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_loc = $(srctree)/arch/$(ARCH)/dts/ 163 164u_boot_dtsi_options = $(strip $(wildcard $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi) \ 165 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi) \ 166 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi) \ 167 $(wildcard $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi) \ 168 $(wildcard $(u_boot_dtsi_loc)u-boot.dtsi)) 169 170u_boot_dtsi_options_raw = $(warning Automatic .dtsi inclusion: options: \ 171 $(u_boot_dtsi_loc)$(basename $(notdir $<))-u-boot.dtsi \ 172 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_SOC))-u-boot.dtsi \ 173 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_CPU))-u-boot.dtsi \ 174 $(u_boot_dtsi_loc)$(subst $\",,$(CONFIG_SYS_VENDOR))-u-boot.dtsi \ 175 $(u_boot_dtsi_loc)u-boot.dtsi ... \ 176 found: $(if $(u_boot_dtsi_options),"$(u_boot_dtsi_options)",nothing!)) 177 178# Uncomment for debugging 179# This shows all the files that were considered and the one that we chose. 180ifdef DEVICE_TREE_DEBUG 181u_boot_dtsi_options_debug = $(warning $(u_boot_dtsi_options_raw)) 182endif 183 184# We use the first match to be included 185dtsi_include_list = $(strip $(u_boot_dtsi_options_debug) \ 186 $(notdir $(firstword $(u_boot_dtsi_options)))) 187 188# The CONFIG_DEVICE_TREE_INCLUDES also need to be included 189dtsi_include_list += $(CONFIG_DEVICE_TREE_INCLUDES) 190 191# Modified for U-Boot 192upstream_dtsi_include = $(addprefix -I, $(srctree)/dts/upstream/src/ \ 193 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/$(ARCH)/*/*))) \ 194 $(if (CONFIG_ARM64), \ 195 $(sort $(dir $(wildcard $(srctree)/dts/upstream/src/arm64/*/*))))) 196dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ 197 $(UBOOTINCLUDE) \ 198 -I$(dir $<) \ 199 -I$(u_boot_dtsi_loc) \ 200 -I$(srctree)/arch/$(ARCH)/dts/include \ 201 -I$(srctree)/include \ 202 $(upstream_dtsi_include) \ 203 -D__ASSEMBLY__ \ 204 -undef -D__DTS__ 205 206# Finds the multi-part object the current object will be linked into 207modname-multi = $(sort $(foreach m,$(multi-used),\ 208 $(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=)))) 209 210# Useful for describing the dependency of composite objects 211# Usage: 212# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add) 213define multi_depend 214$(foreach m, $(notdir $1), \ 215 $(eval $(obj)/$m: \ 216 $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) 217endef 218 219# LEX 220# --------------------------------------------------------------------------- 221quiet_cmd_flex = LEX $@ 222 cmd_flex = $(LEX) -o$@ -L $< 223 224$(obj)/%.lex.c: $(src)/%.l FORCE 225 $(call if_changed,flex) 226 227# YACC 228# --------------------------------------------------------------------------- 229quiet_cmd_bison = YACC $@ 230 cmd_bison = $(YACC) -o$@ -t -l $< 231 232$(obj)/%.tab.c: $(src)/%.y FORCE 233 $(call if_changed,bison) 234 235quiet_cmd_bison_h = YACC $@ 236 cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $< 237 238$(obj)/%.tab.h: $(src)/%.y FORCE 239 $(call if_changed,bison_h) 240 241# Shipped files 242# =========================================================================== 243 244quiet_cmd_shipped = SHIPPED $@ 245cmd_shipped = cat $< > $@ 246 247$(obj)/%: $(src)/%_shipped 248 $(call cmd,shipped) 249 250# Commands useful for building a boot image 251# =========================================================================== 252# 253# Use as following: 254# 255# target: source(s) FORCE 256# $(if_changed,ld/objcopy/gzip) 257# 258# and add target to extra-y so that we know we have to 259# read in the saved command line 260 261# Linking 262# --------------------------------------------------------------------------- 263 264quiet_cmd_ld = LD $@ 265cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@ 266 267# Objcopy 268# --------------------------------------------------------------------------- 269 270quiet_cmd_objcopy = OBJCOPY $@ 271cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ 272 273# Gzip 274# --------------------------------------------------------------------------- 275 276quiet_cmd_gzip = GZIP $@ 277cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ 278 (rm -f $@ ; false) 279 280# DTC 281# --------------------------------------------------------------------------- 282 283# Disable noisy checks by default 284ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) 285DTC_FLAGS += -Wno-unit_address_vs_reg \ 286 -Wno-unit_address_format \ 287 -Wno-avoid_unnecessary_addr_size \ 288 -Wno-alias_paths \ 289 -Wno-graph_child_address \ 290 -Wno-graph_port \ 291 -Wno-unique_unit_address \ 292 -Wno-simple_bus_reg \ 293 -Wno-pci_device_reg 294 295# U-Boot specific disables 296DTC_FLAGS += -Wno-pci_bridge \ 297 -Wno-pci_device_bus_num 298endif 299 300ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) 301DTC_FLAGS += -Wnode_name_chars_strict \ 302 -Wproperty_name_chars_strict 303endif 304 305DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) 306 307# Generate an assembly file to wrap the output of the device tree compiler 308quiet_cmd_dt_S_dtb= DTB $@ 309# Modified for U-Boot 310cmd_dt_S_dtb= \ 311( \ 312 echo '.section .dtb.init.rodata,"a"'; \ 313 echo '.balign 16'; \ 314 echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ 315 echo '__dtb_$(subst -,_,$(*F))_begin:'; \ 316 echo '.incbin "$<" '; \ 317 echo '__dtb_$(subst -,_,$(*F))_end:'; \ 318 echo '.global __dtb_$(subst -,_,$(*F))_end'; \ 319 echo '.balign 16'; \ 320) > $@ 321 322$(obj)/%.dtb.S: $(obj)/%.dtb 323 $(call cmd,dt_S_dtb) 324 325ifeq ($(CONFIG_OF_LIBFDT_OVERLAY),y) 326DTC_FLAGS += -@ 327endif 328 329quiet_cmd_dtc = DTC $@ 330# Modified for U-Boot 331# Bring in any U-Boot-specific include at the end of the file 332# And finally any custom .dtsi fragments specified with CONFIG_DEVICE_TREE_INCLUDES 333cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ 334 (cat $< > $(pre-tmp)); \ 335 $(foreach f,$(subst $(quote),,$(dtsi_include_list)), \ 336 echo '$(pound)include "$(f)"' >> $(pre-tmp);) \ 337 $(HOSTCC) -E $(dtc_cpp_flags) -I$(obj) -x assembler-with-cpp -o $(dtc-tmp) $(pre-tmp) ; \ 338 $(DTC) -O dtb -o $@ -b 0 \ 339 -i $(dir $<) -i $(u_boot_dtsi_loc) $(DTC_FLAGS) \ 340 -d $(depfile).dtc.tmp $(dtc-tmp) || \ 341 (echo "Check $(shell pwd)/$(pre-tmp) for errors" && false) \ 342 ; \ 343 sed "s:$(pre-tmp):$(<):" $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 344 345quiet_cmd_capsule_esl_gen = CAPSULE_ESL_GEN $@ 346cmd_capsule_esl_gen = \ 347 $(shell sed "s:ESL_BIN_FILE:$(capsule_esl_path):" $(capsule_esl_input_file) > $@) 348 349$(obj)/.capsule_esl.dtsi: FORCE 350ifeq ($(CONFIG_EFI_CAPSULE_ESL_FILE),"") 351 $(error "CONFIG_EFI_CAPSULE_ESL_FILE is empty, EFI capsule authentication \ 352 public key must be specified when CONFIG_EFI_CAPSULE_AUTHENTICATE is enabled") 353else 354 $(call cmd_capsule_esl_gen) 355endif 356 357capsule_esl_input_file=$(srctree)/lib/efi_loader/capsule_esl.dtsi.in 358capsule_esl_dtsi = .capsule_esl.dtsi 359capsule_esl_path=$(abspath $(srctree)/$(subst $(quote),,$(CONFIG_EFI_CAPSULE_ESL_FILE))) 360 361dtsi_include_list_deps := $(addprefix $(u_boot_dtsi_loc),$(subst $(quote),,$(dtsi_include_list))) 362 363ifdef CONFIG_EFI_CAPSULE_AUTHENTICATE 364dtsi_include_list += $(capsule_esl_dtsi) 365dtsi_include_list_deps += $(obj)/$(capsule_esl_dtsi) 366endif 367 368ifneq ($(CHECK_DTBS),) 369DT_CHECKER ?= dt-validate 370DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m) 371DT_BINDING_DIR := dts/upstream/Bindings 372DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json 373 374quiet_cmd_dtb = DTC_CHK $@ 375 cmd_dtb = $(cmd_dtc) ; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true 376else 377quiet_cmd_dtb = $(quiet_cmd_dtc) 378 cmd_dtb = $(cmd_dtc) 379endif 380 381$(obj)/%.dtb: $(src)/%.dts $(DTC) $(dtsi_include_list_deps) $(DT_TMP_SCHEMA) FORCE 382 $(call if_changed_dep,dtb) 383 384pre-tmp = $(subst $(comma),_,$(dot-target).pre.tmp) 385dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) 386 387# DTCO 388# --------------------------------------------------------------------------- 389 390quiet_cmd_dtco = DTCO $@ 391# Rule for objects only; does not put specific u-boot include at the end 392# No generation of assembly file either 393# Modified for U-Boot 394cmd_dtco = mkdir -p $(dir ${dtc-tmp}) ; \ 395 $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ 396 $(DTC) -@ -O dtb -o $@ -b 0 \ 397 -i $(dir $<) $(DTC_FLAGS) \ 398 -d $(depfile).dtc.tmp $(dtc-tmp) ; \ 399 cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) 400 401$(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE 402 $(call if_changed_dep,dtco) 403 404$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE 405 $(call if_changed_dep,dtco) 406 407# Fonts 408# --------------------------------------------------------------------------- 409 410# Generate an assembly file to wrap the font data 411quiet_cmd_S_ttf= TTF $@ 412# Modified for U-Boot 413cmd_S_ttf= \ 414( \ 415 echo '.section .rodata.ttf.init,"a"'; \ 416 echo '.balign 16'; \ 417 echo '.global __ttf_$(*F)_begin'; \ 418 echo '__ttf_$(*F)_begin:'; \ 419 echo '.incbin "$<" '; \ 420 echo '__ttf_$(*F)_end:'; \ 421 echo '.global __ttf_$(*F)_end'; \ 422 echo '.balign 16'; \ 423) > $@ 424 425$(obj)/%.S: $(src)/%.ttf 426 $(call cmd,S_ttf) 427 428# Splash logos 429# --------------------------------------------------------------------------- 430 431# Generate an assembly file to wrap the splash data 432quiet_cmd_S_splash= TTF $@ 433# Modified for U-Boot 434cmd_S_splash= \ 435( \ 436 echo '.section .rodata.splash.init,"a"'; \ 437 echo '.balign 16'; \ 438 echo '.global __splash_$(*F)_begin'; \ 439 echo '__splash_$(*F)_begin:'; \ 440 echo '.incbin "$<" '; \ 441 echo '__splash_$(*F)_end:'; \ 442 echo '.global __splash_$(*F)_end'; \ 443 echo '.balign 16'; \ 444) > $@ 445 446$(obj)/%.S: $(src)/%.bmp 447 $(call cmd,S_splash) 448 449# EFI applications 450# A Makefile target *.efi is built as EFI application. 451# A Makefile target *_efi.S wraps *.efi as built-in EFI application. 452# --------------------------------------------------------------------------- 453 454# Generate an assembly file to wrap the EFI app 455cmd_S_efi= \ 456( \ 457 echo '.section .rodata.$*.init,"a"'; \ 458 echo '.balign 16'; \ 459 echo '.global __efi_$*_begin'; \ 460 echo '__efi_$*_begin:'; \ 461 echo '.incbin "$<" '; \ 462 echo '__efi_$*_end:'; \ 463 echo '.global __efi_$*_end'; \ 464 echo '.balign 16'; \ 465) > $@ 466 467$(obj)/%_efi.S: $(obj)/%.efi 468 $(call cmd,S_efi) 469 470quiet_cmd_efi_objcopy = OBJCOPY $@ 471cmd_efi_objcopy = $(OBJCOPY) -j .header -j .text -j .sdata -j .data -j \ 472 .dynamic -j .dynsym -j .rel* -j .rela* -j .reloc \ 473 $(if $(EFI_TARGET),$(EFI_TARGET),-O binary) $^ $@ 474 475$(obj)/%.efi: $(obj)/%_efi.so 476 $(call cmd,efi_objcopy) 477 478KBUILD_EFILDFLAGS = -nostdlib -zexecstack -znocombreloc -znorelro 479KBUILD_EFILDFLAGS += $(call ld-option,--no-warn-rwx-segments) 480quiet_cmd_efi_ld = LD $@ 481cmd_efi_ld = $(LD) $(KBUILD_EFILDFLAGS) -T $(EFI_LDS_PATH) \ 482 -shared -Bsymbolic -s $^ -o $@ 483 484EFI_LDS_PATH = $(srctree)/arch/$(ARCH)/lib/$(EFI_LDS) 485 486$(obj)/efi_crt0.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_CRT0:.o=.S) FORCE 487 $(call if_changed_dep,as_o_S) 488 489$(obj)/efi_reloc.o: $(srctree)/arch/$(ARCH)/lib/$(EFI_RELOC:.o=.c) $(recordmcount_source) FORCE 490 $(call cmd,force_checksrc) 491 $(call if_changed_rule,cc_o_c) 492 493$(obj)/%_efi.so: $(obj)/%.o $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o 494 $(call cmd,efi_ld) 495 496targets += $(obj)/efi_crt0.o $(obj)/efi_reloc.o $(obj)/efi_freestanding.o 497 498CFLAGS_REMOVE_efi_reloc.o := $(LTO_CFLAGS) 499CFLAGS_REMOVE_efi_freestanding.o := $(LTO_CFLAGS) 500 501# ACPI 502# --------------------------------------------------------------------------- 503# 504# This first sends the file (typically dsdt.asl) through the preprocessor 505# resolve includes and any CONFIG options used. This produces dsdt.asl.tmp 506# which is pure ASL code. The Intel ASL (ACPI (Advanced Configuration and Power 507# Interface) Source Language compiler (iasl) then converts this ASL code into a 508# C file containing the hex data to build into U-Boot. This file is called 509# dsdt_generated.hex (despite us setting the prefix to .../dsdt_generated.asl.tmp) 510# so must be renamed to dsdt_generated.c for consumption by the build system. 511ASL_TMP = $(patsubst %.c,%.asl.tmp,$@) 512 513quiet_cmd_acpi_c_asl= ASL $< 514cmd_acpi_c_asl= \ 515 $(CPP) -x assembler-with-cpp -D__ASSEMBLY__ -D__ACPI__ \ 516 -P $(UBOOTINCLUDE) -o $(ASL_TMP) $< && \ 517 iasl -p $@ -I $(srctree)/board/$(BOARDDIR) -tc $(ASL_TMP) \ 518 $(if $(KBUILD_VERBOSE:1=), >/dev/null) && \ 519 mv $(patsubst %.c,%.hex,$@) $@ 520 521$(obj)/dsdt_generated.c: $(src)/dsdt.asl 522 $(call cmd,acpi_c_asl) 523 $(Q)sed -i -e "s,dsdt_generated_aml_code,AmlCode," $@ 524 525# Bzip2 526# --------------------------------------------------------------------------- 527 528# Bzip2 and LZMA do not include size in file... so we have to fake that; 529# append the size as a 32-bit littleendian number as gzip does. 530size_append = printf $(shell \ 531dec_size=0; \ 532for F in $1; do \ 533 fsize=$$(stat -c "%s" $$F); \ 534 dec_size=$$(expr $$dec_size + $$fsize); \ 535done; \ 536printf "%08x\n" $$dec_size | \ 537 sed 's/\(..\)/\1 /g' | { \ 538 read ch0 ch1 ch2 ch3; \ 539 for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \ 540 printf '%s%03o' '\\' $$((0x$$ch)); \ 541 done; \ 542 } \ 543) 544 545quiet_cmd_bzip2 = BZIP2 $@ 546cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ 547 bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 548 (rm -f $@ ; false) 549 550# Lzma 551# --------------------------------------------------------------------------- 552 553quiet_cmd_lzma = LZMA $@ 554cmd_lzma = (cat $(filter-out FORCE,$^) | \ 555 lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 556 (rm -f $@ ; false) 557 558quiet_cmd_lzo = LZO $@ 559cmd_lzo = (cat $(filter-out FORCE,$^) | \ 560 lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 561 (rm -f $@ ; false) 562 563quiet_cmd_lz4 = LZ4 $@ 564cmd_lz4 = (cat $(filter-out FORCE,$^) | \ 565 lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 566 (rm -f $@ ; false) 567 568# U-Boot mkimage 569# --------------------------------------------------------------------------- 570 571MKIMAGE := $(srctree)/scripts/mkuboot.sh 572 573# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces 574# the number of overrides in arch makefiles 575UIMAGE_ARCH ?= $(SRCARCH) 576UIMAGE_COMPRESSION ?= $(if $(2),$(2),none) 577UIMAGE_OPTS-y ?= 578UIMAGE_TYPE ?= kernel 579UIMAGE_LOADADDR ?= arch_must_set_this 580UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) 581UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' 582UIMAGE_IN ?= $< 583UIMAGE_OUT ?= $@ 584 585quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) 586 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \ 587 -C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \ 588 -T $(UIMAGE_TYPE) \ 589 -a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \ 590 -n $(UIMAGE_NAME) -d $(UIMAGE_IN) $(UIMAGE_OUT) 591 592# XZ 593# --------------------------------------------------------------------------- 594# Use xzkern to compress the kernel image and xzmisc to compress other things. 595# 596# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage 597# of the kernel decompressor. A BCJ filter is used if it is available for 598# the target architecture. xzkern also appends uncompressed size of the data 599# using size_append. The .xz format has the size information available at 600# the end of the file too, but it's in more complex format and it's good to 601# avoid changing the part of the boot code that reads the uncompressed size. 602# Note that the bytes added by size_append will make the xz tool think that 603# the file is corrupt. This is expected. 604# 605# xzmisc doesn't use size_append, so it can be used to create normal .xz 606# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very 607# big dictionary would increase the memory usage too much in the multi-call 608# decompression mode. A BCJ filter isn't used either. 609quiet_cmd_xzkern = XZKERN $@ 610cmd_xzkern = (cat $(filter-out FORCE,$^) | \ 611 sh $(srctree)/scripts/xz_wrap.sh && \ 612 $(call size_append, $(filter-out FORCE,$^))) > $@ || \ 613 (rm -f $@ ; false) 614 615quiet_cmd_xzmisc = XZMISC $@ 616cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ 617 xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ 618 (rm -f $@ ; false) 619 620# Additional commands for U-Boot 621# 622# bin2c 623# --------------------------------------------------------------------------- 624quiet_cmd_bin2c = BIN2C $@ 625 cmd_bin2c = $(objtree)/scripts/bin2c $2 < $< > $@ 626 627# mkimage 628# --------------------------------------------------------------------------- 629MKIMAGEOUTPUT ?= /dev/null 630quiet_cmd_mkimage = MKIMAGE $@ 631cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \ 632 >$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT)) 633 634# fdtgrep 635# --------------------------------------------------------------------------- 636# Pass the original device tree file through fdtgrep twice. The first pass 637# removes any unwanted nodes (i.e. those which don't have the 638# 'bootph-all' property and thus are not needed by SPL. The second 639# pass removes various unused properties from the remaining nodes. 640# The output is typically a much smaller device tree file. 641 642ifdef CONFIG_OF_TAG_MIGRATE 643# Support the old tags for a migration period 644migrate_tpl := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl 645migrate_vpl := -b u-boot,dm-pre-reloc -b u-boot,dm-vpl 646migrate_spl := -b u-boot,dm-pre-reloc -b u-boot,dm-spl 647migrate_all := -P u-boot,dm-pre-reloc \ 648 -P u-boot,dm-spl -P u-boot,dm-tpl -P u-boot,dm-vpl 649endif 650 651ifeq ($(CONFIG_VPL_BUILD),y) 652fdtgrep_props := -b bootph-all -b bootph-verify $(migrate_vpl) 653else 654ifeq ($(CONFIG_TPL_BUILD),y) 655fdtgrep_props := -b bootph-all -b bootph-pre-sram $(migrate_tpl) 656else 657fdtgrep_props := -b bootph-all -b bootph-pre-ram $(migrate_spl) 658endif 659endif 660 661# This rule produces the .dtb for an SPL build. 662# 663# The first fdtgrep keeps nodes with the above properties (with -u ensuring that 664# the properties are implied in all parents of a matching node). The root node 665# is always included, along with /chosen and /config nodes. Referenced aliases 666# (i.e. properties in /aliases which point to an incldued node) are also 667# included. 668# 669# The second fdtgrep removes all bootph properties along with unused strings 670# and any properties in CONFIG_OF_SPL_REMOVE_PROPS 671quiet_cmd_fdtgrep = FDTGREP $@ 672 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -u -RT $< \ 673 -n /chosen -n /config -O dtb | \ 674 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 675 -P bootph-all -P bootph-pre-ram -P bootph-pre-sram \ 676 -P bootph-verify \ 677 $(migrate_all) \ 678 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) 679 680# fdt_rm_props 681# --------------------------------------------------------------------------- 682# Pass the original device tree file through fdtgrep. This removes various 683# unused properties. The output is typically a smaller device tree file. 684quiet_cmd_fdt_rm_props = FDTGREP $@ 685 cmd_fdt_rm_props = cat $< | $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 686 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_REMOVE_PROPS))) 687 688# ASM offsets 689# --------------------------------------------------------------------------- 690 691# Default sed regexp - multiline due to syntax constraints 692define sed-offsets 693 "s:[[:space:]]*\.ascii[[:space:]]*\"\(.*\)\":\1:; \ 694 /^->/{s:->#\(.*\):/* \1 */:; \ 695 s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \ 696 s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \ 697 s:->::; p;}" 698endef 699 700# Use filechk to avoid rebuilds when a header changes, but the resulting file 701# does not 702define filechk_offsets 703 (set -e; \ 704 echo "#ifndef $2"; \ 705 echo "#define $2"; \ 706 echo "/*"; \ 707 echo " * DO NOT MODIFY."; \ 708 echo " *"; \ 709 echo " * This file was generated by Kbuild"; \ 710 echo " */"; \ 711 echo ""; \ 712 sed -ne $(sed-offsets); \ 713 echo ""; \ 714 echo "#endif" ) 715endef 716