1# 2# SPDX-License-Identifier: GPL-2.0 3# 4# Backward compatibility 5asflags-y += $(EXTRA_AFLAGS) 6ccflags-y += $(EXTRA_CFLAGS) 7cppflags-y += $(EXTRA_CPPFLAGS) 8ldflags-y += $(EXTRA_LDFLAGS) 9 10# 11# flags that take effect in sub directories 12export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) 13export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y) 14 15# Figure out what we need to build from the various variables 16# =========================================================================== 17 18# When an object is listed to be built compiled-in and modular, 19# only build the compiled-in version 20 21obj-m := $(filter-out $(obj-y),$(obj-m)) 22 23# Libraries are always collected in one lib file. 24# Filter out objects already built-in 25 26lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m))) 27 28 29# Handle objects in subdirs 30# --------------------------------------------------------------------------- 31# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o 32# and add the directory to the list of dirs to descend into: $(subdir-y) 33# o if we encounter foo/ in $(obj-m), remove it from $(obj-m) 34# and add the directory to the list of dirs to descend into: $(subdir-m) 35 36# Determine modorder. 37# Unfortunately, we don't have information about ordering between -y 38# and -m subdirs. Just put -y's first. 39modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) 40 41__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) 42subdir-y += $(__subdir-y) 43__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) 44subdir-m += $(__subdir-m) 45obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) 46obj-m := $(filter-out %/, $(obj-m)) 47 48# Subdirectories we need to descend into 49 50subdir-ym := $(sort $(subdir-y) $(subdir-m)) 51 52# if $(foo-objs) exists, foo.o is a composite object 53multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) 54multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) 55multi-used := $(multi-used-y) $(multi-used-m) 56single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) 57 58# Build list of the parts of our composite objects, our composite 59# objects depend on those (obviously) 60multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) 61multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) 62multi-objs := $(multi-objs-y) $(multi-objs-m) 63 64# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to 65# tell kbuild to descend 66subdir-obj-y := $(filter %/built-in.o, $(obj-y)) 67 68# $(obj-dirs) is a list of directories that contain object files 69obj-dirs := $(dir $(multi-objs) $(obj-y)) 70 71# Replace multi-part objects by their individual parts, look at local dir only 72real-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) 73real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) 74 75# Add subdir path 76 77extra-y := $(addprefix $(obj)/,$(extra-y)) 78always := $(addprefix $(obj)/,$(always)) 79targets := $(addprefix $(obj)/,$(targets)) 80modorder := $(addprefix $(obj)/,$(modorder)) 81obj-y := $(addprefix $(obj)/,$(obj-y)) 82obj-m := $(addprefix $(obj)/,$(obj-m)) 83lib-y := $(addprefix $(obj)/,$(lib-y)) 84subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) 85real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) 86real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) 87single-used-m := $(addprefix $(obj)/,$(single-used-m)) 88multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) 89multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) 90multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) 91multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) 92subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) 93obj-dirs := $(addprefix $(obj)/,$(obj-dirs)) 94 95# These flags are needed for modversions and compiling, so we define them here 96# already 97# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will 98# end up in (or would, if it gets compiled in) 99# Note: Files that end up in two or more modules are compiled without the 100# KBUILD_MODNAME definition. The reason is that any made-up name would 101# differ in different configs. 102name-fix = $(subst $(comma),_,$(subst -,_,$1)) 103basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))" 104modname_flags = $(if $(filter 1,$(words $(modname))),\ 105 -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))") 106 107orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ 108 $(ccflags-y) $(CFLAGS_$(basetarget).o) 109_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) 110orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ 111 $(asflags-y) $(AFLAGS_$(basetarget).o) 112_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags)) 113_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) 114 115# 116# Enable gcov profiling flags for a file, directory or for all files depending 117# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL 118# (in this order) 119# 120ifeq ($(CONFIG_GCOV_KERNEL),y) 121_c_flags += $(if $(patsubst n%,, \ 122 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ 123 $(CFLAGS_GCOV)) 124endif 125 126# 127# Enable address sanitizer flags for kernel except some files or directories 128# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) 129# 130ifeq ($(CONFIG_KASAN),y) 131_c_flags += $(if $(patsubst n%,, \ 132 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ 133 $(CFLAGS_KASAN)) 134endif 135 136# If building the kernel in a separate objtree expand all occurrences 137# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). 138 139ifeq ($(KBUILD_SRC),) 140__c_flags = $(_c_flags) 141__a_flags = $(_a_flags) 142__cpp_flags = $(_cpp_flags) 143else 144 145# -I$(obj) locates generated .h files 146# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files 147# and locates generated .h files 148# FIXME: Replace both with specific CFLAGS* statements in the makefiles 149__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags) 150__a_flags = $(call flags,_a_flags) 151__cpp_flags = $(call flags,_cpp_flags) 152endif 153 154# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE 155c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 156 $(__c_flags) $(modkern_cflags) \ 157 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags) 158 159a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 160 $(__a_flags) $(modkern_aflags) 161 162cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 163 $(__cpp_flags) 164 165ld_flags = $(LDFLAGS) $(ldflags-y) 166 167# Try these files in order to find the U-Boot-specific .dtsi include file 168u_boot_dtsi_options = $(strip $(wildcard $(dir $<)$(basename $(notdir $<))-u-boot.dtsi) \ 169 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \ 170 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \ 171 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \ 172 $(wildcard $(dir $<)u-boot.dtsi)) 173 174u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \ 175 $(dir $<)$(basename $(notdir $<))-u-boot.dtsi \ 176 $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \ 177 $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \ 178 $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \ 179 $(dir $<)u-boot.dtsi ... \ 180 found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!)) 181 182# Uncomment for debugging 183# This shows all the files that were considered and the one that we chose. 184# u_boot_dtsi_options_debug = $(u_boot_dtsi_options_raw) 185 186# We use the first match 187u_boot_dtsi = $(strip $(u_boot_dtsi_options_debug) \ 188 $(notdir $(firstword $(u_boot_dtsi_options)))) 189 190# Modified for U-Boot 191dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ 192 -I$(srctree)/arch/$(ARCH)/dts \ 193 -I$(srctree)/arch/$(ARCH)/dts/include \ 194 -Iinclude \ 195 -I$(srctree)/include \ 196 -I$(srctree)/arch/$(ARCH)/include \ 197 -include $(srctree)/include/linux/kconfig.h \ 198 -D__ASSEMBLY__ \ 199 -undef -D__DTS__ 200 201# Finds the multi-part object the current object will be linked into 202modname-multi = $(sort $(foreach m,$(multi-used),\ 203 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) 204 205# Useful for describing the dependency of composite objects 206# Usage: 207# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) 208define multi_depend 209$(foreach m, $(notdir $1), \ 210 $(eval $(obj)/$m: \ 211 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) 212endef 213 214ifdef REGENERATE_PARSERS 215 216# GPERF 217# --------------------------------------------------------------------------- 218quiet_cmd_gperf = GPERF $@ 219 cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $< 220 221.PRECIOUS: $(src)/%.hash.c_shipped 222$(src)/%.hash.c_shipped: $(src)/%.gperf 223 $(call cmd,gperf) 224 225# LEX 226# --------------------------------------------------------------------------- 227LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy) 228 229quiet_cmd_flex = LEX $@ 230 cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $< 231 232.PRECIOUS: $(src)/%.lex.c_shipped 233$(src)/%.lex.c_shipped: $(src)/%.l 234 $(call cmd,flex) 235 236# YACC 237# --------------------------------------------------------------------------- 238YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy) 239 240quiet_cmd_bison = YACC $@ 241 cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $< 242 243.PRECIOUS: $(src)/%.tab.c_shipped 244$(src)/%.tab.c_shipped: $(src)/%.y 245 $(call cmd,bison) 246 247quiet_cmd_bison_h = YACC $@ 248 cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $< 249 250.PRECIOUS: $(src)/%.tab.h_shipped 251$(src)/%.tab.h_shipped: $(src)/%.y 252 $(call cmd,bison_h) 253 254endif 255 256# Shipped files 257# =========================================================================== 258 259quiet_cmd_shipped = SHIPPED $@ 260cmd_shipped = cat $< > $@ 261 262$(obj)/%: $(src)/%_shipped 263 $(call cmd,shipped) 264 265# Commands useful for building a boot image 266# =========================================================================== 267# 268# Use as following: 269# 270# target: source(s) FORCE 271# $(if_changed,ld/objcopy/gzip) 272# 273# and add target to extra-y so that we know we have to 274# read in the saved command line 275 276# Linking 277# --------------------------------------------------------------------------- 278 279quiet_cmd_ld = LD $@ 280cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \ 281 $(filter-out FORCE,$^) -o $@ 282 283# Objcopy 284# --------------------------------------------------------------------------- 285 286quiet_cmd_objcopy = OBJCOPY $@ 287cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ 288 289# Gzip 290# --------------------------------------------------------------------------- 291 292quiet_cmd_gzip = GZIP $@ 293cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ 294 (rm -f $@ ; false) 295 296# DTC 297# --------------------------------------------------------------------------- 298 299# Generate an assembly file to wrap the output of the device tree compiler 300quiet_cmd_dt_S_dtb= DTB $@ 301# Modified for U-Boot 302cmd_dt_S_dtb= \ 303( \ 304 echo '.section .dtb.init.rodata,"a"'; \ 305 echo '.balign 16'; \ 306 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ 307 echo '__dtb_$(subst -,_,$(*F))_begin:'; \ 308 echo '.incbin "$<" '; \ 309 echo '__dtb_$(subst -,_,$(*F))_end:'; \ 310 echo '.global __dtb_$(subst -,_,$(*F))_end'; \ 311 echo '.balign 16'; \ 312) > $@ 313 314$(obj)/%.dtb.S: $(obj)/%.dtb 315 $(call cmd,dt_S_dtb) 316 317quiet_cmd_dtc = DTC $@ 318# Modified for U-Boot 319# Bring in any U-Boot-specific include at the end of the file 320cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ 321 (cat $<; $(if $(u_boot_dtsi),echo '\#include "$(u_boot_dtsi)"')) > $(pre-tmp); \ 322 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \ 323 $(DTC) -O dtb -o $@ -b 0 \ 324 -i $(dir $<) $(DTC_FLAGS) \ 325 -d $(depfile).dtc.tmp $(dtc-tmp) ; \ 326 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 327 328$(obj)/%.dtb: $(src)/%.dts FORCE 329 $(call if_changed_dep,dtc) 330 331pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp) 332dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) 333 334# DTCO 335# --------------------------------------------------------------------------- 336 337quiet_cmd_dtco = DTCO $@ 338# Rule for objects only; does not put specific u-boot include at the end 339# No generation of assembly file either 340# Modified for U-Boot 341cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \ 342 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) - ; \ 343 $(DTC) -@ -O dtb -o $@ -b 0 \ 344 -i $(dir $<) $(DTC_FLAGS) \ 345 -d $(depfile).dtc.tmp $(dtc-tmp) ; \ 346 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 347 348$(obj)/%.dtbo: $(src)/%.dts FORCE 349 $(call if_changed_dep,dtco) 350 351# Fonts 352# --------------------------------------------------------------------------- 353 354# Generate an assembly file to wrap the font data 355quiet_cmd_S_ttf= TTF $@ 356# Modified for U-Boot 357cmd_S_ttf= \ 358( \ 359 echo '.section .rodata.ttf.init,"a"'; \ 360 echo '.balign 16'; \ 361 echo '.global __ttf_$(*F)_begin'; \ 362 echo '__ttf_$(*F)_begin:'; \ 363 echo '.incbin "$<" '; \ 364 echo '__ttf_$(*F)_end:'; \ 365 echo '.global __ttf_$(*F)_end'; \ 366 echo '.balign 16'; \ 367) > $@ 368 369$(obj)/%.S: $(src)/%.ttf 370 $(call cmd,S_ttf) 371 372# EFI applications 373# A Makefile target *.efi is built as EFI application. 374# A Makefile target *_efi.S wraps *.efi as built-in EFI application. 375# --------------------------------------------------------------------------- 376 377# Generate an assembly file to wrap the EFI app 378cmd_S_efi= \ 379( \ 380 echo '.section .rodata.$*.init,"a"'; \ 381 echo '.balign 16'; \ 382 echo '.global __efi_$*_begin'; \ 383 echo '__efi_$*_begin:'; \ 384 echo '.incbin "$<" '; \ 385 echo '__efi_$*_end:'; \ 386 echo '.global __efi_$*_end'; \ 387 echo '.balign 16'; \ 388) > $@ 389 390$(obj)/%_efi.S: $(obj)/%.efi 391 $(call cmd,S_efi) 392 393quiet_cmd_efi_objcopy = OBJCOPY $@ 394cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \ 395 .dynamic -j .dynsym -j .rel* -j .rela* -j .reloc \ 396 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@ 397 398$(obj)/%.efi: $(obj)/%_efi.so 399 $(call cmd,efi_objcopy) 400 401quiet_cmd_efi_ld = LD $@ 402cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \ 403 -Bsymbolic $^ -o $@ 404 405EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS) 406 407$(obj)/%_efi.so: $(obj)/%.o arch/$(ARCH)/lib/$(EFI_CRT0) \ 408 arch/$(ARCH)/lib/$(EFI_RELOC) 409 $(call cmd,efi_ld) 410 411# ACPI 412# --------------------------------------------------------------------------- 413quiet_cmd_acpi_c_asl= ASL $< 414cmd_acpi_c_asl= \ 415 $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -P $(UBOOTINCLUDE) -o $<.tmp $<; \ 416 iasl -p $< -tc $<.tmp $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ 417 mv $(patsubst %.asl,%.hex,$<) $@ 418 419$(obj)/dsdt.c: $(src)/dsdt.asl 420 $(call cmd,acpi_c_asl) 421 422# Bzip2 423# --------------------------------------------------------------------------- 424 425# Bzip2 and LZMA do not include size in file... so we have to fake that; 426# append the size as a 32-bit littleendian number as gzip does. 427size_append = printf $(shell \ 428dec_size=0; \ 429for F in $1; do \ 430 fsize=$$(stat -c "%s" $$F); \ 431 dec_size=$$(expr $$dec_size + $$fsize); \ 432done; \ 433printf "%08x\n" $$dec_size | \ 434 sed 's/\(..\)/\1 /g' | { \ 435 read ch0 ch1 ch2 ch3; \ 436 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ 437 printf '%s%03o' '\\' $$((0x$$ch)); \ 438 done; \ 439 } \ 440) 441 442quiet_cmd_bzip2 = BZIP2 $@ 443cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ 444 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 445 (rm -f $@ ; false) 446 447# Lzma 448# --------------------------------------------------------------------------- 449 450quiet_cmd_lzma = LZMA $@ 451cmd_lzma = (cat $(filter-out FORCE,$^) | \ 452 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 453 (rm -f $@ ; false) 454 455quiet_cmd_lzo = LZO $@ 456cmd_lzo = (cat $(filter-out FORCE,$^) | \ 457 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 458 (rm -f $@ ; false) 459 460quiet_cmd_lz4 = LZ4 $@ 461cmd_lz4 = (cat $(filter-out FORCE,$^) | \ 462 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 463 (rm -f $@ ; false) 464 465# U-Boot mkimage 466# --------------------------------------------------------------------------- 467 468MKIMAGE := $(srctree)/scripts/mkuboot.sh 469 470# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces 471# the number of overrides in arch makefiles 472UIMAGE_ARCH ?= $(SRCARCH) 473UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) 474UIMAGE_OPTS-y ?= 475UIMAGE_TYPE ?= kernel 476UIMAGE_LOADADDR ?= arch_must_set_this 477UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) 478UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' 479UIMAGE_IN ?= $< 480UIMAGE_OUT ?= $@ 481 482quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) 483 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ 484 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ 485 -T $(UIMAGE_TYPE) \ 486 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ 487 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT) 488 489# XZ 490# --------------------------------------------------------------------------- 491# Use xzkern to compress the kernel image and xzmisc to compress other things. 492# 493# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage 494# of the kernel decompressor. A BCJ filter is used if it is available for 495# the target architecture. xzkern also appends uncompressed size of the data 496# using size_append. The .xz format has the size information available at 497# the end of the file too, but it's in more complex format and it's good to 498# avoid changing the part of the boot code that reads the uncompressed size. 499# Note that the bytes added by size_append will make the xz tool think that 500# the file is corrupt. This is expected. 501# 502# xzmisc doesn't use size_append, so it can be used to create normal .xz 503# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very 504# big dictionary would increase the memory usage too much in the multi-call 505# decompression mode. A BCJ filter isn't used either. 506quiet_cmd_xzkern = XZKERN $@ 507cmd_xzkern = (cat $(filter-out FORCE,$^) | \ 508 sh $(srctree)/scripts/xz_wrap.sh && \ 509 $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 510 (rm -f $@ ; false) 511 512quiet_cmd_xzmisc = XZMISC $@ 513cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ 514 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ 515 (rm -f $@ ; false) 516 517# Additional commands for U-Boot 518# 519# mkimage 520# --------------------------------------------------------------------------- 521MKIMAGEOUTPUT ?= /dev/null 522quiet_cmd_mkimage = MKIMAGE $@ 523cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \ 524 $(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT)) 525 526# fdtgrep 527# --------------------------------------------------------------------------- 528# Pass the original device tree file through fdtgrep twice. The first pass 529# removes any unwanted nodes (i.e. those which don't have the 530# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second 531# pass removes various unused properties from the remaining nodes. 532# The output is typically a much smaller device tree file. 533ifeq ($(CONFIG_TPL_BUILD),y) 534fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl 535else 536fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl 537endif 538quiet_cmd_fdtgrep = FDTGREP $@ 539 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \ 540 -n /chosen -n /config -O dtb | \ 541 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 542 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) 543