubl
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/u-boot.ais
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/u-boot.dtb
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/u-boot.sb
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#
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16
Makefile
16
Makefile
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@ -720,7 +720,7 @@ ALL-$(CONFIG_RAMBOOT_PBL) += u-boot.pbl
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ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
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ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img
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ALL-$(CONFIG_TPL) += tpl/u-boot-tpl.bin
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ALL-$(CONFIG_OF_SEPARATE) += u-boot.dtb u-boot-dtb.bin
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ALL-$(CONFIG_OF_SEPARATE) += u-boot-dtb.bin
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ifneq ($(CONFIG_SPL_TARGET),)
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ALL-$(CONFIG_SPL) += $(CONFIG_SPL_TARGET:"%"=%)
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endif
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@ -744,11 +744,11 @@ endif
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all: $(ALL-y)
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u-boot.dtb: checkdtc u-boot
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$(MAKE) $(build)=dts binary
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mv dts/dt.dtb $@
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PHONY += dtbs
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dtbs dts/dt.dtb: checkdtc u-boot
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$(Q)$(MAKE) $(build)=dts dtbs
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u-boot-dtb.bin: u-boot.bin u-boot.dtb
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u-boot-dtb.bin: u-boot.bin dts/dt.dtb
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cat $^ >$@
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u-boot.hex: u-boot
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@ -875,8 +875,8 @@ u-boot-nodtb-tegra.bin: spl/u-boot-spl.bin u-boot.bin
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rm spl/u-boot-spl-pad.bin
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ifeq ($(CONFIG_OF_SEPARATE),y)
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u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin u-boot.dtb
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cat u-boot-nodtb-tegra.bin u-boot.dtb > $@
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u-boot-dtb-tegra.bin: u-boot-nodtb-tegra.bin dts/dt.dtb
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cat $^ > $@
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endif
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endif
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@ -1171,7 +1171,7 @@ include/license.h: tools/bin2header COPYING
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# Directories & files removed with 'make clean'
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CLEAN_DIRS += $(MODVERDIR)
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CLEAN_FILES += u-boot.lds include/bmp_logo.h include/bmp_logo_data.h \
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board/*/config.tmp board/*/*/config.tmp dts/*.tmp \
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board/*/config.tmp board/*/*/config.tmp \
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include/autoconf.mk* include/spl-autoconf.mk \
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include/tpl-autoconf.mk
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@ -280,7 +280,7 @@ void board_init_f(ulong bootflag)
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gd->mon_len = _bss_end_ofs;
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#ifdef CONFIG_OF_EMBED
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/* Get a pointer to the FDT */
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gd->fdt_blob = _binary_dt_dtb_start;
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gd->fdt_blob = __dtb_db_begin;
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#elif defined CONFIG_OF_SEPARATE
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/* FDT is at end of image */
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gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
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@ -87,7 +87,7 @@ void board_init_f(ulong not_used)
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#ifdef CONFIG_OF_EMBED
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/* Get a pointer to the FDT */
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gd->fdt_blob = _binary_dt_dtb_start;
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gd->fdt_blob = __dtb_dt_begin;
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#elif defined CONFIG_OF_SEPARATE
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/* FDT is at end of image */
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gd->fdt_blob = (void *)__end;
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@ -92,7 +92,7 @@ int find_fdt(void)
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{
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#ifdef CONFIG_OF_EMBED
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/* Get a pointer to the FDT */
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gd->fdt_blob = _binary_dt_dtb_start;
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gd->fdt_blob = __dtb_dt_begin;
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#elif defined CONFIG_OF_SEPARATE
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/* FDT is at end of image */
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gd->fdt_blob = (ulong *)&_end;
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@ -360,7 +360,7 @@ static int setup_fdt(void)
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{
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#ifdef CONFIG_OF_EMBED
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/* Get a pointer to the FDT */
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gd->fdt_blob = _binary_dt_dtb_start;
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gd->fdt_blob = __dtb_dt_begin;
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#elif defined CONFIG_OF_SEPARATE
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/* FDT is at end of image */
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# ifdef CONFIG_SYS_SYM_OFFSETS
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2
dts/.gitignore
vendored
Normal file
2
dts/.gitignore
vendored
Normal file
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@ -0,0 +1,2 @@
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*.dtb
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*.dtb.S
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74
dts/Makefile
74
dts/Makefile
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@ -7,64 +7,32 @@
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# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
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# enabled. See doc/README.fdt-control for more details.
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DTS_INCDIRS = $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts
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DTS_INCDIRS += $(SRCTREE)/board/$(VENDOR)/dts
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DTS_INCDIRS += $(SRCTREE)/arch/$(ARCH)/dts
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DTS_CPPFLAGS := -x assembler-with-cpp -undef -D__DTS__ \
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-nostdinc $(addprefix -I,$(DTS_INCDIRS))
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DTC_FLAGS := -R 4 -p 0x1000 \
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$(addprefix -i ,$(DTS_INCDIRS))
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# Use a constant name for this so we can access it from C code.
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# objcopy doesn't seem to allow us to set the symbol name independently of
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# the filename.
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DT_BIN := $(obj)/dt.dtb
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DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
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ifeq ($(DEVICE_TREE),)
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$(DT_BIN): FORCE
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echo >&2 "Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file"
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else
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$(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
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$(CPP) $(DTS_CPPFLAGS) $< -o $(DT_BIN).dts.tmp
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$(DTC) $(DTC_FLAGS) -O dtb -o ${DT_BIN} $(DT_BIN).dts.tmp
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DEVICE_TREE := notfound
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endif
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process_lds = \
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$(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
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DTS := $(srctree)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
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# Run the compiler and get the link script from the linker
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GET_LDS = $(CC) $(c_flags) $(ld_flags) -Wl,--verbose 2>&1
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DTC_FLAGS += -i $(srctree)/arch/$(ARCH)/dts -R 4 -p 0x1000
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$(obj)/dt.o: $(DT_BIN)
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# We want the output format and arch.
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# We also hope to win a prize for ugliest Makefile / shell interaction
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# We look in the LDSCRIPT first.
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# Then try the linker which should give us the answer.
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# Then check it worked.
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[ -n "$(LDSCRIPT)" ] && \
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oformat=`$(call process_lds,cat $(LDSCRIPT),FORMAT)` && \
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oarch=`$(call process_lds,cat $(LDSCRIPT),ARCH)` ;\
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\
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[ -z $${oformat} ] && \
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oformat=`$(call process_lds,$(GET_LDS),FORMAT)` ;\
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[ -z $${oarch} ] && \
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oarch=`$(call process_lds,$(GET_LDS),ARCH)` ;\
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\
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[ -z $${oformat} ] && \
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echo "Cannot read OUTPUT_FORMAT from lds file $(LDSCRIPT)" && \
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exit 1 || true ;\
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[ -z $${oarch} ] && \
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echo "Cannot read OUTPUT_ARCH from lds file $(LDSCRIPT)" && \
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exit 1 || true ;\
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\
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cd $(dir ${DT_BIN}) && \
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$(OBJCOPY) -I binary -O $${oformat} -B $${oarch} \
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$(notdir ${DT_BIN}) $(notdir $@)
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rm $(DT_BIN)
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$(obj)/dt.dtb: $(DTS) FORCE
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$(call if_changed_dep,dtc)
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obj-$(CONFIG_OF_EMBED) := dt.o
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targets += dt.dtb
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binary: $(DT_BIN)
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$(DTS):
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@echo >&2
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@echo >&2 "Device Tree Source is not specified."
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@echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"
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@echo >&2 "or build with 'DEVICE_TREE=<dts-file-name>' argument"
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@/bin/false
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.SECONDARY: $(obj)/dt.dtb.S
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obj-$(CONFIG_OF_EMBED) := dt.dtb.o
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dtbs: $(obj)/dt.dtb
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@:
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clean-files := dt.dtb.S
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@ -302,7 +302,7 @@ int checkdram (void);
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int last_stage_init(void);
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extern ulong monitor_flash_len;
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int mac_read_from_eeprom(void);
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extern u8 _binary_dt_dtb_start[]; /* embedded device tree blob */
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extern u8 __dtb_dt_begin[]; /* embedded device tree blob */
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int set_cpu_clk_info(void);
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int print_cpuinfo(void);
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int update_flash_size(int flash_size);
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@ -151,9 +151,10 @@ cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \
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ld_flags = $(LDFLAGS) $(ldflags-y)
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# Modified for U-Boot
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dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
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-I$(srctree)/arch/$(SRCARCH)/boot/dts \
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-I$(srctree)/arch/$(SRCARCH)/boot/dts/include \
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-I$(srctree)/board/$(VENDOR)/dts/ \
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-I$(srctree)/arch/$(ARCH)/dts \
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-undef -D__DTS__
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# Finds the multi-part object the current object will be linked into
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@ -247,25 +248,24 @@ cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
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# Generate an assembly file to wrap the output of the device tree compiler
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quiet_cmd_dt_S_dtb= DTB $@
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# Modified for U-Boot
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cmd_dt_S_dtb= \
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( \
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echo '\#include <asm-generic/vmlinux.lds.h>'; \
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echo '.section .dtb.init.rodata,"a"'; \
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echo '.balign STRUCT_ALIGNMENT'; \
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echo '.global __dtb_$(*F)_begin'; \
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echo '__dtb_$(*F)_begin:'; \
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echo '.incbin "$<" '; \
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echo '__dtb_$(*F)_end:'; \
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echo '.global __dtb_$(*F)_end'; \
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echo '.balign STRUCT_ALIGNMENT'; \
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) > $@
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$(obj)/%.dtb.S: $(obj)/%.dtb
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$(call cmd,dt_S_dtb)
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quiet_cmd_dtc = DTC $@
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# Modified for U-Boot
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cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
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$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
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dtc -O dtb -o $@ -b 0 \
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-i $(dir $<) $(DTC_FLAGS) \
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-d $(depfile).dtc.tmp $(dtc-tmp) ; \
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cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
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