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      1 # SPDX-License-Identifier: GPL-2.0
      2 # Backward compatibility
      3 asflags-y  += $(EXTRA_AFLAGS)
      4 ccflags-y  += $(EXTRA_CFLAGS)
      5 cppflags-y += $(EXTRA_CPPFLAGS)
      6 ldflags-y  += $(EXTRA_LDFLAGS)
      7 
      8 #
      9 # flags that take effect in sub directories
     10 export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
     11 export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
     12 
     13 # Figure out what we need to build from the various variables
     14 # ===========================================================================
     15 
     16 # When an object is listed to be built compiled-in and modular,
     17 # only build the compiled-in version
     18 
     19 obj-m := $(filter-out $(obj-y),$(obj-m))
     20 
     21 # Libraries are always collected in one lib file.
     22 # Filter out objects already built-in
     23 
     24 lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
     25 
     26 
     27 # Handle objects in subdirs
     28 # ---------------------------------------------------------------------------
     29 # o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o
     30 #   and add the directory to the list of dirs to descend into: $(subdir-y)
     31 # o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
     32 #   and add the directory to the list of dirs to descend into: $(subdir-m)
     33 
     34 # Determine modorder.
     35 # Unfortunately, we don't have information about ordering between -y
     36 # and -m subdirs.  Just put -y's first.
     37 modorder	:= $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
     38 
     39 __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
     40 subdir-y	+= $(__subdir-y)
     41 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
     42 subdir-m	+= $(__subdir-m)
     43 obj-y		:= $(patsubst %/, %/built-in.o, $(obj-y))
     44 obj-m		:= $(filter-out %/, $(obj-m))
     45 
     46 # Subdirectories we need to descend into
     47 
     48 subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
     49 
     50 # if $(foo-objs) exists, foo.o is a composite object
     51 multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
     52 multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
     53 multi-used   := $(multi-used-y) $(multi-used-m)
     54 single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m)))
     55 
     56 # Build list of the parts of our composite objects, our composite
     57 # objects depend on those (obviously)
     58 multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
     59 multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
     60 multi-objs   := $(multi-objs-y) $(multi-objs-m)
     61 
     62 # $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
     63 # tell kbuild to descend
     64 subdir-obj-y := $(filter %/built-in.o, $(obj-y))
     65 
     66 # $(obj-dirs) is a list of directories that contain object files
     67 obj-dirs := $(dir $(multi-objs) $(obj-y))
     68 
     69 # Replace multi-part objects by their individual parts, look at local dir only
     70 real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
     71 real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
     72 
     73 # Add subdir path
     74 
     75 extra-y		:= $(addprefix $(obj)/,$(extra-y))
     76 always		:= $(addprefix $(obj)/,$(always))
     77 targets		:= $(addprefix $(obj)/,$(targets))
     78 modorder	:= $(addprefix $(obj)/,$(modorder))
     79 obj-y		:= $(addprefix $(obj)/,$(obj-y))
     80 obj-m		:= $(addprefix $(obj)/,$(obj-m))
     81 lib-y		:= $(addprefix $(obj)/,$(lib-y))
     82 subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
     83 real-objs-y	:= $(addprefix $(obj)/,$(real-objs-y))
     84 real-objs-m	:= $(addprefix $(obj)/,$(real-objs-m))
     85 single-used-m	:= $(addprefix $(obj)/,$(single-used-m))
     86 multi-used-y	:= $(addprefix $(obj)/,$(multi-used-y))
     87 multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
     88 multi-objs-y	:= $(addprefix $(obj)/,$(multi-objs-y))
     89 multi-objs-m	:= $(addprefix $(obj)/,$(multi-objs-m))
     90 subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))
     91 obj-dirs	:= $(addprefix $(obj)/,$(obj-dirs))
     92 
     93 # These flags are needed for modversions and compiling, so we define them here
     94 # already
     95 # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
     96 # end up in (or would, if it gets compiled in)
     97 # Note: Files that end up in two or more modules are compiled without the
     98 #       KBUILD_MODNAME definition. The reason is that any made-up name would
     99 #       differ in different configs.
    100 name-fix = $(subst $(comma),_,$(subst -,_,$1))
    101 basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
    102 modname_flags  = $(if $(filter 1,$(words $(modname))),\
    103                  -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
    104 
    105 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
    106                  $(ccflags-y) $(CFLAGS_$(basetarget).o)
    107 _c_flags       = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags))
    108 orig_a_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
    109                  $(asflags-y) $(AFLAGS_$(basetarget).o)
    110 _a_flags       = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags))
    111 _cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
    112 
    113 #
    114 # Enable gcov profiling flags for a file, directory or for all files depending
    115 # on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
    116 # (in this order)
    117 #
    118 ifeq ($(CONFIG_GCOV_KERNEL),y)
    119 _c_flags += $(if $(patsubst n%,, \
    120 		$(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \
    121 		$(CFLAGS_GCOV))
    122 endif
    123 
    124 #
    125 # Enable address sanitizer flags for kernel except some files or directories
    126 # we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
    127 #
    128 ifeq ($(CONFIG_KASAN),y)
    129 _c_flags += $(if $(patsubst n%,, \
    130 		$(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \
    131 		$(CFLAGS_KASAN))
    132 endif
    133 
    134 # If building the kernel in a separate objtree expand all occurrences
    135 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
    136 
    137 ifeq ($(KBUILD_SRC),)
    138 __c_flags	= $(_c_flags)
    139 __a_flags	= $(_a_flags)
    140 __cpp_flags     = $(_cpp_flags)
    141 else
    142 
    143 # -I$(obj) locates generated .h files
    144 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
    145 #   and locates generated .h files
    146 # FIXME: Replace both with specific CFLAGS* statements in the makefiles
    147 __c_flags	= $(call addtree,-I$(obj)) $(call flags,_c_flags)
    148 __a_flags	=                          $(call flags,_a_flags)
    149 __cpp_flags     =                          $(call flags,_cpp_flags)
    150 endif
    151 
    152 # Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE
    153 c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
    154 		 $(__c_flags) $(modkern_cflags)                           \
    155 		 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
    156 
    157 a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
    158 		 $(__a_flags) $(modkern_aflags)
    159 
    160 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE)     \
    161 		 $(__cpp_flags)
    162 
    163 ld_flags       = $(LDFLAGS) $(ldflags-y)
    164 
    165 # Try these files in order to find the U-Boot-specific .dtsi include file
    166 u_boot_dtsi_options = $(strip $(wildcard $(dir $<)$(basename $(notdir $<))-u-boot.dtsi) \
    167 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \
    168 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \
    169 	$(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \
    170 	$(wildcard $(dir $<)u-boot.dtsi))
    171 
    172 u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \
    173 	$(dir $<)$(basename $(notdir $<))-u-boot.dtsi \
    174 	$(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \
    175 	$(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \
    176 	$(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \
    177 	$(dir $<)u-boot.dtsi ... \
    178 	found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!))
    179 
    180 # Uncomment for debugging
    181 # This shows all the files that were considered and the one that we chose.
    182 # u_boot_dtsi_options_debug = $(u_boot_dtsi_options_raw)
    183 
    184 # We use the first match
    185 u_boot_dtsi = $(strip $(u_boot_dtsi_options_debug) \
    186 	$(notdir $(firstword $(u_boot_dtsi_options))))
    187 
    188 # Modified for U-Boot
    189 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
    190 		 -I$(srctree)/arch/$(ARCH)/dts                           \
    191 		 -I$(srctree)/arch/$(ARCH)/dts/include                   \
    192 		 -Iinclude                                               \
    193 		 -I$(srctree)/include                                    \
    194 		 -I$(srctree)/arch/$(ARCH)/include                       \
    195 		 -include $(srctree)/include/linux/kconfig.h             \
    196 		 -D__ASSEMBLY__                                          \
    197 		 -undef -D__DTS__
    198 
    199 # Finds the multi-part object the current object will be linked into
    200 modname-multi = $(sort $(foreach m,$(multi-used),\
    201 		$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
    202 
    203 # Useful for describing the dependency of composite objects
    204 # Usage:
    205 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
    206 define multi_depend
    207 $(foreach m, $(notdir $1), \
    208 	$(eval $(obj)/$m: \
    209 	$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
    210 endef
    211 
    212 # LEX
    213 # ---------------------------------------------------------------------------
    214 quiet_cmd_flex = LEX     $@
    215       cmd_flex = $(LEX) -o$@ -L $<
    216 
    217 .PRECIOUS: $(obj)/%.lex.c
    218 $(obj)/%.lex.c: $(src)/%.l FORCE
    219 	$(call if_changed,flex)
    220 
    221 # YACC
    222 # ---------------------------------------------------------------------------
    223 quiet_cmd_bison = YACC    $@
    224       cmd_bison = $(YACC) -o$@ -t -l $<
    225 
    226 .PRECIOUS: $(obj)/%.tab.c
    227 $(obj)/%.tab.c: $(src)/%.y FORCE
    228 	$(call if_changed,bison)
    229 
    230 quiet_cmd_bison_h = YACC    $@
    231       cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $<
    232 
    233 .PRECIOUS: $(obj)/%.tab.h
    234 $(obj)/%.tab.h: $(src)/%.y FORCE
    235 	$(call if_changed,bison_h)
    236 
    237 # Shipped files
    238 # ===========================================================================
    239 
    240 quiet_cmd_shipped = SHIPPED $@
    241 cmd_shipped = cat $< > $@
    242 
    243 $(obj)/%: $(src)/%_shipped
    244 	$(call cmd,shipped)
    245 
    246 # Commands useful for building a boot image
    247 # ===========================================================================
    248 #
    249 #	Use as following:
    250 #
    251 #	target: source(s) FORCE
    252 #		$(if_changed,ld/objcopy/gzip)
    253 #
    254 #	and add target to extra-y so that we know we have to
    255 #	read in the saved command line
    256 
    257 # Linking
    258 # ---------------------------------------------------------------------------
    259 
    260 quiet_cmd_ld = LD      $@
    261 cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
    262 	       $(filter-out FORCE,$^) -o $@
    263 
    264 # Objcopy
    265 # ---------------------------------------------------------------------------
    266 
    267 quiet_cmd_objcopy = OBJCOPY $@
    268 cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
    269 
    270 # Gzip
    271 # ---------------------------------------------------------------------------
    272 
    273 quiet_cmd_gzip = GZIP    $@
    274 cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \
    275 	(rm -f $@ ; false)
    276 
    277 # DTC
    278 # ---------------------------------------------------------------------------
    279 
    280 # Generate an assembly file to wrap the output of the device tree compiler
    281 quiet_cmd_dt_S_dtb= DTB     $@
    282 # Modified for U-Boot
    283 cmd_dt_S_dtb=						\
    284 (							\
    285 	echo '.section .dtb.init.rodata,"a"';		\
    286 	echo '.balign 16';				\
    287 	echo '.global __dtb_$(subst -,_,$(*F))_begin';	\
    288 	echo '__dtb_$(subst -,_,$(*F))_begin:';		\
    289 	echo '.incbin "$<" ';				\
    290 	echo '__dtb_$(subst -,_,$(*F))_end:';		\
    291 	echo '.global __dtb_$(subst -,_,$(*F))_end';	\
    292 	echo '.balign 16';				\
    293 ) > $@
    294 
    295 $(obj)/%.dtb.S: $(obj)/%.dtb
    296 	$(call cmd,dt_S_dtb)
    297 
    298 quiet_cmd_dtc = DTC     $@
    299 # Modified for U-Boot
    300 # Bring in any U-Boot-specific include at the end of the file
    301 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
    302 	(cat $<; $(if $(u_boot_dtsi),echo '\#include "$(u_boot_dtsi)"')) > $(pre-tmp); \
    303 	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \
    304 	$(DTC) -O dtb -o $@ -b 0 \
    305 		-i $(dir $<) $(DTC_FLAGS) \
    306 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
    307 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
    308 
    309 $(obj)/%.dtb: $(src)/%.dts FORCE
    310 	$(call if_changed_dep,dtc)
    311 
    312 pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp)
    313 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
    314 
    315 # DTCO
    316 # ---------------------------------------------------------------------------
    317 
    318 quiet_cmd_dtco = DTCO    $@
    319 # Rule for objects only; does not put specific u-boot include at the end
    320 # No generation of assembly file either
    321 # Modified for U-Boot
    322 cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \
    323 	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) - ; \
    324 	$(DTC) -@ -O dtb -o $@ -b 0 \
    325 		-i $(dir $<) $(DTC_FLAGS) \
    326 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
    327 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
    328 
    329 $(obj)/%.dtbo: $(src)/%.dts FORCE
    330 	$(call if_changed_dep,dtco)
    331 
    332 # Fonts
    333 # ---------------------------------------------------------------------------
    334 
    335 # Generate an assembly file to wrap the font data
    336 quiet_cmd_S_ttf= TTF     $@
    337 # Modified for U-Boot
    338 cmd_S_ttf=						\
    339 (							\
    340 	echo '.section .rodata.ttf.init,"a"';		\
    341 	echo '.balign 16';				\
    342 	echo '.global __ttf_$(*F)_begin';		\
    343 	echo '__ttf_$(*F)_begin:';			\
    344 	echo '.incbin "$<" ';				\
    345 	echo '__ttf_$(*F)_end:';			\
    346 	echo '.global __ttf_$(*F)_end';			\
    347 	echo '.balign 16';				\
    348 ) > $@
    349 
    350 $(obj)/%.S: $(src)/%.ttf
    351 	$(call cmd,S_ttf)
    352 
    353 # EFI applications
    354 # A Makefile target *.efi is built as EFI application.
    355 # A Makefile target *_efi.S wraps *.efi as built-in EFI application.
    356 # ---------------------------------------------------------------------------
    357 
    358 # Generate an assembly file to wrap the EFI app
    359 cmd_S_efi=					\
    360 (						\
    361 	echo '.section .rodata.$*.init,"a"';	\
    362 	echo '.balign 16';			\
    363 	echo '.global __efi_$*_begin';		\
    364 	echo '__efi_$*_begin:';			\
    365 	echo '.incbin "$<" ';			\
    366 	echo '__efi_$*_end:';			\
    367 	echo '.global __efi_$*_end';		\
    368 	echo '.balign 16';			\
    369 ) > $@
    370 
    371 $(obj)/%_efi.S: $(obj)/%.efi
    372 	$(call cmd,S_efi)
    373 
    374 quiet_cmd_efi_objcopy = OBJCOPY $@
    375 cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \
    376 		.dynamic -j .dynsym  -j .rel* -j .rela* -j .reloc \
    377 		$(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@
    378 
    379 $(obj)/%.efi: $(obj)/%_efi.so
    380 	$(call cmd,efi_objcopy)
    381 
    382 quiet_cmd_efi_ld = LD      $@
    383 cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \
    384 		-Bsymbolic $^ -o $@
    385 
    386 EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS)
    387 
    388 $(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S)
    389 	$(call if_changed_dep,as_o_S)
    390 
    391 $(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE
    392 	$(call cmd,force_checksrc)
    393 	$(call if_changed_rule,cc_o_c)
    394 
    395 $(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o
    396 	$(call cmd,efi_ld)
    397 
    398 # ACPI
    399 # ---------------------------------------------------------------------------
    400 quiet_cmd_acpi_c_asl= ASL     $<
    401 cmd_acpi_c_asl=         \
    402 	$(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -P $(UBOOTINCLUDE) -o $<.tmp $<; \
    403 	iasl -p $< -tc $<.tmp $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \
    404 	mv $(patsubst %.asl,%.hex,$<) $@
    405 
    406 $(obj)/dsdt.c:    $(src)/dsdt.asl
    407 	$(call cmd,acpi_c_asl)
    408 	$(Q)sed -i -e "s,dsdt_aml_code,AmlCode," $@
    409 
    410 # Bzip2
    411 # ---------------------------------------------------------------------------
    412 
    413 # Bzip2 and LZMA do not include size in file... so we have to fake that;
    414 # append the size as a 32-bit littleendian number as gzip does.
    415 size_append = printf $(shell						\
    416 dec_size=0;								\
    417 for F in $1; do								\
    418 	fsize=$$(stat -c "%s" $$F);					\
    419 	dec_size=$$(expr $$dec_size + $$fsize);				\
    420 done;									\
    421 printf "%08x\n" $$dec_size |						\
    422 	sed 's/\(..\)/\1 /g' | {					\
    423 		read ch0 ch1 ch2 ch3;					\
    424 		for ch in $$ch3 $$ch2 $$ch1 $$ch0; do			\
    425 			printf '%s%03o' '\\' $$((0x$$ch)); 		\
    426 		done;							\
    427 	}								\
    428 )
    429 
    430 quiet_cmd_bzip2 = BZIP2   $@
    431 cmd_bzip2 = (cat $(filter-out FORCE,$^) | \
    432 	bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
    433 	(rm -f $@ ; false)
    434 
    435 # Lzma
    436 # ---------------------------------------------------------------------------
    437 
    438 quiet_cmd_lzma = LZMA    $@
    439 cmd_lzma = (cat $(filter-out FORCE,$^) | \
    440 	lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
    441 	(rm -f $@ ; false)
    442 
    443 quiet_cmd_lzo = LZO     $@
    444 cmd_lzo = (cat $(filter-out FORCE,$^) | \
    445 	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
    446 	(rm -f $@ ; false)
    447 
    448 quiet_cmd_lz4 = LZ4     $@
    449 cmd_lz4 = (cat $(filter-out FORCE,$^) | \
    450 	lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
    451 	(rm -f $@ ; false)
    452 
    453 # U-Boot mkimage
    454 # ---------------------------------------------------------------------------
    455 
    456 MKIMAGE := $(srctree)/scripts/mkuboot.sh
    457 
    458 # SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
    459 # the number of overrides in arch makefiles
    460 UIMAGE_ARCH ?= $(SRCARCH)
    461 UIMAGE_COMPRESSION ?= $(if $(2),$(2),none)
    462 UIMAGE_OPTS-y ?=
    463 UIMAGE_TYPE ?= kernel
    464 UIMAGE_LOADADDR ?= arch_must_set_this
    465 UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
    466 UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)'
    467 UIMAGE_IN ?= $<
    468 UIMAGE_OUT ?= $@
    469 
    470 quiet_cmd_uimage = UIMAGE  $(UIMAGE_OUT)
    471       cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
    472 			-C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
    473 			-T $(UIMAGE_TYPE) \
    474 			-a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
    475 			-n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT)
    476 
    477 # XZ
    478 # ---------------------------------------------------------------------------
    479 # Use xzkern to compress the kernel image and xzmisc to compress other things.
    480 #
    481 # xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
    482 # of the kernel decompressor. A BCJ filter is used if it is available for
    483 # the target architecture. xzkern also appends uncompressed size of the data
    484 # using size_append. The .xz format has the size information available at
    485 # the end of the file too, but it's in more complex format and it's good to
    486 # avoid changing the part of the boot code that reads the uncompressed size.
    487 # Note that the bytes added by size_append will make the xz tool think that
    488 # the file is corrupt. This is expected.
    489 #
    490 # xzmisc doesn't use size_append, so it can be used to create normal .xz
    491 # files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
    492 # big dictionary would increase the memory usage too much in the multi-call
    493 # decompression mode. A BCJ filter isn't used either.
    494 quiet_cmd_xzkern = XZKERN  $@
    495 cmd_xzkern = (cat $(filter-out FORCE,$^) | \
    496 	sh $(srctree)/scripts/xz_wrap.sh && \
    497 	$(call size_append, $(filter-out FORCE,$^))) > $@ || \
    498 	(rm -f $@ ; false)
    499 
    500 quiet_cmd_xzmisc = XZMISC  $@
    501 cmd_xzmisc = (cat $(filter-out FORCE,$^) | \
    502 	xz --check=crc32 --lzma2=dict=1MiB) > $@ || \
    503 	(rm -f $@ ; false)
    504 
    505 # Additional commands for U-Boot
    506 #
    507 # mkimage
    508 # ---------------------------------------------------------------------------
    509 MKIMAGEOUTPUT ?= /dev/null
    510 quiet_cmd_mkimage = MKIMAGE $@
    511 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
    512 	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
    513 
    514 # fdtgrep
    515 # ---------------------------------------------------------------------------
    516 # Pass the original device tree file through fdtgrep twice. The first pass
    517 # removes any unwanted nodes (i.e. those which don't have the
    518 # 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
    519 # pass removes various unused properties from the remaining nodes.
    520 # The output is typically a much smaller device tree file.
    521 ifeq ($(CONFIG_TPL_BUILD),y)
    522 fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
    523 else
    524 fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
    525 endif
    526 quiet_cmd_fdtgrep = FDTGREP $@
    527       cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
    528 		-n /chosen -n /config -O dtb | \
    529 	$(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
    530 		$(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
    531