1# SPDX-License-Identifier: GPL-2.0 2# Backward compatibility 3asflags-y += $(EXTRA_AFLAGS) 4ccflags-y += $(EXTRA_CFLAGS) 5cppflags-y += $(EXTRA_CPPFLAGS) 6ldflags-y += $(EXTRA_LDFLAGS) 7 8# 9# flags that take effect in sub directories 10export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y) 11export 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 19obj-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 24lib-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. 37modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) 38 39__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) 40subdir-y += $(__subdir-y) 41__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) 42subdir-m += $(__subdir-m) 43obj-y := $(patsubst %/, %/built-in.o, $(obj-y)) 44obj-m := $(filter-out %/, $(obj-m)) 45 46# Subdirectories we need to descend into 47 48subdir-ym := $(sort $(subdir-y) $(subdir-m)) 49 50# if $(foo-objs) exists, foo.o is a composite object 51multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) 52multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) 53multi-used := $(multi-used-y) $(multi-used-m) 54single-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) 58multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y))) 59multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y))) 60 61# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to 62# tell kbuild to descend 63subdir-obj-y := $(filter %/built-in.o, $(obj-y)) 64 65# Replace multi-part objects by their individual parts, look at local dir only 66real-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) 67real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) 68 69# Add subdir path 70 71extra-y := $(addprefix $(obj)/,$(extra-y)) 72always := $(addprefix $(obj)/,$(always)) 73targets := $(addprefix $(obj)/,$(targets)) 74modorder := $(addprefix $(obj)/,$(modorder)) 75obj-y := $(addprefix $(obj)/,$(obj-y)) 76obj-m := $(addprefix $(obj)/,$(obj-m)) 77lib-y := $(addprefix $(obj)/,$(lib-y)) 78subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) 79real-objs-y := $(addprefix $(obj)/,$(real-objs-y)) 80real-objs-m := $(addprefix $(obj)/,$(real-objs-m)) 81single-used-m := $(addprefix $(obj)/,$(single-used-m)) 82multi-used-y := $(addprefix $(obj)/,$(multi-used-y)) 83multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) 84multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y)) 85multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m)) 86subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) 87 88# These flags are needed for modversions and compiling, so we define them here 89# already 90# $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will 91# end up in (or would, if it gets compiled in) 92# Note: Files that end up in two or more modules are compiled without the 93# KBUILD_MODNAME definition. The reason is that any made-up name would 94# differ in different configs. 95name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote) 96basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) 97modname_flags = $(if $(filter 1,$(words $(modname))),\ 98 -DKBUILD_MODNAME=$(call name-fix,$(modname))) 99 100orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \ 101 $(ccflags-y) $(CFLAGS_$(basetarget).o) 102_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) 103orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \ 104 $(asflags-y) $(AFLAGS_$(basetarget).o) 105_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags)) 106_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) 107 108# 109# Enable gcov profiling flags for a file, directory or for all files depending 110# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL 111# (in this order) 112# 113ifeq ($(CONFIG_GCOV_KERNEL),y) 114_c_flags += $(if $(patsubst n%,, \ 115 $(GCOV_PROFILE_$(basetarget).o)$(GCOV_PROFILE)$(CONFIG_GCOV_PROFILE_ALL)), \ 116 $(CFLAGS_GCOV)) 117endif 118 119# 120# Enable address sanitizer flags for kernel except some files or directories 121# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE) 122# 123ifeq ($(CONFIG_KASAN),y) 124_c_flags += $(if $(patsubst n%,, \ 125 $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ 126 $(CFLAGS_KASAN)) 127endif 128 129# If building the kernel in a separate objtree expand all occurrences 130# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). 131 132ifeq ($(KBUILD_SRC),) 133__c_flags = $(_c_flags) 134__a_flags = $(_a_flags) 135__cpp_flags = $(_cpp_flags) 136else 137 138# -I$(obj) locates generated .h files 139# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files 140# and locates generated .h files 141# FIXME: Replace both with specific CFLAGS* statements in the makefiles 142__c_flags = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \ 143 $(call flags,_c_flags) 144__a_flags = $(call flags,_a_flags) 145__cpp_flags = $(call flags,_cpp_flags) 146endif 147 148# Modified for U-Boot: LINUXINCLUDE -> UBOOTINCLUDE 149c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 150 $(__c_flags) $(modkern_cflags) \ 151 $(basename_flags) $(modname_flags) 152 153a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 154 $(__a_flags) $(modkern_aflags) 155 156cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(UBOOTINCLUDE) \ 157 $(__cpp_flags) 158 159ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) 160 161# Try these files in order to find the U-Boot-specific .dtsi include file 162u_boot_dtsi_options = $(strip $(wildcard $(dir $<)$(basename $(notdir $<))-u-boot.dtsi) \ 163 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \ 164 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \ 165 $(wildcard $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \ 166 $(wildcard $(dir $<)u-boot.dtsi)) 167 168u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \ 169 $(dir $<)$(basename $(notdir $<))-u-boot.dtsi \ 170 $(dir $<)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \ 171 $(dir $<)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \ 172 $(dir $<)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \ 173 $(dir $<)u-boot.dtsi ... \ 174 found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!)) 175 176# Uncomment for debugging 177# This shows all the files that were considered and the one that we chose. 178# u_boot_dtsi_options_debug = $(u_boot_dtsi_options_raw) 179 180# We use the first match 181u_boot_dtsi = $(strip $(u_boot_dtsi_options_debug) \ 182 $(notdir $(firstword $(u_boot_dtsi_options)))) 183 184# Modified for U-Boot 185dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ 186 -I$(srctree)/arch/$(ARCH)/dts \ 187 -I$(srctree)/arch/$(ARCH)/dts/include \ 188 -Iinclude \ 189 -I$(srctree)/include \ 190 -I$(srctree)/arch/$(ARCH)/include \ 191 -include $(srctree)/include/linux/kconfig.h \ 192 -D__ASSEMBLY__ \ 193 -undef -D__DTS__ 194 195# Finds the multi-part object the current object will be linked into 196modname-multi = $(sort $(foreach m,$(multi-used),\ 197 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) 198 199# Useful for describing the dependency of composite objects 200# Usage: 201# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) 202define multi_depend 203$(foreach m, $(notdir $1), \ 204 $(eval $(obj)/$m: \ 205 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) 206endef 207 208# LEX 209# --------------------------------------------------------------------------- 210quiet_cmd_flex = LEX $@ 211 cmd_flex = $(LEX) -o$@ -L $< 212 213$(obj)/%.lex.c: $(src)/%.l FORCE 214 $(call if_changed,flex) 215 216# YACC 217# --------------------------------------------------------------------------- 218quiet_cmd_bison = YACC $@ 219 cmd_bison = $(YACC) -o$@ -t -l $< 220 221$(obj)/%.tab.c: $(src)/%.y FORCE 222 $(call if_changed,bison) 223 224quiet_cmd_bison_h = YACC $@ 225 cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $< 226 227$(obj)/%.tab.h: $(src)/%.y FORCE 228 $(call if_changed,bison_h) 229 230# Shipped files 231# =========================================================================== 232 233quiet_cmd_shipped = SHIPPED $@ 234cmd_shipped = cat $< > $@ 235 236$(obj)/%: $(src)/%_shipped 237 $(call cmd,shipped) 238 239# Commands useful for building a boot image 240# =========================================================================== 241# 242# Use as following: 243# 244# target: source(s) FORCE 245# $(if_changed,ld/objcopy/gzip) 246# 247# and add target to extra-y so that we know we have to 248# read in the saved command line 249 250# Linking 251# --------------------------------------------------------------------------- 252 253quiet_cmd_ld = LD $@ 254cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@ 255 256# Objcopy 257# --------------------------------------------------------------------------- 258 259quiet_cmd_objcopy = OBJCOPY $@ 260cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ 261 262# Gzip 263# --------------------------------------------------------------------------- 264 265quiet_cmd_gzip = GZIP $@ 266cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ 267 (rm -f $@ ; false) 268 269# DTC 270# --------------------------------------------------------------------------- 271 272# Disable noisy checks by default 273ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) 274DTC_FLAGS += -Wno-unit_address_vs_reg \ 275 -Wno-unit_address_format \ 276 -Wno-avoid_unnecessary_addr_size \ 277 -Wno-alias_paths \ 278 -Wno-graph_child_address \ 279 -Wno-graph_port \ 280 -Wno-unique_unit_address \ 281 -Wno-simple_bus_reg \ 282 -Wno-pci_device_reg 283 284# U-Boot specific disables 285DTC_FLAGS += -Wno-pci_bridge \ 286 -Wno-pci_device_bus_num 287endif 288 289ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) 290DTC_FLAGS += -Wnode_name_chars_strict \ 291 -Wproperty_name_chars_strict 292endif 293 294DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) 295 296# Generate an assembly file to wrap the output of the device tree compiler 297quiet_cmd_dt_S_dtb= DTB $@ 298# Modified for U-Boot 299cmd_dt_S_dtb= \ 300( \ 301 echo '.section .dtb.init.rodata,"a"'; \ 302 echo '.balign 16'; \ 303 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ 304 echo '__dtb_$(subst -,_,$(*F))_begin:'; \ 305 echo '.incbin "$<" '; \ 306 echo '__dtb_$(subst -,_,$(*F))_end:'; \ 307 echo '.global __dtb_$(subst -,_,$(*F))_end'; \ 308 echo '.balign 16'; \ 309) > $@ 310 311$(obj)/%.dtb.S: $(obj)/%.dtb 312 $(call cmd,dt_S_dtb) 313 314ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y) 315DTC_FLAGS += -@ 316endif 317 318quiet_cmd_dtc = DTC $@ 319# Modified for U-Boot 320# Bring in any U-Boot-specific include at the end of the file 321cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ 322 (cat $<; $(if $(u_boot_dtsi),echo '$(pound)include "$(u_boot_dtsi)"')) > $(pre-tmp); \ 323 $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \ 324 $(DTC) -O dtb -o $@ -b 0 \ 325 -i $(dir $<) $(DTC_FLAGS) \ 326 -d $(depfile).dtc.tmp $(dtc-tmp) || \ 327 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false) \ 328 ; \ 329 sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 330 331$(obj)/%.dtb: $(src)/%.dts FORCE 332 $(call if_changed_dep,dtc) 333 334pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp) 335dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) 336 337# DTCO 338# --------------------------------------------------------------------------- 339 340quiet_cmd_dtco = DTCO $@ 341# Rule for objects only; does not put specific u-boot include at the end 342# No generation of assembly file either 343# Modified for U-Boot 344cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \ 345 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ 346 $(DTC) -@ -O dtb -o $@ -b 0 \ 347 -i $(dir $<) $(DTC_FLAGS) \ 348 -d $(depfile).dtc.tmp $(dtc-tmp) ; \ 349 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 350 351$(obj)/%.dtbo: $(src)/%.dts FORCE 352 $(call if_changed_dep,dtco) 353 354# Fonts 355# --------------------------------------------------------------------------- 356 357# Generate an assembly file to wrap the font data 358quiet_cmd_S_ttf= TTF $@ 359# Modified for U-Boot 360cmd_S_ttf= \ 361( \ 362 echo '.section .rodata.ttf.init,"a"'; \ 363 echo '.balign 16'; \ 364 echo '.global __ttf_$(*F)_begin'; \ 365 echo '__ttf_$(*F)_begin:'; \ 366 echo '.incbin "$<" '; \ 367 echo '__ttf_$(*F)_end:'; \ 368 echo '.global __ttf_$(*F)_end'; \ 369 echo '.balign 16'; \ 370) > $@ 371 372$(obj)/%.S: $(src)/%.ttf 373 $(call cmd,S_ttf) 374 375# EFI applications 376# A Makefile target *.efi is built as EFI application. 377# A Makefile target *_efi.S wraps *.efi as built-in EFI application. 378# --------------------------------------------------------------------------- 379 380# Generate an assembly file to wrap the EFI app 381cmd_S_efi= \ 382( \ 383 echo '.section .rodata.$*.init,"a"'; \ 384 echo '.balign 16'; \ 385 echo '.global __efi_$*_begin'; \ 386 echo '__efi_$*_begin:'; \ 387 echo '.incbin "$<" '; \ 388 echo '__efi_$*_end:'; \ 389 echo '.global __efi_$*_end'; \ 390 echo '.balign 16'; \ 391) > $@ 392 393$(obj)/%_efi.S: $(obj)/%.efi 394 $(call cmd,S_efi) 395 396quiet_cmd_efi_objcopy = OBJCOPY $@ 397cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \ 398 .dynamic -j .dynsym -j .rel* -j .rela* -j .reloc \ 399 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@ 400 401$(obj)/%.efi: $(obj)/%_efi.so 402 $(call cmd,efi_objcopy) 403 404quiet_cmd_efi_ld = LD $@ 405cmd_efi_ld = $(LD) -nostdlib -znocombreloc -T $(EFI_LDS_PATH) -shared \ 406 -Bsymbolic -znorelro -s $^ -o $@ 407 408EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS) 409 410$(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S) FORCE 411 $(call if_changed_dep,as_o_S) 412 413$(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE 414 $(call cmd,force_checksrc) 415 $(call if_changed_rule,cc_o_c) 416 417$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o 418 $(call cmd,efi_ld) 419 420targets += $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o 421 422CFLAGS_REMOVE_efi_reloc.o := $(LTO_CFLAGS) 423CFLAGS_REMOVE_efi_freestanding.o := $(LTO_CFLAGS) 424 425# ACPI 426# --------------------------------------------------------------------------- 427# 428# This first sends the file (typically dsdt.asl) through the preprocessor 429# resolve includes and any CONFIG options used. This produces dsdt.asl.tmp 430# which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power 431# Interface) Source Language compiler (iasl) then converts this ASL code into a 432# C file containing the hex data to build into U-Boot. This file is called 433# dsdt.hex (despite us setting the prefix to .../dsdt.asl.tmp) so must be 434# renamed to dsdt.c for consumption by the build system. 435ASL_TMP = $(patsubst %.c,%.asl.tmp,$@) 436 437quiet_cmd_acpi_c_asl= ASL $< 438cmd_acpi_c_asl= \ 439 $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -D__ACPI__ \ 440 -P $(UBOOTINCLUDE) -o $(ASL_TMP) $< && \ 441 iasl -p $@ -tc $(ASL_TMP) $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ 442 mv $(patsubst %.c,%.hex,$@) $@ 443 444$(obj)/dsdt.c: $(src)/dsdt.asl 445 $(call cmd,acpi_c_asl) 446 $(Q)sed -i -e "s,dsdt_aml_code,AmlCode," $@ 447 448# Bzip2 449# --------------------------------------------------------------------------- 450 451# Bzip2 and LZMA do not include size in file... so we have to fake that; 452# append the size as a 32-bit littleendian number as gzip does. 453size_append = printf $(shell \ 454dec_size=0; \ 455for F in $1; do \ 456 fsize=$$(stat -c "%s" $$F); \ 457 dec_size=$$(expr $$dec_size + $$fsize); \ 458done; \ 459printf "%08x\n" $$dec_size | \ 460 sed 's/\(..\)/\1 /g' | { \ 461 read ch0 ch1 ch2 ch3; \ 462 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ 463 printf '%s%03o' '\\' $$((0x$$ch)); \ 464 done; \ 465 } \ 466) 467 468quiet_cmd_bzip2 = BZIP2 $@ 469cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ 470 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 471 (rm -f $@ ; false) 472 473# Lzma 474# --------------------------------------------------------------------------- 475 476quiet_cmd_lzma = LZMA $@ 477cmd_lzma = (cat $(filter-out FORCE,$^) | \ 478 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 479 (rm -f $@ ; false) 480 481quiet_cmd_lzo = LZO $@ 482cmd_lzo = (cat $(filter-out FORCE,$^) | \ 483 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 484 (rm -f $@ ; false) 485 486quiet_cmd_lz4 = LZ4 $@ 487cmd_lz4 = (cat $(filter-out FORCE,$^) | \ 488 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 489 (rm -f $@ ; false) 490 491# U-Boot mkimage 492# --------------------------------------------------------------------------- 493 494MKIMAGE := $(srctree)/scripts/mkuboot.sh 495 496# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces 497# the number of overrides in arch makefiles 498UIMAGE_ARCH ?= $(SRCARCH) 499UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) 500UIMAGE_OPTS-y ?= 501UIMAGE_TYPE ?= kernel 502UIMAGE_LOADADDR ?= arch_must_set_this 503UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) 504UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' 505UIMAGE_IN ?= $< 506UIMAGE_OUT ?= $@ 507 508quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) 509 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ 510 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ 511 -T $(UIMAGE_TYPE) \ 512 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ 513 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT) 514 515# XZ 516# --------------------------------------------------------------------------- 517# Use xzkern to compress the kernel image and xzmisc to compress other things. 518# 519# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage 520# of the kernel decompressor. A BCJ filter is used if it is available for 521# the target architecture. xzkern also appends uncompressed size of the data 522# using size_append. The .xz format has the size information available at 523# the end of the file too, but it's in more complex format and it's good to 524# avoid changing the part of the boot code that reads the uncompressed size. 525# Note that the bytes added by size_append will make the xz tool think that 526# the file is corrupt. This is expected. 527# 528# xzmisc doesn't use size_append, so it can be used to create normal .xz 529# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very 530# big dictionary would increase the memory usage too much in the multi-call 531# decompression mode. A BCJ filter isn't used either. 532quiet_cmd_xzkern = XZKERN $@ 533cmd_xzkern = (cat $(filter-out FORCE,$^) | \ 534 sh $(srctree)/scripts/xz_wrap.sh && \ 535 $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 536 (rm -f $@ ; false) 537 538quiet_cmd_xzmisc = XZMISC $@ 539cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ 540 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ 541 (rm -f $@ ; false) 542 543# Additional commands for U-Boot 544# 545# mkimage 546# --------------------------------------------------------------------------- 547MKIMAGEOUTPUT ?= /dev/null 548quiet_cmd_mkimage = MKIMAGE $@ 549cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \ 550 >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT)) 551 552# fdtgrep 553# --------------------------------------------------------------------------- 554# Pass the original device tree file through fdtgrep twice. The first pass 555# removes any unwanted nodes (i.e. those which don't have the 556# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second 557# pass removes various unused properties from the remaining nodes. 558# The output is typically a much smaller device tree file. 559ifeq ($(CONFIG_TPL_BUILD),y) 560fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl 561else 562fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl 563endif 564quiet_cmd_fdtgrep = FDTGREP $@ 565 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \ 566 -n /chosen -n /config -O dtb | \ 567 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 568 -P u-boot,dm-pre-reloc -P u-boot,dm-spl -P u-boot,dm-tpl \ 569 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) 570 571# fdt_rm_props 572# --------------------------------------------------------------------------- 573# Pass the original device tree file through fdtgrep. This removes various 574# unused properties. The output is typically a smaller device tree file. 575quiet_cmd_fdt_rm_props = FDTGREP $@ 576 cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 577 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS))) 578 579# ASM offsets 580# --------------------------------------------------------------------------- 581 582# Default sed regexp - multiline due to syntax constraints 583define sed-offsets 584 "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ 585 /^->/{s:->#\(.*\):/* \1 */:; \ 586 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ 587 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ 588 s:->::; p;}" 589endef 590 591# Use filechk to avoid rebuilds when a header changes, but the resulting file 592# does not 593define filechk_offsets 594 (set -e; \ 595 echo "#ifndef $2"; \ 596 echo "#define $2"; \ 597 echo "/*"; \ 598 echo " * DO NOT MODIFY."; \ 599 echo " *"; \ 600 echo " * This file was generated by Kbuild"; \ 601 echo " */"; \ 602 echo ""; \ 603 sed -ne $(sed-offsets); \ 604 echo ""; \ 605 echo "#endif" ) 606endef 607